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TC74HC138APF

Public Made by Adom

by adom

TOSHIBA Signal Switches, Multiplexers, Decoders, DIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TC74HC138APF

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tc74hc138apf.step / tc74hc138apf.glb are 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, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF