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19-2321; Rev 0; 4/02
15kV ESD-Protected USB Level Translator in UCSP with USB Detect
General Description
The MAX3341E USB level translator converts logic-level signals to USB signals, and USB signals to logic-level signals. An internal 1.5k USB termination resistor supports full-speed (12Mbps) USB operation. The MAX3341E provides built-in 15kV ESD-protection circuitry on the USB I/O pins, D+ and D-, and VCC. The MAX3341E operates with logic supply voltages as low as 1.8V, ensuring compatibility with low-voltage ASICs. The suspend mode lowers supply current to less than 50A. A unique enumerate feature allows changes in USB communication protocol while power is applied. The MAX3341E is fully compliant with USB specification 1.1, and full-speed operation under USB specification 2.0. The MAX3341E has a USB detect that monitors the USB bus for insertion and signals this event. The MAX3341E is available in the miniature 4 4 UCSPTM, as well as the small 16-pin TSSOP, and is specified over the extended temperature range, -40C to +85C. o o o o o o o o o o o o o o
Features
15kV ESD Protection On D+ and DComplies with USB Standard 1.1 (Full Speed 2.0) USB Skew Independent of Input Skew Separate VP and VM Inputs/Outputs VL Down to 1.8V Allows Connection with LowVoltage ASICs Reenumerate with Power Applied USB Detect Function Allows Single-Ended or Differential Logic I/O Internal Linear Regulator Allows Direct Powering from the USB Internal Termination Resistor for Full-Speed Operation Three-State Outputs No Power-Supply Sequencing Required Driver Active in Suspend Mode Available in Miniature Chip-Scale Package
MAX3341E
Applications
Cell Phones PC Peripherals Information Appliances Data Cradles PDAs MP3 Players Digital Cameras
UCSP is a trademark of Maxim Integrated Products, Inc.
PART MAX3341EEUD MAX3341EEBE*
Ordering Information
TEMP RANGE -40C to +85C -40C to +85C PIN-PACKAGE 16 TSSOP 4 4 UCSP**
*Future product--contact factory for availability. **UCSP reliability is integrally linked to the user's assembly methods, circuit board material, and environment. See the UCSP Reliability Notice in the UCSP Reliability section of this data sheet for more information. Pin Configurations appear at end of data sheet.
Typical Operating Circuit
1F
SYSTEM SUPPLY VOLTAGE
0.1F
SYSTEM INTERFACE
VL RCV MAX3341E VPI VMI SUSPEND OE USB_DET MODE ENUMERATE VPO VMO GND
VCC D+
VBUS 23.7 23.7 D+ DGND USB INTERFACE CONNECTOR
DVTRM 1F
________________________________________________________________ Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
15kV ESD-Protected USB Level Translator in UCSP with USB Detect MAX3341E
ABSOLUTE MAXIMUM RATINGS
(All Voltages Refer to GND Unless Otherwise Noted.) Supply Voltage (VCC) ...............................................-0.3V to +6V Output of Internal Regulator (VTRM) (Note 1) ..........-0.3V to +6V Input Voltage (D+, D-) (Notes 1, 2) ..........................-0.3V to +6V System Supply Voltage (VL) .....................................-0.3V to +6V RCV, SUSP, VMO, MODE, VPO, OE, VMI, VPI, USB_DET, ENUM...................................-0.3V to (VL + 0.3V) Short-Circuit Current (D+, D-) to VCC or Ground (Note 3) .........................................................Continuous Maximum Continuous Current (all other pins) ..................15mA Continuous Power Dissipation (TA = +70C) 16-Pin TSSOP (derate 7.1mW/C above +70C) .........571mW 4 4 UCSP (derate 8.2 mW/C above +70C) ............659mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C
Note 1: Guaranteed for VCC < +3.7V only. Note 2: Absolute Maximum Rating for input voltage (D+, D-) with VCC > +3.7V is -0.3V to (VCC +0.3V). Note 3: External 23.7 resistors connected to D+ and D-.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = 4V to 5.5V bypassed with 1F to GND, GND = 0, VL = 1.8V to 3.6V, D+ to GND = 15k, D- to GND = 15k, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25C.)
