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TMC2208-LA-T

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TRINAMIC Motion Control GmbH Stepper Motor Driver, QFN-28-EP(5x5). Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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TMC2208-LA-T

TRINAMIC Motion Control GmbH · Stepper Motor Driver · QFN-28-EP(5x5)

TMC2208-LA-T from TRINAMIC Motion Control GmbH, in a QFN-28-EP(5x5). Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 OB2 output Motor coil B output 2; open drain output stage that directly drives motor phase B terminal.
2 ENN input Enable not input; high level disables all motor driver bridges setting outputs to high impedance floating state.
3 GND power_in Ground reference; connect to GND plane with short path near pin.
4 CPO output Charge pump capacitor output; tie to CPI via 22nF 50V capacitor for charge pump stabilization.
5 CPI input Charge pump capacitor input; capacitively coupled from CPO via 22nF capacitor for charge pump feedback integration.
6 VCP output Charge pump voltage output; filter with 100nF capacitor tied to VS for high-side driver supply.
7 N.C. unconnected Unused pin; leave open or connect to GND for compatibility to future device versions.
8 5VOUT power_out 5V regulator output; attach 2.2-4.7µF ceramic capacitor directly to GND near pin for filtering.
9 MS1 input Microstep resolution selection input with internal pull-down resistor; combined with MS2 pin for resolution setting.
10 MS2 input Microstep resolution selection input with internal pull-down resistor; MS2:MS1 = 00 selects 1/8, 01 selects 1/2, 10 selects 1/4, 11 selects 1/16 microsteps.
11 DIAG output Diagnostic output; high logic level indicates driver shutdown due to overtemperature or short circuit, reset by ENN=high.
12 INDEX output Configurable index output; provides pulse at microstep counter zero position indicating one electrical rotation or toggle on internal step pulses.
13 CLK input Clock input; tie to GND with short wire for internal 12MHz trimmed oscillator or supply external 4-18MHz clock for precise timing.
14 PDN_UART bidirectional Power down not control input and optional single-wire UART interface; low enables automatic standstill current reduction, or bidirectional data line when UART configured.
15 VCC_IO power_in Digital IO supply voltage 3.3V to 5V; provides logic levels for all digital control and signal pins.
16 STEP input Step pulse input; rising edge (or both edges if DEDGE enabled) increments/decrements microstep counter with selected resolution.
17 VREF power_in Analog reference voltage input 0-2.5V for motor current scaling; or reference current input when using internal RDSon current sensing mode.
18 GND power_in Ground reference; connect to GND plane with short path near pin.
19 DIR input Direction input with internal pull-down resistor; high level commands reverse motor rotation, low level commands forward rotation.
20 N.C. unconnected Unused pin; leave open or connect to GND for compatibility to future device versions.
21 OA2 output Motor coil A output 2; open drain output stage that directly drives motor phase A terminal.
22 VS power_in Motor supply voltage 4.75-36V DC; provide bulk filtering with low ESR electrolytics and short GND return path.
23 BRA input Sense resistor connection for coil A; place external sense resistor to GND near pin or tie to GND when using internal RDSon current sensing mode.
24 OA1 output Motor coil A output 1; open drain output stage that directly drives motor phase A terminal.
25 N.C. unconnected Unused pin; leave open or connect to GND for compatibility to future device versions.
26 OB1 output Motor coil B output 1; open drain output stage that directly drives motor phase B terminal.
27 BRB input Sense resistor connection for coil B; place external sense resistor to GND near pin or tie to GND when using internal RDSon current sensing mode.
28 VS power_in Motor supply voltage 4.75-36V DC; provide bulk filtering with low ESR electrolytics and short GND return path.
29 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer TRINAMIC Motion Control GmbH
Package QFN-28-EP(5x5)
Category Motor Driver ICs
Pins 29

CAD (KiCad official)

  • Symbol: TMC2208-LA-T
  • Footprint: Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm
  • 3D model: QFN-28-EP(5x5) (KiCad packages3D, STEP)
  • 3D model files: tmc2208-la-t-etched.step / tmc2208-la-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tmc2208-la-t.step / tmc2208-la-t.glb are the bare package body.

Provenance

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

  • Datasheet: TRINAMIC Motion Control GmbH datasheet (81 pp, sha256 255c42856d78b0c7, retrieved 2026-09-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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