# DRV8428RTER

**Texas Instruments** · Stepper Motor Driver · WQFN-16-EP(3x3)

DRV8428RTER from Texas Instruments, in a WQFN-16-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 | AOUT1 | output | Winding A output. Connect to stepper motor winding. |
| 2 | AOUT2 | output | Winding A output. Connect to stepper motor winding. |
| 3 | BOUT2 | output | Winding B output. Connect to stepper motor winding. |
| 4 | BOUT1 | output | Winding B output. Connect to stepper motor winding. |
| 5 | GND | power_in | Device ground. Connect to system ground. |
| 6 | DVDD | power_in | Logic supply voltage. Connect a X7R, 0.47-μF to 1-μF, 6.3-V or 10-V rated ceramic capacitor to GND. |
| 7 | VREF | power_in | Current set reference input. Maximum value 3 V; DVDD can be used to provide VREF through a resistor divider. |
| 8 | M0 | input | Microstepping mode-setting pin. Sets the step mode with internal pulldown resistor. |
| 9 | DECAY/TOFF | input | Decay-mode and off-time setting pin. See Section 7.3.5 for details. |
| 10 | M1 | input | Microstepping mode-setting pin. Sets the step mode with internal pulldown resistor. |
| 11 | STEP | input | Step input. A rising edge causes the indexer to advance one step with internal pulldown resistor. |
| 12 | DIR | input | Direction input. Logic level sets the direction of stepping with internal pulldown resistor. |
| 13 | EN/nFAULT | bidirectional | Logic low to disable device outputs; logic high to enable. Also used for fault indication output, pulled logic low in fault condition. |
| 14 | nSLEEP | input | Sleep mode input. Logic high to enable device; logic low to enter low-power sleep mode with internal pulldown resistor. An nSLEEP low pulse clears faults. |
| 15 | VM | power_in | Motor power supply. Connect to motor supply voltage and bypass to PGND with a 0.01-µF ceramic capacitor plus a bulk capacitor rated for VM. |
| 16 | PGND | power_in | Power ground. Connect to system ground. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-16-EP(3x3) |
| Category | Motor Driver ICs |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `DRV8428RTER`
- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`
- 3D model: WQFN-16-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `drv8428rter-etched.step` / `drv8428rter-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `drv8428rter.step` / `drv8428rter.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/drv8428) (49 pp, sha256 `e7adba1f405903be`, retrieved 2026-10-01, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/drv8428rter-datasheet.pdf)