# TMI8261

**TMI** · Motor Driver ICs · SOP-8

TMI8261 from TMI, in a SOP-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 | IN2 | input | Reverse-rotation logic input (high 1.5V-6V, low ≤1.2V, max frequency 50kHz). |
| 2 | IN1 | input | Forward-rotation logic input (high 1.5V-6V, low ≤1.2V, max frequency 50kHz). |
| 3 | GND | power_in | Ground reference. |
| 4 | VCC | power_in | Power supply input for the H-bridge, operating range 3V to 18V (abs max 25V), with bypass capacitors placed close to the pin. |
| 5 | OUT1 | output | H-bridge forward-rotation output, pins 5 and 6 are shorted together and carry up to 5.0A continuous. |
| 6 | OUT1 | output | H-bridge forward-rotation output, pins 5 and 6 are shorted together and carry up to 5.0A continuous. |
| 7 | OUT2 | output | H-bridge reverse-rotation output, pins 7 and 8 are shorted together and carry up to 5.0A continuous. |
| 8 | OUT2 | output | H-bridge reverse-rotation output, pins 7 and 8 are shorted together and carry up to 5.0A continuous. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TMI |
| Package | SOP-8 |
| Category | Power Supply Chip |
| 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 voltage | VCC | -0.3 |  | 25 | V |  | 2 |
| Output continuous current | IOUT | 0 |  | 5 | A |  | 2 |
| Input voltage IN1, IN2 | VIN_X | -0.3 |  |  | V | max printed as VCC | 2 |
| Operating ambient temperature | TOP | -25 |  | 85 | °C |  | 2 |
| Junction temperature (printed symbol Tstg) | Tstg | -40 |  | 150 | °C |  | 2 |
| Storage temperature (printed symbol TJ) | TJ | -55 |  | 150 | °C |  | 2 |
| Power dissipation | PD |  |  | 2 | W |  | 2 |
| Lead soldering temperature |  |  |  | 260 | °C | soldering 10s | 2 |
| ESD human body model | VESD | -2000 |  | 2000 | V | JEDEC JS-001 | 3 |
| Operating voltage range | VCC | 3 |  | 18 | V |  | 3 |
| Input signal voltage IN1, IN2 | VIN_X | -0.3 |  | 6 | V |  | 3 |
| Continuous output current | IOUT_X | 0 |  | 5 | A |  | 3 |
| Logic input frequency | FIN_X | 0 |  | 50 | kHz |  | 3 |
| Operating voltage | VVCC | 3 |  | 18 | V | TA = 25°C | 4 |
| Standby current | ISDT |  |  | 1 | μA | VCC=12V, IN1=IN2=0V, no load | 4 |
| Quiescent (brake) current | IBRAKE | 0.3 | 0.6 | 1 | mA | VCC=12V, IN1=IN2=5V or IN1=5V & IN2=0V or IN1=0V & IN2=5V, no load | 4 |
| PWM current | IPWM | 1 | 1.5 | 3 | mA | VCC=12V, IN1=5V, IN2=50kHz, no load | 4 |
| Undervoltage lockout | UVLO | 1.9 | 2.2 | 2.8 | V | VCC rising | 4 |
| Input high level | VINH | 1.5 |  | 6 | V |  | 4 |
| Input low level | VINL |  |  | 1.2 | V |  | 4 |
| Input high current | IINH |  | 50 | 100 | μA | VCC = 12V, VIN = 5V | 4 |
| Input low current | IINL |  |  | 1 | μA | VCC = 12V, VIN= 0V | 4 |
| On-resistance HS+LS | Rds(on) |  | 63 |  | mΩ | ILOAD=1A, HS+LS | 4 |
| On-resistance HS+LS | Rds(on) |  | 65 |  | mΩ | ILOAD=3A, HS+LS | 4 |
| Thermal shutdown temperature | TSD |  | 170 |  | °C | design guaranteed | 4 |
| Thermal shutdown hysteresis | THYS |  | 40 |  | °C | design guaranteed | 4 |
| Overcurrent protection current | IOCP |  | 12 |  | A |  | 4 |
| Overcurrent deglitch time | tOCP |  | 2.5 |  | μs |  | 4 |
| Overcurrent retry time | tRETRY |  | 2.4 |  | ms |  | 4 |

## CAD (KiCad official)

- Symbol: `TMI8261`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `tmi8261-etched.step` / `tmi8261-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tmi8261.step` / `tmi8261.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TMI datasheet](docs/tmi8261-datasheet.pdf) (10 pp, sha256 `58e215bc9243012b`, retrieved 2026-10-22, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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](docs/tmi8261-datasheet.pdf)