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A3909GLNTR-T
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Allegro MicroSystems LLC Stepper Motor Driver, SSOP-10-150mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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A3909GLNTR-T
Allegro MicroSystems LLC · Stepper Motor Driver · SSOP-10-150mil
A3909GLNTR-T from Allegro MicroSystems LLC, in a SSOP-10-150mil. 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 | IN1 | input | Logic input for the OUT1/OUT2 bridge with VIH minimum 2 V, VIL maximum 0.8 V, 300 mV typical hysteresis, and an internal 50 kΩ pull-down. |
| 2 | IN2 | input | Logic input for the OUT1/OUT2 bridge with VIH minimum 2 V, VIL maximum 0.8 V, 300 mV typical hysteresis, and an internal 50 kΩ pull-down. |
| 3 | VBB | power_in | Motor supply input with an operating range of 4 to 18 V and an absolute maximum of 18 V, and the internal UVLO threshold is 3.6 V typical on a rising supply. |
| 4 | IN3 | input | Logic input for the OUT3/OUT4 bridge with VIH minimum 2 V, VIL maximum 0.8 V, 300 mV typical hysteresis, and an internal 50 kΩ pull-down. |
| 5 | IN4 | input | Logic input for the OUT3/OUT4 bridge with VIH minimum 2 V, VIL maximum 0.8 V, 300 mV typical hysteresis, and an internal 50 kΩ pull-down. |
| 6 | OUT4 | output | Motor output terminal of bridge 2 with output voltage limited to -0.3 V to VBB + 1 V and output current up to 1 A per phase. |
| 7 | OUT3 | output | Motor output terminal of bridge 2 with output voltage limited to -0.3 V to VBB + 1 V and output current up to 1 A per phase. |
| 8 | GND | power_in | Ground terminal of the device, which is the reference for the logic inputs and motor outputs. |
| 9 | OUT2 | output | Motor output terminal of bridge 1 with output voltage limited to -0.3 V to VBB + 1 V and output current up to 1 A per phase. |
| 10 | OUT1 | output | Motor output terminal of bridge 1 with output voltage limited to -0.3 V to VBB + 1 V and output current up to 1 A per phase. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Allegro MicroSystems LLC |
| Package | SSOP-10-150mil |
| Category | Motor Driver ICs |
| Pins | 10 |
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 | VBB | 18 | V | 2 | |||
| Logic Input Voltage Range | VIN | -0.3 | 6 | V | 2 | ||
| Output Current | IOUT | 1 | A | 2 | |||
| Output Voltage | VOUT | -0.3 | V | 2 | |||
| Operating Ambient Temperature | TA | -40 | 105 | °C | G temperature range | 2 | |
| Maximum Junction Temperature | TJ(max) | 150 | °C | 2 | |||
| Storage Temperature | Tstg | -55 | 150 | °C | 2 | ||
| VBB Voltage Range | VBB | 4 | 18 | V | 3 | ||
| VBB Supply Current | IBB | 4 | 8 | mA | 3 | ||
| Standby Mode (VBB supply current) | 10 | µA | 3 | ||||
| Total Driver On-Resistance (Sink + Source) | RDS(on)tot | 1.6 | 2 | Ω | I = 1 A, TJ = 25°C, VBB = 12 V | 3 | |
| Total Driver On-Resistance (Sink + Source) | RDS(on)tot | 2.7 | 3.5 | Ω | I = 1 A, TJ = 25°C, VBB = 4 V | 3 | |
| Input Logic Low Level (standby) | VIL(Standby) | 0.4 | V | All inputs low | 3 | ||
| Input Logic Low Level | VIL | 0.8 | V | 3 | |||
| Input Logic High Level | VIH | 2 | V | 3 | |||
| Input Hysteresis | VHYS | 100 | 300 | 500 | mV | 3 | |
| Logic Input Current | IIN | 100 | 150 | µA | VIN = 5 V (Pull down = 50 kΩ) | 3 | |
| VBB UVLO | VBBUVLO | 3.6 | 3.95 | V | VBB rising | 3 | |
| VBB UVLO Hysteresis | VBBHYS | 100 | 300 | 500 | mV | 3 | |
| Standby Timer | tSTB | 1 | 1.5 | ms | IN1 = IN2 = IN3 = IN4 < VIL(Standby) | 3 | |
| Thermal Shutdown Temperature | TJTSD | 150 | 165 | 180 | °C | Temperature increasing | 3 |
| Package Thermal Resistance | RθJA | 130 | °C/W | LN package (estimated), on 1-layer PCB with copper limited to pin area | 2 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | wave solder applications. Both packages are lead (Pb) free with 100% matte-tin leadframe plating. | 1 |
CAD (KiCad official)
- Symbol:
A3909GLNTR-T - Footprint:
Package_SO:SSOP-10_3.9x4.9mm_P1.00mm - 3D model: SSOP-10-150mil (KiCad packages3D, STEP)
- 3D model files:
a3909glntr-t-etched.step/a3909glntr-t-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);a3909glntr-t.step/a3909glntr-t.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Allegro MicroSystems LLC datasheet (10 pp, sha256
8e1ceccc29a7168e, 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).
