# CBM8539AMS8

**Corebai Microelectronics** · Precision OpAmps · MSOP-8

CBM8539AMS8 from Corebai Microelectronics, in a MSOP-8. 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 | OUTA | output | Output of amplifier channel A. Rail-to-rail output stage; typical short-circuit current 40 mA. VOH ≈ (V+)-2 mV with RL=100 kΩ to GND. |
| 2 | INA- | input | Inverting input of amplifier channel A. High-impedance CMOS input; typical input bias current 50 pA, offset current 10 pA. Diode-clamped to the supply rails; limit input current to ±10 mA. |
| 3 | INA+ | input | Non-inverting input of amplifier channel A. Rail-to-rail input common-mode range from (V-)-0.1 V to (V+)+0.1 V. Diode-clamped to the supply rails. |
| 4 | VSS | power_in | Negative supply / ground pin (V-). Referenced to V+ for a total supply of +2.5 V to +5.5 V (7.0 V absolute max). |
| 5 | INB+ | input | Non-inverting input of amplifier channel B. Rail-to-rail input common-mode range from (V-)-0.1 V to (V+)+0.1 V. Diode-clamped to the supply rails. |
| 6 | INB- | input | Inverting input of amplifier channel B. High-impedance CMOS input; typical input bias current 50 pA, offset current 10 pA. Diode-clamped to the supply rails; limit input current to ±10 mA. |
| 7 | OUTB | output | Output of amplifier channel B. Rail-to-rail output stage; typical short-circuit current 40 mA. VOH ≈ (V+)-2 mV with RL=100 kΩ to GND. |
| 8 | VDD | power_in | Positive supply pin (V+). +2.5 V to +5.5 V single-supply, or split ±1.25 V to ±2.75 V. Absolute max supply 7.0 V. Decouple to VSS with a local ceramic capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Corebai Microelectronics |
| Package | MSOP-8 |
| Category | Op-amp/Cmp |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `CBM8539AMS8`
- `CBM8539AMS8SOP8`

## CAD (KiCad official)

- Symbol: `CBM8539AMS8`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `cbm8539ams8-etched.step` / `cbm8539ams8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cbm8539ams8.step` / `cbm8539ams8.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Corebai Microelectronics datasheet](docs/cbm8539ams8-datasheet.pdf) (14 pp, sha256 `06a1ac3ced5de972`, retrieved 2026-08-17, tier: lcsc)
- **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/cbm8539ams8-datasheet.pdf)