10ĆBIT BUSĆINTERFACE DĆTYPE LATCHES
WITH 3ĆSTATE OUTPUTS
SCBS024C − MARCH 1989 − REVISED NOVEMBER 1993
• State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
• ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
• Power-Up High-Impedance State
• Provides Extra Bus-Driving Latches
Necessary For Wider Address / Data Paths
or Buses With Parity
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic Chip
Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
SN54BCT29841 . . . JT OR W PACKAGE
SN74BCT29841 . . . DW OR NT PACKAGE
These 10-bit bus-interface latches feature 3-state
outputs designed specifically for driving highly
capacitive or relatively low-impedance loads.
They are particularly suitable for implementing
wider buffer registers, I/O ports, bidirectional bus
drivers with parity, and working registers.
The ten latches of the ′BCT29841 are transparent
D-type latches. When the latch-enable (LE) input
is high, the Q outputs will follow the data (D) inputs.
When LE is taken low, the Q outputs are latched
at the levels that were set up at the D inputs.
A buffered output-enable (OE) input can be used
to place the nine outputs in either a normal logic
state (high or low level) or a high-impedance state.
In the high-impedance state, the outputs neither
load nor drive the bus lines significantly. The
high-impedance state and increased drive provide
the capability to drive bus lines without need for
interface or pullup components.
SN54BCT29841 . . . FK PACKAGE
4 3 2 1 28 27 26
12 13 14 15 16 17 18
NC − No internal connection
The output enable (OE) does not affect the internal operation of the latches. Old data can be retained or new
data can be entered while the outputs are in the high-impedance state.
The SN54BCT29841 is characterized for operation over the full military temperature range of −55°C to 125°C.
The SN74BCT29841 is characterized for operation from 0°C to 70°C.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 1993, Texas Instruments Incorporated
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