component
LM311DR2G
Public Made by Adomby adom
onsemi Comparators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM311DR2G
onsemi · Comparators · SOIC-8
LM311DR2G from onsemi, 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 | GND | power_in | Ground pin of the comparator, where the output transistor emitter is returned; input polarity is reversed if it is used as an output. |
| 2 | IN+ | input | Comparator input (non-inverting per the standard LM311 pinout); input voltage rating is ±15 V and differential input is ±30 V. |
| 3 | IN- | input | Comparator input (inverting per the standard LM311 pinout); input voltage rating is ±15 V and differential input is ±30 V. |
| 4 | VEE | power_in | Negative supply; ground to VEE voltage is limited to 30 V and total supply VCC+ |
| 5 | BALANCE | passive | Offset balance/trim pin that acts as an auxiliary input, so tie it to pin 6 if unused or to a trim-pot, and tie both to VCC for fastest response. |
| 6 | BALANCE/STROBE | passive | Offset balance and strobe pin, which must be current driven at 3.0 mA to 5.0 mA and never shorted to ground, with voltage limited to VCC to VCC-5 V. |
| 7 | OUTPUT | output | Open-collector style output that can switch up to 40 V (LM311) at currents to 50 mA and drive loads referenced to ground, VCC or VEE. |
| 8 | VCC | power_in | Positive supply for single 5.0 V to 30 V operation or split supplies, with total supply limited to 36 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| 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 | VIO | 2 | 7.5 | mV | RS ≤ 50 k, TA = +25°C | 3 | |
| Input Offset Voltage | VIO | 10 | mV | RS ≤ 50 k, Tlow ≤ TA ≤ Thigh (LM311: 0°C to +70°C) | 3 | ||
| Input Offset Current | IIO | 1.7 | 50 | nA | TA = +25°C | 3 | |
| Input Offset Current | IIO | 70 | nA | Tlow ≤ TA ≤ Thigh (LM311: 0°C to +70°C) | 3 | ||
| Input Bias Current | IIB | 45 | 250 | nA | TA = +25°C | 3 | |
| Input Bias Current | IIB | 300 | nA | Tlow ≤ TA ≤ Thigh (LM311: 0°C to +70°C) | 3 | ||
| Voltage Gain | AV | 40 | 200 | V/mV | 3 | ||
| Saturation Voltage | VOL | 0.75 | 1.5 | V | VID ≤ −10 mV, IO = 50 mA, TA = 25°C | 3 | |
| Saturation Voltage | VOL | 0.23 | 0.4 | V | VCC ≥ 4.5 V, VEE = 0, Tlow ≤ TA ≤ Thigh; VID ≤ 10 mV, Isink ≤ 8.0 mA | 3 | |
| Output Leakage Current | 0.2 | 50 | nA | VID ≥ 10 mV, VO = 35 V, TA = 25°C, Istrobe = 3.0 mA | 3 | ||
| Input Voltage Range | VICR | -14.5 | 13 | V | Tlow ≤ TA ≤ Thigh (LM311: 0°C to +70°C) | 3 | |
| Positive Supply Current | ICC | 2.4 | 7.5 | mA | 3 | ||
| Negative Supply Current | IEE | -1.3 | -5 | mA | 3 | ||
| Total Supply Voltage | VCC +/VEE/ | 36 | Vdc | 2 | |||
| Output to Negative Supply Voltage | VO −VEE | 40 | Vdc | 2 | |||
| Ground to Negative Supply Voltage | VEE | 30 | Vdc | 2 | |||
| Input Differential Voltage | VID | -30 | 30 | Vdc | 2 | ||
| Input Voltage | Vin | -15 | 15 | Vdc | See Note 2: applies for ±15 V supplies | 2 | |
| Operating Junction Temperature | TJ(max) | 150 | °C | 2 | |||
| Storage Temperature Range | Tstg | -65 | 150 | °C | 2 | ||
| Operating Ambient Temperature Range (LM311) | TA | 0 | 70 | °C | 2 | ||
| Single Supply Voltage | 5 | 30 | V | Single-supply operation (features text; split supplies ±15 V also stated) | 1 |
CAD (KiCad official)
- Symbol:
LM311DR2G - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
lm311dr2g-etched.step/lm311dr2g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm311dr2g.step/lm311dr2g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (11 pp, sha256
8ac91e9e2c9e5e78, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).