SN54AHCT594, SN74AHCT594
8-BIT SHIFT REGISTERS
WITH OUTPUT REGISTERS
SCLS417C – JUNE 1998 – REVISED JANUARY 2000
SN54AHCT594 . . . J OR W PACKAGE
SN74AHCT594 . . . D, DB, N, OR PW PACKAGE
(TOP VIEW)
EPIC (Enhanced-Performance
Implanted CMOS) Process
Inputs Are TTL-Voltage Compatible
Q
Q
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
8-Bit Serial-In, Parallel-Out Shift
Registers With Storage
B
Q
C
D
A
Q
SER
Independent Direct Overriding Clears
on Shift and Storage Registers
Q
RCLR
E
Q
12 RCLK
F
Independent Clocks for Both Shift and
Storage Registers
11
10
9
Q
SRCLK
SRCLR
G
Q
H
Latch-Up Performance Exceeds 100 mA
Per JESD 78, Class II
GND
Q
H′
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
SN54AHCT594 . . . FK PACKAGE
(TOP VIEW)
– 1000-V Charged-Device Model (C101)
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
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
SRCLK
Q
G
description
The ’AHCT594 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 both the shift and storage registers.
NC – No internal connection
A serial (Q ) output is provided for cascading
H′
purposes.
Both the shift register (SRCLK) and storage register (RCLK) clocks are positive edge triggered. If both clocks
are connected together, the shift register always is one count pulse ahead of the storage register.
The SN54AHCT594 is characterized for operation over the full military temperature range of –55°C to 125°C.
The SN74AHCT594 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.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright 2000, Texas Instruments Incorporated
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.
1
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