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IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER WITH 3-STATE OUTPUTS AND 5 VOLT TOLERANT I/O
* * * * * * * *
IDT74LVC4245A
FEATURES:
0.5 MICRON CMOS Technology VCCA = 5V 0.5V VCCB = 2.7V to 3.6V CMOS power levels (0.4 W typ. static) Rail-to-rail output swing for increased noise margin All inputs, outputs, and I/O are 5V tolerant Supports hot insertion Available in SOIC, SSOP, QSOP, and TSSOP packages
DRIVE FEATURES:
* High Output Drivers: 24mA * Reduced system switching noise
The LVC4245A is manufactured using advanced dual metal CMOS technology. This octal noninverting bus transceiver contains two separate supply rails; B port has VCCB, which is set at 3.3V, and A port has VCCA, which is set at 5V. This allows for translation from a 3.3V to a 5V environment, and vice-versa. This device is ideal for asynchronous communication between two buses (A and B). The direction control pin (DIR) controls the direction of data flow. The output enable pin (OE) overrides the direction control and disables both ports. All inputs are designed with hysteresis for improved noise margin. The LVC4245A has been designed with a 24mA output driver. This driver is capable of driving a moderate to heavy load while maintaining speed performance.
DESCRIPTION:
APPLICATIONS:
* 5V and 3.3V mixed voltage systems * Data communication and telecommunication systems
FUNCTIONAL BLOCK DIAGRAM
DIR
2 22
OE
A1
3 21 4 20
B1
A2
B2
A3
5 19 6
B3
A4
5V Port
B4
A5
7 17 8 16
B5
A6
B6
A7
9 15 10
B7
A8
14
B8
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
(c) 2000 Integrated Device Technology, Inc.
3.3V Port
18
JULY 2000
DSC-4754/1
IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
(5V) VCCA DIR A1 A2 A3 A4 A5 A6 A7 A8 GND GND 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCCB (3.3V) VCCB (3.3V) OE B1 B2 B3 B4 B5 B6 B7 B8 GND
ABSOLUTE MAXIMUM RATINGS FOR VCCB OR VCCB(1)
Symbol VTERM TSTG IOUT IIK IOK ICC ISS Description Terminal Voltage with Respect to GND Storage Temperature DC Output Current Continuous Clamp Current, VI < 0 or VO < 0 Continuous Current through each VCC or GND Max -0.5 to +6.5 -65 to +150 -50 to +50 -50 100 Unit V C mA mA mA
NOTE: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
CAPACITANCE (TA = +25C, F = 1.0MHz)
Symbol CIN CI/O CI/O Parameter(1) Input Capacitance I/O Port Capacitance(2) Conditions VIN = 0V or VCCA VCCA = Open VOUT = VCCA or GND VCCA = 5V I/O Port Capacitance(3) VIN = VCCB or GND VCCB = 3.3V
NOTES: 1. As applicable to the device type. 2. For A port only. 3. For B port only.
Typ. 5 11 11
Max. -- -- --
Unit pF pF pF
SOIC/ SSOP/ QSOP/ TSSOP TOP VIEW
PIN DESCRIPTION
Pin Names OE DIR Ax Bx Description Output Enable Input (Active LOW) Direction Control Input Port A Inputs or 3-State Outputs Port B Inputs or 3-State Outputs
FUNCTION TABLE(1)
Inputs OE L L H
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care
DIR L H X
Outputs Bus B Data to Bus A Bus A Data to Bus B High Z state
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IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (A PORT)
Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = -40C to +85C, VCCA = 5V 0.5V(1)
Symbol VIH VIL IIH IIL IOZH IOZL VH ICCL ICCH ICCZ ICC High Impedance Output Current (3-State Output pins) Input Hysteresis Quiescent Power Supply Current VCCA = 5V VCCA = 5.5V VIN = GND or VCCA -- -- 100 -- -- 80 mV A VCCA = 5.5V VO = 0 to 5.5V -- -- 5 A Parameter Input HIGH Voltage Level Input LOW Voltage Level Input Leakage Current VCCA = 4.5V to 5.5V VCCA = 4.5V to 5.5V VCCA = 5.5V VI = 0 to 5.5V Test Conditions Min. 2 -- -- Typ.(2) -- -- -- Max. -- 0.8 1 Unit V V A
Quiescent Power Supply Current Variation
One input at 3.4V, other inputs at VCCA or GND VCCA = 4.5V to 5.5V
--
--
1.5
mA
NOTES: 1. VCCB = 2.7V to 3.6V. 2. Typical values are at VCCA = 5V, +25C ambient.
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE (B PORT)
Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = -40C to +85C, VCCB = 2.7V to 3.6V(1)
Symbol VIH VIL IOZH IOZL VH ICCL ICCH ICCZ ICC Parameter Input HIGH Voltage Level Input LOW Voltage Level High Impedance Output Current (3-State Output pins) Input Hysteresis Quiescent Power Supply Current VCCB = 3.3V VCCB = 3.6V VIN = GND or VCCB -- -- 100 -- -- 50 mV A VCCB = 2.7V to 3.6V VCCB = 2.7V to 3.6V VCCB = 3.6V VO = 0 to VCCB Test Conditions Min. 2 -- -- Typ.(2) -- -- -- Max. -- 0.8 5 Unit V V A
Quiescent Power Supply Current Variation
One input at VCCB - 0.6V, other inputs at VCCB or GND VCCB = 2.7V to 3.6V
--
--
500
A
NOTES: 1. VCCA = 5V 0.5V. 2. Typical values are at VCCB = 3.3V, +25C ambient.
