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TC74HC138APF
Public Made by Adomby adom
TOSHIBA Signal Switches, Multiplexers, Decoders, DIP-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
markdownTC74HC138APF
TOSHIBA · Signal Switches, Multiplexers, Decoders · DIP-16
TC74HC138APF from TOSHIBA, in a DIP-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 | A | input | Binary select input A (LSB) that together with B and C selects which one of outputs Y0-Y7 goes low. |
| 2 | B | input | Binary select input B that together with A and C selects which one of outputs Y0-Y7 goes low. |
| 3 | C | input | Binary select input C (MSB) that together with A and B selects which one of outputs Y0-Y7 goes low. |
| 4 | G2A | input | Active-low enable input; when held high the decoding function is inhibited and all outputs go high. |
| 5 | G2B | input | Active-low enable input; when held high the decoding function is inhibited and all outputs go high. |
| 6 | G1 | input | Active-high enable input; when held low the decoding function is inhibited and all outputs go high. |
| 7 | Y7 | output | Active-low decoded output 7, goes low when select inputs are H,H,H and the device is enabled. |
| 8 | GND | power_in | Ground pin (0 V). |
| 9 | Y6 | output | Active-low decoded output 6, goes low when select inputs C,B,A are H,H,L and the device is enabled. |
| 10 | Y5 | output | Active-low decoded output 5, goes low when select inputs C,B,A are H,L,H and the device is enabled. |
| 11 | Y4 | output | Active-low decoded output 4, goes low when select inputs C,B,A are H,L,L and the device is enabled. |
| 12 | Y3 | output | Active-low decoded output 3, goes low when select inputs C,B,A are L,H,H and the device is enabled. |
| 13 | Y2 | output | Active-low decoded output 2, goes low when select inputs C,B,A are L,H,L and the device is enabled. |
| 14 | Y1 | output | Active-low decoded output 1, goes low when select inputs C,B,A are L,L,H and the device is enabled. |
| 15 | Y0 | output | Active-low decoded output 0, goes low when select inputs C,B,A are L,L,L and the device is enabled. |
| 16 | VCC | power_in | Positive supply voltage, operating range 2 to 6 V (absolute maximum -0.5 to 7 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TOSHIBA |
| Package | DIP-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 |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | 2 | 6 | V | 3 | ||
| Input voltage | VIN | 0 | V | 3 | |||
| Operating temperature | Topr | -40 | 85 | °C | 3 | ||
| Input rise and fall time | tr, tf | 0 | 1000 | ns | VCC = 2.0 V | 3 | |
| Input rise and fall time | tr, tf | 0 | 500 | ns | VCC = 4.5 V | 3 | |
| Input rise and fall time | tr, tf | 0 | 400 | ns | VCC = 6.0 V | 3 | |
| Supply voltage range | VCC | -0.5 | 7 | V | 3 | ||
| DC input voltage | VIN | -0.5 | V | 3 | |||
| DC output voltage | VOUT | -0.5 | V | 3 | |||
| Input diode current | IIK | -20 | 20 | mA | 3 | ||
| Output diode current | IOK | -20 | 20 | mA | 3 | ||
| DC output current | IOUT | -25 | 25 | mA | 3 | ||
| DC VCC/ground current | ICC | -50 | 50 | mA | 3 | ||
| Power dissipation | PD | 500 | mW | DIP package; 500 mW for Ta = −40 to 65°C (Note 2) | 3 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| High-level input voltage | VIH | 1.5 | V | VCC = 2.0 V; Ta = −40 to 85°C | 4 | ||
| High-level input voltage | VIH | 3.15 | V | VCC = 4.5 V; Ta = −40 to 85°C | 4 | ||
| High-level input voltage | VIH | 4.2 | V | VCC = 6.0 V; Ta = −40 to 85°C | 4 | ||
| Low-level input voltage | VIL | 0.5 | V | VCC = 2.0 V; Ta = −40 to 85°C | 4 | ||
| Low-level input voltage | VIL | 1.35 | V | VCC = 4.5 V; Ta = −40 to 85°C | 4 | ||
| Low-level input voltage | VIL | 1.8 | V | VCC = 6.0 V; Ta = −40 to 85°C | 4 | ||
| High-level output voltage | VOH | 1.9 | V | VIN = VIH or VIL; IOH = −20 μA; VCC = 2.0 V; Ta = −40 to 85°C | 4 | ||
| High-level output voltage | VOH | 4.4 | V | VIN = VIH or VIL; IOH = −20 μA; VCC = 4.5 V; Ta = −40 to 85°C | 4 | ||
| High-level output voltage | VOH | 5.9 | V | VIN = VIH or VIL; IOH = −20 μA; VCC = 6.0 V; Ta = −40 to 85°C | 4 | ||
