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MC74VHC138DTR2G
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
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMC74VHC138DTR2G
onsemi · Signal Switches, Multiplexers, Decoders · TSSOP-16
MC74VHC138DTR2G 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 | Binary select input A0 of the 3-to-8 decoder; inputs tolerate up to 7 V and must be held within GND to VCC or tied to a logic level when unused. |
| 2 | A1 | input | Binary select input A1 of the 3-to-8 decoder; inputs tolerate up to 7 V and must be held within GND to VCC or tied to a logic level when unused. |
| 3 | A2 | input | Binary select input A2 of the 3-to-8 decoder; inputs tolerate up to 7 V and must be held within GND to VCC or tied to a logic level when unused. |
| 4 | E1 | input | Active-high enable input; when E1 is held High the decoding function is inhibited and all outputs go High. |
| 5 | E2 | input | Active-high enable input; when E2 is held High the decoding function is inhibited and all outputs go High. |
| 6 | E3 | input | Active-low enable input; when E3 is held Low the decoding function is inhibited and all outputs go High. |
| 7 | Y7 | output | Active-low decoded output Y7, driven by a buffer stage that goes Low when the address is 111 with the device enabled. |
| 8 | GND | power_in | Ground reference for the device; Vin and Vout must stay within GND to VCC. |
| 9 | Y6 | output | Active-low decoded output Y6, goes Low when the address is 110 with the device enabled. |
| 10 | Y5 | output | Active-low decoded output Y5, goes Low when the address is 101 with the device enabled. |
| 11 | Y4 | output | Active-low decoded output Y4, goes Low when the address is 100 with the device enabled. |
| 12 | Y3 | output | Active-low decoded output Y3, goes Low when the address is 011 with the device enabled. |
| 13 | Y2 | output | Active-low decoded output Y2, goes Low when the address is 010 with the device enabled. |
| 14 | Y1 | output | Active-low decoded output Y1, goes Low when the address is 001 with the device enabled. |
| 15 | Y0 | output | Active-low decoded output Y0, goes Low when the address is 000 with the device enabled. |
| 16 | VCC | power_in | Positive supply; the datasheet specifies a DC supply range of 2.0 V to 5.5 V and absolute maximum of -0.5 V to 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 |
|---|---|---|---|---|---|---|---|
| DC Supply Voltage | VCC | 2 | 5.5 | V | 4 | ||
| DC Input Voltage | Vin | 0 | 5.5 | V | 4 | ||
| DC Output Voltage | Vout | 0 | V | maximum printed as VCC | 4 | ||
| Operating Temperature | TA | -55 | 125 | °C | 4 | ||
| Input Rise and Fall Time | tr, tf | 0 | 100 | ns/V | VCC = 3.3V ±0.3V | 4 | |
| Input Rise and Fall Time | tr, tf | 0 | 20 | ns/V | VCC = 5.0V ±0.5V | 4 | |
| DC Supply Voltage | VCC | -0.5 | 7 | V | 4 | ||
| DC Input Voltage | Vin | -0.5 | 7 | V | 4 | ||
| DC Output Voltage | Vout | -0.5 | V | maximum printed as VCC + 0.5 | 4 | ||
| Input Diode Current | IIK | -20 | mA | printed as −20 with no range | 4 | ||
| Output Diode Current | IOK | -20 | 20 | mA | 4 | ||
| DC Output Current, per Pin | Iout | -25 | 25 | mA | 4 | ||
| DC Supply Current, VCC and GND Pins | ICC | -75 | 75 | mA | 4 | ||
