# SGM8770XS8G

**SGMICRO** · Comparators · SOIC-8

SGM8770XS8G from SGMICRO, 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 | OUTA | output | Open-drain output of comparator A that requires an external pull-up resistor; it can sink up to a short-circuit current of 36 mA typical at 25°C. |
| 2 | -INA | input | Inverting input of comparator A; input voltages must stay between (-VS) - 0.3V and (+VS) + 0.3V, and the common-mode range is -VS to (+VS) - 1.5V. |
| 3 | +INA | input | Non-inverting input of comparator A; input voltages must stay above (-VS) - 0.3V, and the common-mode range is -VS to (+VS) - 1.5V. |
| 4 | -VS | power_in | Negative power supply rail; the device operates from 2.8V to 36V single supply or ±1.4V to ±18V dual supplies. |
| 5 | +INB | input | Non-inverting input of comparator B; input voltages must stay above (-VS) - 0.3V, and the common-mode range is -VS to (+VS) - 1.5V. |
| 6 | -INB | input | Inverting input of comparator B; input voltages must stay between (-VS) - 0.3V and (+VS) + 0.3V, and the common-mode range is -VS to (+VS) - 1.5V. |
| 7 | OUTB | output | Open-drain output of comparator B that requires an external pull-up resistor; it can sink up to a short-circuit current of 36 mA typical at 25°C. |
| 8 | +VS | power_in | Positive power supply rail; the device operates from 2.8V to 36V single supply or ±1.4V to ±18V dual supplies. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | SGMICRO |
| Package | SOIC-8 |
| Category | Amplifiers/Comparators |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS |  | 0.6 | 2.4 | mV | VCM = 0V, +25℃ | 4 |
| Input Offset Voltage | VOS |  |  | 2.8 | mV | VCM = 0V, Full (-40℃ to +125℃) | 4 |
| Input Bias Current | IB | -240 | 20 | 240 | pA | VCM = 0V, +25℃ | 4 |
| Input Offset Current | IOS | -320 | 20 | 320 | pA | VCM = 0V, +25℃ | 4 |
| Maximum Input Difference Bias Current | /IID/ |  | 2.2 | 3 | μA | VS = ±18V, VID = ±18V, +25℃ | 4 |
| Maximum Input Difference Bias Current | /IID/ |  |  | 5 | μA | VS = ±18V, VID = ±18V, Full (-40℃ to +125℃) | 4 |
| Common Mode Rejection Ratio | CMRR | 96 | 116 |  | dB | VS = ±18V, VCM = -VS to (+VS) - 1.5V, +25℃ | 4 |
| Common Mode Rejection Ratio | CMRR | 80 |  |  | dB | VS = ±18V, VCM = -VS to (+VS) - 1.5V, Full (-40℃ to +125℃) | 4 |
| Power Supply Rejection Ratio | PSRR | 98 | 116 |  | dB | VS = 2.8V to 36V, +25℃ | 4 |
| Power Supply Rejection Ratio | PSRR | 95 |  |  | dB | VS = 2.8V to 36V, Full (-40℃ to +125℃) | 4 |
| Large-Signal Differential Voltage Amplification | AVD | 90 | 100 |  | dB | VS = 36V, VOUT = 0.1V to 28.8V, RL = 120kΩ to VS, +25℃ | 4 |
| Large-Signal Differential Voltage Amplification | AVD | 87 |  |  | dB | VS = 36V, VOUT = 0.1V to 28.8V, RL = 120kΩ to VS, Full (-40℃ to +125℃) | 4 |
| Output Voltage Swing from Rail | VOL |  | 200 | 280 | mV | ISINK = 8mA, VID = -0.2V, +25℃ | 4 |
| Output Voltage Swing from Rail | VOL |  |  | 410 | mV | ISINK = 8mA, VID = -0.2V, Full (-40℃ to +125℃) | 4 |
| Output Short-Circuit Current | ISINK | 24 | 36 |  | mA | VOL = (-VS) + 1.5V, VID = -0.2V, +25℃ | 4 |
| High-Level Output Current | IOH |  | 0.4 | 0.8 | μA | VOH = 2.8V, VID = 0.2V, +25℃ | 4 |
| High-Level Output Current | IOH |  |  | 1 | μA | VOH = 2.8V, VID = 0.2V, Full (-40℃ to +125℃) | 4 |
| High-Level Output Current | IOH |  | 6 | 9 | μA | VOH = 36V, VID = 0.2V, +25℃ | 4 |
| High-Level Output Current | IOH |  |  | 62 | μA | VOH = 36V, VID = 0.2V, Full (-40℃ to +125℃) | 4 |
| Total Supply Current | IS |  | 310 | 380 | μA | IOUT = 0mA, +25℃ | 4 |
| Total Supply Current | IS |  |  | 430 | μA | IOUT = 0mA, Full (-40℃ to +125℃) | 4 |
| Propagation Delay (High to Low) | tPHL |  |  | 75 | ns | Overdrive = 10mV, VS = ±2.5V, CL = 15pF, +25℃ | 4 |
| Propagation Delay (High to Low) | tPHL |  |  | 45 | ns | Overdrive = 100mV, VS = ±2.5V, CL = 15pF, +25℃ | 4 |
| Fall Time | tFALL |  |  | 15 | ns | Overdrive = 10mV, VS = ±2.5V, CL = 15pF, +25℃ | 4 |
| Operating Temperature Range |  | -40 |  | 125 | ℃ |  | 2 |
| Supply Voltage, +VS to -VS |  |  |  | 40 | V |  | 2 |
| Differential Input Voltage, /VID/ | /VID/ |  |  | 40 | V |  | 2 |
| Junction Temperature |  |  |  | 150 | ℃ |  | 2 |
| Storage Temperature Range |  | -65 |  | 150 | ℃ |  | 2 |
| Lead Temperature (Soldering) |  |  |  | 260 | ℃ | 10s | 2 |

## CAD (KiCad official)

- Symbol: `SGM8770XS8G`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `sgm8770xs8g-etched.step` / `sgm8770xs8g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sgm8770xs8g.step` / `sgm8770xs8g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [SGMICRO datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589914072474296321) (12 pp, sha256 `2766ee685d74a4cb`, retrieved 2026-10-18, 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/sgm8770xs8g-datasheet.pdf)