STPIC6C595TTR from STMicroelectronics, in a TSSOP-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	VCC	power_in	Logic supply voltage. Recommended 4.5 V to 5.5 V (absolute max 7 V).
2	SER IN	input	Serial data input to the 8-bit shift register. Data is clocked into the register on the rising edge of SRCK.
3	DRAIN0	output	Open-drain low-side DMOS output bit 0. Rated 33 V, 100 mA continuous / 250 mA peak, RDS(on) ~4 Ω typ.
4	DRAIN1	output	Open-drain low-side DMOS output bit 1. Rated 33 V, 100 mA continuous / 250 mA peak.
5	DRAIN2	output	Open-drain low-side DMOS output bit 2. Rated 33 V, 100 mA continuous / 250 mA peak.
6	DRAIN3	output	Open-drain low-side DMOS output bit 3. Rated 33 V, 100 mA continuous / 250 mA peak.
7	/CLR	input	Active-low shift register clear. When /CLR is low, the input shift register is cleared. Must be held high for normal shifting.
8	/G	input	Active-low output enable. When /G is high, all DMOS drain outputs are held off. When /G is low, storage register data is transparent to the output buffer.
9	SER OUT	output	Serial data output from the last stage of the shift register. Used to cascade multiple STPIC6C595 devices. CMOS-level output (VOH ≥ 4.4 V @ IOH = -20 µA).
10	RCK	input	Storage (latch) register clock. Rising edge transfers shift register contents to the 8-bit D-type storage (output) register.
11	DRAIN4	output	Open-drain low-side DMOS output bit 4. Rated 33 V, 100 mA continuous / 250 mA peak.
12	DRAIN5	output	Open-drain low-side DMOS output bit 5. Rated 33 V, 100 mA continuous / 250 mA peak.
13	DRAIN6	output	Open-drain low-side DMOS output bit 6. Rated 33 V, 100 mA continuous / 250 mA peak.
14	DRAIN7	output	Open-drain low-side DMOS output bit 7. Rated 33 V, 100 mA continuous / 250 mA peak.
15	SRCK	input	Shift register clock. Serial data on SER IN is shifted into the register on the rising edge of SRCK.
16	GND	power_in	Ground reference for logic and DMOS sources. Each power DMOS source is internally connected to GND.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	TSSOP-16
Category	Logic
Pins	16

Ordering variants

Same part, different packaging or reel option.

STPIC6C595TTR
STPIC6C595TTRMTR

CAD (KiCad official)

Symbol: STPIC6C595TTR
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`stpic6c595ttr.step`	205 KB	You want the bare part, or you mark your own boards.
`stpic6c595ttr-etched.step`	3.0 MB	You want the part with `STPIC6C595TTR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 732 faces against 255 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: STMicroelectronics datasheet (22 pp, sha256 eeea45d02275800c, 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