component
CD74HCT85M
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
markdownCD74HCT85M
Texas Instruments · Digital Comparators · SOIC-16
CD74HCT85M 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 | Most significant bit of word B; HCT input with VIL 0.8 V max and VIH 2 V min. |
| 2 | (A < B) IN | input | Cascading input for the A < B result from a lower-order comparator, used for serial or parallel expansion. |
| 3 | (A = B) IN | input | Cascading input for the A = B result from a lower-order comparator, used for serial or parallel expansion. |
| 4 | (A > B) IN | input | Cascading input for the A > B result from a lower-order comparator, used for serial or parallel expansion. |
| 5 | (A > B) OUT | output | Buffered output that goes high when word A is greater than word B, with fanout of 10 LSTTL loads. |
| 6 | (A = B) OUT | output | Buffered output that goes high when word A equals word B, with fanout of 10 LSTTL loads. |
| 7 | (A < B) OUT | output | Buffered output that goes high when word A is less than word B, with fanout of 10 LSTTL loads. |
| 8 | GND | power_in | Ground reference; continuous current through VCC or GND is limited to ±50 mA. |
| 9 | B0 | input | Least significant bit of word B. |
| 10 | A0 | input | Least significant bit of word A. |
| 11 | B1 | input | Bit 1 of word B. |
| 12 | A1 | input | Bit 1 of word A. |
| 13 | A2 | input | Bit 2 of word A. |
| 14 | B2 | input | Bit 2 of word B. |
| 15 | A3 | input | Most significant bit of word A. |
| 16 | VCC | power_in | Supply voltage, 4.5 V to 5.5 V for HCT types, with a 0.1 µF bypass capacitor recommended close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Logic |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
CD74HCT85M - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files:
cd74hct85m-etched.step/cd74hct85m-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cd74hct85m.step/cd74hct85m.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (27 pp, sha256
1a8b9d560ba6e590, retrieved 2026-11-05, 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).