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SN74HC42DR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, SOIC-16. Datasheet-verified pinout, 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
markdownSN74HC42DR
Texas Instruments · Signal Switches, Multiplexers, Decoders · SOIC-16
SN74HC42DR from Texas Instruments, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 0 | output | Decimal output 0, asserts low for BCD input 0000, high for all other values |
| 2 | 1 | output | Decimal output 1, asserts low for BCD input 0001, high for all other values |
| 3 | 2 | output | Decimal output 2, asserts low for BCD input 0010, high for all other values |
| 4 | 3 | output | Decimal output 3, asserts low for BCD input 0011, high for all other values |
| 5 | 4 | output | Decimal output 4, asserts low for BCD input 0100, high for all other values |
| 6 | 5 | output | Decimal output 5, asserts low for BCD input 0101, high for all other values |
| 7 | 6 | output | Decimal output 6, asserts low for BCD input 0110, high for all other values |
| 8 | GND | power_in | Ground (0 V reference) |
| 9 | 7 | output | Decimal output 7, asserts low for BCD input 0111, high for all other values |
| 10 | 8 | output | Decimal output 8, asserts low for BCD input 1000, high for all other values |
| 11 | 9 | output | Decimal output 9, asserts low for BCD input 1001, high for all other values |
| 12 | D | input | BCD input D (most significant bit), accepts 0 to VCC |
| 13 | C | input | BCD input C, accepts 0 to VCC |
| 14 | B | input | BCD input B, accepts 0 to VCC |
| 15 | A | input | BCD input A (least significant bit), accepts 0 to VCC |
| 16 | VCC | power_in | Supply voltage, 2 to 6 V |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Logic |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
SN74HC42DR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files:
sn74hc42dr-etched.step/sn74hc42dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc42dr.step/sn74hc42dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (15 pp, sha256
7f37d9594915ee51, retrieved 2026-09-21, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).