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MC74AC138DTR2G
Public Made by Adomby adom
onsemi Signal Switches, Multiplexers, Decoders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
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PCB Footprint
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Datasheet
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README
markdownMC74AC138DTR2G
onsemi · Signal Switches, Multiplexers, Decoders · TSSOP-16
MC74AC138DTR2G from onsemi, in a TSSOP-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 | A0 | input | Address input A0, the least significant of the three binary-weighted address inputs (A0-A2) that select one of eight active-LOW outputs. |
| 2 | A1 | input | Address input A1, one of three binary-weighted address inputs (A0-A2) that select one of eight active-LOW outputs. |
| 3 | A2 | input | Address input A2, the most significant of the three binary-weighted address inputs (A0-A2) that select one of eight active-LOW outputs. |
| 4 | E1 | input | Active-LOW enable input; all outputs stay HIGH unless E1 and E2 are LOW and E3 is HIGH. |
| 5 | E2 | input | Active-LOW enable input; all outputs stay HIGH unless E1 and E2 are LOW and E3 is HIGH. |
| 6 | E3 | input | Active-HIGH enable input; all outputs stay HIGH unless E1 and E2 are LOW and E3 is HIGH. |
| 7 | O7 | output | Active-LOW mutually exclusive output 7 that sources/sinks 24 mA, driven LOW only when the address is 111 and the device is enabled. |
| 8 | GND | power_in | Ground pin (0 V reference) for the supply. |
| 9 | O6 | output | Active-LOW mutually exclusive output 6 that sources/sinks 24 mA, driven LOW only when the address is 110 and the device is enabled. |
| 10 | O5 | output | Active-LOW mutually exclusive output 5 that sources/sinks 24 mA, driven LOW only when the address is 101 and the device is enabled. |
| 11 | O4 | output | Active-LOW mutually exclusive output 4 that sources/sinks 24 mA, driven LOW only when the address is 100 and the device is enabled. |
| 12 | O3 | output | Active-LOW mutually exclusive output 3 that sources/sinks 24 mA, driven LOW only when the address is 011 and the device is enabled. |
| 13 | O2 | output | Active-LOW mutually exclusive output 2 that sources/sinks 24 mA, driven LOW only when the address is 010 and the device is enabled. |
| 14 | O1 | output | Active-LOW mutually exclusive output 1 that sources/sinks 24 mA, driven LOW only when the address is 001 and the device is enabled. |
| 15 | O0 | output | Active-LOW mutually exclusive output 0 that sources/sinks 24 mA, driven LOW only when the address is 000 and the device is enabled. |
| 16 | VCC | power_in | Positive supply; recommended 2.0 V to 6.0 V for 'AC and 4.5 V to 5.5 V for 'ACT, absolute maximum 7.0 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TSSOP-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 |
|---|---|---|---|---|---|---|---|
| Input High Level Voltage | VIH | 2.1 | 1.5 | V | VCC=3.0 V; VOUT=0.1 V or VCC-0.1 V | 5 | |
| Input High Level Voltage | VIH | 3.15 | 2.25 | V | VCC=4.5 V; VOUT=0.1 V or VCC-0.1 V | 5 | |
| Input High Level Voltage | VIH | 3.85 | 2.75 | V | VCC=5.5 V; VOUT=0.1 V or VCC-0.1 V | 5 | |
| Input Low Level Voltage | VIL | 1.5 | 0.9 | V | VCC=3.0 V; VOUT=0.1 V or VCC-0.1 V | 5 | |
| Input Low Level Voltage | VIL | 2.25 | 1.35 | V | VCC=4.5 V; VOUT=0.1 V or VCC-0.1 V | 5 | |
| Input Low Level Voltage | VIL | 2.75 | 1.65 | V | VCC=5.5 V; VOUT=0.1 V or VCC-0.1 V | 5 | |
| Minimum High Level Output Voltage | VOH | 2.9 | 2.99 | V | VCC=3.0 V; IOUT=-50 uA | 5 | |
| Minimum High Level Output Voltage | VOH | 4.4 | 4.49 | V | VCC=4.5 V; IOUT=-50 uA | 5 | |
| Minimum High Level Output Voltage | VOH | 5.4 | 5.49 | V | VCC=5.5 V; IOUT=-50 uA | 5 | |
| Minimum High Level Output Voltage | VOH | 2.46 | V | VCC=3.0 V; VIN=VIL or VIH; IOH=-12 mA | 5 | ||
| Minimum High Level Output Voltage | VOH | 3.76 | V | VCC=4.5 V; VIN=VIL or VIH; IOH=-24 mA | 5 | ||
| Minimum High Level Output Voltage | VOH | 4.76 | V | VCC=5.5 V; VIN=VIL or VIH; IOH=-24 mA | 5 | ||
