STP16CP05TTR from STMicroelectronics, in a TSSOP-24. 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	GND	power_in	Ground terminal. All internal logic and current-sink return path. IGND max 1600 mA.
2	SDI	input	Serial data input terminal to the 16-bit shift register. CMOS logic input (VIH ≥ 0.7 VDD).
3	CLK	input	Clock input terminal for the shift register. Data on SDI is shifted on the rising edge. Max clock frequency 30 MHz in cascade operation.
4	LE/DM1	input	Latch enable input terminal. When high, transfers the shift register contents into the 16-bit data latch. Minimum pulse width 6 ns.
5	OUT0	output	Constant current sink output 0. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
6	OUT1	output	Constant current sink output 1. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
7	OUT2	output	Constant current sink output 2. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
8	OUT3	output	Constant current sink output 3. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
9	OUT4	output	Constant current sink output 4. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
10	OUT5	output	Constant current sink output 5. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
11	OUT6	output	Constant current sink output 6. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
12	OUT7	output	Constant current sink output 7. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
13	OUT8	output	Constant current sink output 8. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
14	OUT9	output	Constant current sink output 9. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
15	OUT10	output	Constant current sink output 10. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
16	OUT11	output	Constant current sink output 11. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
17	OUT12	output	Constant current sink output 12. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
18	OUT13	output	Constant current sink output 13. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
19	OUT14	output	Constant current sink output 14. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
20	OUT15	output	Constant current sink output 15. Programmable 5-100 mA via R-EXT, supports up to 20 V output driving.
21	OE/DM2	input	Output enable input, active low. When low, the 16 output current sinks are enabled; when high, all outputs are turned off. Minimum pulse width 100 ns.
22	SDO	output	Serial data output. Tap of the last (16th) shift-register stage; connect to SDI of the next device for cascading. IOH = -1 mA, IOL = 1 mA.
23	R-EXT	passive	External resistor terminal for constant current programming. A resistor from R-EXT to GND sets the output current for all 16 sinks (200 Ω → ~100 mA, 1 kΩ → ~20 mA, 4.2 kΩ → ~5 mA).
24	VDD	power_in	Supply voltage terminal. Operating range 3.0 V to 5.5 V (absolute max 7 V). Decouple to GND close to the device.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	TSSOP-24
Category	LED-drv
Pins	24

Ordering variants

Same part, different packaging or reel option.

STP16CP05TTR
STP16CP05TTRXTTR
STP16CP05TTRMTR
STP16CP05TTRPTR

CAD (KiCad official)

Symbol: STP16CP05TTR
Footprint: Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm
3D model: TSSOP-24 (KiCad packages3D, STEP)

Provenance

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

Datasheet: STMicroelectronics datasheet (30 pp, sha256 b53e1c3cd75b340c, 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