component
UC3637DW
Public Made by Adomby adom
Texas Instruments Motor Driver ICs, SOIC-20-300mil. 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
markdownUC3637DW
Texas Instruments · Motor Driver ICs · SOIC-20-300mil
UC3637DW from Texas Instruments, in a SOIC-20-300mil. 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 | +VTH | input | Sets the oscillator upper threshold voltage, buffered internally and also applied to ISET; input range is +VS-2 to -VS+2. |
| 2 | CT | passive | Oscillator timing capacitor connection that sets the triangle waveform frequency and amplitude with RT. |
| 3 | -VTH | input | Sets the oscillator lower threshold voltage. |
| 4 | AOUT | output | PWM output driver A, sources or sinks 100mA steady state and up to 500mA pulsed. |
| 5 | -VS | power_in | Negative supply, within the ±2.5V to ±20V supply range; RT may be referenced here. |
| 6 | +VS | power_in | Positive supply, within the ±2.5V to ±20V supply range; undervoltage lockout start threshold is measured here with respect to -VS. |
| 7 | BOUT | output | PWM output driver B, sources or sinks 100mA steady state and up to 500mA pulsed. |
| 8 | +BIN | input | Uncommitted non-inverting input of PWM comparator B. |
| 9 | -BIN | input | Uncommitted inverting input of PWM comparator B. |
| 10 | N/C | unconnected | No internal connection. |
| 11 | N/C | unconnected | No internal connection. |
| 12 | -AIN | input | Uncommitted inverting input of PWM comparator A. |
| 13 | +AIN | input | Uncommitted non-inverting input of PWM comparator A. |
| 14 | +C/L | input | Non-inverting current limit amplifier input with internal 200mV offset; common mode range is -VS to +VS-3V. |
| 15 | -C/L | input | Inverting current limit amplifier input for pulse-by-pulse current limiting. |
| 16 | SHUTDOWN | input | Shutdown input with 2.5V temperature compensated threshold; outputs are held low in shutdown and it can program an external undervoltage lockout. |
| 17 | +E/A | input | Non-inverting input of the error amplifier; common mode range is -VS+2V to +VS. |
| 18 | -E/A | input | Inverting input of the error amplifier. |
| 19 | E/A OUTPUT | output | Error amplifier output with 15V/µs slew rate; absolute maximum output current is ±20mA. |
| 20 | ISET | passive | Current set terminal for the oscillator, where RT develops the capacitor charging current from the buffered +VTH voltage; absolute maximum charging current is -2mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-20-300mil |
| Category | Power Supply Chip |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
UC3637DW - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files:
uc3637dw-etched.step/uc3637dw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uc3637dw.step/uc3637dw.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (19 pp, sha256
50b7541e6f18a862, retrieved 2026-10-11, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).