PARAMETER USB Supply Voltage USB Supply Current USB SUSP Supply Current VCC Supply Current D+/D- Leakage Current VL Suspend Supply Current LOGIC-SIDE I/O VL Input Range Input High Voltage Input Low Voltage Output Voltage High Output Voltage Low Input Leakage Current USB-SIDE I/O Output Voltage Low Output Voltage High Input Impedance Single-Ended Input Voltage High Single-Ended Input Voltage Low Receiver Single-Ended Hysteresis Differential Input Sensitivity VOL VOH ZIN VIH VIL VHYS VDIFF 200 200 D+ or DD+ or DThree-state driver 2.8 1 2.0 0.8 0.3 3.6 V V M V V mV mV VL VIH VIL VOH VOL SUSP, MODE, ENUM, OE, VMO, VPO SUSP, MODE, ENUM, OE, VMO, VPO VPI, VMI, RCV, USB_DET; ISOURCE = 1mA VPI, VMI, RCV, USB_DET; ISINK = -1mA SUSP, MODE, ENUM, OE, VMO, VPO = 0 or VL 1 VL - 0.2 0.4 10 1.8 2/3 VL 0.4 3.6 V V V V V A SYMBOL VCC ICC ICC(SUSP) ICC(< 3V) ID+/D-(3V) IL(SUSP) Data rate = 12Mbps, CL = 50pF (Figure 6b) SUSP = high, ENUM = low, OE = high SUSP = high, OE = low SUSP = high, ENUM = high, OE = high VCC < 3V VCC = 3V; D+, D- < 3.6V SUSP = high, 0 < VCC < 5.5V CONDITIONS MIN 4 10 TYP MAX 5.5 20 50 85 85 80 10 20 A A A A UNITS V mA
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15kV ESD-Protected USB Level Translator in UCSP with USB Detect
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 4V to 5.5V bypassed with 1F to GND, GND = 0, VL = 1.8V to 3.6V, D+ to GND = 15k, D- to GND = 15k, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25C.)
PARAMETER Input Common-Mode Voltage Range Driver Output Impedance Internal Resistor Termination Voltage USB_DET Threshold USB_DET Hysteresis LINEAR REGULATOR Power-Supply Rejection Ratio External Capacitor ESD PROTECTION (VCC, D+, D-) Human Body Model IEC1000-4-2 Air-Gap Discharge IEC1000-4-2 Contact Discharge 15 15 8 kV kV kV PSRR COUT f = 10kHz, COUT = 1F, D+/D- load Compensation of linear regulator 1 30 dB F SYMBOL VCM ZOUT RPU VTRM VUSBLH VUSBHL VUSBHYS 3.7 25 Including 23.7 (1%) external resistors CONDITIONS MIN 0.8 28.5 1.425 3.0 1.500 3.3 TYP MAX 2.5 43.5 1.575 3.6 4.0 UNITS V k V V mV
MAX3341E
TIMING CHARACTERISTICS
(VCC = 4V to 5.5V, GND = 0, VL = 1.8V to 3.6V, D+ to GND = 15k, D- to GND = 15k, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25C.) (Figures 2-6)
PARAMETER OE to Transmit Delay Enable Time OE to Driver Three-State Delay Driver Disable Time USB Detect Signal Delay TRANSMITTER VPO/VMO to D+/D- Propagation Delay VPO to D+/D- Propagation Delay Rise Time D+/DFall Time D+/DRise- and Fall-Time Matching Output Signal Crossover D+/D- to RCV Propagation Delay Rise Time RCV Fall Time RCV tPLH1(drv) tPHL1(drv) tPLH0(drv) tPHL0(drv) tR tF tR/tF VCRS tPLH(RCV) tPHL(RCV) tR tF (Note 4) MODE = high , Figure 6c MODE = high, Figure 6c MODE = low, Figure 6c MODE = low, Figure 6c 4 4 90 1.3 30 30 35 35 20 20 110 2 30 30 15 15 ns ns ns ns % V SYMBOL tPZD tPDZ tDUSB Figure 6c Figure 6c Figure 6b 7.5 CONDITIONS MIN 15 TYP MAX 80 25 UNITS ns ns s
DIFFERENTIAL RECEIVER (Figure 6a) ns ns ns
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15kV ESD-Protected USB Level Translator in UCSP with USB Detect MAX3341E
TIMING CHARACTERISTICS (continued)
(VCC = 4V to 5.5V, GND = 0, VL = 1.8V to 3.6V, D+ to GND = 15k, D- to GND = 15k, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25C.) (Figures 2-6)
PARAMETER SINGLE-ENDED RECEIVERS D+/D- to VPI or VMI Propagation Delay Rise Time VPI and VMI Fall Time VPI and VMI Time to Detect Single-Ended Zero tPLH(SE) tPHL(SE) tR(SE) tF(SE) tSE0 Figure 6a Figure 6a Measured from 10% to 90%,Figure 6a Measured from 90% to 10%, Figure 6a 14 15 15 15 15 140 ns ns ns ns SYMBOL CONDITIONS MIN TYP MAX UNITS
Note 4: Production tested at +25C and +85C only. Limit at -40C guaranteed by correlation.
