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Texas Instruments SN74HC165DRG3 — Logic ICs

SN74HC165DRG3 Shift Register, 8-bit, 16-SOIC, 2V-6V

MPNSN74HC165DRG3
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Texas Instruments 74HC series SN74HC165DRG3, 8-bit parallel-in/serial-out shift register, 2V to 6V supply, complementary output, -40°C to 125°C, 16-SOIC package.

$0.6000Ref. price · indicative, final on quote
Texas Instruments SN74HC165DRG3 datasheet (PDF)
Packaging16-SOIC (0.154", 3.90mm Width)
RoHSROHS3 Compliant
Series74HC
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SN74HC165DRG3 specifications
ParameterValue
Series74HC
Logic typeShift Register
Output typeComplementary
MountingSurface Mount
Supply voltage2V ~ 6V
Operating temperature-40°C~125°C
PackageTape & Reel (TR); Cut Tape (CT)
FunctionParallel or Serial to Serial
Case16-SOIC (0.154\", 3.90mm Width)
Number of elements1
Number of bits per element8

Product details

What this 8-bit shift register does on the board

The TI SN74HC165DRG3 is an 8-bit parallel-in/serial-out shift register from the 74HC family. It takes eight parallel input bits and clocks them out serially, one bit per clock pulse, with complementary outputs available. This is the standard part for adding extra digital inputs to a microcontroller without burning GPIO pins — think panel buttons, DIP switches, or encoder signals on a motor-drive board. A single element handles eight bits. The 16-SOIC package is a common footprint, easy to hand-solder or rework on a repair bench.

Frequently asked questions

Is SN74HC165DRG3 obsolete?

No.

Can I use SN74HC165DRG3 with a 5V supply?

Yes. The supply voltage range is 2 V to 6 V, so 5 V is right in the middle. The 74HC family logic thresholds are compatible with both 5 V CMOS and TTL levels.

How to cascade multiple SN74HC165?

Connect the serial output (Q7) of the first device to the serial input (DS) of the next. Tie all clock and load pins together. The cascade depth is limited only by the clock line drive and the microcontroller's shift-clock speed.