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SCLS423F − JUNE 1998 − REVISED SEPTEMBER 2003
SN54AHC594 . . . J OR W PACKAGE
SN74AHC594 . . . D, DB, N, NS, OR PW PACKAGE
(TOP VIEW)
D
D
Operating Range 2-V to 5.5-V V
CC
8-Bit Serial-In, Parallel-Out Shift
Registers With Storage
Q
Q
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
D
D
D
D
Independent Direct Overriding Clears
on Shift and Storage Registers
B
Q
C
D
A
Q
SER
Independent Clocks for Shift and
Storage Registers
Q
RCLR
E
Q
12 RCLK
F
Latch-Up Performance Exceeds 100 mA
Per JESD 78, Class II
11
10
9
Q
SRCLK
SRCLR
G
Q
H
ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
GND
Q
H′
SN54AHC594 . . . FK PACKAGE
(TOP VIEW)
− 1000-V Charged-Device Model (C101)
description/ordering information
The ’AHC594 devices contain an 8-bit serial-in,
parallel-out shift register that feeds an 8-bit D-type
storage register. Separate clocks and direct
overriding clear (SRCLR, RCLR) inputs are
provided on the shift and storage registers. A
3
2
1
20 19
18
SER
RCLR
NC
Q
4
5
6
7
8
D
Q
17
16
E
NC
15 RCLK
14
9 10 11 12 13
Q
F
serial (Q ) output is provided for cascading
H′
SRCLK
Q
G
purposes.
The shift register (SRCLK) and storage register
(RCLK) clocks are positive-edge triggered. If the
clocks are tied together, the shift register always
is one clock pulse ahead of the storage register.
NC − No internal connection
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP − N
SOIC − D
Tube
SN74AHC594N
SN74AHC594N
Tube
SN74AHC594D
AHC594
Tape and reel
Tape and reel
Tape and reel
Tube
SN74AHC594DR
SN74AHC594NSR
SN74AHC594DBR
SN74AHC594PW
SN74AHC594PWR
SNJ54AHC594J
SNJ54AHC594W
SNJ54AHC594FK
−40°C to 85°C
SOP − NS
AHC594
HA594
SSOP − DB
TSSOP − PW
HA594
Tape and reel
Tube
CDIP − J
CFP − W
LCCC − FK
SNJ54AHC594J
SNJ54AHC594W
SNJ54AHC594FK
Tube
−55°C to 125°C
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
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1
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