Overview
The SN74CBTLV3257 is a 4-bit 1-of-2 high-speed FET multiplexer/demultiplexer produced by Texas Instruments. This device is designed to handle low-voltage operations and offers high-speed switching capabilities with minimal propagation delay. The low on-state resistance of the switch allows connections to be made efficiently, making it suitable for a variety of applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 2.3 | - | 3.6 | V |
| Input Voltage (VI) | -0.5 | - | 4.6 | V |
| Continuous Channel Current | - | - | 128 | mA |
| Operating Free-Air Temperature (TA) | -55 | - | 125 | °C |
| ON-State Resistance (RON) | - | 5 | - | Ω |
| Propagation Delay (tpd) | 0.25 | - | 0.35 | ns |
Key Features
- Low on-state resistance of 5 Ω, allowing minimal propagation delay.
- Rail-to-rail switching on data I/O ports.
- Ioff supports partial-power-down mode operation, preventing backflow of damaging current.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
- ESD protection exceeds JESD 22 – 2000-V Human-Body Model and 200-V Machine Model.
- Common select (S) and output enable (OE) inputs for controlling data flow.
Applications
- Internet of Things (IoT) devices.
- Wireless headphones.
- Television sets.
- 4-bit bus multiplexing and demultiplexing.
Q & A
- What is the primary function of the SN74CBTLV3257?
The SN74CBTLV3257 is a 4-bit 1-of-2 high-speed FET multiplexer/demultiplexer, used for multiplexing and demultiplexing data signals.
- What is the typical on-state resistance of the SN74CBTLV3257?
The typical on-state resistance is 5 Ω.
- What is the maximum continuous channel current for the SN74CBTLV3257?
The maximum continuous channel current is 128 mA.
- What are the operating temperature ranges for the SN74CBTLV3257?
The operating free-air temperature range is from -55°C to 125°C.
- How does the Ioff feature benefit the SN74CBTLV3257?
The Ioff feature ensures that damaging current will not backflow through the device when it is powered down, supporting partial-power-down mode operation.
- What kind of ESD protection does the SN74CBTLV3257 offer?
The device offers ESD protection exceeding JESD 22 – 2000-V Human-Body Model and 200-V Machine Model.
- How are the select and output enable inputs used in the SN74CBTLV3257?
The select (S) input controls the data flow, and the output-enable (OE) input disables the FET multiplexers/demultiplexers when high.
- What is the recommended way to ensure high-impedance state during power up or power down?
The OE input should be tied to VCC through a pullup resistor.
- What are some common applications of the SN74CBTLV3257?
Common applications include IoT devices, wireless headphones, television sets, and 4-bit bus multiplexing and demultiplexing.
- What are the available package options for the SN74CBTLV3257?
The device is available in various packages including SSOP, TSSOP, TVSOP, SOIC, VQFN, and UQFN.
