SN54HC573A, SN74HC573A
OCTAL TRANSPARENT DTYPE LATCHES
WITH 3STATE OUTPUTS
SCLS147E DECEMBER 1982 REVISED SEPTEMBER 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Wide Operating Voltage Range of 2 V to 6 V
D High-Current 3-State Outputs Drive Bus
Lines Directly or Up To 15 LSTTL Loads
D Low Power Consumption, 80-A Max ICC
D Typical tpd = 21 ns
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 A Max
D Bus-Structured Pinout
32 1 20 19
910 11 1213
4
5
6
7
8
18
17
16
15
14
2Q
3Q
4Q
5Q
6Q
3D
4D
5D
6D
7D
2D
1D
OE
8Q
7Q
V
1Q
8D
GND
LE
SN54HC573A ...FK PACKAGE
(TOP VIEW)
CC
SN54HC573A ...J OR W PACKAGE
SN74HC573A . . . DB, DW, N, OR PW PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
1D
2D
3D
4D
5D
6D
7D
8D
GND
VCC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
LE
description/ordering information
These octal transparent D-type 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.
While the latch-enable (LE) input is high, the Q outputs respond to the data (D) inputs. When LE is low, the
outputs are latched to retain the data that was set up.
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
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP N
Tube of 25
SN74HC573AN
SOIC DW
Tube of 40
SN74HC573ADW
HC573A
40
°C to 85°C
SOIC DW
Reel of 2500
SN74HC573ADWR
HC573A
40
°C to 85°C
SSOP DB
Reel of 2000
SN74HC573ADBR
HC573A
TSSOP PW
Reel of 2000
SN74HC573APWR
HC573A
TSSOP PW
Reel of 250
SN74HC573APWT
HC573A
CDIP J
Tube of 25
SNJ54HC573AJ
55
°C to 125°C
CFP W
Tube of 150
SNJ54HC573AW
55 C to 125 C
LCCC FK
Tube of 55
SNJ54HC573AFK
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
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 MILPRF38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.