8-Bit Shift Registers
Description
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SN54HC595, SN74HC595
SCLS041I – DECEMBER 1982 – REVISED SEPTEMBER 2015
SNx4HC595 8-Bit Shift Registers With 3-State Output Registers
1 Features
•1 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 • Low Power Consumption: 80-μA (Maximum) ICC • tpd = 13 ns (Typical) • ±6-mA Output Drive at 5 V • Low Input Current: 1 μA (Maximum) • Shift Register Has Direct Clear • On Products Compliant to MIL-PRF-38535,
All Parameters Are Tested Unless Otherwise Noted.
On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.
2 Applications
• Network Switches • Power Infrastructure • LED Displays • Servers
3 Description
The SNx4HC595 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 3state 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SN54HC595
LCCC (20) CDIP (16)
8.
89 mm x 8.
89 mm 21.
34 mm x 6.
92 mm
PDIP (16)
19.
31 mm × 6.
35 mm
SOIC (16)
9.
90 mm x 3.
90 mm
SN74HC595
SOIC (16)
10.
30 mm x 7.
50 mm
SSOP (16)
6.
20 mm x 5.
30 mm
TSSOP (16)
5.
00 mm x 4.
40 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Logic Diagram (Positive Logic)
13 OE
12 RCLK
10 SRCLR
11 SRCLK
14 SER
1D C1
R
3R C3
3S
15 QA
2S 2R
C2 R
3R C3
3S
1 QB
2S 2R
C2 R
3R C3
3S
2 QC
2S 2R
C2 R
3R C3
3S
3 QD
2S 2R
C2 R
3R C3
3S
4 QE
2S 2R
C2 R
3R C3
3S
5 QF
2S 2R
C2 R
3R C3
3S
6 QG
2S 2R
C2 R
Pin numbers shown are for the D, DB, DW, J, N, N...
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