component
CD74HCT243M
Public Made by Adomby adom
Texas Instruments Buffers, Drivers, Receivers, Transceivers, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
← Commit history
README.mdadded+51@@ -0,0 +1,51 @@+# CD74HCT243M++**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SOIC-14++CD74HCT243M from Texas Instruments, in a SOIC-14. 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 | OEB | input | Output-enable B control input; HIGH (with OEA HIGH) enables B-to-A data flow (An = output, Bn = input); LOW (with OEA LOW) enables A-to-B data flow; mixed OEA/OEB states force all I/O to high-Z; VIL = 0.8 V max, VIH = 2 V min (HCT type). |+| 2 | NC | unconnected | No internal connection. |+| 3 | A0 | bidirectional | Port A channel 0 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB. |+| 4 | A1 | bidirectional | Port A channel 1 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB. |+| 5 | A2 | bidirectional | Port A channel 2 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB. |+| 6 | A3 | bidirectional | Port A channel 3 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB. |+| 7 | GND | power_in | Ground reference; continuous current through GND pin must not exceed ±70 mA. |+| 8 | B3 | bidirectional | Port B channel 3 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB. |+| 9 | B2 | bidirectional | Port B channel 2 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB. |+| 10 | B1 | bidirectional | Port B channel 1 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB. |+| 11 | B0 | bidirectional | Port B channel 0 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB. |+| 12 | NC | unconnected | No internal connection. |+| 13 | OEA | input | Output-enable A control input; HIGH (with OEB HIGH) enables B-to-A data flow (An = output, Bn = input); LOW (with OEB LOW) enables A-to-B data flow; mixed OEA/OEB states force all I/O to high-Z; VIL = 0.8 V max, VIH = 2 V min (HCT type). |+| 14 | VCC | power_in | Positive supply voltage; HCT type: 4.5 V to 5.5 V recommended operating range; continuous current through VCC must not exceed ±70 mA. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-14 |+| Category | Logic |+| Pins | 14 |++## CAD (KiCad official)++- Symbol: `CD74HCT243M`+- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`+- 3D model: SOIC-14 (KiCad packages3D, STEP)+- 3D model files: `cd74hct243m-etched.step` / `cd74hct243m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd74hct243m.step` / `cd74hct243m.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/cd74hct243) (24 pp, sha256 `40fb03b77b5d31c8`, retrieved 2026-09-26, 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-sonnet-4-6` (text+vision), consensus `claude-opus-4-7` (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/cd74hct243m-datasheet.pdf)
page.jsonadded+194@@ -0,0 +1,194 @@+{+ "slug": "cd74hct243m",+ "version": "0.1.0",+ "type": "component",+ "description": "Texas Instruments Buffers, Drivers, Receivers, Transceivers, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",+ "tags": [+ "component",+ "logic",+ "cd74hct243m",+ "factory-2.0.0",+ "extractor-text"+ ],+ "dependencies": {},+ "hero": {+ "type": "image",+ "path": "docs/hero.png"+ },+ "files": [+ "page.json",+ "README.md",+ "cd74hct243m.kicad_sym",+ "cd74hct243m.kicad_mod",+ "cd74hct243m.glb",+ "cd74hct243m.step",+ "cd74hct243m.lbr",+ "docs/hero.png",+ "docs/cd74hct243m-datasheet.pdf",+ "viewers/symbol.html",+ "viewers/footprint.html"+ ],+ "component": {+ "mpn": "CD74HCT243M",+ "manufacturer": "Texas Instruments",+ "package": "SOIC-14",+ "pin_count": 14,+ "category": "Logic",+ "subcategory": "Buffers, Drivers, Receivers, Transceivers",+ "datasheet": "https://www.ti.com/cn/lit/gpn/cd74hct243",+ "parts": {+ "symbol": "cd74hct243m.kicad_sym",+ "footprint": "cd74hct243m.kicad_mod",+ "model_3d": "cd74hct243m-etched.glb",+ "model_3d_plain": "cd74hct243m.glb",+ "model_3d_step": "cd74hct243m-etched.step",+ "model_3d_step_plain": "cd74hct243m.step",+ "lbr": "cd74hct243m.lbr"+ },+ "distributor_links": {+ "lcsc": "C1548352",+ "digikey": "296-26025-5-ND",+ "mouser": "595-CD74HCT243M"+ },+ "distributor_check": {+ "checked_at": "2026-09-26T20:50:41Z",+ "source": "Component Ocean /api/assign-pns",+ "digikey": {+ "pn": "296-26025-5-ND",+ "status": "found",+ "lifecycle": "Active"+ },+ "mouser": {+ "pn": "595-CD74HCT243M",+ "status": "found"+ }+ },+ "pins": [+ {+ "number": "1",+ "name": "OEB",+ "type": "input",+ "description": "Output-enable B control input; HIGH (with OEA HIGH) enables B-to-A data flow (An = output, Bn = input); LOW (with OEA LOW) enables A-to-B data flow; mixed OEA/OEB states force all I/O to high-Z; VIL = 0.8 V max, VIH = 2 V min (HCT type)."+ },+ {+ "number": "2",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "3",+ "name": "A0",+ "type": "bidirectional",+ "description": "Port A channel 0 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB."+ },+ {+ "number": "4",+ "name": "A1",+ "type": "bidirectional",+ "description": "Port A channel 1 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB."+ },+ {+ "number": "5",+ "name": "A2",+ "type": "bidirectional",+ "description": "Port A channel 2 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB."+ },+ {+ "number": "6",+ "name": "A3",+ "type": "bidirectional",+ "description": "Port A channel 3 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in B-to-A mode; acts as input in A-to-B mode; high-Z when OEA ≠ OEB."+ },+ {+ "number": "7",+ "name": "GND",+ "type": "power_in",+ "description": "Ground reference; continuous current through GND pin must not exceed ±70 mA."+ },+ {+ "number": "8",+ "name": "B3",+ "type": "bidirectional",+ "description": "Port B channel 3 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB."+ },+ {+ "number": "9",+ "name": "B2",+ "type": "bidirectional",+ "description": "Port B channel 2 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB."+ },+ {+ "number": "10",+ "name": "B1",+ "type": "bidirectional",+ "description": "Port B channel 1 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB."+ },+ {+ "number": "11",+ "name": "B0",+ "type": "bidirectional",+ "description": "Port B channel 0 bidirectional tri-state I/O; drives as output (VOH ≥ 3.84 V, VOL ≤ 0.33 V at IOH = −6 mA / IOL = 6 mA, VCC = 4.5 V) in A-to-B mode; acts as input in B-to-A mode; high-Z when OEA ≠ OEB."+ },+ {+ "number": "12",+ "name": "NC",+ "type": "unconnected",+ "description": "No internal connection."+ },+ {+ "number": "13",+ "name": "OEA",+ "type": "input",+ "description": "Output-enable A control input; HIGH (with OEB HIGH) enables B-to-A data flow (An = output, Bn = input); LOW (with OEB LOW) enables A-to-B data flow; mixed OEA/OEB states force all I/O to high-Z; VIL = 0.8 V max, VIH = 2 V min (HCT type)."+ },+ {+ "number": "14",+ "name": "VCC",+ "type": "power_in",+ "description": "Positive supply voltage; HCT type: 4.5 V to 5.5 V recommended operating range; continuous current through VCC must not exceed ±70 mA."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.2",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.2",+ "primary_model": "claude-sonnet-4-6",+ "primary_mode": "text+vision",+ "consensus_model": "claude-opus-4-7",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [+ "vision extraction: provenance cannot be text-verified; needs consensus"+ ],+ "pages_sent": 24,+ "cost_usd": 0.6154,+ "at": "2026-09-26T20:50:24"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/cd74hct243",+ "pages": 24,+ "sha256": "40fb03b77b5d31c8",+ "source_tier": "lcsc"+ },+ "cad": "KiCad official (CC-BY-SA 4.0)",+ "pins": {+ "total": 14,+ "described": 14,+ "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]"+ }+}