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SN74LS145DR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, 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
markdownSN74LS145DR
Texas Instruments · Signal Switches, Multiplexers, Decoders · SOIC-16
SN74LS145DR 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 | 0 | output | Open-collector output 0, active low (on) for BCD input 0000, 15 V off-state rating and 80 mA sink capability. |
| 2 | 1 | output | Open-collector output 1, active low (on) for BCD input 0001, 15 V off-state rating and 80 mA sink capability. |
| 3 | 2 | output | Open-collector output 2, active low (on) for BCD input 0010, 15 V off-state rating and 80 mA sink capability. |
| 4 | 3 | output | Open-collector output 3, active low (on) for BCD input 0011, 15 V off-state rating and 80 mA sink capability. |
| 5 | 4 | output | Open-collector output 4, active low (on) for BCD input 0100, 15 V off-state rating and 80 mA sink capability. |
| 6 | 5 | output | Open-collector output 5, active low (on) for BCD input 0101, 15 V off-state rating and 80 mA sink capability. |
| 7 | 6 | output | Open-collector output 6, active low (on) for BCD input 0110, 15 V off-state rating and 80 mA sink capability. |
| 8 | GND | power_in | Ground terminal; all voltage values are referenced to it. |
| 9 | 7 | output | Open-collector output 7, active low (on) for BCD input 0111, 15 V off-state rating and 80 mA sink capability. |
| 10 | 8 | output | Open-collector output 8, active low (on) for BCD input 1000, 15 V off-state rating and 80 mA sink capability. |
| 11 | 9 | output | Open-collector output 9, active low (on) for BCD input 1001, 15 V off-state rating and 80 mA sink capability. |
| 12 | D | input | BCD input D (most significant bit), one Series 74LS standard load, 5.5 V max input voltage. |
| 13 | C | input | BCD input C, one Series 74LS standard load, 5.5 V max input voltage. |
| 14 | B | input | BCD input B, one Series 74LS standard load, 5.5 V max input voltage. |
| 15 | A | input | BCD input A (least significant bit), one Series 74LS standard load, 5.5 V max input voltage. |
| 16 | VCC | power_in | Supply voltage, 7 V absolute maximum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Logic |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
SN74LS145DR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files:
sn74ls145dr-etched.step/sn74ls145dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ls145dr.step/sn74ls145dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (18 pp, sha256
a973c320238235be, retrieved 2026-10-21, 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).