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SN74CBTLV3257RSVR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, UQFN-16(1.8x2.6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN74CBTLV3257RSVR
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74cbtlv3257rsvr.step/sn74cbtlv3257rsvr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (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, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).