SN54HC594, SN74HC594
8BIT SHIFT REGISTERS
WITH OUTPUT REGISTERS
SCLS040F DECEMBER 1982 REVISED OCTOBER 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Wide Operating Voltage Range of 2 V to 6 V
D High-Current Outputs Can Drive Up To
15 LSTTL Loads
D Low Power Consumption, 80-A Max ICC
D Typical tpd = 15 ns
D ±6-mA Output Drive at 5 V
D Low Input Current of 1 A Max
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 Both Shift and
Storage Registers
SN54HC594 ...J OR W PACKAGE
SN74HC594 . . . D, DW, OR N PACKAGE
(TOP VIEW)
SN54HC594 . . . 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
′
description/ordering information
The ’HC594 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 (QH′) output is provided for cascading 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 parallel (QAQH) outputs have high-current capability. QH′ is a standard output.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP N
Tube of 25
SN74HC594N
Tube of 40
SN74HC594D
40
°C to 85°C
SOIC D
Reel of 2500
SN74HC594DR
HC594
40
°C to 85°C
SOIC D
Reel of 250
SN74HC594DT
HC594
SOIC DW
Tube of 40
SN74HC594DW
HC594
SOIC DW
Reel of 2000
SN74HC594DWR
HC594
CDIP J
Tube of 25
SNJ54HC594J
55
°C to 125°C
CFP W
Tube of 150
SNJ54HC594W
55 C to 125 C
LCCC FK
Tube of 55
SNJ54HC594FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Copyright
2003, 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.
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.