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74HCT238D

Public Made by Adom

by adom

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

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74HCT238D

Nexperia · Signal Switches, Multiplexers, Decoders · SO-16

74HCT238D from Nexperia, in a SO-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 (least significant binary weight) selects which mutually exclusive output Y0 to Y7 is active HIGH.
2 A1 input Address input A1 (middle binary weight) selects which mutually exclusive output Y0 to Y7 is active HIGH.
3 A2 input Address input A2 (most significant binary weight) selects which mutually exclusive output Y0 to Y7 is active HIGH.
4 E1 input Active LOW enable input; all outputs stay LOW unless E1 and E2 are LOW and E3 is HIGH.
5 E2 input Active LOW enable input; all outputs stay LOW unless E1 and E2 are LOW and E3 is HIGH.
6 E3 input Active HIGH enable input; all outputs stay LOW unless E1 and E2 are LOW and E3 is HIGH.
7 Y7 output Active HIGH mutually exclusive decoder output, LOW unless the device is enabled and selected by A0 to A2.
8 GND power_in Ground (0 V) reference for all voltages; this is the device ground pin.
9 Y6 output Active HIGH mutually exclusive decoder output, LOW unless the device is enabled and selected by A0 to A2.
10 Y5 output Active HIGH mutually exclusive decoder output, LOW unless the device is enabled and selected by A0 to A2.
11 Y4 output Active HIGH mutually exclusive decoder output, LOW unless the device is enabled and selected by A0 to A2.
12 Y3 output Active HIGH mutually exclusive decoder output, LOW unless the device is enabled and selected by A0 to A2.
13 Y2 output Active HIGH mutually exclusive decoder output, LOW unless the device is enabled and selected by A0 to A2.
14 Y1 output Active HIGH mutually exclusive decoder output, LOW unless the device is enabled and selected by A0 to A2.
15 Y0 output Active HIGH mutually exclusive decoder output, LOW unless the device is enabled and selected by A0 to A2.
16 VCC power_in Supply voltage; 74HCT238 recommended operating range is 4.5 V to 5.5 V and absolute maximum is 7 V.

Key specifications

Parameter Value
Manufacturer Nexperia
Package SO-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 Voltages referenced to GND 4
Input clamping current IIK -20 20 mA VI < -0.5 V or VI > VCC + 0.5 V 4
Output clamping current IOK -20 20 mA VO < -0.5 V or VO > VCC + 0.5 V 4
Output current IO -25 25 mA -0.5 V < VO < VCC + 0.5 V 4
Supply current ICC 50 mA 4
Ground current IGND -50 mA 4
Storage temperature Tstg -65 150 °C 4
Total power dissipation Ptot 500 mW SOT109-1 (SO16) derates linearly with 12.4 mW/K above 110 °C 4
Supply voltage VCC 4.5 5 5.5 V 74HCT238 5
Input voltage VI 0 V max = VCC 5
Output voltage VO 0 V max = VCC 5
Ambient temperature Tamb -40 125 °C 5
Input transition rise and fall rate Δt/ΔV 1.67 139 ns/V VCC = 4.5 V 5
HIGH-level input voltage VIH 2 1.6 V 74HCT238; VCC = 4.5 V to 5.5 V; min at -40 °C to +125 °C, typ at 25 °C 6
LOW-level input voltage VIL 1.2 0.8 V 74HCT238; VCC = 4.5 V to 5.5 V; max at -40 °C to +125 °C, typ at 25 °C 6
HIGH-level output voltage VOH 4.4 4.5 V 74HCT238; VI = VIH or VIL; VCC = 4.5 V; IO = -20 μA 6
HIGH-level output voltage VOH 3.7 4.32 V 74HCT238; VI = VIH or VIL; VCC = 4.5 V; IO = -4.0 mA 6
LOW-level output voltage VOL 0 0.1 V 74HCT238; VI = VIH or VIL; VCC = 4.5 V; IO = 20 μA 6
LOW-level output voltage VOL 0.16 0.4 V 74HCT238; VI = VIH or VIL; VCC = 4.5 V; IO = 4.0 mA 6
Input leakage current II -1 1 μA 74HCT238; VI = VCC or GND; VCC = 5.5 V 6
Supply current ICC 160 μA 74HCT238; VI = VCC or GND; VCC = 5.5 V; IO = 0 A 6
Additional supply current ΔICC 70 343 μA 74HCT238; An inputs; VI = VCC - 2.1 V; IO = 0 A; VCC = 4.5 V to 5.5 V 6
Additional supply current ΔICC 40 196 μA 74HCT238; E1, E2 inputs; VI = VCC - 2.1 V; IO = 0 A; VCC = 4.5 V to 5.5 V 6
Additional supply current ΔICC 145 711 μA 74HCT238; E3 input; VI = VCC - 2.1 V; IO = 0 A; VCC = 4.5 V to 5.5 V 6
Input capacitance CI 3.5 pF 74HCT238 6
Propagation delay An to Yn tpd 19 53 ns 74HCT238; VCC = 4.5 V; see Fig. 4 8
Propagation delay E3 to Yn tpd 20 56 ns 74HCT238; VCC = 4.5 V; see Fig. 4 8
Propagation delay En to Yn tpd 20 53 ns 74HCT238; VCC = 4.5 V; see Fig. 5 8
Transition time tt 7 22 ns 74HCT238; VCC = 4.5 V; see Fig. 4 and Fig. 5 8
Power dissipation capacitance CPD 76 pF 74HCT238; per package; VI = GND to VCC - 1.5 V 8

CAD (KiCad official)

  • Symbol: 74HCT238D
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SO-16 (KiCad packages3D, STEP)
  • 3D model files: 74hct238d-etched.step / 74hct238d-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 74hct238d.step / 74hct238d.glb are the bare package body.

Provenance

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

  • Datasheet: Nexperia datasheet (15 pp, sha256 f0f9b99563a06c78, retrieved 2026-10-27, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus off (skipped (clean text read)), 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