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STLED316SMTR

Public Made by Adom

by adom

STMicroelectronics LED Drivers, SO-24-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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docs stled316smtr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
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stled316smtr-etched.glb stled316smtr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
stled316smtr-etched.step stled316smtr: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 3d ago
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STLED316SMTR

STMicroelectronics · LED Drivers · SO-24-300mil

STLED316SMTR from STMicroelectronics, in a SO-24-300mil. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 DIN/DOUT bidirectional Output serial data at falling edge of the shift clock, starting from lower bit; input serial data is clocked in at rising edge of the shift clock, starting from lower bit.
2 CLK input Serial clock input; reads serial data at rising edge and outputs data at falling edge.
3 STB input Strobe input to initialize serial interface; data input after falling edge of STB are processed as command.
4 IRQ_N output Interrupt output (active low) to interrupt the MCU when there is a key press.
5 DIG1_LED output Single output LED used together with the 8 segments to drive up to 8 discrete LEDs.
6 DIG2 output Digit 2 output pin; sources current to common anode.
7 DIG3 output Digit 3 output pin; sources current to common anode.
8 DIG4 output Digit 4 output pin; sources current to common anode.
9 VCC power_in 5.0 V ± 10% core main supply voltage; bypass to GND through 0.1 µF capacitor as close to the pin as possible.
10 DIG5 output Digit 5 output pin; sources current to common anode.
11 DIG6 output Digit 6 output pin; sources current to common anode.
12 DIG7 output Digit 7 output pin; sources current to common anode.
13 SEG8/KS8 output Segment 8 / Key scan 8 output pin (dual function as key source); sinks up to 40 mA from LED cathode.
14 SEG7/KS7 output Segment 7 / Key scan 7 output pin (dual function as key source); sinks up to 40 mA from LED cathode.
15 SEG6/KS6 output Segment 6 / Key scan 6 output pin (dual function as key source); sinks up to 40 mA from LED cathode.
16 SEG5/KS5 output Segment 5 / Key scan 5 output pin (dual function as key source); sinks up to 40 mA from LED cathode.
17 GND power_in Connect this pin to system GND (ground reference).
18 SEG4/KS4 output Segment 4 / Key scan 4 output pin (dual function as key source); sinks up to 40 mA from LED cathode.
19 SEG3/KS3 output Segment 3 / Key scan 3 output pin (dual function as key source); sinks up to 40 mA from LED cathode.
20 SEG2/KS2 output Segment 2 / Key scan 2 output pin (dual function as key source); sinks up to 40 mA from LED cathode.
21 SEG1/KS1 output Segment 1 / Key scan 1 output pin (dual function as key source); sinks up to 40 mA from LED cathode.
22 KEY2 input Key 2 input; input data from external keyboard are latched at end of the display cycle (maximum keyboard size is 8 x 2).
23 KEY1 input Key 1 input; input data from external keyboard are latched at end of the display cycle (maximum keyboard size is 8 x 2).
24 ISET input Segment current setting; connect to GND through a resistor to set the peak segment current up to 40 mA maximum.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SO-24-300mil
Category LED Drivers
Pins 24

CAD (KiCad official)

  • Symbol: STLED316SMTR
  • Footprint: Package_SO:SO-24_5.3x15mm_P1.27mm
  • 3D model: SO-24-300mil, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.75 mm nominal SOIC height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: stled316smtr-etched.step / stled316smtr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stled316smtr.step / stled316smtr.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (33 pp, sha256 fa3b5bab9ef1402b, retrieved 2026-10-01, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF