74HC4538PW

@@ -0,0 +1,58 @@+# 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](https://assets.nexperia.com/documents/data-sheet/74HC4538PW.pdf) (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](docs/74hc4538pw-datasheet.pdf)

@@ -0,0 +1,34 @@+{+  "slug": "74hc4538pw",+  "version": "0.1.0",+  "type": "component",+  "description": "Nexperia Monostable Multivibrators, TSSOP-16. Datasheet-verified pinout, KiCad symbol/footprint/3D.",+  "tags": [+    "component",+    "logic",+    "74hc4538pw"+  ],+  "dependencies": {},+  "hero": {+    "type": "image",+    "path": "docs/hero.png"+  },+  "files": [+    "page.json",+    "README.md",+    "74hc4538pw.kicad_sym",+    "74hc4538pw.kicad_mod",+    "74hc4538pw.glb",+    "74hc4538pw.step",+    "74hc4538pw.lbr",+    "docs/hero.png",+    "docs/74hc4538pw-datasheet.pdf",+    "viewers/symbol.html",+    "viewers/footprint.html"+  ],+  "visibility": "public",+  "author": {+    "name": "Ray",+    "email": "[email protected]"+  }+}\ No newline at end of file