SN74CBT3257CD
Active5-V, 2:1 (SPDT), 4-CHANNEL FET BUS SWITCH WITH –2-V UNDERSHOOT PROTECTION
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SN74CBT3257CD
Active5-V, 2:1 (SPDT), 4-CHANNEL FET BUS SWITCH WITH –2-V UNDERSHOOT PROTECTION
Technical Specifications
Parameters and characteristics for this part
| Specification | SN74CBT3257CD |
|---|---|
| Circuit [custom] | 4 |
| Circuit [custom] | 2:1 |
| Independent Circuits | 1 |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 16-SOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Supplier Device Package | 16-SOIC |
| Type | Multiplexer/Demultiplexer |
| Voltage - Supply [Max] | 5.5 V |
| Voltage - Supply [Min] | 4.5 V |
| Voltage Supply Source | Single Supply |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 1.26 | |
| 10 | $ 1.12 | |||
| 40 | $ 1.07 | |||
| 120 | $ 0.88 | |||
| 280 | $ 0.82 | |||
| 520 | $ 0.72 | |||
| 1000 | $ 0.57 | |||
| 2520 | $ 0.53 | |||
| 5000 | $ 0.51 | |||
| Texas Instruments | TUBE | 1 | $ 1.08 | |
| 100 | $ 0.73 | |||
| 250 | $ 0.57 | |||
| 1000 | $ 0.38 | |||
Description
General part information
SN74CBT3257C Series
The SN74CBT3257C is a high-speed TTL-compatible FET multiplexer/demultiplexer with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT3257C provides protection for undershoot up to –2 V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state.
The SN74CBT3257C is a 4-bit 1-of-2 multiplexer/demultiplexer with a single output-enable (OE\) input. The select (S) input controls the data path of the multiplexer/demultiplexer. When OE\ is low, the multiplexer/demultiplexer is enabled and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE\ is high, the multiplexer/demultiplexer is disabled and a high-impedance state exists between the A and B ports.
This device is fully specified for partial-power-down applications using Ioff. The Iofffeature ensures that damaging current will not backflow through the device when it is powered down. The device has isolation during power off.
Documents
Technical documentation and resources