Typical Operating Characteristics
(VCC = 5V, VL = 3.3V, TA = +25C, unless otherwise noted.)
DIFFERENTIAL RECEIVER PROPAGATION DELAY vs. VL
MAX3341 toc01
DIFFERENTIAL RECEIVER PROPAGATION DELAY vs. VCC
MAX3341 toc02
SINGLE-ENDED RECEIVER PROPAGATION DELAY vs. VL
TA = +85C
MAX3341 toc03
20 TA = +85C PROPAGATION DELAY (ns) 17 TA = +25C 14
20 18 PROPAGATION DELAY (ns) 16 TA = +25C 14 12 10 TA = -40C 8 TA = +85C
10 9 PROPAGATION DELAY (ns) 8 TA = +25C 7 6 TA = -40C 5 4
11 TA = -40C 8 1.8 2.3 VL (V) 2.8 3.3
4.00
4.25
4.50
4.75 VCC (V)
5.00
5.25
5.50
1.8
2.3 VL (V)
2.8
3.3
SINGLE-ENDED RECEIVER PROPAGATION DELAY vs. VCC
MAX3341 toc04
TIME TO ENTER SUSPEND MODE vs. VCC
45 40 TIME (ns) TA = +85C
MAX3341 toc05
TRANSMITTER SKEW vs. VCC
2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0 1.9 1.8 1.7 1.6 TA = +25C
MAX3341 toc06
10 9 PROPAGATION DELAY (ns) 8 TA = +25C 7 6 TA = -40C 5 4 4.00 4.25 4.50 4.75 VCC (V) 5.00 5.25 TA = +85C
50
TA = -40C
35 30 25 20 15
TA = +25C
TRANSMITTER SKEW (ns)
TA = -40C
TA = +85C
5.50
4.00
4.25
4.50
4.75 VCC (V)
5.00
5.25
5.50
4.00
4.25
4.50
4.75 VCC (V)
5.00
5.25
5.50
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15kV ESD-Protected USB Level Translator in UCSP with USB Detect
Typical Operating Characteristics (continued)
(VCC = 5V, VL = 3.3V, TA = +25C, unless otherwise noted.)