# A3909GLNTR-T
**Allegro MicroSystems LLC** · Stepper Motor Driver · SSOP-10-150mil
A3909GLNTR-T from Allegro MicroSystems LLC, in a SSOP-10-150mil. 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 | IN1 | input | Logic input for the OUT1/OUT2 bridge with VIH minimum 2 V, VIL maximum 0.8 V, 300 mV typical hysteresis, and an internal 50 kΩ pull-down. |
| 2 | IN2 | input | Logic input for the OUT1/OUT2 bridge with VIH minimum 2 V, VIL maximum 0.8 V, 300 mV typical hysteresis, and an internal 50 kΩ pull-down. |
| 3 | VBB | power_in | Motor supply input with an operating range of 4 to 18 V and an absolute maximum of 18 V, and the internal UVLO threshold is 3.6 V typical on a rising supply. |
| 4 | IN3 | input | Logic input for the OUT3/OUT4 bridge with VIH minimum 2 V, VIL maximum 0.8 V, 300 mV typical hysteresis, and an internal 50 kΩ pull-down. |
| 5 | IN4 | input | Logic input for the OUT3/OUT4 bridge with VIH minimum 2 V, VIL maximum 0.8 V, 300 mV typical hysteresis, and an internal 50 kΩ pull-down. |
| 6 | OUT4 | output | Motor output terminal of bridge 2 with output voltage limited to -0.3 V to VBB + 1 V and output current up to 1 A per phase. |
| 7 | OUT3 | output | Motor output terminal of bridge 2 with output voltage limited to -0.3 V to VBB + 1 V and output current up to 1 A per phase. |
| 8 | GND | power_in | Ground terminal of the device, which is the reference for the logic inputs and motor outputs. |
| 9 | OUT2 | output | Motor output terminal of bridge 1 with output voltage limited to -0.3 V to VBB + 1 V and output current up to 1 A per phase. |
| 10 | OUT1 | output | Motor output terminal of bridge 1 with output voltage limited to -0.3 V to VBB + 1 V and output current up to 1 A per phase. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Allegro MicroSystems LLC |
| Package | SSOP-10-150mil |
| Category | Motor Driver ICs |
| Pins | 10 |
## 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 | VBB | | | 18 | V | | 2 |
| Logic Input Voltage Range | VIN | -0.3 | | 6 | V | | 2 |
| Output Current | IOUT | | | 1 | A | | 2 |
| Output Voltage | VOUT | -0.3 | | | V | | 2 |
| Operating Ambient Temperature | TA | -40 | | 105 | °C | G temperature range | 2 |
| Maximum Junction Temperature | TJ(max) | | | 150 | °C | | 2 |
| Storage Temperature | Tstg | -55 | | 150 | °C | | 2 |
| VBB Voltage Range | VBB | 4 | | 18 | V | | 3 |
| VBB Supply Current | IBB | | 4 | 8 | mA | | 3 |
| Standby Mode (VBB supply current) | | | | 10 | µA | | 3 |
| Total Driver On-Resistance (Sink + Source) | RDS(on)tot | | 1.6 | 2 | Ω | I = 1 A, TJ = 25°C, VBB = 12 V | 3 |
| Total Driver On-Resistance (Sink + Source) | RDS(on)tot | | 2.7 | 3.5 | Ω | I = 1 A, TJ = 25°C, VBB = 4 V | 3 |
| Input Logic Low Level (standby) | VIL(Standby) | | | 0.4 | V | All inputs low | 3 |
| Input Logic Low Level | VIL | | | 0.8 | V | | 3 |
| Input Logic High Level | VIH | 2 | | | V | | 3 |
| Input Hysteresis | VHYS | 100 | 300 | 500 | mV | | 3 |
| Logic Input Current | IIN | | 100 | 150 | µA | VIN = 5 V (Pull down = 50 kΩ) | 3 |
| VBB UVLO | VBBUVLO | | 3.6 | 3.95 | V | VBB rising | 3 |
| VBB UVLO Hysteresis | VBBHYS | 100 | 300 | 500 | mV | | 3 |
| Standby Timer | tSTB | | 1 | 1.5 | ms | IN1 = IN2 = IN3 = IN4 < VIL(Standby) | 3 |
| Thermal Shutdown Temperature | TJTSD | 150 | 165 | 180 | °C | Temperature increasing | 3 |
| Package Thermal Resistance | RθJA | | 130 | | °C/W | LN package (estimated), on 1-layer PCB with copper limited to pin area | 2 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | wave solder applications. Both packages are lead (Pb) free with 100% matte-tin leadframe plating. | 1 |
## CAD (KiCad official)
- Symbol: `A3909GLNTR-T`
- Footprint: `Package_SO:SSOP-10_3.9x4.9mm_P1.00mm`
- 3D model: SSOP-10-150mil (KiCad packages3D, STEP)
- 3D model files: `a3909glntr-t-etched.step` / `a3909glntr-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `a3909glntr-t.step` / `a3909glntr-t.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Allegro MicroSystems LLC datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588931118578352128) (10 pp, sha256 `8e1ceccc29a7168e`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/a3909glntr-t-datasheet.pdf)