The SN74CBTLV3257 device is a 1-of-8 high-speed FET multiplexer/demultiplexer. The low on-state resistance of the switch allows connections to be made with minimal propagation delay. The select inputs (S0, S1, S2) control the data flow. The FET multiplexers/demultiplexers are disabled when the output-enable ( OE) input is high. This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current cannot backflow through the device when it is powered down. The device has isolation during power off. To ensure the high-impedance state during power up or power down, OE must be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | SN74CBTLV3257 Low-Voltage 4-Bit 1-of-2 FET Multiplexer/Demultiplexer datasheet (Rev. N) | PDF | HTML | Jul 15, 2026 |
| Application note | Selecting the Correct Texas Instruments Signal Switch (Rev. E) | PDF | HTML | Jun 2, 2022 | |
| Application note | Multiplexers and Signal Switches Glossary (Rev. B) | PDF | HTML | Dec 1, 2021 | |
| Application brief | Enabling SPI-Based Flash Memory Expansion by Using Multiplexers (Rev. B) | PDF | HTML | Oct 7, 2021 | |
| Application brief | Eliminate Power Sequencing with Powered-off Protection Signal Switches (Rev. C) | PDF | HTML | Jan 6, 2021 |
For additional terms or required resources, click any title below to view the detail page where available.
This board supports: TAS2555YZEVM, TAS2557EVM and TAS2559EVM.
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
| SSOP (DBQ) | 16 | Ultra Librarian |
| TVSOP (DGV) | 16 | Ultra Librarian |
| VQFN (RGY) | 16 | Ultra Librarian |
| UQFN (RSV) | 16 | Ultra Librarian |
| SOIC (D) | 16 | Ultra Librarian |
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