component

LM331P

Public Made by Adom

by adom

Sungine V/F And F/V Converters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentdata acquisitionlm331pfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 3d ago
viewers lm331p: viewers · Ray 3d ago
lm331p-etched.glb Publish 0.1.0 · Ray 3d ago
lm331p-etched.step lm331p: factory component page (tier=lcsc) · Ray 3d ago
lm331p-hero.glb lm331p: hero GLB from the etched model (keeps the MPN mark) · Ray 3d ago
lm331p-hero.overlay.json Publish 0.1.0 · Ray 3d ago
lm331p.glb Publish 0.1.0 · Ray 3d ago
lm331p.kicad_mod Publish 0.1.0 · Ray 3d ago
lm331p.kicad_sym Publish 0.1.0 · Ray 3d ago
lm331p.lbr Publish 0.1.0 · Ray 3d ago
lm331p.step Publish 0.1.0 · Ray 3d ago
package.json Publish 0.1.0 · Ray 3d ago
page.json Set visibility: public · Ray 3d ago
README.md Publish 0.1.0 · Ray 3d ago

LM331P

Sungine · V/F And F/V Converters · SOP-8

LM331P from Sungine, 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 CURO output Current output (switched current source output, flows to pin 1 or GND depending on RS flip-flop state; current range 10 to 500 µA).
2 REFCUR output Reference current pin held at 1.9V (1.70 to 2.08V) by the charge pump, setting i = 1.9V/Rs (135 µA at Rs = 14k); do not draw current from it.
3 FOUT output Frequency output driver transistor with about 50 ohm saturation resistance, output current limited below 50 mA and tolerates up to 40V.
4 GND power_in Ground.
5 R/C input Timing comparator input for external Rt/Ct, threshold 2/3 of VS (0.667 typ) that resets the RS flip-flop.
6 THD input Input comparator inverting input; comparator triggers timer when pin 7 voltage is higher than pin 6.
7 COM I input Input comparator non-inverting input with bias current of -80 nA typ, common-mode range -0.2V to VCC-2.0V.
8 VS power_in Power supply, 4.0V to 40V operating (absolute maximum 40V).

Key specifications

Parameter Value
Manufacturer Sungine
Package SOP-8
Category Data Acquisition
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
VFC nonlinearity -0.01 0.003 0.01 % full scale 4.5V≤VS≤20V 4
VFC nonlinearity over temperature -0.02 0.006 0.02 % full scale TMIN≤TA≤TMAX 4
VFC nonlinearity (Fig 3) -0.14 0.024 0.14 % full scale VS=15V, f=10~11kHz 4
Conversion accuracy scale factor 0.9 1 1.1 kHz/V VIN=-10V, RS=14kΩ 4
Gain temperature stability LM331 -150 30 150 ppm/℃ TMIN≤TA≤TMAX, 4.5V≤VS≤20V 4
Gain change with VS (4.5V-10V) 0.01 0.1 %/V 4.5V≤VS≤10V 4
Gain change with VS (10V-40V) 0.006 0.06 %/V 10V≤VS≤40V 4
Rated full-scale frequency 10 kHz VIN=-10V 4
Long-term gain stability (1000 h) 0.02 % full scale TMIN≤TA≤TMAX 4
Overrange frequency 10 % VIN=-11V 4
Input comparator offset voltage LM331 -14 4 14 mV TMIN≤TA≤TMAX 4
Input comparator bias current -80 -300 nA 4
Input comparator offset current -100 8 100 nA 4
Input comparator common-mode range -0.2 V TMIN≤TA≤TMAX; max VCC-2.0 4
Timer threshold voltage (pin 5) 0.63 0.667 0.7 *VS 4
Timer input bias current (pin 5), all drive -100 10 100 nA VS=15V, 0V≤Vpin5≤9.9V, all drive 4
Timer input bias current (pin 5) LM1/2/331 200 1000 nA Vpin5=10V, LM1/2/331 4
VSAT (pin 5 reset) VSAT 0.22 0.5 V I=5mA 4
Current source output current (pin 1) 116 136 156 µA RS=14kΩ, VPIN1=0 5
Change in output current with voltage 0.2 1 µA 0V≤VPIN1≤10V 5
Current source off leakage 0.02 10 nA 5
Current source off leakage at TMAX 2 50 nA TA=TMAX, all drive 5
Operating current range 10 500 µA 5
Reference voltage (pin 2) 1.7 1.89 2.08 VDC 5
Reference voltage temperature stability 60 ppm/℃ 5
Reference voltage time stability (1000 h) 0.1 % 1000 hours 5
Logic output VSAT (pin 3) VSAT 0.15 0.5 V I=5mA 5
Logic output VSAT, 2 TTL loads VSAT 0.1 0.4 V I=3.2mA (2 TTL loads), TMIN≤TA≤TMAX 5
Logic output off leakage -1 0.05 1 µA 5
Supply current 1.5 3 6 mA VS=5V 5
Supply current 2 4 8 mA VS=40V 5
Supply voltage VS 40 V 3
Input voltage -0.2 V max Vs 3
Operating temperature range LM331 0 70 ℃ LM331 3
Power dissipation 1.25 W 25℃ 3
Soldering temperature 260 ℃ spot soldering, 10 seconds 3
Operating supply voltage VS 4 40 V conditions for tables 1 and 2 5

CAD (KiCad official)

  • Symbol: LM331P
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: lm331p-etched.step / lm331p-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm331p.step / lm331p.glb are the bare package body.

Provenance

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

  • Datasheet: Sungine datasheet (12 pp, sha256 20bc1d95008650ea, retrieved 2026-10-23, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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