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TC642BEOA

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Microchip Tech Brushless DC (BLDC) Motor Driver, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TC642BEOA

Microchip Tech · Brushless DC (BLDC) Motor Driver · SOIC-8

TC642BEOA from Microchip Tech, in a SOIC-8. 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 VIN power_in Analog input where the thermistor or other voltage-output temperature sensor connects; 1.20V to 2.60V (typical) drives 0% to 100% VOUT duty cycle.
2 CF output Positive terminal of the PWM ramp generator timing capacitor; 1.0 µF is recommended for 30 Hz PWM operation.
3 VMIN input Analog input from an external resistor divider that sets minimum fan speed (1.20V to 2.60V typical = 0% to 100% minimum duty cycle), and pulling 0 ≤ VMIN ≤ VSHDN forces shutdown.
4 GND power_in Ground reference for the device.
5 SENSE input Analog input that detects fan current pulses across the sense resistor, with the absence of pulses indicating a fan fault condition (threshold 50 to 90 mV with respect to GND).
6 FAULT output Digital open-drain output that goes low on a fan fault (held until 16 pulses are detected at SENSE in a 32/f period) and, on the TC642B, when VIN reaches the 2.62V (typical) over-temperature threshold.
7 VOUT output Active-high complementary PWM output that drives an external NPN base resistor or N-channel MOSFET gate, and is held continuously on during a fan fault.
8 VDD power_in Supply input referenced to GND, specified at 3.0V to 5.5V, which may be independent of the fan supply.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOIC-8
Category Motor Driver ICs
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Current, Operating IDD 200 400 µA Pins 6, 7 Open, CF = 1 µF, VIN = VC(MAX) 3
Sink Current at VOUT Output IOL 1 mA VOL = 10% of VDD 3
Source Current at VOUT Output IOH 5 mA VOH = 80% of VDD 3
Input Voltage at VIN or VMIN for 100% PWM Duty Cycle VC(MAX) 2.45 2.6 2.75 V 3
VC(MAX) - VC(MIN) VC(SPAN) 1.3 1.4 1.5 V 3
VIN, VMIN Input Leakage IIN -1 1 µA Note 1 3
PWM Frequency fPWM 26 30 34 Hz CF = 1.0 µF 3
Supply Voltage VDD 3 5.5 V 3
Supply Voltage (absolute maximum) VDD 6 V 3
SENSE Input Threshold Voltage with Respect to GND VTH(SENSE) 50 70 90 mV 4
FAULT Output Low Voltage VOL 0.3 V IOL = 2.5 mA 4
Specified Temperature Range TA -40 85 °C 4
Operating Temperature Range TA -40 125 °C 4
Storage Temperature Range TA -65 150 °C 4
Maximum Junction Temperature TJ 150 °C 3
ESD Protection on all pins 3 kV Printed as > 3 kV 3
Thermal Package Resistance, 8-Pin SOIC θJA 155 °C/W 4

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin 8-Lead Plastic Small Outline (SN), Narrow, 150 mil (SOIC) Foot Angle f 048048 28

CAD (KiCad official)

  • Symbol: TC642BEOA
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: tc642beoa-etched.step / tc642beoa-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tc642beoa.step / tc642beoa.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (34 pp, sha256 0f0a557397754060, retrieved 2026-10-19, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (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