component
74HC4538PW
Public Made by Adomby adom
Nexperia Monostable Multivibrators, TSSOP-16. Pinout extracted from 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
markdown74HC4538PW
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.
74HC4538PW74HC4538PWD
CAD (KiCad official)
- Symbol:
74HC4538PW - Footprint:
Package_SO:TSSOP-16_4.4x5mm_P0.65mm - 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files:
74hc4538pw-etched.step/74hc4538pw-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74hc4538pw.step/74hc4538pw.glbare the bare package body.
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).