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SN74CBT3253DBQR
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Texas Instruments Signal Switches, Multiplexers, Decoders, SSOP-16-150mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+52@@ -0,0 +1,52 @@+# SN74CBT3253DBQR++**Texas Instruments** · Signal Switches, Multiplexers, Decoders · SSOP-16-150mil++SN74CBT3253DBQR from Texas Instruments, in a SSOP-16-150mil. 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 | 1OE | input | Active-low output enable for mux 1; high disconnects 1A from 1B1-1B4, TTL-compatible input (VIH min 2 V, VIL max 0.8 V). |+| 2 | S1 | input | Select input S1 shared by both multiplexers, chooses the B port with S0; TTL-compatible input (VIH min 2 V, VIL max 0.8 V). |+| 3 | 1B4 | bidirectional | Channel 4 port B of multiplexer 1, connected to 1A when S1 = H and S0 = H with 1OE low. |+| 4 | 1B3 | bidirectional | Channel 3 port B of multiplexer 1, connected to 1A when S1 = H and S0 = L with 1OE low. |+| 5 | 1B2 | bidirectional | Channel 2 port B of multiplexer 1, connected to 1A when S1 = L and S0 = H with 1OE low. |+| 6 | 1B1 | bidirectional | Channel 1 port B of multiplexer 1, connected to 1A when S1 = L and S0 = L with 1OE low. |+| 7 | 1A | bidirectional | Common port A of multiplexer 1, switched to one of 1B1-1B4 with on-state resistance of 5 Ω typ-max 7 Ω at 4.5 V, 64 mA. |+| 8 | GND | power_in | Ground; unused control inputs must be held at VCC or GND. |+| 9 | 2A | bidirectional | Common port A of multiplexer 2, switched to one of 2B1-2B4 with continuous channel current rated at 128 mA max. |+| 10 | 2B1 | bidirectional | Channel 1 port B of multiplexer 2, connected to 2A when S1 = L and S0 = L with 2OE low. |+| 11 | 2B2 | bidirectional | Channel 2 port B of multiplexer 2, connected to 2A when S1 = L and S0 = H with 2OE low. |+| 12 | 2B3 | bidirectional | Channel 3 port B of multiplexer 2, connected to 2A when S1 = H and S0 = L with 2OE low. |+| 13 | 2B4 | bidirectional | Channel 4 port B of multiplexer 2, connected to 2A when S1 = H and S0 = H with 2OE low. |+| 14 | S0 | input | Select input S0 shared by both multiplexers, chooses the B port with S1; TTL-compatible input (VIH min 2 V, VIL max 0.8 V). |+| 15 | 2OE | input | Active-low output enable for mux 2; high disconnects 2A from 2B1-2B4, TTL-compatible input (VIH min 2 V, VIL max 0.8 V). |+| 16 | VCC | power_in | Supply voltage, recommended 4 V to 5.5 V, absolute maximum -0.5 V to 7 V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SSOP-16-150mil |+| Category | Logic |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `SN74CBT3253DBQR`+- Footprint: `Package_SO:SSOP-16_5.3x6.2mm_P0.65mm`+- 3D model: SSOP-16-150mil (KiCad packages3D, STEP)+- 3D model files: `sn74cbt3253dbqr-etched.step` / `sn74cbt3253dbqr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74cbt3253dbqr.step` / `sn74cbt3253dbqr.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/sn74cbt3253) (23 pp, sha256 `e6985bcba97d587d`, retrieved 2026-10-05, tier: lcsc)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (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/sn74cbt3253dbqr-datasheet.pdf)
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high disconnects 1A from 1B1-1B4, TTL-compatible input (VIH min 2 V, VIL max 0.8 V)."+ },+ {+ "number": "2",+ "name": "S1",+ "type": "input",+ "description": "Select input S1 shared by both multiplexers, chooses the B port with S0; TTL-compatible input (VIH min 2 V, VIL max 0.8 V)."+ },+ {+ "number": "3",+ "name": "1B4",+ "type": "bidirectional",+ "description": "Channel 4 port B of multiplexer 1, connected to 1A when S1 = H and S0 = H with 1OE low."+ },+ {+ "number": "4",+ "name": "1B3",+ "type": "bidirectional",+ "description": "Channel 3 port B of multiplexer 1, connected to 1A when S1 = H and S0 = L with 1OE low."+ },+ {+ "number": "5",+ "name": "1B2",+ "type": "bidirectional",+ "description": "Channel 2 port B of multiplexer 1, connected to 1A when S1 = L and S0 = H with 1OE low."+ },+ {+ "number": "6",+ "name": "1B1",+ "type": "bidirectional",+ "description": "Channel 1 port B of multiplexer 1, connected to 1A when S1 = L and S0 = L with 1OE low."+ },+ {+ "number": "7",+ "name": "1A",+ "type": "bidirectional",+ "description": "Common port A of multiplexer 1, switched to one of 1B1-1B4 with on-state resistance of 5 Ω typ-max 7 Ω at 4.5 V, 64 mA."+ },+ {+ "number": "8",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; unused control inputs must be held at VCC or GND."+ },+ {+ "number": "9",+ "name": "2A",+ "type": "bidirectional",+ "description": "Common port A of multiplexer 2, switched to one of 2B1-2B4 with continuous channel current rated at 128 mA max."+ },+ {+ "number": "10",+ "name": "2B1",+ "type": "bidirectional",+ "description": "Channel 1 port B of multiplexer 2, connected to 2A when S1 = L and S0 = L with 2OE low."+ },+ {+ "number": "11",+ "name": "2B2",+ "type": "bidirectional",+ "description": "Channel 2 port B of multiplexer 2, connected to 2A when S1 = L and S0 = H with 2OE low."+ },+ {+ "number": "12",+ "name": "2B3",+ "type": "bidirectional",+ "description": "Channel 3 port B of multiplexer 2, connected to 2A when S1 = H and S0 = L with 2OE low."+ },+ {+ "number": "13",+ "name": "2B4",+ "type": "bidirectional",+ "description": "Channel 4 port B of multiplexer 2, connected to 2A when S1 = H and S0 = H with 2OE low."+ },+ {+ "number": "14",+ "name": "S0",+ "type": "input",+ "description": "Select input S0 shared by both multiplexers, chooses the B port with S1; TTL-compatible input (VIH min 2 V, VIL max 0.8 V)."+ },+ {+ "number": "15",+ "name": "2OE",+ "type": "input",+ "description": "Active-low output enable for mux 2; high disconnects 2A from 2B1-2B4, TTL-compatible input (VIH min 2 V, VIL max 0.8 V)."+ },+ {+ "number": "16",+ "name": "VCC",+ "type": "power_in",+ "description": "Supply voltage, recommended 4 V to 5.5 V, absolute maximum -0.5 V to 7 V."+ }+ ],+ "provenance": {+ "extractor": "extract_pins 0.3",+ "factory_chain": {+ "factory": "2.0.0",+ "extractor": "extract_pins 0.3",+ "primary_model": "claude-haiku-4-5-20251001",+ "primary_mode": "text",+ "consensus_model": "claude-sonnet-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 23,+ "cost_usd": 0.1523,+ "at": "2026-10-05T22:32:31"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74cbt3253",+ "pages": 23,+ "sha256": "e6985bcba97d587d",+ "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]"+ }+}