LOGIC CURRENT CONSUMPTION IN SUSPEND MODE
MAX3341 toc07
MAX3341E
CURRENT CONSUMPTION IN SUSPEND MODE
MAX3341 toc08
VTRM vs. VCC
IVTRM = 15mA 3.4
MAX3341 toc09
9 8 7
25.5 25.0 24.5 IVCC (A) 24.0 23.5 23.0
3.5
6 5 4 3 1.8 2.3 VL (V) 2.8 3.3
VTRM (V) 4.00 4.25 4.50 4.75 VCC (V) 5.00 5.25 5.50
IVL (A)
3.3
3.2
3.1 22.5 22.0 3.0 4.00 4.25 4.50 4.75 VCC (V) 5.00 5.25 5.50
RISE-AND-FALL TIME MATCHING
MAX3341 toc10
SUSPEND RESPONSE
MAX3341 toc11
TRANSMISSION IN SUSPEND MODE (SUSP = 1)
MAX3341 toc12
f = 6MHz
VPO
D+ 1V/div D-
SUSP 0 VMO 2V/div 2V/div
RCV 0
D+
D-
20ns/div
100ns/div
2s/div
USB_DET RESPONSE
MAX3341 toc13
VCC 2V/div 0 USB_DET 0
10s/div
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15kV ESD-Protected USB Level Translator in UCSP with USB Detect MAX3341E
Pin Description
PIN TSSOP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 UCSP D2 D1 C2 C1 B1 B2 A1 A2 B3 A3 A4 B4 C4 D4 D3 C3 NAME RCV VPO MODE VMO OE SUSP VPI VMI ENUM VCC GND DD+ VTRM VL USB_DET FUNCTION Receiver Output. Single-ended CMOS output. RCV responds to the differential input on D+ and D-. ASIC Voltage Positive Output. Logic-level data into the MAX3341E. Mode-Control Input. Selects differential (mode 1) or single-ended (mode 0) input for the system side when converting logic-level signals to USB level signals. Force MODE high to select mode 1. Force MODE low to select mode 0. ASIC Voltage Minus Output. Logic-level data into the MAX3341E. Output Enable. Drive OE low to enable data transmission on D+ and D-. Drive OE high to disable data transmission or to receive data. Suspend Input. Drive SUSP low for normal operation. Drive SUSP high for low-power state. In low-power state, RCV is low, and VPI/VMI are active. ASIC Voltage Positive Input. Logic-level data output from the MAX3341E. ASIC Voltage Minus Input. Logic-level data output from the MAX3341E. Enumerate. Drive ENUM high to connect the internal 1.5k resistor from D+ to 3.3V. Drive ENUM low to disconnect the internal 1.5k resistor. USB-Side Power-Supply Input. Connect VCC to the incoming USB power supply. Bypass VCC to GND with a 1F ceramic capacitor. Ground Negative USB Differential Data Input/Output. Connect to the USB's D- signal through a 23.7 1% resistor. Positive USB Differential Data Input/Output. Connect to the USB's D+ signal through a 23.7 1% resistor. Regulated Output Voltage. 3.3V output derived from the VCC input. Bypass VTRM to GND with a 1F (min) low-ESR capacitor such as ceramic or plastic film types. System-Side Power-Supply Input. Connect to the system's logic-level power supply, 1.8V to 3.6V. USB Detector Output. A high at USB_DET signals to the ASIC that VCC is present. A low at USB_DET indicates that VCC is not present.
Detailed Description
The MAX3341E is a bidirectional level translator that converts single-ended or differential logic-level signals to differential USB signals, and converts differential USB signals to single-ended or differential logic-level signals. The MAX3341E includes an internal 1.5k pullup resistor that connects and disconnects D+ to VTRM (Functional Diagram). The MAX3341E is tolerant to power sequencing with either VCC > VL or VL > VCC. Additionally, the USB I/O, D+ and D-, and VCC are ESD protected to 15kV. The MAX3341E can receive USB power (VCC) directly from the USB connection, and
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operates with logic supplies (VL) down to 1.8V while still meeting the USB physical layer specifications. The MAX3341E supports full-speed (12Mbps) USB specification 2.0 operation. The MAX3341E has a unique enumerate feature that functions when power is applied. Driving ENUM low disconnects the internal 1.5k termination resistor from D+ enumerating the USB. This is useful if changes in communication protocol are required while power is applied, and while the USB cable is connected.
