component
SN74AHCT139DR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, SOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownSN74AHCT139DR
Texas Instruments · Signal Switches, Multiplexers, Decoders · SOP-16
SN74AHCT139DR from Texas Instruments, in a SOP-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 | 1G | input | Active-low enable input for decoder 1 that disables all Y0-Y3 outputs when high or enables decoder output selection via inputs 1A and 1B when low (VIH≥2V, VIL≤0.8V). |
| 2 | 1A | input | Select input A for decoder 1 that, in combination with 1B, determines which output Y0-Y3 is driven low when enable input 1G is low (VIH≥2V, VIL≤0.8V). |
| 3 | 1B | input | Select input B for decoder 1 that, in combination with 1A, determines which output Y0-Y3 is driven low when enable input 1G is low (VIH≥2V, VIL≤0.8V). |
| 4 | 1Y0 | output | Active-low output Y0 for decoder 1, driven low when 1G=low, 1A=low, and 1B=low (max IOL=8mA, max VOL=0.44V). |
| 5 | 1Y1 | output | Active-low output Y1 for decoder 1, driven low when 1G=low, 1A=high, and 1B=low (max IOL=8mA, max VOL=0.44V). |
| 6 | 1Y2 | output | Active-low output Y2 for decoder 1, driven low when 1G=low, 1A=low, and 1B=high (max IOL=8mA, max VOL=0.44V). |
| 7 | 1Y3 | output | Active-low output Y3 for decoder 1, driven low when 1G=low, 1A=high, and 1B=high (max IOL=8mA, max VOL=0.44V). |
| 8 | GND | power_in | Ground connection providing 0V reference for the device. |
| 9 | 2Y3 | output | Active-low output Y3 for decoder 2, driven low when 2G=low, 2A=high, and 2B=high (max IOL=8mA, max VOL=0.44V). |
| 10 | 2Y2 | output | Active-low output Y2 for decoder 2, driven low when 2G=low, 2A=low, and 2B=high (max IOL=8mA, max VOL=0.44V). |
| 11 | 2Y1 | output | Active-low output Y1 for decoder 2, driven low when 2G=low, 2A=high, and 2B=low (max IOL=8mA, max VOL=0.44V). |
| 12 | 2Y0 | output | Active-low output Y0 for decoder 2, driven low when 2G=low, 2A=low, and 2B=low (max IOL=8mA, max VOL=0.44V). |
| 13 | 2B | input | Select input B for decoder 2 that, in combination with 2A, determines which output Y0-Y3 is driven low when enable input 2G is low (VIH≥2V, VIL≤0.8V). |
| 14 | 2A | input | Select input A for decoder 2 that, in combination with 2B, determines which output Y0-Y3 is driven low when enable input 2G is low (VIH≥2V, VIL≤0.8V). |
| 15 | 2G | input | Active-low enable input for decoder 2 that disables all Y0-Y3 outputs when high or enables decoder output selection via inputs 2A and 2B when low (VIH≥2V, VIL≤0.8V). |
| 16 | VCC | power_in | Supply voltage for the device; 4.5V to 5.5V nominal operation per AHCT design specification. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOP-16 |
| Category | Logic |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
SN74AHCT139DR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOP-16 (KiCad packages3D, STEP)
- 3D model files:
sn74ahct139dr-etched.step/sn74ahct139dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ahct139dr.step/sn74ahct139dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (20 pp, sha256
e75cb61da2840c39, retrieved 2026-09-24, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).