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TC78H621FNG

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by adom

TOSHIBA Stepper Motor Driver, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TC78H621FNG

TOSHIBA · Stepper Motor Driver · TSSOP-16

TC78H621FNG from TOSHIBA, in a TSSOP-16. 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 NC unconnected Not connected; the datasheet says not to connect any pattern to this pin.
2 NC unconnected Not connected; the datasheet says not to connect any pattern to this pin.
3 PHA_A input Control input for A channel (1) that sets the phase of the A-channel bridge, per the input/output function table.
4 EN_A input Control input for A channel (2) that enables the A-channel bridge, per the input/output function table.
5 VCC power_in Power supply pin for the logic block, operating at 2.7 to 5.5 V.
6 /STBY input Standby input that places the IC in standby mode, per the input/output function table.
7 PHA_B input Control input for B channel (1) that sets the phase of the B-channel bridge, per the input/output function table.
8 EN_B input Control input for B channel (2) that enables the B-channel bridge, per the input/output function table.
9 VM power_in Power supply pin for the outputs, operating at 2.5 to 15.0 V.
10 BO2 output B phase (2) output pin, to be connected to the motor.
11 GND power_in Ground pin.
12 BO1 output B phase (1) output pin, to be connected to the motor.
13 AO2 output A phase (2) output pin, to be connected to the motor.
14 GND power_in Ground pin.
15 AO1 output A phase (1) output pin, to be connected to the motor.
16 GND power_in Ground pin.

Key specifications

Parameter Value
Manufacturer TOSHIBA
Package TSSOP-16
Category Motor Driver ICs
Pins 16

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Input voltage (EN_A, EN_B, PHA_A, PHA_B, /STBY) H level VIN(H) 2 5.5 V 6
Input voltage (EN_A, EN_B, PHA_A, PHA_B, /STBY) L level VIN(L) -0.2 0.8 V 6
Input current H level IIN(H) 11 16.5 22 μA VIN = 3.3 V 6
Input current L level IIN(L) 2 4 8 μA VIN = 0.8 V 6
Consumption current (stop mode) ICC1 0.5 1 mA /STBY = H, EN_A = EN_B = L 6
Consumption current (operation mode) ICC2 0.5 1 mA /STBY = EN_A = EN_B = H 6
Consumption current (standby mode) ICC3 0 1 μA /STBY = L 6
Motor current (stop mode) IM1 0.25 1 mA /STBY = H, EN_A = EN_B = L 6
Motor current (operation mode) IM2 0.25 1 mA /STBY = EN_A = EN_B = H 6
Motor current (standby mode) IM3 0 1 μA /STBY = L 6
Drain-source ON-resistance (sum of high side and low side) RON(U+L) 0.8 1.6 Ω IOUT = 0.2 A 6
Diode forward voltage (upper) VFU 1 1.2 V IOUT = 0.6 A 6
Diode forward voltage (lower) VFL 1 1.2 V 6
Output leakage current (upper) IOH 1 μA VM=15 V 6
Output leakage current (lower) IOL 1 μA 6
Controlled power supply voltage VCC 2.7 3.3 5.5 V 5
Motor power supply voltage VM 2.5 5 15 V 5
Output current IOUT 0.8 A 5
Input voltage VIN 5.5 V 5
Control logic frequency fPWM 1 500 kHz Duty50% condition (EN_A, EN_B, PHA_A, PHA_B) 5
Power supply voltage (logic) VCC 6 V 5
Power supply voltage (motor) VM 18 V 5
Output current IOUT 1.1 A 5
Input voltage VIN -0.2 V Upper limit printed as VCC+0.2 V 5
Power dissipation PD 0.78 W Mounted on single-side glass epoxy board (50 mm × 50 mm × 1.6 mm, Cu area 40 %, Cu thick 35 μm), Note 1 5
Operation temperature Topr -30 85 °C 5
Storage temperature Tstg -55 150 °C 5

CAD (KiCad official)

  • Symbol: TC78H621FNG
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)
  • 3D model files: tc78h621fng-etched.step / tc78h621fng-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tc78h621fng.step / tc78h621fng.glb are the bare package body.

Provenance

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

  • Datasheet: TOSHIBA datasheet (15 pp, sha256 cadca6ebcd1d021d, retrieved 2026-10-14, 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