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Texas Instruments SN74HC164NS — Logic ICs

SN74HC164NS 8-bit shift register, 74HC, 2V-6V, -40 to 125°C

MPNSN74HC164NS
End of Life

Texas Instruments SN74HC164NS, 74HC series, 8-bit serial-to-parallel shift register, push-pull output, 2V to 6V supply, -40°C to 125°C, 14-SOIC surface mount.

$1.2Ref. price · indicative, final on quote
Texas Instruments SN74HC164NS datasheet (PDF)
Packaging14-SOIC (0.209", 5.30mm Width)
RoHSROHS3 Compliant
Series74HC
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74HC164NS specifications
ParameterValue
Series74HC
Logic typeShift Register
Output typePush-Pull
MountingSurface Mount
Supply voltage2V ~ 6V
Operating temperature-40°C ~ 125°C
PackageTube
FunctionSerial to Parallel
Case14-SOIC (0.209\", 5.30mm Width)
Number of elements1
Number of bits per element8

Product details

What this 8-bit shift register does

The SN74HC164NS is an 8-bit serial-to-parallel shift register from TI's 74HC family. It takes serial data on one input line and, after eight clock pulses, presents the full 8-bit word on parallel outputs. The push-pull outputs can source or sink current directly, so you can drive LEDs or small relays without a buffer. The 74HC logic family means it runs from a 2V to 6V supply, making it compatible with both 3.3V and 5V systems.

Where you would use it

Typical applications include expanding the output pins of a microcontroller — think adding eight more outputs for controlling LEDs, seven-segment displays, or latching relays. The 14-SOIC package is a common footprint that fits on a standard 0.1-inch-pitch prototyping board with adapter.

For a BOM line, this part carries no last-time-buy risk.

Frequently asked questions

How does SN74HC164NS compare to SN74HC595?

Both are 8-bit serial-to-parallel shift registers, but the SN74HC595 adds a storage register with a separate latch clock, allowing the shift register to accept new data without disturbing the outputs. The SN74HC164NS updates its outputs directly on each clock pulse, so it is simpler but lacks the output-latch feature. If you need to update outputs synchronously without glitches, the SN74HC595 is the better fit.

Is the SN74HC164NS a serial to parallel shift register?

Yes, the SN74HC164NS is an 8-bit serial-to-parallel shift register. It converts a serial data stream into an 8-bit parallel output.