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CD74AC161M
Public Made by Adomby adom
Texas Instruments Counters, Dividers, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+53@@ -0,0 +1,53 @@+# CD74AC161M++**Texas Instruments** · Counters, Dividers · SOIC-16++CD74AC161M from Texas Instruments, in a SOIC-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 | CLR | input | Asynchronous clear input, active low; sets all Q outputs to low regardless of CLK, LOAD, or enable inputs. |+| 2 | CLK | input | Synchronous clock input, rising edge triggered. |+| 3 | A | input | Data input A for parallel preset operation; loaded to QA when LOAD is low. |+| 4 | B | input | Data input B for parallel preset operation; loaded to QB when LOAD is low. |+| 5 | C | input | Data input C for parallel preset operation; loaded to QC when LOAD is low. |+| 6 | D | input | Data input D for parallel preset operation; loaded to QD when LOAD is low. |+| 7 | ENP | input | Count enable input; ENP and ENT must both be high for counting; does not affect RCO output. |+| 8 | GND | power_in | Ground connection for power return and logic reference. |+| 9 | LOAD | input | Parallel load input, active low; disables counting and loads data A-D to Q outputs on next clock edge. |+| 10 | ENT | input | Count enable input; ENP and ENT must both be high for counting; feed-forward enables RCO at maximum count. |+| 11 | QD | output | Counter output D (most significant bit) for 4-bit binary count. |+| 12 | QC | output | Counter output C for 4-bit binary count. |+| 13 | QB | output | Counter output B for 4-bit binary count. |+| 14 | QA | output | Counter output A (least significant bit) for 4-bit binary count. |+| 15 | RCO | output | Ripple carry output; high pulse when counter reaches maximum (9 or 15) and ENT is high. |+| 16 | VCC | power_in | Power supply input voltage; operating range 1.5V to 5.5V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-16 |+| Category | Logic |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `CD74AC161M`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)+- 3D model files: `cd74ac161m-etched.step` / `cd74ac161m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd74ac161m.step` / `cd74ac161m.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/cd74ac161) (23 pp, sha256 `cc0df0be38defb4e`, retrieved 2026-09-27, tier: lcsc)+- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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](docs/cd74ac161m-datasheet.pdf)
page.jsonadded+205@@ -0,0 +1,205 @@+{+ "slug": "cd74ac161m",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Counters, Dividers, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "logic",+ "cd74ac161m",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "cd74ac161m.kicad_sym",+ "cd74ac161m.kicad_mod",+ "cd74ac161m.glb",+ "cd74ac161m.step",+ "cd74ac161m.lbr",+ "docs/hero.png",+ "docs/cd74ac161m-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "CD74AC161M",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-16",+ "pin_count": 16,+ "category": "Logic",+ "subcategory": "Counters, Dividers",+ "datasheet": "https://www.ti.com/cn/lit/gpn/cd74ac161",+ "parts": {+ "symbol": "cd74ac161m.kicad_sym",+ "footprint": "cd74ac161m.kicad_mod",+ "model_3d": "cd74ac161m-etched.glb",+ "model_3d_plain": "cd74ac161m.glb",+ "model_3d_step": "cd74ac161m-etched.step",+ "model_3d_step_plain": "cd74ac161m.step",+ "lbr": "cd74ac161m.lbr"+ },+ "distributor_links": {+ "lcsc": "C1523332",+ "digikey": "2156-CD74AC161M-ND",+ "mouser": "595-CD74AC161M"+ },+ "distributor_check": {+ "checked_at": "2026-09-27T02:25:55Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "2156-CD74AC161M-ND",+ "status": "found",+ "lifecycle": "Obsolete"+ },+ "mouser": {+ "pn": "595-CD74AC161M",+ "status": "found",+ "lifecycle": "Obsolete"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "CLR",+ "type": "input",+ "description": "Asynchronous clear input, active low; sets all Q outputs to low regardless of CLK, LOAD, or enable inputs."+ },+ {+ "number": "2",+ "name": "CLK",+ "type": "input",+ "description": "Synchronous clock input, rising edge triggered."+ },+ {+ "number": "3",+ "name": "A",+ "type": "input",+ "description": "Data input A for parallel preset operation; loaded to QA when LOAD is low."+ },+ {+ "number": "4",+ "name": "B",+ "type": "input",+ "description": "Data input B for parallel preset operation; loaded to QB when LOAD is low."+ },+ {+ "number": "5",+ "name": "C",+ "type": "input",+ "description": "Data input C for parallel preset operation; loaded to QC when LOAD is low."+ },+ {+ "number": "6",+ "name": "D",+ "type": "input",+ "description": "Data input D for parallel preset operation; loaded to QD when LOAD is low."+ },+ {+ "number": "7",+ "name": "ENP",+ "type": "input",+ "description": "Count enable input; ENP and ENT must both be high for counting; does not affect RCO output."+ },+ {+ "number": "8",+ "name": "GND",+ "type": "power_in",+ "description": "Ground connection for power return and logic reference."+ },+ {+ "number": "9",+ "name": "LOAD",+ "type": "input",+ "description": "Parallel load input, active low; disables counting and loads data A-D to Q outputs on next clock edge."+ },+ {+ "number": "10",+ "name": "ENT",+ "type": "input",+ "description": "Count enable input; ENP and ENT must both be high for counting; feed-forward enables RCO at maximum count."+ },+ {+ "number": "11",+ "name": "QD",+ "type": "output",+ "description": "Counter output D (most significant bit) for 4-bit binary count."+ },+ {+ "number": "12",+ "name": "QC",+ "type": "output",+ "description": "Counter output C for 4-bit binary count."+ },+ {+ "number": "13",+ "name": "QB",+ "type": "output",+ "description": "Counter output B for 4-bit binary count."+ },+ {+ "number": "14",+ "name": "QA",+ "type": "output",+ "description": "Counter output A (least significant bit) for 4-bit binary count."+ },+ {+ "number": "15",+ "name": "RCO",+ "type": "output",+ "description": "Ripple carry output; high pulse when counter reaches maximum (9 or 15) and ENT is high."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Power supply input voltage; operating range 1.5V to 5.5V."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-4-6",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 23,+ "cost_usd": 0.1907,+ "at": "2026-09-27T02:25:37"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/cd74ac161",+ "pages": 23,+ "sha256": "cc0df0be38defb4e",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 16,+ "described": 16,+ "cites_pages": true,+ "refuses_to_fabricate": true+ }+ },+ "viewers": {+ "symbol": "viewers/symbol.html",+ "footprint": "viewers/footprint.html"+ }+ },+ "visibility": "public",+ "org": "adom",+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ }+}