component
STLED316SMTR
Public Made by Adomby adom
STMicroelectronics LED Drivers, SO-24-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSTLED316SMTR
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);stled316smtr.step/stled316smtr.glbare 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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).