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15kV ESD-Protected USB Level Translator in UCSP with USB Detect
Device Control
D+ and DD+ and D- are the USB side transmitter I/O connections, and are ESD protected to 15kV using the Human Body Model, 15kV using IEC 1000-4-2 AirGap Discharge, and 8kV using IEC 1000-4-2 Contact Discharge, making the MAX3341E ideal for applications where a robust transmitter is required. A 23.7 resistor is required on D+ and D- for normal operation (see External Resistors). The MAX3341E contains unique circuitry to ensure the USB skew is independent of the input skew on VPO and VMO. Input skews of up to 10ns are ignored and do not show up on the output. ENUM USB specification 2.0 requires a 1.5k pullup resistor on D+ for full-speed (12Mbps) operation. Controlled by enumerate (ENUM), the MAX3341E provides this internal 1.5k resistor. Drive ENUM high to connect the pullup resistor from D+ to VTRM. Drive ENUM low to disconnect the pullup resistor from D+ to VTRM. VPO/VMO, VPI/VMI, and OE The MAX3341E system-side inputs are VPO and VMO. Data from an ASIC comes into the MAX3341E through VPO and VMO. VPO and VMO operate either differentially with VPO as the positive terminal and VMO as the negative terminal, or single ended with VPO as the data input (see MODE section). The MAX3341E system-side outputs are VPI, VMI, and RCV. The MAX3341E sends data to an ASIC through VPI, VMI, and RCV. VPI and VMI are outputs to the single-ended receivers and RCV is the output of the differential receiver. Output enable (OE) controls data transmission. Drive OE low to enable data transmission on D+ and D-. Drive OE high to disable data transmission or receive data. MODE MODE is a control input that selects whether differential or single-ended logic signals are recognized by the system side of the MAX3341E. Drive MODE high to select differential mode with VPO as the positive terminal and VMO as the negative terminal. Drive MODE low to select single-ended mode with VPO as the data input (Table 1). VTRM VTRM is the 3.3V output of the internal linear voltage regulator. VTRM powers the internal circuitry of the USB side of the MAX3341E. Connect a 1F (min) low-ESR ceramic or plastic capacitor from VTRM to GND, as close to VTRM as possible. VCC In most applications, VCC is derived from the USB 5V output. If supplying VCC with an alternative power supply such as a lithium-ion battery, the VCC input range is 4.0V to 5.5V. If VCC drops below 4.0V, supply current drops to 10A avoiding excessive battery drain, and D+/Denter a high-impedance state allowing other devices to drive the lines. Bypass VCC to GND with a 1F ceramic capacitor as close to the device as possible. USB Detect USB detect output (USB_DET) signals to the ASIC that VCC is present. A high at USB_DET indicates that VCC is present, while a low at USB_DET indicates that VCC is not present. SUSP Suspend (SUSP) is a control input. Force SUSP high to place the MAX3341E in a low-power state. In this state, the quiescent supply current into VCC is less than 50A and RCV goes low. In suspend mode, VPI and VMI remain active as receive outputs and VTRM stays on. The MAX3341E continues to receive data from the USB, allowing the P to sense activity on the D+/D- lines and wake up the MAX3341E. The MAX3341E can also transmit data to D+ and Dwhile in suspend mode. This function is used to signal a remote wakeup by driving a signal on D+ and D- for a period of 1ms to 15ms. Slew rate control is not active during suspend mode, and data can only be sent at data rates up to 200kps.
MAX3341E
Data Transfer
Receiving Data from the USB Data received from the USB are output to VPI/VMI in either of two ways, differentially or single ended. To receive data from the USB, force OE high and SUSP low. Differential data arriving at D+/D- appear as differential logic signals at VPI/VMI, and as a single-ended logic signal at RCV. If both D+ and D- are low, then VPI and VMI are low, signaling a single-ended zero condition on the bus; RCV is undefined (Table 1). Transmitting Data to the USB The MAX3341E outputs data to the USB differentially on D+ and D-. The logic driving signals may be either differential or single ended. For sending differential logic, force MODE high, force OE and SUSP low, and apply data to VPO and VMO. D+ then follows VPO, and Dfollows VMO. To send single-ended logic signals, force
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15kV ESD-Protected USB Level Translator in UCSP with USB Detect MAX3341E
Table 1a. Truth Table Transmit (SUSP = 0, OE = 0, ENUM = X)
INPUT MODE 0 0 0 0 1 1 1 1 VPO 0 0 1 1 0 0 1 1 VMO 0 1 0 1 0 1 0 1 D+ 0 0 1 0 0 0 1 1 D1 0 0 0 0 1 0 1 RCV 0 X 1 X X 0 1 X OUTPUT VPI 0 0 1 0 0 0 1 1 VMI 1 0 0 0 0 1 0 1 RESULT LOGIC 0 SE0 LOGIC 1 SE0 SE0 LOGIC 0 LOGIC 1 UNDEFINED
Table 1b. Truth Table Receive (SUSP = 0, OE = 1, ENUM = X)
INPUT D+ 0 0 1 1 D0 1 0 1 RCV X 0 1 X VPI 0 0 1 1 OUTPUT VMI 0 1 0 1 RESULT SE0 LOGIC 0 LOGIC 1 UNDEFINED
Table 1c. Truth Table Transmit in Suspend* (SUSP = 1, OE = 0, ENUM = X)
INPUT MODE 0 0 0 0 1 1 1 1 VPO 0 0 1 1 0 0 1 1 VMO 0 1 0 1 0 1 0 1 D+ 0 0 1 0 0 0 1 1 D1 0 0 0 0 1 0 1 RCV 0 0 0 0 0 0 0 0 OUTPUT VPI 0 0 1 0 0 0 1 1 VMI 1 0 0 0 0 1 0 1 RESULT LOGIC 0 SE0 LOGIC 1 SE0 SE0 LOGIC 0 LOGIC 1 UNDEFINED
*Timing specifications are not guaranteed for D+ and D-.
