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SN74CB3Q3345PWR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, 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
markdownSN74CB3Q3345PWR
Texas Instruments · Signal Switches, Multiplexers, Decoders · TSSOP-20
SN74CB3Q3345PWR 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 | Active low control logic input; pulling this pin low connects the A side to the B side of all switches. |
| 2 | A1 | bidirectional | Pin 1 on port A; can be an input or output, supports 0 to 5.5V signaling levels. |
| 3 | A2 | bidirectional | Pin 2 on port A; can be an input or output, supports 0 to 5.5V signaling levels. |
| 4 | A3 | bidirectional | Pin 3 on port A; can be an input or output, supports 0 to 5.5V signaling levels. |
| 5 | A4 | bidirectional | Pin 4 on port A; can be an input or output, supports 0 to 5.5V signaling levels. |
| 6 | A5 | bidirectional | Pin 5 on port A; can be an input or output, supports 0 to 5.5V signaling levels. |
| 7 | A6 | bidirectional | Pin 6 on port A; can be an input or output, supports 0 to 5.5V signaling levels. |
| 8 | A7 | bidirectional | Pin 7 on port A; can be an input or output, supports 0 to 5.5V signaling levels. |
| 9 | A8 | bidirectional | Pin 8 on port A; can be an input or output, supports 0 to 5.5V signaling levels. |
| 10 | GND | power_in | Ground (0V) reference; connect a decoupling capacitor (0.1 µF to 10 µF) between VCC and GND for reliable operation. |
| 11 | B8 | bidirectional | Pin 8 on port B; can be an input or output, supports 0 to 5.5V signaling levels. |
| 12 | B7 | bidirectional | Pin 7 on port B; can be an input or output, supports 0 to 5.5V signaling levels. |
| 13 | B6 | bidirectional | Pin 6 on port B; can be an input or output, supports 0 to 5.5V signaling levels. |
| 14 | B5 | bidirectional | Pin 5 on port B; can be an input or output, supports 0 to 5.5V signaling levels. |
| 15 | B4 | bidirectional | Pin 4 on port B; can be an input or output, supports 0 to 5.5V signaling levels. |
| 16 | B3 | bidirectional | Pin 3 on port B; can be an input or output, supports 0 to 5.5V signaling levels. |
| 17 | B2 | bidirectional | Pin 2 on port B; can be an input or output, supports 0 to 5.5V signaling levels. |
| 18 | B1 | bidirectional | Pin 1 on port B; can be an input or output, supports 0 to 5.5V signaling levels. |
| 19 | OE | input | Active high control logic input; pulling this pin high connects the A side to the B side of all switches. |
| 20 | VCC | power_out | Positive power supply (2.3V to 3.6V); connect a decoupling capacitor (0.1 µF to 10 µF) between VCC and GND for reliable operation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |
CAD (KiCad official)
- Symbol:
SN74CB3Q3345PWR - Footprint:
Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm - 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files:
sn74cb3q3345pwr-etched.step/sn74cb3q3345pwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74cb3q3345pwr.step/sn74cb3q3345pwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (20 pp, sha256
33f9b986051e048f, retrieved 2026-10-06, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, 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).