# CBM708AS8

**Corebai Microelectronics** · Monitors & Reset Circuits · SOIC-8

CBM708AS8 from Corebai Microelectronics, 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 | MR | input | Manual reset input: a reset is generated when this pin is taken below 0.8 V, and an internal 250 µA pull-up holds it high when floating. |
| 2 | VCC | power_in | 5 V power supply input; place a 0.1 µF decoupling capacitor between VCC and GND. |
| 3 | GND | power_in | 0 V ground reference for all signals. |
| 4 | PFI | input | Power fail input, the noninverting input to the power fail comparator; when PFI is below 1.25 V, PFO goes low, and if unused it must be connected to GND. |
| 5 | PFO | output | Power fail output from the power fail comparator; it goes low when PFI is less than 1.25 V. |
| 6 | NC | unconnected | No connect; not internally connected on the CBM707/CBM708 SOIC package. |
| 7 | RESET | output | Active-low logic output that goes low for 200 ms when VCC is below the reset threshold (4.40 V for CBM708) or MR is pulled low, and stays low until 200 ms after VCC rises above the threshold or MR goes high. |
| 8 | RESET | output | Active-high reset output, the inverse of RESET, for systems that use active-high reset logic. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Corebai Microelectronics |
| Package | SOIC-8 |
| Category | Power Management ICs |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VCC Operating Voltage Range | VCC | 1 |  | 5.5 | V |  | 3 |
| Supply Current |  |  | 190 | 250 | μA |  | 3 |
| Reset Threshold |  | 4.25 | 4.4 | 4.5 | V | CBM706/CBM708 | 3 |
| RESET Pulse Width |  | 160 | 200 | 280 | ms |  | 3 |
| RESET Output Voltage (low) |  |  |  | 0.4 | V | ISINK = 3.2 mA | 3 |
| RESET Output Voltage (low) |  |  |  | 0.3 | V | VCC = 1 V, ISINK = 50 µA | 3 |
| RESET Output Voltage (low, active-high part output) |  |  |  | 0.4 | V | CBM707/CBM708, ISINK = 1.2 mA | 3 |
| MR Pull-Up Current |  | 100 | 250 | 600 | µA | MR = 0V | 3 |
| MR Pulse Width |  | 150 |  |  | ns |  | 3 |
| MR Input Threshold Logic Low |  |  |  | 0.8 | V |  | 3 |
| MR Input Threshold Logic High |  | 2 |  |  | V |  | 3 |
| PFI Input Threshold |  | 1.2 | 1.25 | 1.3 | V |  | 3 |
| PFI Input Current |  | -25 | 0.01 | 25 | nA |  | 3 |
| PFO Output Voltage (low) |  |  |  | 0.4 | V | ISINK = 3.2 mA | 3 |
| VCC Supply Voltage (absolute) | VCC | -0.3 |  | 6 | V |  | 4 |
| All Other Inputs |  | -0.3 |  |  | V |  | 4 |
| Input Current (VCC pin) |  |  |  | 20 | mA |  | 4 |
| Input Current (GND pin) |  |  |  | 20 | mA |  | 4 |
| Digital Output Current |  |  |  | 20 | mA |  | 4 |
| Power Dissipation, R-8 SOIC |  |  |  | 470 | mW |  | 4 |
| θJA Thermal Impedance, R-8 SOIC | θJA |  |  | 110 | ℃/W |  | 4 |
| Operating Temperature Range, Industrial (Version A) |  | -40 |  | 85 | ℃ | Industrial (Version A) | 4 |
| Storage Temperature Range |  | -65 |  | 150 | ℃ |  | 4 |
| Lead Temperature (Soldering) |  |  |  | 300 | ℃ | 10 sec | 4 |
| Lead Temperature (Vapor Phase) |  |  |  | 215 | ℃ | Vapor Phase (60 sec) | 4 |
| Lead Temperature (Infrared) |  |  |  | 220 | ℃ | Infrared (15 sec) | 4 |
| ESD Rating |  | 4.5 |  |  | kV |  | 4 |

## CAD (KiCad official)

- Symbol: `CBM708AS8`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `cbm708as8-etched.step` / `cbm708as8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cbm708as8.step` / `cbm708as8.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Corebai Microelectronics datasheet](docs/cbm708as8-datasheet.pdf) (18 pp, sha256 `3801fabe2d46d615`, retrieved 2026-10-30, tier: lcsc)
- **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/cbm708as8-datasheet.pdf)