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SN74CBTLV3257RSVR
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Texas Instruments Signal Switches, Multiplexers, Decoders, UQFN-16(1.8x2.6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+53@@ -0,0 +1,53 @@+# SN74CBTLV3257RSVR++**Texas Instruments** · Signal Switches, Multiplexers, Decoders · UQFN-16(1.8x2.6)++SN74CBTLV3257RSVR from Texas Instruments, in a UQFN-16(1.8x2.6). 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 | 1B2 | bidirectional | Channel 1 data port B2; FET switch connecting to common port 1A when selected and OE is low |+| 2 | 1A | bidirectional | Channel 1 common port A; multiplexer output selecting between 1B1 and 1B2 based on S input |+| 3 | 2B1 | bidirectional | Channel 2 data port B1; FET switch connecting to common port 2A when selected and OE is low |+| 4 | 2B2 | bidirectional | Channel 2 data port B2; FET switch connecting to common port 2A when selected and OE is low |+| 5 | 2A | bidirectional | Channel 2 common port A; multiplexer output selecting between 2B1 and 2B2 based on S input |+| 6 | GND | power_in | Ground; electrical reference for all signal and power pins |+| 7 | 3A | bidirectional | Channel 3 common port A; multiplexer output selecting between 3B1 and 3B2 based on S input |+| 8 | 3B2 | bidirectional | Channel 3 data port B2; FET switch connecting to common port 3A when selected and OE is low |+| 9 | 3B1 | bidirectional | Channel 3 data port B1; FET switch connecting to common port 3A when selected and OE is low |+| 10 | 4A | bidirectional | Channel 4 common port A; multiplexer output selecting between 4B1 and 4B2 based on S input |+| 11 | 4B2 | bidirectional | Channel 4 data port B2; FET switch connecting to common port 4A when selected and OE is low |+| 12 | 4B1 | bidirectional | Channel 4 data port B1; FET switch connecting to common port 4A when selected and OE is low |+| 13 | OE | input | Output enable input, active low; disables all multiplexer switches when high providing device isolation |+| 14 | VCC | power_in | Power supply voltage; operating range 2.3V to 3.6V with 0.1µF bypass capacitor recommended |+| 15 | S | input | Channel select input; when low selects xB1 to connect to xA, when high selects xB2 to connect to xA |+| 16 | 1B1 | bidirectional | Channel 1 data port B1; FET switch connecting to common port 1A when selected and OE is low |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | UQFN-16(1.8x2.6) |+| Category | Logic |+| Pins | 16 |++## CAD (KiCad official)++- Symbol: `SN74CBTLV3257RSVR`+- Footprint: `Package_DFN_QFN:UQFN-16_1.8x2.6mm_P0.4mm`+- 3D model: UQFN-16(1.8x2.6), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.55 mm nominal UFQFPN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)+- 3D model files: `sn74cbtlv3257rsvr-etched.step` / `sn74cbtlv3257rsvr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74cbtlv3257rsvr.step` / `sn74cbtlv3257rsvr.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/sn74cbtlv3257) (41 pp, sha256 `555eb132515a79f6`, retrieved 2026-10-01, 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-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/sn74cbtlv3257rsvr-datasheet.pdf)
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FET switch connecting to common port 1A when selected and OE is low"+ },+ {+ "number": "2",+ "name": "1A",+ "type": "bidirectional",+ "description": "Channel 1 common port A; multiplexer output selecting between 1B1 and 1B2 based on S input"+ },+ {+ "number": "3",+ "name": "2B1",+ "type": "bidirectional",+ "description": "Channel 2 data port B1; FET switch connecting to common port 2A when selected and OE is low"+ },+ {+ "number": "4",+ "name": "2B2",+ "type": "bidirectional",+ "description": "Channel 2 data port B2; FET switch connecting to common port 2A when selected and OE is low"+ },+ {+ "number": "5",+ "name": "2A",+ "type": "bidirectional",+ "description": "Channel 2 common port A; multiplexer output selecting between 2B1 and 2B2 based on S input"+ },+ {+ "number": "6",+ "name": "GND",+ "type": "power_in",+ "description": "Ground; electrical reference for all signal and power pins"+ },+ {+ "number": "7",+ "name": "3A",+ "type": "bidirectional",+ "description": "Channel 3 common port A; multiplexer output selecting between 3B1 and 3B2 based on S input"+ },+ {+ "number": "8",+ "name": "3B2",+ "type": "bidirectional",+ "description": "Channel 3 data port B2; FET switch connecting to common port 3A when selected and OE is low"+ },+ {+ "number": "9",+ "name": "3B1",+ "type": "bidirectional",+ "description": "Channel 3 data port B1; FET switch connecting to common port 3A when selected and OE is low"+ },+ {+ "number": "10",+ "name": "4A",+ "type": "bidirectional",+ "description": "Channel 4 common port A; multiplexer output selecting between 4B1 and 4B2 based on S input"+ },+ {+ "number": "11",+ "name": "4B2",+ "type": "bidirectional",+ "description": "Channel 4 data port B2; FET switch connecting to common port 4A when selected and OE is low"+ },+ {+ "number": "12",+ "name": "4B1",+ "type": "bidirectional",+ "description": "Channel 4 data port B1; FET switch connecting to common port 4A when selected and OE is low"+ },+ {+ "number": "13",+ "name": "OE",+ "type": "input",+ "description": "Output enable input, active low; disables all multiplexer switches when high providing device isolation"+ },+ {+ "number": "14",+ "name": "VCC",+ "type": "power_in",+ "description": "Power supply voltage; operating range 2.3V to 3.6V with 0.1µF bypass capacitor recommended"+ },+ {+ "number": "15",+ "name": "S",+ "type": "input",+ "description": "Channel select input; when low selects xB1 to connect to xA, when high selects xB2 to connect to xA"+ },+ {+ "number": "16",+ "name": "1B1",+ "type": "bidirectional",+ "description": "Channel 1 data port B1; FET switch connecting to common port 1A when selected and OE is low"+ }+ ],+ "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-5-5",+ "consensus": "agreed",+ "guards": "pin_guards 0.1: passed",+ "guard_notes": [],+ "pages_sent": 41,+ "cost_usd": 0.2625,+ "at": "2026-10-01T17:50:09"+ },+ "datasheet": {+ "url": "https://www.ti.com/cn/lit/gpn/sn74cbtlv3257",+ "pages": 41,+ "sha256": "555eb132515a79f6",+ "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]"+ }+}