TEXAS INSTRUMENTS SN54HC595, SN74HC595 Technical data
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SN54HC595, SN74HC595
8-BIT SHIFT REGISTERS
WITH 3-STATE OUTPUT REGISTERS
SCLS041B – DECEMBER 1982 – REVISED MA Y 1997
D
8-Bit Serial-In, Parallel-Out Shift
D
High-Current 3-State Outputs Can Drive up
to 15 LSTTL Loads
D
Shift Register Has Direct Clear
D
Package Options Include Plastic
Small-Outline (D) and Ceramic Flat (W)
Packages, Ceramic Chip Carriers (FK), and
Standard Plastic (N) and Ceramic (J)
300-mil DIPs
description
The ’HC595 contain an 8-bit serial-in, parallel-out
shift register that feeds an 8-bit D-type storage
register. The storage register has parallel 3-state
outputs. Separate clocks are provided for both the
shift and storage register. The shift register has a
direct overriding clear (SRCLR
(SER) input, and serial outputs for cascading.
Both the shift register clock (RCLK) and storage
register clock (SRCLK) are positive-edge triggered. If both clocks are connected together, the
shift register is always one clock pulse ahead of
the storage register.
The SN54HC595 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74HC595 is characterized for
operation from –40°C to 85°C.
) input, serial
SN54HC595 ...J OR W PACKAGE
SN74HC595 ...D OR N PACKAGE
SN54HC595 . . . FK PACKAGE
Q
D
Q
E
NC
Q
F
Q
G
(TOP VIEW)
Q
1
B
Q
2
C
Q
3
D
Q
4
E
5
Q
F
6
Q
G
7
Q
H
GND
8
(TOP VIEW)
CQB
Q
3212019
4
5
6
7
8
910111213
H
Q
NC
GND
NC
16
15
14
13
12
11
10
9
VCCQ
′
H
Q
V
CC
Q
A
SER
OE
RCLK
SRCLK
SRCLR
Q
H′
A
SER
18
OE
17
NC
16
RCLK
15
14
SRCLK
SRCLR
NC – No internal connection
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.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1997, Texas Instruments Incorporated
1
SN54HC595, SN74HC595
8-BIT SHIFT REGISTERS
WITH 3-STATE OUTPUT REGISTERS
SCLS041B – DECEMBER 1982 – REVISED MA Y 1997
logic symbol
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, J, N, and W packages.
†
13
OE
SER
12
10
11
14
RCLK C2
SRCLR
SRCLK
EN3
R
1D
SRG8
C1/
2D
2D
15
3
3
Q
A
1
Q
B
2
Q
C
3
Q
D
4
Q
E
5
Q
F
6
Q
G
7
Q
H
9
Q
H′
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
13
OE
SER
12
10
11
14
RCLK
SRCLR
SRCLK
1D
R
C1
SN54HC595, SN74HC595
8-BIT SHIFT REGISTERS
WITH 3-STATE OUTPUT REGISTERS
SCLS041B – DECEMBER 1982 – REVISED MA Y 1997
3R
C3
3S
15
Q
A
2S
2R
R
2S
2R
R
2S
2R
R
2S
2R
R
2S
2R
R
C2
C2
C2
C2
C2
3R
3S
3R
3S
3R
3S
3R
3S
3R
3S
C3
C3
C3
C3
C3
1
Q
B
2
Q
C
3
Q
D
4
Q
E
5
Q
F
Pin numbers shown are for the D, J, N, and W packages.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2S
2R
R
2S
2R
R
C2
C2
3R
3S
3R
3S
C3
C3
6
Q
G
7
Q
H
9
Q
H′
3
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