SN54AHC594, SN74AHC594
8-BIT SHIFT REGISTERS
WITH OUTPUT REGISTERS
SCLS423C – JUNE 1998 – REVISED JANUARY 2000
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D EPIC (Enhanced-Performance
Implanted CMOS) Process
D Operating Range 2-V to 5.5-V VCC
D 8-Bit Serial-In, Parallel-Out Shift
Registers With Storage
D Independent Direct Overriding Clears
on Shift and Storage Registers
D Independent Clocks for Shift and
Storage Registers
D Latch-Up Performance Exceeds 100 mA
Per JESD 78, Class II
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
D Package Options Include Plastic
Small-Outline (D), Shrink Small-Outline
(DB), Thin Shrink Small-Outline (PW),
and Ceramic Flat (W) Packages,
Ceramic Chip Carriers (FK), and
Standard Plastic (N) and Ceramic (J)
DIPs
description
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
serial (QH′) output is provided for cascading
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.
The SN54AHC594 is characterized for operation over the full military temperature range of –55
°C to 125°C. The
SN74AHC594 is characterized for operation from –40
°C to 85°C.
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.
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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.
Copyright
2000, Texas Instruments Incorporated
SN54AHC594 ...J OR W PACKAGE
SN74AHC594 . . . D, DB, N, OR PW PACKAGE
(TOP VIEW)
SN54AHC594 . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
QB
QC
QD
QE
QF
QG
QH
GND
VCC
QA
SER
RCLR
RCLK
SRCLK
SRCLR
QH′
32 1 20 19
910 11 12 13
4
5
6
7
8
18
17
16
15
14
SER
RCLR
NC
RCLK
SRCLK
QD
QE
NC
QF
QG
Q
NC
SRCLR
H
GND
NC
C
Q
B
V
CC
Q
A
Q
H
Q
′
EPIC is a trademark of Texas Instruments Incorporated.