component

74HC4538PW

Public Unreviewed

by Ray

Nexperia Monostable Multivibrators, TSSOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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74HC4538PW

Nexperia · Monostable Multivibrators · TSSOP-16

74HC4538PW from Nexperia, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 1CEXT passive External timing capacitor connection for multivibrator 1 (always connected to ground side of CEXT).
2 1REXT/CEXT passive External timing resistor/capacitor connection for multivibrator 1. Pulse width T = 0.7 x REXT x CEXT.
3 1CD input Direct reset input for multivibrator 1 (active LOW). A LOW terminates the output pulse immediately.
4 1B input Trigger input B for multivibrator 1 (LOW-to-HIGH edge triggered). Schmitt-trigger input.
5 1A input Trigger input A for multivibrator 1 (HIGH-to-LOW edge triggered, active LOW). Schmitt-trigger input.
6 1Q output True output of multivibrator 1. Emits a HIGH pulse of width 0.7 x REXT x CEXT on trigger.
7 1Q_bar output Complementary (inverted, active LOW) output of multivibrator 1.
8 GND power_in Ground reference (0 V).
9 2Q_bar output Complementary (inverted, active LOW) output of multivibrator 2.
10 2Q output True output of multivibrator 2. Emits a HIGH pulse of width 0.7 x REXT x CEXT on trigger.
11 2A input Trigger input A for multivibrator 2 (HIGH-to-LOW edge triggered, active LOW). Schmitt-trigger input.
12 2B input Trigger input B for multivibrator 2 (LOW-to-HIGH edge triggered). Schmitt-trigger input.
13 2CD input Direct reset input for multivibrator 2 (active LOW). A LOW terminates the output pulse immediately.
14 2REXT/CEXT passive External timing resistor/capacitor connection for multivibrator 2. Pulse width T = 0.7 x REXT x CEXT.
15 2CEXT passive External timing capacitor connection for multivibrator 2 (always connected to ground side of CEXT).
16 VCC power_in Positive supply voltage, 2.0 V to 6.0 V (absolute max 7.0 V).

Key specifications

Parameter Value
Manufacturer Nexperia
Package TSSOP-16
Category Logic
Pins 16

Ordering variants

Same part, different packaging or reel option.

  • 74HC4538PW
  • 74HC4538PWD

CAD (KiCad official)

  • Symbol: 74HC4538PW
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Nexperia datasheet (17 pp, sha256 c779fe6317e1e04e, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF