component

LM311DR-CN

Public Made by Adom

by adom

ChipNobo Comparators, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs Publish 0.1.0 · Ray 2h ago
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lm311dr-cn-etched.glb lm311dr-cn: factory component page (tier=lcsc) · Ray 2h ago
lm311dr-cn-etched.step lm311dr-cn: factory component page (tier=lcsc) · Ray 2h ago
lm311dr-cn-hero.glb lm311dr-cn: hero GLB from the etched model (keeps the MPN mark) · Ray 2h ago
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LM311DR-CN

ChipNobo · Comparators · SOP-8

LM311DR-CN from ChipNobo, 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 EMIT OUT output Emitter output of the open-emitter output transistor; voltage from emitter output to VCC- is limited to 30 V maximum.
2 IN+ input Non-inverting comparator input; input voltage is limited to ±15 V and differential input voltage to ±30 V.
3 IN- input Inverting comparator input; input voltage is limited to ±15 V and differential input voltage to ±30 V.
4 VCC- power_in Negative supply (ground in single-supply operation); dual supply is ±1.75 V to ±15 V recommended, ±18 V absolute maximum.
5 BALANCE input Offset balance input used for input offset adjustment.
6 BAL/STRB input Balance/strobe input; if the strobe is low the output is off regardless of differential input, and it must be current driven at -3 mA to -5 mA, never shorted to ground.
7 COL OUT output Open-collector output that can switch up to 40 V at 50 mA and can be wire-OR connected; voltage from collector output to VCC- is 40 V maximum.
8 VCC+ power_in Positive supply; single supply is 3.5 V to 30 V recommended, 36 V absolute maximum.

Key specifications

Parameter Value
Manufacturer ChipNobo
Package SOP-8
Category Amplifiers/Comparators
Pins 8

CAD (KiCad official)

  • Symbol: LM311DR-CN
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: lm311dr-cn-etched.step / lm311dr-cn-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm311dr-cn.step / lm311dr-cn.glb are the bare package body.

Provenance

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

  • Datasheet: ChipNobo datasheet (6 pp, sha256 19797b9635eb3523, retrieved 2026-10-09, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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