74HC164M from HGSEMI, in a SOIC-14. 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	Serial data input A. Internally ANDed with input B to feed the first stage of the shift register; sampled on the rising edge of CLOCK.
2	B	input	Serial data input B. Internally ANDed with input A to feed the first stage of the shift register; sampled on the rising edge of CLOCK.
3	QA	output	Parallel data output stage A (first stage of the shift register).
4	QB	output	Parallel data output stage B.
5	QC	output	Parallel data output stage C.
6	QD	output	Parallel data output stage D.
7	GND	power_in	Ground / power supply return (0 V reference).
8	CLOCK	input	Shift clock input. On each rising edge the eight register bits shift right one position and the A·B product is loaded into QA. Minimum pulse width 18 ns (typ).
9	CLEAR	input	Active-low asynchronous clear. Driving this pin low forces all outputs QA-QH to logic 0 regardless of CLOCK.
10	QE	output	Parallel data output stage E.
11	QF	output	Parallel data output stage F.
12	QG	output	Parallel data output stage G.
13	QH	output	Parallel data output stage H (last stage of the shift register; used as serial-out for cascading).
14	VCC	power_in	Positive supply, 2.0 V to 6.0 V (absolute max 6.5 V).

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOIC-14
Category	Logic
Pins	14

Ordering variants

Same part, different packaging or reel option.

74HC164MN
74HC164MM/TR
74HC164MMT/TR
74HC164MLQ/TR

CAD (KiCad official)

Symbol: 74HC164M
Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
3D model: SOIC-14 (KiCad packages3D, STEP)

Provenance

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

Datasheet: HGSEMI datasheet (8 pp, sha256 c4cbc1a54be27507, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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