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SN74LS85DR
Public Made by Adomby adom
Texas Instruments Digital Comparators, SOIC-16. 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
markdownSN74LS85DR
Texas Instruments · Digital Comparators · SOIC-16
SN74LS85DR from Texas Instruments, in a SOIC-16. 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 | B3 | input | Word B comparing input, bit 3 (most significant bit). |
| 2 | A<Bin | input | Cascading input A<B from the less-significant stage. |
| 3 | A=Bin | input | Cascading input A=B from the less-significant stage; must be held high on the stage handling the least-significant bits. |
| 4 | A>Bin | input | Cascading input A>B from the less-significant stage. |
| 5 | A>Bout | output | Output that goes high when word A is greater than word B. |
| 6 | A=Bout | output | Output that goes high when word A equals word B. |
| 7 | A<Bout | output | Output that goes high when word A is less than word B. |
| 8 | GND | power_in | Ground. |
| 9 | B0 | input | Word B comparing input, bit 0 (least significant bit). |
| 10 | A0 | input | Word A comparing input, bit 0 (least significant bit). |
| 11 | B1 | input | Word B comparing input, bit 1. |
| 12 | A1 | input | Word A comparing input, bit 1. |
| 13 | A2 | input | Word A comparing input, bit 2. |
| 14 | B2 | input | Word B comparing input, bit 2. |
| 15 | A3 | input | Word A comparing input, bit 3 (most significant bit). |
| 16 | VCC | power_in | Supply voltage. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Logic |
| Pins | 16 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating free-air temperature range (ordering table, SN74LS85DR) | 0 | 70 | °C | Op temp column of Package Option Addendum for SN74LS85DR (SOIC D 16) | 9 |
CAD (KiCad official)
- Symbol:
SN74LS85DR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files:
sn74ls85dr-etched.step/sn74ls85dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ls85dr.step/sn74ls85dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (23 pp, sha256
0af6f0e90f511213, retrieved 2026-10-18, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).