# REAR56957BGSM#HC0

**RENESAS** · Supervisor And Reset ICs · SOP-8

REAR56957BGSM#HC0 from RENESAS, in a SOP-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 | NC | unconnected | No connection. |
| 2 | Input | input | Detection voltage sense input with a 1.25V (typ) threshold; recommended range is about 0.8V to VCC-0.3V for VCC ≤ 7V, and about 0.8V to 6.7V for VCC > 7V. |
| 3 | NC | unconnected | No connection. |
| 4 | GND | power_in | Ground. |
| 5 | Delay capacitor | passive | Connects the external delay capacitor Cd (4700pF to 10µF) charged by a 5µA (typ) constant current, giving td ≈ 0.34 × Cd(pF) µs. |
| 6 | Output | output | Open-collector reset output (type B) that needs a pull-up resistor RL; it can be pulled up to 17V max, with sink current of 4mA or less recommended (6mA absolute maximum). |
| 7 | Power-supply | power_in | Power supply input (VCC), 2V to 17V recommended operating range, absolute maximum 18V. |
| 8 | NC | unconnected | No connection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RENESAS |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Detecting Voltage | VS | 1.2 | 1.25 | 1.3 | V |  | 3 |
| Hysteresis Voltage | ΔVS | 9 | 15 | 23 | mV | VCC = 5V | 3 |
| Input Current | IIN |  | 100 | 500 | nA | VIN = 1.25V | 3 |
| Circuit Current | ICC |  | 360 | 540 | µA | Type B, VCC = 5V | 3 |
| Delay Time | tpd | 1.6 | 3.4 | 7 | ms | Cd = 0.01μF | 3 |
| Constant Current | Ipd | -8 | -5 | -3 | µA | VCC = 5V | 3 |
| Output Saturation Voltage | Vsat |  | 0.2 | 0.4 | V | VCC = 5V, VIN < 1.2V, ISINK = 4mA | 3 |
| Threshold Operating Voltage | VOPL |  | 0.67 | 0.9 | V | RL = 2.2kΩ, Vsat ≤ 0.4V | 3 |
| Threshold Operating Voltage | VOPL |  | 0.55 | 0.8 | V | RL = 100kΩ, Vsat ≤ 0.4V | 3 |
| Output Leakage Current | IOH |  |  | 30 | nA | Type B, Vout ≤ 17V | 3 |
| Supply Voltage Range | VCC | 2 |  | 17 | V |  | 3 |
| Input Voltage Range | VIN | -0.3 |  | 7 | V | VCC > 7V | 3 |
| Detecting Voltage Temperature Coefficient | VS/ΔT |  | 0.01 |  | %/˚C |  | 3 |
| Supply Voltage (recommended) | VCC | 2 |  | 17 | V |  | 3 |
| Supply Voltage | VCC | -0.3 |  | 18 | V | Ta=25˚C | 3 |
| Output Sink Current | ISINK |  |  | 6 | mA | Ta=25˚C | 3 |
| Output Applied Voltage | VO | -0.3 |  | 18 | V | Type B (open collector output) | 3 |
| Total Power Dissipation | Pd |  |  | 440 | mW | Ta=25˚C | 3 |
| Thermal Derating | Kθ |  | 4.4 |  | mW/˚C | Refer to the thermal derating curve. | 3 |
| Operating Temperature | Topr | -40 |  | 85 | ˚C |  | 3 |
| Storage Temperature | Tstg | -55 |  | 125 | ˚C |  | 3 |
| Input Voltage Range (VCC ≤ 7V) | VIN | -0.3 |  |  | V | VCC ≤ 7V, max is VCC | 3 |
| Input Voltage Range (VCC > 7V) | VIN | -0.3 |  | 7 | V | VCC > 7V | 3 |

## CAD (KiCad official)

- Symbol: `REAR56957BGSM#HC0`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `rear56957bgsm-hc0-etched.step` / `rear56957bgsm-hc0-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rear56957bgsm-hc0.step` / `rear56957bgsm-hc0.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [RENESAS datasheet](docs/rear56957bgsm-hc0-datasheet.pdf) (12 pp, sha256 `5190d222e22518f7`, retrieved 2026-10-31, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/rear56957bgsm-hc0-datasheet.pdf)