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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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   

Other qualified versions of SN74LS595

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