SN74HC164DR from Texas Instruments, in a SOIC-14-150mil. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	A	input	Gated Serial Input 1. AND-gated with input B to feed the first flip-flop; a low on either A or B inhibits new data entry and resets the first flip-flop low on the next CLK rising edge.
2	B	input	Gated Serial Input 2. AND-gated with input A to feed the first flip-flop; a low on either input inhibits new data entry.
3	QA	output	Parallel output, bit A (first stage of the 8-bit shift register). CMOS output rated for ±4 mA drive at 5 V.
4	QB	output	Parallel output, bit B (second stage of the shift register). CMOS output rated for ±4 mA drive at 5 V.
5	QC	output	Parallel output, bit C (third stage of the shift register). CMOS output rated for ±4 mA drive at 5 V.
6	QD	output	Parallel output, bit D (fourth stage of the shift register). CMOS output rated for ±4 mA drive at 5 V.
7	GND	power_in	Ground reference (0 V). Must be connected to the system ground.
8	CLK	input	Clock input. Data at the serial inputs is transferred into the shift register on the low-to-high transition of CLK. Max clock frequency 31 MHz at VCC=4.5 V.
9	CLR	input	Asynchronous clear, active-low. Driving CLR low forces all eight parallel outputs QA-QH low independent of the CLK and serial inputs.
10	QE	output	Parallel output, bit E (fifth stage of the shift register). CMOS output rated for ±4 mA drive at 5 V.
11	QF	output	Parallel output, bit F (sixth stage of the shift register). CMOS output rated for ±4 mA drive at 5 V.
12	QG	output	Parallel output, bit G (seventh stage of the shift register). CMOS output rated for ±4 mA drive at 5 V.
13	QH	output	Parallel output, bit H (eighth/last stage of the shift register). CMOS output rated for ±4 mA drive at 5 V; commonly used for daisy-chaining to the serial input of a downstream '164.
14	VCC	power_in	Positive supply, 2 V to 6 V (5 V nominal). Recommended 0.1 µF bypass capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-14-150mil
Category	Logic
Pins	14

Ordering variants

Same part, different packaging or reel option.

SN74HC164DR
SN74HC164DRNS
SN74HC164DRPW
SN74HC164DRJ
SN74HC164DRW
SN74HC164DRFK

CAD (KiCad official)

Symbol: SN74HC164DR
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14-150mil (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (38 pp, sha256 51860c45fddf000a, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF