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19-1931; Rev 0; 1/01
15kV ESD-Protected, 460kbps, RS-232 Transmitters in SOT23-6
General Description
The MAX3190/MAX3190E single RS-232 transmitters in a SOT23-6 package are for space- and cost-constrained applications requiring minimal RS-232 communications. These devices consume only 200A of supply current from 7.5V to 12V supplies. The MAX3190/MAX3190E transmitter outputs are RS-232 compatible when powered from 6V to 7.5V supplies. They feature a shutdown input that reduces current consumption to only 1A and forces the transmitter output into a high-impedance state. RS-232-compliant data transmission is guaranteed up to 460kbps. The MAX3190/MAX3190E are EIA/TIA-232 transmitters that convert CMOS/TTL logic levels to RS-232-compliant signals. The MAX3190E transmitter output is protected to 15kV per the Human Body Model, providing protection against harsh environments. The MAX3190/MAX3190E transmitters have a standard inverting output. o Small 6-Pin SOT23 Package o ESD-Protected RS-232 Output (MAX3190E) 15kV per Human Body Model o 200A Operating Supply Current o Shutdown Reduces Supply Current to 0.4A o RS-232-Compliant Operation from 7.5V to 12V Supplies o RS-232-Compatible Operations from 6V to 7.5V Supplies o 460kbps Guaranteed Data Rate o Three-State RS-232 Transmitter Output o No External Components
Features
MAX3190/MAX3190E
Applications
Set-Top Boxes Telecommunications Diagnostic Ports Networking Equipment Digital Cameras Hand-Held Equipment
PART MAX3190EUT-T MAX3190EEUT-T
Ordering Information
TEMP. RANGE -40C to +85C -40C to +85C PINPACKAGE 6 SOT23-6 6 SOT23-6 TOP MARK AAIA AAIB
Typical Operating Circuit
TOP VIEW
+5V +10V CBYPASS1 0.1F 1 6 SHDN VCC MAX3190 MAX3190E 3 TIN GND 2 CAPACITORS MAY BE POLARIZED OR UNPOLARIZED. TOUT 4 VEE 5 -10V CBYPASS2 0.1F SHDN 1
Pin Configuration
6
VCC
GND 2
MAX3190 MAX3190E
5
VEE
TIN 3
4
TOUT
SOT23-6
________________________________________________________________ Maxim Integrated Products
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15kV ESD-Protected, 460kbps, RS-232 Transmitters in SOT23-6 MAX3190/MAX3190E
ABSOLUTE MAXIMUM RATINGS
VCC to GND (Note 1) ...........................................-0.3V to +13.2V VEE to GND (Note 1)............................................+0.3V to -13.2V VCC to VEE (Note 1) .............................................................+22V TIN, SHDN to GND ...................................................-0.3V to +7V TOUT to GND (SHDN = GND)..........................................13.2V Output Short-Circuit to GND Duration........................Continuous Continuous Power Dissipation (TA = +70C) 6-Pin SOT23 (derate 8.7mW/C above +70C)..........691mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Note 1: VCC and VEE can have maximum magnitudes of 13.2V, but their absolute difference cannot exceed 22V.
