SN74LS165 8-Bit Parallel-In Serial-Out Shift Register DIP16
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Prices updated: 12 Oct 2026
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About this product
The SN74LS165 is an 8-bit parallel-load shift register in a 16-pin DIP package from the 74LS TTL family. It converts parallel inputs into a serial output, letting a microcontroller read several switches or sensors using only a few pins.
Specifications
- Function
- 8-bit parallel-in, serial-out shift register
- Logic family
- 74LS (TTL)
- Package
- DIP-16
- Supply voltage
- 4.75 V to 5.25 V (recommended)
- Serial output
- Q7 with complementary Q7̄
Frequently asked questions
How do I connect the SN74LS165 to a microcontroller?
Connect the clock, the shift/load control line and the serial output Q7 to the microcontroller, then clock out the 8 parallel inputs one bit at a time. Check the datasheet for the exact pin roles.
Can it be used with a 3.3 V microcontroller?
This is a 5 V TTL-family device. For 3.3 V boards, verify the input and output logic levels against the microcontroller's specifications and add level shifting if needed.