| High-level output voltage | VOH | 4.18 | V | VIN = VIH or VIL; IOH = −4 mA; VCC = 4.5 V; Ta = 25°C | 4 | ||
| High-level output voltage | VOH | 5.68 | V | VIN = VIH or VIL; IOH = −5.2 mA; VCC = 6.0 V; Ta = 25°C | 4 | ||
| High-level output voltage | VOH | 4.13 | V | VIN = VIH or VIL; IOH = −4 mA; VCC = 4.5 V; Ta = −40 to 85°C | 4 | ||
| High-level output voltage | VOH | 5.63 | V | VIN = VIH or VIL; IOH = −5.2 mA; VCC = 6.0 V; Ta = −40 to 85°C | 4 | ||
| Low-level output voltage | VOL | 0.1 | V | VIN = VIH or VIL; IOL = 20 μA; VCC = 2.0 V; Ta = −40 to 85°C | 4 | ||
| Low-level output voltage | VOL | 0.26 | V | VIN = VIH or VIL; IOL = 4 mA; VCC = 4.5 V; Ta = 25°C | 4 | ||
| Low-level output voltage | VOL | 0.33 | V | VIN = VIH or VIL; IOL = 4 mA; VCC = 4.5 V; Ta = −40 to 85°C | 4 | ||
| Input leakage current | IIN | -0.1 | 0.1 | μA | VIN = VCC or GND; VCC = 6.0 V; Ta = 25°C | 4 | |
| Input leakage current | IIN | -1 | 1 | μA | VIN = VCC or GND; VCC = 6.0 V; Ta = −40 to 85°C | 4 | |
| Quiescent supply current | ICC | 4 | μA | VIN = VCC or GND; VCC = 6.0 V; Ta = 25°C | 4 | ||
| Quiescent supply current | ICC | 40 | μA | VIN = VCC or GND; VCC = 6.0 V; Ta = −40 to 85°C | 4 | ||
| Propagation delay time (A, B, C - Y) | tpLH, tpHL | 16 | 26 | ns | CL = 15 pF, VCC = 5 V, Ta = 25°C, tr = tf = 6 ns | 4 | |
| Propagation delay time (G, G - Y) | tpLH, tpHL | 15 | 25 | ns | CL = 15 pF, VCC = 5 V, Ta = 25°C, tr = tf = 6 ns | 4 | |
| Input capacitance | CIN | 5 | 10 | pF | 5 | ||
| Output transition time | tTLH, tTHL | 75 | ns | CL = 50 pF, VCC = 2.0 V, tr = tf = 6 ns, Ta = 25°C | 5 | ||
| Output transition time | tTLH, tTHL | 15 | ns | CL = 50 pF, VCC = 4.5 V, tr = tf = 6 ns, Ta = 25°C | 5 | ||
| Output transition time | tTLH, tTHL | 13 | ns | CL = 50 pF, VCC = 6.0 V, tr = tf = 6 ns, Ta = 25°C | 5 | ||
| Output transition time | tTLH, tTHL | 95 | ns | CL = 50 pF, VCC = 2.0 V, tr = tf = 6 ns, Ta = −40 to 85°C | 5 | ||
| Output transition time | tTLH, tTHL | 19 | ns | CL = 50 pF, VCC = 4.5 V, tr = tf = 6 ns, Ta = −40 to 85°C | 5 | ||
| Output transition time | tTLH, tTHL | 16 | ns | CL = 50 pF, VCC = 6.0 V, tr = tf = 6 ns, Ta = −40 to 85°C | 5 | ||
| Propagation delay time (A, B, C - Y) | tpLH, tpHL | 150 | ns | CL = 50 pF, VCC = 2.0 V, tr = tf = 6 ns, Ta = 25°C | 5 | ||
| Propagation delay time (A, B, C - Y) | tpLH, tpHL | 30 | ns | CL = 50 pF, VCC = 4.5 V, tr = tf = 6 ns, Ta = 25°C | 5 | ||
| Propagation delay time (A, B, C - Y) | tpLH, tpHL | 26 | ns | CL = 50 pF, VCC = 6.0 V, tr = tf = 6 ns, Ta = 25°C | 5 | ||
| Propagation delay time (A, B, C - Y) | tpLH, tpHL | 190 | ns | CL = 50 pF, VCC = 2.0 V, tr = tf = 6 ns, Ta = −40 to 85°C | 5 | ||
| Propagation delay time (A, B, C - Y) | tpLH, tpHL | 38 | ns | CL = 50 pF, VCC = 4.5 V, tr = tf = 6 ns, Ta = −40 to 85°C | 5 | ||
| Propagation delay time (A, B, C - Y) | tpLH, tpHL | 32 | ns | CL = 50 pF, VCC = 6.0 V, tr = tf = 6 ns, Ta = −40 to 85°C | 5 | ||
| Propagation delay time (G, G - Y) | tpLH, tpHL | 145 | ns | CL = 50 pF, VCC = 2.0 V, tr = tf = 6 ns, Ta = 25°C | 5 | ||
| Propagation delay time (G, G - Y) | tpLH, tpHL | 29 | ns | CL = 50 pF, VCC = 4.5 V, tr = tf = 6 ns, Ta = 25°C | 5 | ||
| Propagation delay time (G, G - Y) | tpLH, tpHL | 25 | ns | CL = 50 pF, VCC = 6.0 V, tr = tf = 6 ns, Ta = 25°C | 5 | ||
| Propagation delay time (G, G - Y) | tpLH, tpHL | 180 | ns | CL = 50 pF, VCC = 2.0 V, tr = tf = 6 ns, Ta = −40 to 85°C | 5 | ||
| Propagation delay time (G, G - Y) | tpLH, tpHL | 36 | ns | CL = 50 pF, VCC = 4.5 V, tr = tf = 6 ns, Ta = −40 to 85°C | 5 | ||
| Propagation delay time (G, G - Y) | tpLH, tpHL | 31 | ns | CL = 50 pF, VCC = 6.0 V, tr = tf = 6 ns, Ta = −40 to 85°C | 5 |
CAD (KiCad official)
- Symbol:
TC74HC138APF - Footprint:
Package_DIP:DIP-16_W7.62mm - 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files:
tc74hc138apf-etched.step/tc74hc138apf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tc74hc138apf.step/tc74hc138apf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TOSHIBA datasheet (9 pp, sha256
00a3ed21625d3d0e, retrieved 2026-10-16, tier: lcsc) - 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).