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TC78H621FNG
Public Made by Adomby adom
TOSHIBA Stepper Motor Driver, TSSOP-16. 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
markdownTC78H621FNG
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tc78h621fng.step/tc78h621fng.glbare 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, primaryclaude-haiku-5-5(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).