SN54HC595
SN74HC595
www.ti.com
SCLS041H –DECEMBER 1982–REVISED NOVEMBER 2009
8-BIT SHIFT REGISTERS WITH 3-STATE OUTPUT REGISTERS
Check for Samples: SN54HC595 SN74HC595
1
FEATURES
SN54HC595...J OR W PACKAGE
SN74HC595...D, DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
•
•
•
8-Bit Serial-In, Parallel-Out Shift
Wide Operating Voltage Range of 2 V to 6 V
High-Current 3-State Outputs Can Drive Up To
15 LSTTL Loads
Q
Q
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
B
Q
C
D
A
•
•
•
•
•
Low Power Consumption: 80-μA (Max) ICC
tpd = 13 ns (Typ)
Q
SER
OE
Q
E
Q
Q
12 RCLK
F
±6-mA Output Drive at 5 V
11
10
9
SRCLK
SRCLR
G
Low Input Current: 1 μA (Max)
Shift Register Has Direct Clear
Q
H
GND
Q ′
H
DESCRIPTION
SN54HC595...FK PACKAGE
(TOP VIEW)
The 'HC595 devices 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) input, serial (SER)
input, and serial outputs for cascading. When the
output-enable (OE) input is high, the outputs are in
the high-impedance state.
3
2
1
2 0 1 9
18
SER
OE
Q
4
5
6
7
8
D
Q
17
16
E
NC
NC
15 RCLK
Q
F
14
9 10 11 12 1 3
Both the shift register clock (SRCLK) and storage
register clock (RCLK) are positive-edge triggered. If
both clocks are connected together, the shift register
always is one clock pulse ahead of the storage
register.
SRCLK
Q
G
NC – No internal connection
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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.
Copyright © 1982–2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.