| Power Dissipation in Still Air, TSSOP Package | PD | 450 | mW | TSSOP package, still air | 4 | ||
| Storage Temperature | Tstg | -65 | 150 | °C | 4 | ||
| Derating, TSSOP Package | -6.1 | mW/C | TSSOP package, from 65 to 125C | 4 | |||
| Maximum Quiescent Supply Current | ICC | 4 | μA | VCC = 5.5 V; VIN = VCC or GND; TA = 25°C | 5 | ||
| Maximum Quiescent Supply Current | ICC | 40 | μA | VCC = 5.5 V; VIN = VCC or GND; TA = 125°C (≤125°C column) | 5 | ||
| Maximum Input Leakage Current | IIN | -0.1 | 0.1 | μA | VIN = 5.5 V or GND; VCC = 0 to 5.5 V; TA = 25°C | 5 | |
| Maximum Input Leakage Current | IIN | -1 | 1 | μA | VIN = 5.5 V or GND; VCC = 0 to 5.5 V; TA = 125°C (≤125°C column) | 5 | |
| Minimum High-Level Input Voltage | VIH | 1.5 | V | VCC = 2.0 V; TA = 25°C | 5 | ||
| Minimum High-Level Input Voltage | VIH | 2.1 | V | VCC = 3.0 V; TA = 25°C | 5 | ||
| Minimum High-Level Input Voltage | VIH | 3.15 | V | VCC = 4.5 V; TA = 25°C | 5 | ||
| Minimum High-Level Input Voltage | VIH | 3.85 | V | VCC = 5.5 V; TA = 25°C | 5 | ||
| Maximum Low-Level Input Voltage | VIL | 0.5 | V | VCC = 2.0 V; TA = 25°C | 5 | ||
| Maximum Low-Level Input Voltage | VIL | 0.9 | V | VCC = 3.0 V; TA = 25°C | 5 | ||
| Maximum Low-Level Input Voltage | VIL | 1.35 | V | VCC = 4.5 V; TA = 25°C | 5 | ||
| Maximum Low-Level Input Voltage | VIL | 1.65 | V | VCC = 5.5 V; TA = 25°C | 5 | ||
| Minimum High-Level Output Voltage | VOH | 1.9 | V | VIN = VIH or VIL; IOH = −50 μA; VCC = 2.0 V; TA = 25°C | 5 | ||
| Minimum High-Level Output Voltage | VOH | 2.9 | V | VIN = VIH or VIL; IOH = −50 μA; VCC = 3.0 V; TA = 25°C | 5 | ||
| Minimum High-Level Output Voltage | VOH | 4.4 | V | VIN = VIH or VIL; IOH = −50 μA; VCC = 4.5 V; TA = 25°C | 5 | ||
| Minimum High-Level Output Voltage | VOH | 2.58 | V | VIN = VIH or VIL; IOH = −4 mA; VCC = 3.0 V; TA = 25°C | 5 | ||
| Minimum High-Level Output Voltage | VOH | 2.34 | V | VIN = VIH or VIL; IOH = −4 mA; VCC = 3.0 V; TA = 125°C (≤125°C column) | 5 | ||
| Minimum High-Level Output Voltage | VOH | 3.94 | V | VIN = VIH or VIL; IOH = −8 mA; VCC = 4.5 V; TA = 25°C | 5 | ||
| Minimum High-Level Output Voltage | VOH | 3.66 | V | VIN = VIH or VIL; IOH = −8 mA; VCC = 4.5 V; TA = 125°C (≤125°C column) | 5 | ||
| Maximum Low-Level Output Voltage | VOL | 0.1 | V | VIN = VIH or VIL; IOL = 50 μA; VCC = 2.0 V; TA = 25°C | 5 | ||
| Maximum Low-Level Output Voltage | VOL | 0.36 | V | VIN = VIH or VIL; IOL = 4 mA; VCC = 3.0 V; TA = 25°C | 5 | ||
| Maximum Low-Level Output Voltage | VOL | 0.52 | V | VIN = VIH or VIL; IOL = 4 mA; VCC = 3.0 V; TA = 125°C (≤125°C column) | 5 | ||
| Maximum Input Capacitance | CIN | 4 | 10 | pF | TA = 25°C | 5 | |
| Maximum Input Capacitance | CIN | 10 | pF | TA = 125°C (≤125°C column) | 5 |
CAD (KiCad official)
- Symbol:
MC74VHC138DTR2G - Footprint:
Package_SO:TSSOP-16_4.4x5mm_P0.65mm - 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files:
mc74vhc138dtr2g-etched.step/mc74vhc138dtr2g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mc74vhc138dtr2g.step/mc74vhc138dtr2g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (8 pp, sha256
20c8764ebb22ca67, retrieved 2026-10-18, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).