Datasheet
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DESCRIPTION/ORDERING INFORMATION
SN74LVC32245
32-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES343D – OCTOBER 2000 – REVISED APRIL 2005
• Typical V
OHV
(Output V
OH
Undershoot) > 2 V at
V
CC
= 3.3 V, T
A
= 25°C
• Member of the Texas Instruments Widebus+™
Family • I
off
Supports Partial-Power-Down Mode
Operation
• Operates From 1.65 V to 3.6 V
• Supports Mixed-Mode Signal Operation on All
• Inputs Accept Voltages to 5.5 V
Ports (5-V Input/Output Voltage With
• Max t
pd
of 4 ns at 3.3 V
3.3-V V
CC
)
• Typical V
OLP
(Output Ground Bounce) < 0.8 V
at V
CC
= 3.3 V, T
A
= 25°C
This 32-bit noninverting bus transceiver is designed for 1.65-V to 3.6-V V
CC
operation.
The SN74LVC32245 is designed for asynchronous communication between data buses. The control-function
implementation minimizes external timing requirements.
This device can be used as four 8-bit transceivers, two 16-bit transceivers, or one 32-bit transceiver. It allows
data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the
direction-control (DIR) input. The output-enable ( OE) input can be used to disable the device so that the buses
are effectively isolated.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
This device is fully specified for partial-power-down applications using I
off
. The I
off
circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
To ensure the high-impedance state during power up or power down, OE should be tied to V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
T
A
PACKAGE
(1)
ORDERABLE PART NUMBER TOP-SIDE MARKING
LFBGA – GKE SN74LVC32245GKER
–40°C to 85°C Tape and reel NC245
LFBGA – ZKE (Pb-free) SN74LVC32245ZKER
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus+ is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000–2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.