Serial-in shift registers with output registers - SN74LS595


Serial-in shift registers with output registers



These devices each 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 ('LS595) or open-collector ('LS596) outputs. Separate clocks are provided for both the shift register and the storage register. The shift register has a direct-overriding clear, serial input, and serial output pins for cascading.

Both the shift register and storage register clocks are positive-edge triggered. If the user wishes to connect both clocks together, the shift register state will always be one clock pulse ahead of the storage register.



  • 8-Bit Serial-In, Parallel-Out Shift Registers with Storage
  • Choice of 3-State ('LS595) or Open-Collector ('LS596) Parallel Outputs
  • Shift Register Has Direct Clear
  • Accurate Shift Frequency:DC to 20 MHz


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Other qualified versions of SN74LS595

Version Part Number Definition
Military SN54LS595 QML certified for Military and Defense Applications

Parametrics Compare all products in Shift Register

Technology Family
VCC (Min) (V)
VCC (Max) (V)
Voltage (Nom) (V)
F @ Nom Voltage (Max) (Mhz)
ICC @ Nom Voltage (Max) (mA)
tpd @ Nom Voltage (Max) (ns)
Output Drive (IOL/IOH) (Max) (mA)
3-State Output
Operating Temperature Range (C)
SN74LS595 SN54LS595
LS    LS   
4.75    4.75   
5.25    5.25   
5    5   
35    35   
65    65   
25    25   
24/-2.6    24/-2.6   
Yes    Yes   
Catalog    Military   
0 to 70    -55 to 125