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TMI8120
Public Made by Adomby adom
TMI Stepper Motor Driver, QFN-20-EP(3x3). 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
markdownTMI8120
TMI · Stepper Motor Driver · QFN-20-EP(3x3)
TMI8120 from TMI, in a QFN-20-EP(3x3). 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 | OUT1 | output | H-bridge output to connect directly to the motor or other inductive load; channel 1 on-resistance is 550 mΩ typ at 1A load. |
| 2 | IN2 | input | Logic input controlling the H-bridge output; logic high requires at least 2.0V and logic low is 0.8V max, with an internal pulldown to GND. |
| 3 | IN1 | input | Logic input controlling the H-bridge output; logic high requires at least 2.0V and logic low is 0.8V max, with an internal pulldown to GND. |
| 4 | OUT3 | output | H-bridge output to connect directly to the motor or other inductive load; the datasheet lists this pin as OUT3 (see review notes). |
| 5 | OUT3 | output | H-bridge output to connect directly to the motor or other inductive load; the datasheet lists this pin as OUT3 (see review notes). |
| 6 | IN3 | input | Logic input controlling the H-bridge output; logic high requires at least 2.0V and logic low is 0.8V max, with an internal pulldown to GND. |
| 7 | IN4 | input | Logic input controlling the H-bridge output; logic high requires at least 2.0V and logic low is 0.8V max, with an internal pulldown to GND. |
| 8 | VDD2 | power_in | Power supply for the second H-bridge, 2.4V to 7.2V. |
| 9 | VDD2 | power_in | Power supply for the second H-bridge, 2.4V to 7.2V. |
| 10 | OUT4 | output | H-bridge output to connect directly to the motor or other inductive load; channel 2 on-resistance is 550 mΩ typ at 1A load. |
| 11 | OUT4 | output | H-bridge output to connect directly to the motor or other inductive load; channel 2 on-resistance is 550 mΩ typ at 1A load. |
| 12 | NC | unconnected | Not connected. |
| 13 | VDD1 | power_in | Power supply for the first H-bridge, 2.4V to 7.2V. |
| 14 | VDD1 | power_in | Power supply for the first H-bridge, 2.4V to 7.2V. |
| 15 | OUT2 | output | H-bridge output to connect directly to the motor or other inductive load; channel 1 on-resistance is 550 mΩ typ at 1A load. |
| 16 | OUT2 | output | H-bridge output to connect directly to the motor or other inductive load; channel 1 on-resistance is 550 mΩ typ at 1A load. |
| 17 | GND1 | power_in | Logic ground; connect to board ground. |
| 18 | GND1 | power_in | Logic ground; connect to board ground. |
| 19 | NC | unconnected | Not connected. |
| 20 | OUT1 | output | H-bridge output to connect directly to the motor or other inductive load; channel 1 on-resistance is 550 mΩ typ at 1A load. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TMI |
| Package | QFN-20-EP(3x3) |
| Category | Motor Driver ICs |
| Pins | 21 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power supply voltage (VDD1, VDD2) | -0.3 | 7.2 | V | 2 | |||
| Logic input voltage (INx) | -0.3 | V | Upper limit printed as VDD | 2 | |||
| Output peak current | 0 | 2 | A | 2 | |||
| Operation temperature | -30 | 85 | °C | 2 | |||
| Operating junction temperature | -40 | 150 | °C | 2 | |||
| Storage temperature | -55 | 150 | °C | 2 | |||
| ESD Human Body Model for all pins | VESD | -2000 | 2000 | V | JEDEC JS-001, printed as ±2000 | 3 | |
| Power supply voltage range | VDD1, VDD2 | 2.4 | 7.2 | V | 3 | ||
| Logic input voltage range | IN1, IN2, IN3, IN4 | 0 | V | Upper limit printed as VDD | 3 | ||
| VDDx operating voltage | VDD1, VDD2 | 2.4 | 7.2 | V | TA = 25°C, over recommended operating conditions | 4 | |
| VDDx operating supply current | IVDD1, IVDD2 | 0.1 | 0.5 | mA | IN1=IN2='H' or IN1='H' & IN2='L' or IN1='L' & IN3='H', no load | 4 | |
| VDDx standby current | ISTD | 0.1 | 10 | µA | IN1/IN2=IN3/IN4='L', no load | 4 | |
| Input logic low voltage | VIL | 0.8 | V | 4 | |||
| Input logic high voltage | VIH | 2 | V | 4 | |||
| Input logic low current | IIL | -1 | 1 | μA | VIN = 0V | 4 | |
| Input logic high current | IIH | 3.75 | 20 | μA | VIN = 5V | 4 | |
| Pulldown resistance to GND | RPD | 1.3 | MΩ | to GND | 4 | ||
| H-bridge on resistance | RDS(ON) | 550 | 700 | mΩ | ILOAD=1A, HS_PMOS+LS_NMOS | 4 |
CAD (KiCad official)
- Symbol:
TMI8120 - Footprint:
Package_DFN_QFN:UQFN-20-1EP_3x3mm_P0.4mm_EP1.85x1.85mm - 3D model: QFN-20-EP(3x3) (KiCad packages3D, STEP)
- 3D model files:
tmi8120-etched.step/tmi8120-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tmi8120.step/tmi8120.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TMI datasheet (9 pp, sha256
0455e94341abc96b, retrieved 2026-10-18, 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).