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 = +7.5V to +12V, VEE = -7.5V to -12V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +10V, VEE = -10V, and TA = +25C.) (Note 2)
PARAMETER DC CHARACTERISTICS Positive Supply Voltage Negative Supply Voltage Positive Supply Current Negative Supply Current Shutdown Supply Current INPUT LOGIC (TIN, SHDN) Input Logic Threshold Low Input Logic Threshold High Input Leakage TIN Input Hysteresis TRANSMITTER OUTPUT Output Voltage Swing Output Resistance Output Short-Circuit Current Output Leakage Current TIMING CHARACTERISTICS Maximum Data Rate Transmitter Skew tTS RL = 3k, CL = 1000pF |tPHL - tPLH|, Figure 1 RL = 3k to 7k, CL = 300pF to 1000pF, measured from -3V to +3V or +3V to -3V, VCC = +10V, VEE = -10V, TA = +25C tEN 460 100 kbps ns ITOUT VTOUT = 12V; V CC = 0 or VCC = +10V, VEE = -10V; SHDN = GND VTOUT RTOUT VCC = 7.5V, VEE = -7.5V, RL = 3k VCC = 6V, VEE = -6V, RL = 3k VCC = VEE = 0, VTOUT = 2V 5 3.7 300 35 +60 100 V V mA A VIL VIH 2.4 0.01 100 1 0.8 V V A mV VCC VEE ICC IEE V SHDN = +5V V SHDN = +5V V SHDN = 0 -125 0.4 10 7.5 -12 12 -7.5 250 V V A A A SYMBOL CONDITIONS MIN TYP MAX UNITS
Transition-Region Slew Rate
6
30
V/s s
Transmitter Enable Time
2
2
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15kV ESD-Protected, 460kbps, RS-232 Transmitters in SOT23-6
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +7.5V to +12V, VEE = -7.5V to -12V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +10V, VEE = -10V, and TA = +25C.) (Note 2)
PARAMETER ESD PROTECTION (MAX3190E) TOUT Human Body Model 15 kV SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX3190/MAX3190E
Note 2: All devices are 100% tested at TA = +25C. All limits over temperature are guaranteed by design.
Typical Operating Characteristics
(VCC = +10V, VEE = -10V, RL = 3k, TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. OUTPUT CAPACITANCE
MAX3190/90E toc01
SLEW RATE vs. OUTPUT CAPACITANCE
35 30 SLEW RATE (V/s) 25 20 15 10 FALLING EDGE RISING EDGE
MAX3190/90E toc02
6 460kbps 5 SUPPLY CURRENT (mA) 4 3 2 1 0 0 500 1000 1500 2000 20kbps 250kbps 125kbps
40
5 0 2500 0 400 800 1200 1600 2000 OUTPUT CAPACITANCE (pF) CAPACITANCE (pF)
TRANSMITTER OUTPUT SHUTDOWN WAVEFORM
MAX3190/90E toc03
TRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
12 10 8 6 4 2 0 -2 -4 -6 -8 -10 -12 6 VEE = -VCC, 460kbps
MAX3190/90E toc04
5V SHDN 0 TOUT VOLTAGE (V) +10V
POSITIVE
TOUT
0
NEGATIVE
-10V
1.0s/div
7
8
9
10
11
12
SUPPLY VOLTAGE (V)
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15kV ESD-Protected, 460kbps, RS-232 Transmitters in SOT23-6 MAX3190/MAX3190E
Pin Description
PIN 1 2 3 4 5 6 NAME SHDN GND TIN TOUT VEE VCC FUNCTION Active-Low Shutdown. Pull low to reduce the supply current and to force TOUT into a high-impedance state. Ground TTL/CMOS Transmitter Input RS-232 Transmitter Output Negative Supply Voltage Positive Supply Voltage Figure 1. Transmitter Propagation-Delay Timing
TIN VIL +10V TOUT -10V tPLH tPHL VIH 50% 50% 50% 50%
Detailed Description
The MAX3190/MAX3190E are EIA/TIA-232 transmitters that convert CMOS/TTL logic levels to RS-232 signals. They operate on 7.5V to 12V supplies and feature enhanced electrostatic discharge protection (see ESD Protection). The MAX3190/MAX3190E guarantee a 460kbps data rate with worst-case loads of 3k in parallel with 1000pF. The MAX3190/MAX3190E invert the TOUT signal relative to TIN (standard RS-232). The transmitter input does not have a pullup resistor and should be connected to GND if unused.
Power-Supply Decoupling
In most circumstances, 0.1F bypass capacitors are adequate for power-supply decoupling. Connect the bypass capacitors as close to the IC as possible.
Applications Information
Power-Supply Sources
The MAX3190/MAX3190E require 7.5V to 12V dual supplies. For applications where these supply voltages are not present, a DC-DC converter must be added. Due to the MAX3190/MAX3190E's low current consumption, a charge pump can provide the proper supply voltages and requires a minimal amount of board space and cost. When using another RS-232 device containing an internal unregulated charge pump (Tables 1 and 2), the MAX3190/MAX3190E may be powered from the internal charge pump (Figure 4). This eliminates the need for
RC 1M CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE RD 1500 DISCHARGE RESISTANCE DEVICE UNDER TEST
Shutdown
The MAX3190/MAX3190E feature a shutdown input. Drive SHDN low to reduce the supply current to 1A (max). Shutdown also forces TOUT into a high-impedance state, allowing the signal line to be safely controlled by other transmitters. Drive SHDN high for normal operation.
