SN74HC594D from lingxingic, in a SOP-16. 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	Q1	output	Parallel data output bit 1 from the 8-bit storage register. Driven from the storage-register flip-flop, updated on the rising edge of STCP when STR is HIGH.
2	Q2	output	Parallel data output bit 2 from the 8-bit storage register.
3	Q3	output	Parallel data output bit 3 from the 8-bit storage register.
4	Q4	output	Parallel data output bit 4 from the 8-bit storage register.
5	Q5	output	Parallel data output bit 5 from the 8-bit storage register.
6	Q6	output	Parallel data output bit 6 from the 8-bit storage register.
7	Q7	output	Parallel data output bit 7 (MSB) from the 8-bit storage register.
8	GND	power_in	Ground reference (0 V) for the device.
9	Q7S	output	Serial data output from the last stage (stage 7) of the shift register. Used for cascading multiple 594 devices; drives the DS input of the next stage.
10	SHR	input	Shift-register asynchronous reset, active LOW. Clears all 8 shift-register flip-flops when driven LOW; does not affect the storage register.
11	SHCP	input	Shift-register clock input. Data on DS is loaded into shift-register stage 0 and existing data is advanced one stage on the LOW-to-HIGH transition.
12	STCP	input	Storage-register clock input. On the LOW-to-HIGH transition (with STR HIGH), the current shift-register contents are transferred in parallel into the storage register and driven onto Q0-Q7.
13	STR	input	Storage-register asynchronous reset, active LOW. Clears the 8-bit storage register (Q0-Q7 driven LOW) when driven LOW; does not affect the shift register.
14	DS	input	Serial data input. Sampled into shift-register stage 0 on the rising edge of SHCP.
15	Q0	output	Parallel data output bit 0 (LSB) from the 8-bit storage register.
16	VCC	power_in	Positive supply voltage. 2 V to 6 V for SN74HC594; 4.5 V to 5.5 V for SN74HCT594. Bypass locally with a 100 nF ceramic capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	lingxingic
Package	SOP-16
Category	Logic
Pins	16

Ordering variants

Same part, different packaging or reel option.

SN74HC594DD
SN74HC594DN
SN74HC594DPWR

CAD (KiCad official)

Symbol: SN74HC594D
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOP-16 (KiCad packages3D, STEP)

Provenance

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

Datasheet: lingxingic datasheet (23 pp, sha256 6701152582d6d4fa, retrieved 2026-08-17, tier: lcsc)
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