Datasheet

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DESCRIPTION/ORDERING INFORMATION
SN74ALVCH32245
32-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES282D – 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 noninverting bus transceiver is designed for 1.65-V to 3.6-V V
CC
operation.
The SN74ALVCH32245 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
effectively are isolated.
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 SN74ALVCH32245KR
-40 ° C to 85 ° C Tape and reel ACH245
LFBGA - ZKE (Pb-free) 74ALVCH32245ZKER
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
(each 8-bit section)
INPUTS
OPERATION
OE DIR
L L B data to A bus
L H A data to B bus
H X Isolation
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.