ESD Protection
As with all Maxim devices, ESD protection structures are incorporated on all pins to protect against ESD encountered during handling and assembly. The MAX3190E's transmitter output has extra protection against static electricity. Maxim has developed state-of-the-art structures enabling this pin to withstand ESD up to 15kV without damage or latch-up. The MAX3190E's transmitter output is characterized for protection to 15kV using the Human Body Model.
Cs 100pF
STORAGE CAPACITOR
Human Body Model
Figure 2 shows the Human Body Model, and Figure 3 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, and then discharged into the test device through a 1.5k resistor.
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Figure 2. Human Body ESD Test Model
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15kV ESD-Protected, 460kbps, RS-232 Transmitters in SOT23-6 MAX3190/MAX3190E
IP 100% 90% AMPERES 36.8% 10% 0 0 tRI TIME
Ir
PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE)
tDL CURRENT WAVEFORM
Figure 3. Human Body Model Current Waveform
+5V SUPPLY CBYPASS 0.1F C3 0.1F V+ VC4 0.1F VCC VEE MAX3190 MAX3190E SHDN +5V
VCC C1+
C1 C1C2+ C2 C2TIN MAX_ _ _ _* TOUT
GND * FOR MAXIM PART NUMBER, SEE TABLES 1 AND 2.
GND
Figure 4. Powering the MAX3190/MAX3190E
additional external DC-DC converters to generate the required 7.5V to 12V dual supplies. The MAX3190/ MAX3190E are specifically designed to be used with Maxim's RS-232 products listed in Tables 1 and 2. Competitive RS-232 devices' charge pumps typically do not have the capability to power these devices.
The MAX3190/MAX3190E can be operated from 6V to 7.5V supplies. In this condition, the devices are guaranteed to be RS-232-compatible (TOUT +3.7V). For applications that have 4.5V to 6V supplies available, please refer to the MAX3188/MAX3189 or MAX3188E/MAX3189E data sheet.
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15kV ESD-Protected, 460kbps, RS-232 Transmitters in SOT23-6 MAX3190/MAX3190E
Table 1. RS-232 Devices with Internal Unregulated Charge Pumps of 10V (typical)
PART NUMBER MAX200 MAX201 MAX202 MAX203 MAX204 MAX205 MAX206 MAX207 MAX208 MAX209 MAX211 MAX213 MAX220 MAX221 MAX222 MAX223 MAX225 MAX230 MAX231 MAX232 MAX232A MAX233A MAX233 MAX234 MAX235 MAX236 MAX237 MAX238 MAX239 MAX240 MAX241 MAX242 MAX243 MAX244 MAX248 MAX249 NO. OF TX/RX 5/0 2/2 2/2 2/2 4/0 5/5 4/3 5/3 4/4 3/5 4/5 4/5 2/2 1/1 2/2 4/5 5/5 5/0 2/2 2/2 2/2 2/2 2/2 4/0 5/5 4/3 5/3 4/4 3/5 5/5 4/5 2/2 2/2 8/10 8/8 6/10 DATA RATE (kbps) 120 120 64 120 120 120 120 120 120 120 120 120 120 250 200 120 120 120 120 120 200 200 120 120 120 120 120 120 120 120 120 200 200 120 120 120
Table 2. 15kV ESD-Protected RS-232 Devices with Internal Unregulated Charge Pumps of 10V (typical)
PART NUMBER MAX202E MAX203E MAX205E MAX206E MAX207E MAX208E MAX211E MAX213E MAX221E MAX241E NO. OF TX/RX 2/2 2/2 5/5 4/3 5/3 4/4 4/5 4/5 1/1 4/5 DATA RATE (kbps) 64 120 120 120 120 120 120 120 250 120
Chip Information
TRANSISTOR COUNT: 75 PROCESS: CMOS
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15kV ESD-Protected, 460kbps, RS-232 Transmitters in SOT23-6
Package Information
6LSOT.EPS
MAX3190/MAX3190E
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 _____________________7 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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