SN54AHCT373, SN74AHCT373
OCTAL TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCLS239M – OCTOBER 1995 – REVISED JULY 2003
Inputs Are TTL-Voltage Compatible
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
Latch-Up Performance Exceeds 250 mA Per
JESD 17
– 1000-V Charged-Device Model (C101)
SN54AHCT373 . . . J OR W PACKAGE
SN74AHCT373 . . . DB, DGV, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
SN54AHCT373 . . . FK 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
V
CC
3
2
1 20 19
18
8Q
8D
7D
7Q
6Q
6D
5D
5Q
LE
2D
2Q
3Q
3D
4D
8D
7D
7Q
6Q
4
5
6
7
8
17
16
15
14 6D
9 10 11 12 13
GND
description/ordering information
The ’AHCT373 devices are octal-transparent D-type latches. When the latch-enable (LE) input is high, the Q
outputs follow the data (D) inputs. When LE is low, the Q outputs are latched at the logic levels of 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) 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.
OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered
while the outputs are in the high-impedance state.
To ensure the high-impedance state during power up or power down, OE should be tied to V through a pullup
CC
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP – N
Tube
SN74AHCT373N
SN74AHCT373N
Tube
SN74AHCT373DW
SN74AHCT373DWR
SN74AHCT373NSR
SN74AHCT373DBR
SN74AHCT373PW
SN74AHCT373PWR
SOIC – DW
AHCT373
Tape and reel
Tape and reel
Tape and reel
Tube
SOP – NS
AHCT373
HB373
–40°C to 85°C
SSOP – DB
TSSOP – PW
HB373
Tape and reel
Tape and reel
Tube
TVSOP – DGV
CDIP – J
SN74AHCT373DGVR HB373
SNJ54AHCT373J
SNJ54AHCT373W
SNJ54AHCT373FK
SNJ54AHCT373J
–55°C to 125°C
CFP – W
Tube
SNJ54AHCT373W
SNJ54AHCT373FK
LCCC – FK
Tube
†
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.
Copyright 2003, Texas Instruments Incorporated
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.
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.
1
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