# UC3906N

**Texas Instruments** · Battery Management · PDIP-16

UC3906N 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 | C/S OUT | output | Current sense amplifier output; absolute maximum output current is 80mA and maximum output current is 40mA typical at VOUT = 2V. |
| 2 | C/S- | input | Current sense comparator inverting input, which is the reference for the 25mV input offset voltage. |
| 3 | C/S+ | input | Current sense comparator non-inverting input, with 0.1µA typical input bias current. |
| 4 | C/L | input | Current limit amplifier input with a 250mV typical threshold below +VIN. |
| 5 | +VIN | power_in | Positive supply input, with an absolute maximum of 40V and a supply under-voltage threshold of 4.5V typical. |
| 6 | GROUND | power_in | Ground; all voltages are referenced to this pin. |
| 7 | POWER INDICATE | output | Open-collector output indicating input power is present, with a 40V maximum output voltage and 20mA maximum output current. |
| 8 | OVER-CHARGE TERMINATE | input | Over-charge terminate input with a 1.0V typical threshold, a 10µA internal pull-up and a -0.3V to +40V input range. |
| 9 | OVER-CHARGE INDICATE | output | Open-collector output indicating the over-charge state, with a 40V maximum output voltage and 20mA maximum output current. |
| 10 | STATE LEVEL CONTROL | output | Open-collector state level control output, with a 40V maximum output voltage and 20mA maximum output current. |
| 11 | TRICKLE BIAS | output | Trickle bias output of the enable comparator for low-current turn-on, with an absolute maximum output current of -40mA. |
| 12 | CHARGE ENABLE | input | Enable comparator input with a threshold of 1.0 times VREF typical, used to enable charging. |
| 13 | VOLTAGE SENSE | input | Voltage amplifier and voltage sense comparator input that regulates at VREF (2.3V typical). |
| 14 | COMPENSATION | passive | Voltage amplifier compensation connection. |
| 15 | DRIVER SOURCE | output | Driver source output that supplies at least 25mA of base drive to an external pass device, with an 80mA absolute maximum driver current. |
| 16 | DRIVER SINK | passive | Driver sink connection, with an 80mA absolute maximum driver current. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `UC3906N`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: PDIP-16 (KiCad packages3D, STEP)
- 3D model files: `uc3906n-etched.step` / `uc3906n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc3906n.step` / `uc3906n.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/uc3906) (18 pp, sha256 `ed68a3ab3faa423e`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/uc3906n-datasheet.pdf)