Datasheet

www.ti.com
FEATURES
DESCRIPTION/ORDERING INFORMATION
SN74ALVCH32244
32-BIT BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCES281D – OCTOBER 1999 – REVISED SEPTEMBER 2004
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• Member of the Texas Instruments Widebus+™
Family • ESD Protection Exceeds JESD 22
• Operates From 1.65 V to 3.6 V – 2000-V Human-Body Model (A114-A)
• Max t
pd
of 3 ns at 3.3 V – 200-V Machine Model (A115-A)
• ± 24-mA Output Drive at 3.3 V – 1000-V Charged-Device Model (C101)
• Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
This 32-bit buffer/driver is designed for 1.65-V to 3.6-V V
CC
operation.
The SN74ALVCH32244 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.
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.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors
with the bus-hold circuitry is not recommended.
ORDERING INFORMATION
T
A
PACKAGE
(1)
ORDERABLE PART NUMBER TOP-SIDE MARKING
LFBGA - GKE SN74ALVCH32244KR
-40 ° C to 85 ° C Tape and reel ACH244
LFBGA - ZKE (Pb-free) 74ALVCH32244ZKER
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
(each 4-bit buffer)
INPUTS
OUTPUT
Y
OE A
L H H
L L L
H X Z
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 © 1999–2004, 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.