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74VHC138FT

Public Made by Adom

by adom

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

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74VHC138FT

TOSHIBA · Signal Switches, Multiplexers, Decoders · TSSOP-16

74VHC138FT from TOSHIBA, 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 A input Binary select input A; inputs accept 0 to 5.5 V regardless of supply voltage.
2 B input Binary select input B; inputs accept 0 to 5.5 V regardless of supply voltage.
3 C input Binary select input C; inputs accept 0 to 5.5 V regardless of supply voltage.
4 G2A input Active-low enable input; when high, decoding is inhibited and all outputs go high.
5 G2B input Active-low enable input; when high, decoding is inhibited and all outputs go high.
6 G1 input Active-high enable input; when held low, decoding is inhibited and all outputs go high.
7 Y7 output Active-low decoded output 7, goes low when selected while the device is enabled.
8 GND power_in Ground (0 V) supply pin.
9 Y6 output Active-low decoded output 6, goes low when selected while the device is enabled.
10 Y5 output Active-low decoded output 5, goes low when selected while the device is enabled.
11 Y4 output Active-low decoded output 4, goes low when selected while the device is enabled.
12 Y3 output Active-low decoded output 3, goes low when selected while the device is enabled.
13 Y2 output Active-low decoded output 2, goes low when selected while the device is enabled.
14 Y1 output Active-low decoded output 1, goes low when selected while the device is enabled.
15 Y0 output Active-low decoded output 0, goes low when selected while the device is enabled.
16 VCC power_in Positive supply pin; operating range 2.0 V to 5.5 V.

Key specifications

Parameter Value
Manufacturer TOSHIBA
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
Supply voltage VCC -0.5 7 V 4
Input voltage VIN -0.5 7 V 4
Input diode current IIK -20 mA 4
Output diode current IOK -20 20 mA 4
Output current IOUT -25 25 mA 4
VCC/ground current ICC -75 75 mA 4
Power dissipation PD 180 mW Ta = -40 to 85 °C; derate -3.25 mW/°C from 85 to 125 °C to 50 mW (Note 1) 4
Storage temperature Tstg -65 150 °C 4
Supply voltage VCC 2 5.5 V 4
Input voltage VIN 0 5.5 V 4
Operating temperature Topr -40 125 °C 4
Input rise and fall times dt/dv 0 100 ns/V VCC = 3.3 ± 0.3 V 4
Input rise and fall times dt/dv 0 20 ns/V VCC = 5 ± 0.5 V 4
High-level input voltage VIH 1.5 V Ta = 25 °C; VCC = 2.0 V 5
Low-level input voltage VIL 0.5 V Ta = 25 °C; VCC = 2.0 V 5
High-level output voltage VOH 1.9 V Ta = 25 °C; VCC = 2.0 V; IOH = -50 µA 5
High-level output voltage VOH 2.9 V Ta = 25 °C; VCC = 3.0 V; IOH = -50 µA 5
High-level output voltage VOH 4.4 V Ta = 25 °C; VCC = 4.5 V; IOH = -50 µA 5
High-level output voltage VOH 2.58 V Ta = 25 °C; VCC = 3.0 V; IOH = -4 mA 5
High-level output voltage VOH 3.94 V Ta = 25 °C; VCC = 4.5 V; IOH = -8 mA 5
Low-level output voltage VOL 0.1 V Ta = 25 °C; VCC = 2.0 V; IOL = 50 µA 5
Low-level output voltage VOL 0.36 V Ta = 25 °C; VCC = 3.0 V; IOL = 4 mA 5
Input leakage current IIN -0.1 0.1 µA Ta = 25 °C; VIN = 5.5 V or GND; VCC = 0 to 5.5 V 5
Quiescent supply current ICC 4 µA Ta = 25 °C; VIN = VCC or GND; VCC = 5.5 V 5
High-level output voltage VOH 2.48 V Ta = -40 to 85 °C; VCC = 3.0 V; IOH = -4 mA 5
High-level output voltage VOH 3.8 V Ta = -40 to 85 °C; VCC = 4.5 V; IOH = -8 mA 5
Low-level output voltage VOL 0.44 V Ta = -40 to 85 °C; VCC = 3.0 V; IOL = 4 mA 5
Input leakage current IIN -1 1 µA Ta = -40 to 85 °C; VIN = 5.5 V or GND; VCC = 0 to 5.5 V 5
Quiescent supply current ICC 40 µA Ta = -40 to 85 °C; VIN = VCC or GND; VCC = 5.5 V 5
High-level input voltage VIH 1.5 V Ta = -40 to 125 °C; VCC = 2.0 V 6
Low-level input voltage VIL 0.5 V Ta = -40 to 125 °C; VCC = 2.0 V 6
High-level output voltage VOH 1.9 V Ta = -40 to 125 °C; VCC = 2.0 V; IOH = -50 µA 6
High-level output voltage VOH 2.9 V Ta = -40 to 125 °C; VCC = 3.0 V; IOH = -50 µA 6
High-level output voltage VOH 4.4 V Ta = -40 to 125 °C; VCC = 4.5 V; IOH = -50 µA 6
High-level output voltage VOH 2.4 V Ta = -40 to 125 °C; VCC = 3.0 V; IOH = -4 mA 6
High-level output voltage VOH 3.7 V Ta = -40 to 125 °C; VCC = 4.5 V; IOH = -8 mA 6
Low-level output voltage VOL 0.1 V Ta = -40 to 125 °C; VCC = 2.0 V; IOL = 50 µA 6
Low-level output voltage VOL 0.55 V Ta = -40 to 125 °C; VCC = 3.0 V; IOL = 4 mA 6
Input leakage current IIN -2 2 µA Ta = -40 to 125 °C; VIN = 5.5 V or GND; VCC = 0 to 5.5 V 6
Quiescent supply current ICC 80 µA Ta = -40 to 125 °C; VIN = VCC or GND; VCC = 5.5 V 6
Propagation delay time (A, B, C - Y) tPLH,tPHL 1 11 ns Ta = -40 to 125 °C; VCC = 5.0 ± 0.5 V; CL = 15 pF; tr = tf = 3 ns 7
Propagation delay time (G1 - Y) tPLH,tPHL 1 11 ns Ta = -40 to 125 °C; VCC = 5.0 ± 0.5 V; CL = 15 pF; tr = tf = 3 ns 7
Propagation delay time (G2 - Y) tPLH,tPHL 1 11 ns Ta = -40 to 125 °C; VCC = 5.0 ± 0.5 V; CL = 15 pF; tr = tf = 3 ns 7
Input capacitance CIN 10 pF Ta = -40 to 125 °C; tr = tf = 3 ns 7

CAD (KiCad official)

  • Symbol: 74VHC138FT
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)
  • 3D model files: 74vhc138ft-etched.step / 74vhc138ft-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 74vhc138ft.step / 74vhc138ft.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: TOSHIBA datasheet (9 pp, sha256 6992467e14e2a559, retrieved 2026-10-19, 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