# BQ24400DR

**Texas Instruments** · Battery Management · SOIC-8

BQ24400DR from Texas Instruments, in a SOIC-8. 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 | SNS | input | Current-sense input that senses battery current from the voltage developed across an external sense resistor connected in series with the battery pack. |
| 2 | LED | output | Open-drain charge-status output that turns an external LED on, off, or flashing through a series resistor. |
| 3 | BAT | input | Battery-voltage sense input, generated by a simple resistive divider across the battery terminals. |
| 4 | VSS | power_in | System ground, to be connected to the battery's negative terminal. |
| 5 | RC | input | Timer-program input where a capacitor from VCC and a resistor to ground set the maximum fast-charge time, top-off time, hold-off period, trickle-charge rate, and top-off enable. |
| 6 | TS | input | Temperature-sense input for an external divider with a negative-temperature-coefficient thermistor that sets the lower and upper temperature thresholds. |
| 7 | VCC | power_in | Supply-voltage input; the datasheet recommends 10 µF plus 0.1 µF to 0.22 µF of decoupling capacitance near the pin. |
| 8 | MOD | output | Push-pull charging-current control output that switches high to enable charging current and low to inhibit it. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `BQ24400DR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `bq24400dr-etched.step` / `bq24400dr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bq24400dr.step` / `bq24400dr.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/lit/ds/symlink/bq24400.pdf) (29 pp, sha256 `4b9637da6d24c721`, retrieved 2026-10-08, tier: manufacturer)
- **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/bq24400dr-datasheet.pdf)