component
LM331AN
Public Made by Adomby adom
Texas Instruments V/F And F/V Converters, PDIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
← Commit history
README.mdadded+44@@ -0,0 +1,44 @@+# LM331AN++**Texas Instruments** · V/F And F/V Converters · PDIP-8++LM331AN from Texas Instruments, in a PDIP-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 | IOUT | output | Current output of the switched current source, which supplies i = 1.90 V/RS to the timing network and is specified at 116 to 156 µA for LM331AN at RS = 14 kΩ with pin 1 at 0 V (136 µA typical). |+| 2 | IREF | input | Reference current input where the internal band-gap regulates the pin voltage to about 1.9 V (1.7 to 2.08 V for LM331) and the set resistor RS defines the current, with an operating range of 10 to 500 µA. |+| 3 | FOUT | output | Frequency output that is an open-collector output requiring a pullup resistor, with a saturation voltage of 0.5 V maximum at 5 mA and an OFF leakage of 1 µA maximum. |+| 4 | GND | power_in | Ground reference for the device; all voltages are measured with respect to GND = 0 V. |+| 5 | RC | input | R-C filter input connected to the external RtCt timing network, where the timer threshold is 0.63 to 0.7 × VS (0.667 × VS typical) and the reset saturation voltage is 0.5 V maximum at 5 mA. |+| 6 | THRESH | input | Threshold input to the input comparator, which compares it against COMPIN (pin 7), with a common-mode range of −0.2 V to VCC − 2 V and offset voltage of ±10 mV maximum for LM331 (±14 mV over temperature). |+| 7 | COMPIN | input | Comparator input for the signal voltage VIN, which the input comparator compares against THRESH (pin 6), with a bias current of −300 nA maximum and an offset current of ±100 nA maximum. |+| 8 | VS | power_in | Supply voltage, specified over 4 V to 40 V with an absolute maximum of 40 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | PDIP-8 |+| Category | Data Acquisition |+| Pins | 8 |++## CAD (KiCad official)++- Symbol: `LM331AN`+- Footprint: `Package_DIP:DIP-8_W7.62mm`+- 3D model: PDIP-8 (KiCad packages3D, STEP)+- 3D model files: `lm331an-etched.step` / `lm331an-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm331an.step` / `lm331an.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm231) (24 pp, sha256 `a5847f55707c2947`, retrieved 2026-10-08, 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/lm331an-datasheet.pdf)
page.jsonadded+201@@ -0,0 +1,201 @@+{+ "slug": "lm331an",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments V/F And F/V Converters, PDIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "data acquisition",+ "lm331an",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "lm331an.kicad_sym",+ "lm331an.kicad_mod",+ "lm331an.glb",+ "lm331an.step",+ "lm331an.lbr",+ "docs/hero.png",+ "docs/lm331an-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html",+ "lm331an-hero.glb",+ "lm331an-hero.overlay.json"+ ],+ "component": {+ "mpn": "LM331AN",+ "manufacturer": "Texas Instruments",+ "package": "PDIP-8",+ "pin_count": 8,+ "category": "Data Acquisition",+ "subcategory": "V/F And F/V Converters",+ "datasheet": "https://www.ti.com/cn/lit/gpn/lm231",+ "parts": {+ "symbol": "lm331an.kicad_sym",+ "footprint": "lm331an.kicad_mod",+ "model_3d": "lm331an-hero.glb",+ "model_3d_plain": "lm331an.glb",+ "model_3d_step": "lm331an-etched.step",+ "model_3d_step_plain": "lm331an.step",+ "lbr": "lm331an.lbr"+ },+ "distributor_links": {+ "lcsc": "C1519434",+ "digikey": "LM331AN-ND",+ "mouser": "926-LM331AN"+ },+ "distributor_check": {+ "checked_at": "2026-10-08T13:56:20Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "LM331AN-ND",+ "status": "found",+ "lifecycle": "Obsolete"+ },+ "mouser": {+ "pn": "926-LM331AN",+ "status": "found",+ "lifecycle": "Obsolete"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "IOUT",+ "type": "output",+ "description": "Current output of the switched current source, which supplies i = 1.90 V/RS to the timing network and is specified at 116 to 156 µA for LM331AN at RS = 14 kΩ with pin 1 at 0 V (136 µA typical)."+ },+ {+ "number": "2",+ "name": "IREF",+ "type": "input",+ "description": "Reference current input where the internal band-gap regulates the pin voltage to about 1.9 V (1.7 to 2.08 V for LM331) and the set resistor RS defines the current, with an operating range of 10 to 500 µA."+ },+ {+ "number": "3",+ "name": "FOUT",+ "type": "output",+ "description": "Frequency output that is an open-collector output requiring a pullup resistor, with a saturation voltage of 0.5 V maximum at 5 mA and an OFF leakage of 1 µA maximum."+ },+ {+ "number": "4",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference for the device; all voltages are measured with respect to GND = 0 V."+ },+ {+ "number": "5",+ "name": "RC",+ "type": "input",+ "description": "R-C filter input connected to the external RtCt timing network, where the timer threshold is 0.63 to 0.7 × VS (0.667 × VS typical) and the reset saturation voltage is 0.5 V maximum at 5 mA."+ },+ {+ "number": "6",+ "name": "THRESH",+ "type": "input",+ "description": "Threshold input to the input comparator, which compares it against COMPIN (pin 7), with a common-mode range of −0.2 V to VCC − 2 V and offset voltage of ±10 mV maximum for LM331 (±14 mV over temperature)."+ },+ {+ "number": "7",+ "name": "COMPIN",+ "type": "input",+ "description": "Comparator input for the signal voltage VIN, which the input comparator compares against THRESH (pin 6), with a bias current of −300 nA maximum and an offset current of ±100 nA maximum."+ },+ {+ "number": "8",+ "name": "VS",+ "type": "power_in",+ "description": "Supply voltage, specified over 4 V to 40 V with an absolute maximum of 40 V."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-5-5",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "extractor flagged: Package and part mapping: LM331AN is listed in the orderable addendum (page 20) as LM331AN/NOPB and ; Page 18 contains a garbled pin label list (COMP-OUT, RC_TIME, LOAD, VINF, GND) that does not match t; Pin 5 is named 'RC' in the page 4 table, described there as 'R-C filter input', while the functional"+ ],+ "pages_sent": 24,+ "cost_usd": 0.0799,+ "at": "2026-10-08T13:56:06"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/lm231",+ "pages": 24,+ "sha256": "a5847f55707c2947",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 8,+ "described": 8,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ },+ "models_3d": [+ {+ "file": "lm331an.step",+ "role": "plain",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "body on z = 0, through-hole leads below",+ "extents_mm": [+ 7.874,+ 9.27,+ 6.98+ ],+ "zmin_mm": -3.3,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "4a377a56a8d9e9c0b86c095ef9ecc1869ac19e7f5069a3247b294250bf4f235d",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ },+ {+ "file": "lm331an-etched.step",+ "role": "eda",+ "up": "Z",+ "units": "mm",+ "origin": "footprint origin = pad-pattern centre",+ "seat": "body on z = 0, through-hole leads below",+ "extents_mm": [+ 7.874,+ 9.27,+ 6.98+ ],+ "zmin_mm": -3.3,+ "centre_offset_mm": 0,+ "footprint_binding": "identity",+ "sha256": "c0c000fe60ec2ac4c95a0c5c604397b9f83f763b5ccf6f9fdf83d28009694413",+ "checked": "2026-10-08",+ "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"+ }+ ]+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}