SN54HC594, SN74HC594
8-BIT SHIFT REGISTERS
WITH OUTPUT REGISTERS
SCLS040C 鈥?DECEMBER 1982 鈥?REVISED FEBRUARY 1998
D
D
D
D
D
8-Bit Serial-In, Parallel-Out Shift Registers
With Storage
Independent Direct Overriding Clears on
Shift and Storage Registers
Independent Clocks for Both Shift and
Storage Registers
High-Current Outputs Can Drive Up to
15 LSTTL Loads
Package Options Include Plastic
Small-Outline (D), Shrink Small-Outline
(DB), and Ceramic Flat (W) Packages,
Ceramic Chip Carriers (FK), and Standard
Plastic (N) and Ceramic (J) 300-mil DIPs
SN54HC594 . . . J OR W PACKAGE
SN74HC594 . . . D, DB, OR N PACKAGE
(TOP VIEW)
Q
B
Q
C
Q
D
Q
E
Q
F
Q
G
Q
H
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
Q
A
SER
RCLR
RCLK
SRCLK
SRCLR
Q
H鈥?/div>
SN54HC594 . . . FK PACKAGE
(TOP VIEW)
The 鈥橦C594 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 (RCLR, SRCLR) inputs are
provided on both the shift and storage registers.
A serial (Q
H鈥?/div>
) output is provided for cascading
purposes.
Both the shift register (RCLK) and storage register
(SRCLK) clocks are positive edge triggered. If
both clocks are connected together, the shift
register is always one count pulse ahead of the
storage register.
The parallel (Q
A
鈥換
H
) outputs have high-current
capability. Q
H鈥?/div>
is a standard output.
Q
D
Q
E
NC
Q
F
Q
G
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
NC
V
CC
Q
A
SER
RCLR
NC
RCLK
SRCLK
SRCLR
description
Q
C
Q
B
Q
H
NC 鈥?No internal connection
The SN54HC594 is characterized for operation over the full military temperature range of 鈥?5擄C to 125擄C. The
SN74HC594 is characterized for operation from 鈥?0擄C to 85擄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.
POST OFFICE BOX 655303
Copyright
漏
1998, Texas Instruments Incorporated
鈥?/div>
DALLAS, TEXAS 75265
GND
NC
Q
H
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