Table 1d. Truth Table Receive in Suspend* (SUSP = 1, OE = 1, MODE = X, VPO/VMO = X, ENUM = X)
INPUT D+ 0 0 1 1 D0 1 0 1 RCV 0 0 0 0 VPI 0 0 1 1 OUTPUT VMI 0 1 0 1 RESULT VPI/VMI ACTIVE VPI/VMI ACTIVE VPI/VMI ACTIVE VPI/VMI ACTIVE
*Timing specifications are not guaranteed for D+ and D-. 8 _______________________________________________________________________________________
15kV ESD-Protected USB Level Translator in UCSP with USB Detect
MODE, SUSP, and OE low, and apply data to VPO/VMO. When VMO is high, a single-ended zero condition is sent on the bus and RCV is undefined (Table 1).
MAX3341E
RC 1M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE
RD 1500 DISCHARGE RESISTANCE DEVICE UNDER TEST
ESD Protection
To protect the MAX3341E against ESD, D+ and Dhave extra protection against static electricity to protect the device up to 15kV. The ESD structures withstand high ESD in all states--normal operation, suspend, and powered down. In order for the 15kV ESD structures to work correctly, a 1F or greater capacitor must be connected from VTRM to GND. ESD protection can be tested in various ways; the D+ and D- input/output pins are characterized for protection to the following limits: 1) 15kV using the Human Body Model 2) 8kV using the IEC 1000-4-2 Contact Discharge method 3) 15kV using the IEC 1000-4-2 Air-Gap method ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 1a shows the Human Body Model, and Figure 1b shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5k resistor. IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits. The MAX3341E helps the user design equipment that meets level 4 of IEC 1000-4-2, without the need for additional ESD-protection components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is a higher peak current in IEC 1000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model. Figure 1c shows the IEC 1000-4-2 model. The Air-Gap Discharge test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized.
Cs 100pF
STORAGE CAPACITOR
Figure 1a. Human Body ESD Test Models
IP 100% 90% AMPERES 36.8% 10% 0 0 tRL TIME
Ir
PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE)
tDL CURRENT WAVEFORM
Figure 1b. Human Body Model Current Waveform
RC 50M TO 100M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE
RD 330 DISCHARGE RESISTANCE DEVICE UNDER TEST
Cs 150pF
STORAGE CAPACITOR
Figure 1c. IEC 1000-4-2 ESD Test Model
Machine Model The Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. Its objective is to emulate the stress caused by contact that
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15kV ESD-Protected USB Level Translator in UCSP with USB Detect MAX3341E
VL OE 0 tPZD tPDZ VL/2
occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing. Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports.
Applications Information
External Components
VOHD - 0.3V
D+/DVOLD + 0.3V
External Resistors Two external 23.7 1%, 1/2W resistors are required for USB connection. Place the resistors in between the MAX3341E and the USB connector on the D+ and Dlines. See Typical Operating Circuit. External Capacitors Use three external capacitors for proper operation. Use a 0.1F ceramic for decoupling VL, a 1F ceramic for decoupling VCC, and a 1.0F (min) ceramic or plastic filter capacitor on VTRM. Return all capacitors to GND.