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IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
OUTPUT DRIVE CHARACTERISTICS, VCCA = 5V 0.5V (A PORT)
Symbol VOH Parameter Output HIGH Voltage (B Port to A Port) VCCA = 4.5V VCCA = 5.5V VCCA = 4.5V VCCA = 5.5V VOL Output LOW Voltage (B Port to A Port) VCCA = 4.5V VCCA = 5.5V VCCA = 4.5V VCCA = 5.5V IOL = 24mA IOL = 0.1mA IOH = - 24mA Test Conditions(1) IOH = - 0.1mA Min. 4.3 5.3 3.7 4.7 -- -- -- -- Max. -- -- -- -- 0.2 0.2 0.55 0.55 V Unit V
NOTE: 1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range. TA = - 40C to + 85C, VCCB = 2.7V to 3.6V.
OUTPUT DRIVE CHARACTERISTICS, VCCB = 2.7V TO 3.6V (B PORT)
Symbol VOH Parameter Output HIGH Voltage (A Port to B Port) VCCB = 2.7V VCCB = 3V VCCB = 3V VOL Output LOW Voltage (A Port to B Port) VCCB = 2.7V to 3.6V VCCB = 2.7V VCCB = 3V IOH = - 24mA IOL = 0.1mA IOL = 12mA IOL = 24mA Test Conditions(1) VCCB = 2.7V to 3.6V IOH = - 0.1mA IOH = - 12mA Min. VCC - 0.2 2.2 2.4 2 -- -- -- Max. -- -- -- -- 0.2 0.4 0.55 V Unit V
NOTE: 1. VIH and VIL must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE table for the appropriate VCC range. TA = - 40C to + 85C, VCCA = 5V 0.5V.
OPERATING CHARACTERISTICS, TA = 25C
VCCA = 5V, VCCB = 3.3V Symbol CPD CPD Parameter Power Dissipation Capacitance per Transceiver Outputs enabled Power Dissipation Capacitance per Transceiver Outputs disabled Test Conditions CL = 0pF, f = 10Mhz Typical 39.5 5 Unit pF
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IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
SWITCHING CHARACTERISTICS(1)
VCCA = 5V 0.5V VCCB = 2.7V to 3.6V Symbol tPLH tPHL tPLH tPHL tPZL tPLZ tPZL tPLZ tPLZ tPHZ tPLZ tPHZ Parameter Propagation Delay Ax to Bx Propagation Delay Bx to Ax Output Enable Time OE to Bx Output Enable Time OE to Ax Output Disable Time OE to Bx Output Disable Time OE to Ax Min. 1 1 1 1 1 1 1 1 1 1 1 1 Max. 6.3 6.7 6.1 5 8.8 9.8 9 8.1 7.7 7.8 7 5.8 ns ns ns ns ns Unit ns
NOTE: 1. See TEST CIRCUITS AND WAVEFORMS. TA = - 40C to + 85C.
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IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
LOAD CIRCUIT AND VOLTAGE WAVEFORMS PARAMETER MEASUREMENT INFORMATION (A PORT) TEST CONDITIONS
500 From Output Under Test CL = 50pF (see Note A) 500 S1 2 x VCC Open GND
TEST tPLH / tPHL tPLZ / tPZL tPHZ / tPZH S1 Open 2 x VCC GND
Load Circuit
tW VCC Input 1.5V 1.5V 0V Output Control tPZL Output Waveform 1 S1 at 2 X VCC (see Note B) Output Waveform 2 S1 at GND (see Note B) VCC Input tPLH Output 50% VCC 50% VCC VOL 1.5V 1.5V 0V tPHL VOH tPLZ 50% VCC tPZH 50% VCC tPHZ 1.5V 1.5V
3V 0V
Voltage Waveforms Pulse Duration
VCC VOL+0.3V VOL VOH VOH-0.3V 0V
Voltage Waveforms Enable and Disable Times Low- and High-Level Enabling
Voltage Waveforms Propagation Delay Times Noninverting Outputs
NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control. C . All input pulses are supplied by generators having the following characteristics: PRR 10MHz; Zo = 50; tF 2.5ns; tR 2.5ns. D. The outputs are measured one at a time with one transition per measurement.
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IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
LOAD CIRCUIT AND VOLTAGE WAVEFORMS PARAMETER MEASUREMENT INFORMATION (B PORT) TEST CONDITIONS
500 From Output Under Test CL = 50pF (see Note A) 500 S1 7V Open GND
TEST tPLH / tPHL tPLZ / tPZL tPHZ / tPZH S1 Open 7V GND
Load Circuit
tW 3V Input 1.5V 1.5V 0V Output Control tPZL Output Waveform 1 S1 at 7V (see Note B) Output Waveform 2 S1 at GND (see Note B) 3V Input tPLH Output 1.5V 1.5V 1.5V 0V tPHL VOH 1.5V VOL tPZH 1.5V tPLZ 1.5V tPHZ 1.5V 1.5V
3V 0V
Voltage Waveforms Pulse Duration
3.5V VOL+0.3V VOL VOH VOH-0.3V 0V
Voltage Waveforms Enable and Disable Times Low- and High-Level Enabling
Voltage Waveforms Propagation Delay Times Noninverting Outputs
NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control. C . All input pulses are supplied by generators having the following characteristics: PRR 10MHz; Zo = 50; tF 2.5ns; tR 2.5ns. D. The outputs are measured one at a time with one transition per measurement.
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IDT74LVC4245A CMOS OCTAL BUS TRANSCEIVER AND 3.3V TO 5V SHIFTER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
X LVC IDT XX XXXX XX Temp. Range Bus-Hold Device Type Package
SO PY Q PG 4245A Blank 74
Small Outline IC (gull wing) Shrink Small Outline Package Quarter Size Small Outline Package Thin Shrink Small Outline Package Octal Bus Transceiver and 3.3V to 5V Shifter with 3-State Outputs, 24mA No Bus-hold -40C to +85C
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