| Maximum Low Level Output Voltage | VOL | 0.002 | 0.1 | V | VCC=3.0 V; IOUT=50 uA | 5 | |
| Maximum Low Level Output Voltage | VOL | 0.001 | 0.1 | V | VCC=4.5 V; IOUT=50 uA | 5 | |
| Maximum Low Level Output Voltage | VOL | 0.44 | V | VCC=3.0 V; VIN=VIL or VIH; IOL=12 mA | 5 | ||
| Maximum Input Leakage Current | IIN | -1 | 1 | uA | VI = VCC, GND | 5 | |
| Minimum Dynamic Output Current | IOLD | 75 | mA | VOLD = 1.65 V Max | 5 | ||
| Minimum Dynamic Output Current | IOHD | -75 | mA | VOHD = 3.85 V Min | 5 | ||
| Maximum Quiescent Supply Current | ICC | 80 | uA | VCC=5.5 V; VIN = VCC or GND | 5 | ||
| Propagation Delay An to On (tPLH) | tPLH | 1.5 | 8.5 | 15 | ns | VCC=3.3 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay An to On (tPLH) | tPLH | 1.5 | 6.5 | 10.5 | ns | VCC=5.0 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay An to On (tPHL) | tPHL | 1.5 | 8 | 14 | ns | VCC=3.3 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay An to On (tPHL) | tPHL | 1.5 | 6 | 10.5 | ns | VCC=5.0 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay E1 or E2 to On (tPLH) | tPLH | 1.5 | 11 | 16 | ns | VCC=3.3 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay E1 or E2 to On (tPLH) | tPLH | 1.5 | 8 | 12 | ns | VCC=5.0 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay E1 or E2 to On (tPHL) | tPHL | 1.5 | 9.5 | 15 | ns | VCC=3.3 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay E1 or E2 to On (tPHL) | tPHL | 1.5 | 7 | 10.5 | ns | VCC=5.0 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay E3 to On (tPLH) | tPLH | 1.5 | 11 | 16.5 | ns | VCC=3.3 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay E3 to On (tPLH) | tPLH | 1.5 | 8 | 12.5 | ns | VCC=5.0 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay E3 to On (tPHL) | tPHL | 1.5 | 8.5 | 14 | ns | VCC=3.3 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| Propagation Delay E3 to On (tPHL) | tPHL | 1 | 6 | 9.5 | ns | VCC=5.0 V; CL=50 pF; TA=-40 to +85 C; Fig 3-6 | 5 |
| DC Supply Voltage (AC) | VCC | 2 | 5 | 6 | V | 'AC devices | 4 |
| Operating Ambient Temperature Range | TA | -40 | 25 | 85 | °C | 4 | |
| Junction Temperature (PDIP) | TJ | 140 | °C | PDIP as printed | 4 | ||
| Output Current High | IOH | -24 | mA | 4 | |||
| Output Current Low | IOL | 24 | mA | 4 | |||
| Input Rise and Fall Time (AC, non-Schmitt) | tr, tf | 150 | ns/V | VCC @ 3.0 V | 4 | ||
| Input Rise and Fall Time (AC, non-Schmitt) | tr, tf | 40 | ns/V | VCC @ 4.5 V | 4 | ||
| Input Rise and Fall Time (AC, non-Schmitt) | tr, tf | 25 | ns/V | VCC @ 5.5 V | 4 | ||
| DC Supply Voltage | VCC | -0.5 | 7 | V | 4 | ||
| DC Input Voltage | VI | -0.5 | V | -0.5 V to VCC+0.5 V | 4 | ||
| DC Output Voltage | VO | -0.5 | V | Note 1; -0.5 V to VCC+0.5 V | 4 | ||
| DC Input Diode Current | IIK | 20 | mA | 4 | |||
| DC Output Diode Current | IOK | 50 | mA | 4 | |||
| DC Output Sink/Source Current | IO | 50 | mA | 4 | |||
| DC Supply Current per Output Pin | ICC | 50 | mA | 4 | |||
| DC Ground Current per Output Pin | IGND | 50 | mA | 4 | |||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 4 | ||
| Lead Temperature | TL | 260 | °C | 1 mm from case for 10 seconds | 4 | ||
| Junction Temperature under Bias | TJ | 150 | °C | 4 | |||
| ESD Withstand Voltage Human Body Model | VESD | 2000 | V | HBM; printed as > 2000 V | 4 | ||
| Latch-Up Performance | ILatch-Up | 100 | mA | Above VCC and below GND at 85°C | 4 | ||
| Thermal Resistance Junction-to-Ambient | JA | 103.8 | °C/W | TSSOP package; JESD51-7 | 4 | ||
| Power Dissipation in Still Air at 65°C | PD | 500 | mW | TSSOP package; still air at 65°C | 4 |
CAD (KiCad official)
- Symbol:
MC74AC138DTR2G - Footprint:
Package_SO:TSSOP-16_4.4x5mm_P0.65mm - 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files:
mc74ac138dtr2g-etched.step/mc74ac138dtr2g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mc74ac138dtr2g.step/mc74ac138dtr2g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (10 pp, sha256
88a716fef04e65ac, retrieved 2026-10-20, 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).