Figure 2. Enable and Disable Timing, Transmitter
VL VPO 0 tPHLO 2V D+/D0.8V VL/2
UCSP Reliability
The UCSP represents a unique packaging form factor that may not perform equally to a packaged product through traditional mechanical reliability tests. CSP reliability is integrally linked to the user's assembly methods, circuit board material, and usage environment. The user should closely review these areas when considering use of a CSP package. Performance through Operating Life Test and Moisture Resistance remains uncompromised as it is primarily determined by the wafer-fabrication process. Mechanical stress performance is a greater consideration for a CSP package. CSPs are attached through direct solder contact to the user's PC board, foregoing the inherent stress relief of a packaged product lead frame. Solder joint contact integrity must be considered. Table 2 shows the testing done to characterize the CSP reliability performance. In conclusion, the UCSP is capable of performing reliably through environmental stresses as indicated by the results in Table 2. Additional usage data and recommendations are detailed in the UCSP application note, which can be found on Maxim's website at www.maxim-ic.com.
Figure 3. Mode 0 Timing
VL VPO/VMO 0 tPLH1 2V D+/D0.8V tPHL1 VL/2
Figure 4. Mode 1 Timing
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15kV ESD-Protected USB Level Translator in UCSP with USB Detect MAX3341E
D+ 3V
DtPHL(RCV) RCV tPLH(RCV)
0V
VL VL/2 0V tPHL(SE) tPLH(SE) VL VL/2 0V tPLH(SE) tPHL(SE) VL VL/2 0V D+/D- RISE/FALL TIMES 8ns, VL = 1.8V, 2.5V, 3.3V
VPI
VMI
Figure 5. D+/D- to RCV, VPI, VMI Propagation Delays
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15kV ESD-Protected USB Level Translator in UCSP with USB Detect MAX3341E
TEST POINT 3.3V D+ 1.5k CL 15k 25pF 23.7
MAX3341E
VMI OR VPI OR RCV
TEST POINT
MAX3341E
23.7 DCL
TEST POINT
(a) LOAD FOR VPI, VMI, AND RCV
15k
MAX3341E
24 D+ OR D-
TEST POINT 200
USB_DET 25pF
50pF
+ -
GND OR VCC
(b) LOAD FOR D+, D-, AND USB_DET
(c) LOAD FOR ENABLE AND DISABLE TIME, D+/D-
Figure 6. Test Circuits
Table 2. Reliability Test Data
TEST Temperature Cycle Operating Life Moisture Resistance Low-Temperature Storage Low-Temperature Operational Solderability ESD High-Temperature Operating Life CONDITIONS -35C to +85C, -40C to +100C TA = +70C +20C to +60C, 90% RH -20C -10C 8hr steam age 2000V, Human Body Model TJ = +150C DURATION 150 cycles, 900 cycles 240hr 240hr 240hr 24hr -- -- 168hr NO. OF FAILURES PER SAMPLE SIZE 0/10, 0/200 0/10 0/10 0/10 0/10 0/15 0/5 0/45
Chip Information
TRANSISTOR COUNT: 2162 PROCESS: BiCMOS
12
______________________________________________________________________________________
15kV ESD-Protected USB Level Translator in UCSP with USB Detect
Functional Diagram
USB SUPPLY VCC VL VTRM TO INTERNAL CIRCUITS LINEAR REGULATOR Vbg BANDGAP OE USB_DET ENUM
MAX3341E
MAX3341E
RCV GND SUSP TRANSMITTER VMO MODE VPO OE VMI USB_DET VPI SINGLE-ENDED RECEIVERS Vbg TO INTERNAL CIRCUITS D+ 23.7 D23.7 RECEIVER 1.5k
EXTERNAL RESISTORS
Pin Configurations
TOP VIEW
RCV 1 VPO MODE 2 3 16 USB_DET 15 VL 14 VTRM D VPO C VMO B OE A VPI VMI VCC GND SUSP ENUM DMODE USB_DET D+ RCV VL VTRM 1 2 3 4
BOTTOM VIEW
MAX3341E
VMO 4 OE 5 SUSP 6 VPI 7 VMI 8
MAX3341E
13 D+ 12 D11 GND 10 VCC 9 ENUM
TSSOP
UCSP
______________________________________________________________________________________
13
15kV ESD-Protected USB Level Translator in UCSP with USB Detect MAX3341E
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
4x4 UCSP.EPS
14
______________________________________________________________________________________
15kV ESD-Protected USB Level Translator in UCSP with USB Detect MAX3341E
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
TSSOP,NO PADS.EPS
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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