# 24LC08BT-I/OT

**Microchip** · EEPROM · SOT-23-5

24LC08BT-I from Microchip, in a SOT-23-5. 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 | A0 | unconnected | Not connected internally on the 24XX08. May be left floating or tied to VSS or VCC. |
| 2 | A1 | unconnected | Not connected internally on the 24XX08. May be left floating or tied to VSS or VCC. |
| 3 | A2 | unconnected | Not connected internally on the 24XX08. May be left floating or tied to VSS or VCC. |
| 4 | VSS | power_in | Ground reference for the device (0 V). |
| 5 | SDA | bidirectional | Serial Address / Data I/O for the I2C bus. Open-drain bidirectional pin; requires an external pull-up to VCC (typ. 10 kΩ at 100 kHz, 2 kΩ at 400 kHz and 1 MHz). Schmitt-trigger input with noise suppression. |
| 6 | SCL | input | I2C serial clock input driven by the host, used to synchronize data transfers to and from the device. Schmitt-trigger input. |
| 7 | WP | input | Write-Protect input. Must be tied to VSS (normal read/write operation) or VCC (entire array 000-3FF write-protected; reads still allowed). Do not leave floating. |
| 8 | VCC | power_in | Positive supply. 2.5V-5.5V for 24LC08B (1.7V-5.5V for 24AA08/24FC08). Decouple to VSS with a local bypass capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip |
| Package | SOT-23-5 |
| Category | Memory |
| Pins | 8 |

## Ordering variants

- `24LC08BT-ISN`
- `24LC08BT-IP`
- `24LC08BT-IMS`
- `24LC08BT-IST`
- `24LC08BT-IMC`
- `24LC08BT-IMNY`
- `24LC08BT-IOT`

## CAD (KiCad official)

- Symbol: `24LC08BT-I`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `24lc08bt-i-etched.step` / `24lc08bt-i-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `24lc08bt-i.step` / `24lc08bt-i.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`24lc08bt-i.step`](24lc08bt-i.step) | 85 KB | You want the bare part, or you mark your own boards. |
| [`24lc08bt-i-etched.step`](24lc08bt-i-etched.step) | 1.8 MB | You want the part with `24LC08BT-I` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 449 faces against 102 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [Microchip datasheet](docs/24lc08bt-i-datasheet.pdf) (48 pp, sha256 `033b0fb6a9be5ea4`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/24lc08bt-i-datasheet.pdf)

## Other parts in this family

This page is **24LC08BT-I/OT**. These part numbers share its family name but are different parts (another package, rating or grade), each with its own page:

- 24LC08BT-I/MC
- 24LC08BT-I/OT-TUDI
- 24LC08BT-I/SN