SN54BCT373, SN74BCT373
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS016D – SEPTEMBER 1988 – REVISED MARCH 2003
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Operating Voltage Range of 4.5 V to 5.5 V
State-of-the-Art BiCMOS Design
Significantly Reduces I
CCZ
Full Parallel Access for Loading
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
SN54BCT373 ...FK PACKAGE
(TOP VIEW)
SN54BCT373 ...J OR W PACKAGE
SN74BCT373 . . . DB, DW, N, OR NS PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
1Q
1D
2D
2Q
3Q
3D
4D
4Q
GND
V
CC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
LE
3 2 1 20 19
910111213
4
5
6
7
8
18
17
16
15
14
8D
7D
7Q
6Q
6D
2D
2Q
3Q
3D
4D
1D
1Q
OE
5Q
5D
8Q
4Q
GND
LE
V
CC
description/ordering information
These 8-bit latches feature 3-state outputs designed specifically for driving highly capacitive or relatively
low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional
bus drivers, and working registers.
The eight latches of the ’BCT373 devices are transparent D-type latches. While the latch-enable (LE) input is
high, the Q outputs follow the data (D) inputs. When the latch enable is taken low, the Q outputs are latched
at the logic levels that were set up at the D inputs.
A buffered output-enable (OE
) input can be used to place the eight outputs in either a normal logic state (high
or low logic levels) or the 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 interface or pullup components.
ORDERING INFORMATION
T
A
PACKAGE
†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – N Tube SN74BCT373N SN74BCT373N
Tube SN74BCT373DW
0°C to 70°C
–
Tape and reel SN74BCT373DWR
SOP – NS Tape and reel SN74BCT373NSR BCT373
SSOP – DB Tape and reel SN74BCT373DBR BT373
CDIP – J Tube SNJ54BCT373J SNJ54BCT373J
–55°C to 125°C
CFP – W Tube SNJ54BCT373W SNJ54BCT373W
LCCC – FK Tube SNJ54BCT373FK SNJ54BCT373FK
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Copyright 2003, Texas Instruments Incorporated
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.
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.
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
