Datasheet
www.ti.com
FEATURES
DESCRIPTION/ORDERING INFORMATION
SN74LVC32244
32-BIT BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCES342C – 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
• Inputs Accept Voltages to 5.5 V
All Ports (5-V Input/Output Voltage With
• Max t
pd
of 4.1 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 buffer/driver is designed for 1.65-V to 3.6-V V
CC
operation.
The SN74LVC32244 is designed specifically to improve the performance and density of 3-state memory address
drivers, clock drivers, and bus-oriented receivers and transmitters.
The device can be used as eight 4-bit buffers, four 8-bit buffers, two 16-bit buffers, or one 32-bit buffer. It
provides true outputs and symmetrical active-low output-enable ( OE) inputs.
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 SN74LVC32244GKER
–40°C to 85°C Tape and reel NC244
LFBGA – ZKE (Pb-free) SN74LVC32244ZKER
(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.