# UC3770BN

**Texas Instruments** · Gate Drive ICs · PDIP-16

UC3770BN from Texas Instruments, in a PDIP-16. 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 | BOUT | output | Bridge output B of the H-bridge; output current is rated up to ±2A. |
| 2 | Timing | passive | Monostable timing pin where the RT/CT network sets the off time, tOFF = 0.69RTCT. |
| 3 | VM | power_in | Motor supply voltage input, 10V to 45V operating range (50V absolute maximum). |
| 4 | Gnd | power_in | Ground; the reference for all voltages, and internally connected with pins 5, 12 and 13. |
| 5 | Gnd | power_in | Ground; the reference for all voltages, and internally connected with pins 4, 12 and 13. |
| 6 | VCC | power_in | Logic supply voltage, 4.75V to 5.3V (7V absolute maximum). |
| 7 | I1 | input | LS-TTL compatible logic input that selects the current level, with threshold 0.8V to 2.0V and 6V absolute maximum. |
| 8 | Phase | input | LS-TTL compatible logic input that sets the direction of the bridge output current, with threshold 0.8V to 2.0V and 6V absolute maximum. |
| 9 | I0 | input | LS-TTL compatible logic input that selects the current level, with threshold 0.8V to 2.0V and 6V absolute maximum. |
| 10 | Current | input | Current-sense comparator input, which is limited to VCC maximum and has an input current of ±20µA maximum. |
| 11 | VR | input | Reference input voltage for the current-sense thresholds, 15V absolute maximum. |
| 12 | Gnd | power_in | Ground; the reference for all voltages, and internally connected with pins 4, 5 and 13. |
| 13 | Gnd | power_in | Ground; the reference for all voltages, and internally connected with pins 4, 5 and 12. |
| 14 | VM | power_in | Motor supply voltage input, 10V to 45V operating range (50V absolute maximum). |
| 15 | AOUT | output | Bridge output A of the H-bridge; output current is rated up to ±2A. |
| 16 | Emitters | passive | Common emitter connection of the low-side drivers, where the external current-sense resistor is connected. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-16 |
| Category | Power Management ICs |
| Pins | 16 |

## 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 | VM (Pins 3, 14) | 10 |  | 45 | V |  | 2 |
| Logic Supply Voltage | VCC (Pin 6) | 4.75 | 5 | 5.3 | V |  | 2 |
| Logic Supply Current | ICC (Pin 6) |  | 15 | 25 | mA | IO = I1 = H, IM = 0 | 2 |
| Logic Supply Current | ICC (Pin 6) |  | 18 | 28 | mA | IO = I1 = L, IM = 0 | 2 |
| Logic Supply Current | ICC (Pin 6) |  | 33 | 40 | mA | IO = I1 = H, IM = 1.3A | 2 |
| Thermal Shutdown Temperature |  |  | 170 |  | °C |  | 2 |
| Logic Threshold | Pins 7, 8, 9 | 0.8 |  | 2 | V |  | 2 |
| Input Current Low | Pin 8 |  |  | -100 | µA | VI = 0.4V | 2 |
| Input Current Low | Pins 7, 9 |  |  | -400 | µA | VI = 0.4V | 2 |
| Input Current High | Pins 7, 8, 9 |  |  | 10 | µA | VI = 2.4V | 2 |
| Comparator Threshold | Pin 10 | 400 | 415 | 430 | mV | VR = 5V, I0 = L, I1 = L | 2 |
| Comparator Threshold | Pin 10 | 290 | 300 | 315 | mV | VR = 5V, I0 = H, I1 = L | 2 |
| Comparator Threshold | Pin 10 | 195 | 210 | 225 | mV | VR = 5V, I0 = L, I1 = H | 2 |
| Comparator Input Current | Pin 10 | -20 |  | 20 | µA |  | 2 |
| Off Time | RT, CT | 25 | 30 | 35 | ms | RT = 56k, CT = 820pF | 2 |
| Turn Off Delay |  |  | 2 |  | ms |  | 3 |
| Sink Driver Saturation Voltage |  |  |  | 0.8 | V | IM = 1.0A | 3 |
| Sink Driver Saturation Voltage |  |  |  | 1.3 | V | IM = 1.3A | 3 |
| Source Driver Saturation Voltage |  |  |  | 1.3 | V | IM = 1.0A | 3 |
| Source Driver Saturation Voltage |  |  |  | 1.6 | V | IM = 1.3A | 3 |
| Output Leakage Current |  |  |  | 100 | µA | VM = 45V | 3 |
| Logic Supply Voltage | VCC |  |  | 7 | V |  | 2 |
| Output Supply Voltage | VMM |  |  | 50 | V |  | 2 |
| Logic Input Voltage | Pins 7, 8, 9 |  |  | 6 | V |  | 2 |
| Reference Input Voltage | Pin 11 |  |  | 15 | V |  | 2 |
| Logic Input Current | Pins 7, 8, 9 | -10 |  |  | mA |  | 2 |
| Analog Input Current | Pins 10, 11 | -10 |  |  | mA |  | 2 |
| Output Current | Pins 1, 15 | -2 |  | 2 | A |  | 2 |
| Junction Temperature | TJ |  |  | 150 | °C |  | 2 |
| Operating Ambient Temperature | TA | 0 |  | 70 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `UC3770BN`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: PDIP-16 (KiCad packages3D, STEP)
- 3D model files: `uc3770bn-etched.step` / `uc3770bn-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc3770bn.step` / `uc3770bn.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](docs/uc3770bn-datasheet.pdf) (6 pp, sha256 `3435383e546e5243`, retrieved 2026-10-30, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/uc3770bn-datasheet.pdf)