SN54AHC573, SN74AHC573
OCTAL TRANSPARENT D TYPE LATCHES
WITH 3 STATE OUTPUTS
SCLS242K 鈭?OCTOBER 1995 鈭?REVISED JANUARY 2004
D
Operating Range 2-V to 5.5-V V
CC
D
3-State Outputs Directly Drive Bus Lines
D
Latch-Up Performance Exceeds 250 mA Per
JESD 17
SN54AHC573 . . . J OR W PACKAGE
SN74AHC573 . . . DB, DGV, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
description/ordering information
The 鈥橝HC573 devices are octal transparent
D-type latches designed for 2-V to 5.5-V V
CC
operation.
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.
OE
1D
2D
3D
4D
5D
6D
7D
8D
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
LE
SN54AHC573 . . . FK PACKAGE
(TOP VIEW)
2D
1D
OE
V
CC
3D
4D
5D
6D
7D
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
1Q
2Q
3Q
4Q
5Q
6Q
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.
ORDERING INFORMATION
TA
PDIP 鈭?N
SOIC 鈭?DW
鈭?0擄C to 85擄C
SOP 鈭?NS
SSOP 鈭?DB
TSSOP 鈭?PW
TVSOP 鈭?DGV
CDIP 鈭?J
鈭?5 C 125擄C
鈭?5擄C to 125 C
CFP 鈭?W
LCCC 鈭?FK
PACKAGE鈥?/div>
Tube
Tube
Tape and reel
Tape and reel
Tape and reel
Tube
Tape and reel
Tape and reel
Tube
Tube
Tube
ORDERABLE
PART NUMBER
SN74AHC573N
SN74AHC573DW
SN74AHC573DWR
SN74AHC573NSR
SN74AHC573DBR
SN74AHC573PW
SN74AHC573PWR
SN74AHC573DGVR
SNJ54AHC573J
SNJ54AHC573W
SNJ54AHC573FK
HA573
HA573
SNJ54AHC573J
SNJ54AHC573W
SNJ54AHC573FK
AHC573
AHC573
HA573
TOP-SIDE
MARKING
SN74AHC573N
鈥?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.
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.
Copyright
錚?/div>
2004, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
8D
GND
LE
8Q
7Q
1
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