SN54HC594 Datasheet, PDF (1/9 Pages) Texas Instruments – 8-BIT SHIFT REGISTERS WITH OUTPUT REGISTERS

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
D High-Current Outputs Can Drive Up to
15 LSTTL Loads
D 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
description
SN54HC594, SN74HC594
8-BIT SHIFT REGISTERS
WITH OUTPUT REGISTERS
SCLS040C – DECEMBER 1982 – REVISED FEBRUARY 1998
SN54HC594 . . . J OR W PACKAGE
SN74HC594 . . . D, DB, OR N PACKAGE
(TOP VIEW)
Q_{B 1}
Q_C 2
Q_D 3
Q_E 4
Q_F 5
Q_G 6
Q_H 7
GND 8
16 ^V_CC
15 Q_A
14 SER
13 RCLR
12 RCLK
11 SRCLK
10 SRCLR
9 Q_H′
SN54HC594 . . . FK PACKAGE
(TOP VIEW)
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 (Q_H′) 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.
Q_D
3 2 1 20 19
4
18
SER
Q_E 5
17 RCLR
NC 6
16 NC
Q_F 7
15 RCLK
Q_G 8
14 SRCLK
9 10 11 12 13
NC – No internal connection
The parallel (Q_A–Q_H) outputs have high-current
capability. Q_H′ is a standard output.
The SN54HC594 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74HC594 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.
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.
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