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SN74CBT3345CPWR
Public Made by Adomby adom
Texas Instruments Analog Switches, Multiplexers, TSSOP-20. 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
markdownSN74CBT3345CPWR
Texas Instruments · Analog Switches, Multiplexers · TSSOP-20
SN74CBT3345CPWR from Texas Instruments, in a TSSOP-20. 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 | OE | input | Output Enable control input; active high enables bus switch to connect A port to B port. |
| 2 | A1 | bidirectional | Bidirectional data I/O port A bit 1; supports 0 to 5V signaling levels. |
| 3 | A2 | bidirectional | Bidirectional data I/O port A bit 2; supports 0 to 5V signaling levels. |
| 4 | A3 | bidirectional | Bidirectional data I/O port A bit 3; supports 0 to 5V signaling levels. |
| 5 | A4 | bidirectional | Bidirectional data I/O port A bit 4; supports 0 to 5V signaling levels. |
| 6 | A5 | bidirectional | Bidirectional data I/O port A bit 5; supports 0 to 5V signaling levels. |
| 7 | A6 | bidirectional | Bidirectional data I/O port A bit 6; supports 0 to 5V signaling levels. |
| 8 | A7 | bidirectional | Bidirectional data I/O port A bit 7; supports 0 to 5V signaling levels. |
| 9 | A8 | bidirectional | Bidirectional data I/O port A bit 8; supports 0 to 5V signaling levels. |
| 10 | GND | power_in | Ground; return path for supply current. |
| 11 | B8 | bidirectional | Bidirectional data I/O port B bit 8; supports 0 to 5V signaling levels. |
| 12 | B7 | bidirectional | Bidirectional data I/O port B bit 7; supports 0 to 5V signaling levels. |
| 13 | B6 | bidirectional | Bidirectional data I/O port B bit 6; supports 0 to 5V signaling levels. |
| 14 | B5 | bidirectional | Bidirectional data I/O port B bit 5; supports 0 to 5V signaling levels. |
| 15 | B4 | bidirectional | Bidirectional data I/O port B bit 4; supports 0 to 5V signaling levels. |
| 16 | B3 | bidirectional | Bidirectional data I/O port B bit 3; supports 0 to 5V signaling levels. |
| 17 | B2 | bidirectional | Bidirectional data I/O port B bit 2; supports 0 to 5V signaling levels. |
| 18 | B1 | bidirectional | Bidirectional data I/O port B bit 1; supports 0 to 5V signaling levels. |
| 19 | OE | input | Output Enable bar control input; active low enables bus switch to connect A port to B port. |
| 20 | VCC | power_in | Power supply voltage; operating range 4V to 5.5V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Interface |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74CBT3345CPWR - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
sn74cbt3345cpwr-etched.step/sn74cbt3345cpwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74cbt3345cpwr.step/sn74cbt3345cpwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (19 pp, sha256
59d117050da3e2a0, retrieved 2026-09-27, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).