Overview
The SN74CBTLV3257DBQR, produced by Texas Instruments, is a low-voltage 4-bit 1-of-2 FET multiplexer/demultiplexer. This device is designed for high-speed switching applications and features a low on-state resistance, enabling minimal propagation delay. It is fully specified for partial-power-down mode, ensuring safe operation during power-down states. The device is controlled by select (S) and output-enable (OE) inputs, allowing for precise management of data flow between two ports.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Switch Connection Resistance | 5 | Ω |
| Switching Voltage Range | 2.3 to 3.6 | V |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine Model | - |
| Latch-Up Performance | Exceeds 100 mA per JESD 78, Class II | - |
| Package Options | SSOP (16), TSSOP (16), TVSOP (16), SOIC (16), VQFN (16), UQFN (16) | - |
| Package Dimensions | Varying dimensions based on package type (e.g., SSOP: 4.90 mm × 3.90 mm) | mm |
| Junction-to-Ambient Thermal Resistance | 86.7 to 123.1 | °C/W |
Key Features
- Rail-to-rail switching on data I/O ports
- Ioff supports partial-power-down mode operation
- Low on-state resistance of the switch
- High-speed switching capability
- ESD protection exceeds JESD 22 standards
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- Isolation during power off
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 SN74CBTLV3257DBQR?
The SN74CBTLV3257DBQR is a 4-bit 1-of-2 FET multiplexer/demultiplexer, designed for high-speed switching applications.
- What is the on-state resistance of the switch?
The on-state resistance of the switch is 5 Ω.
- What are the package options available for this device?
The device is available in SSOP, TSSOP, TVSOP, SOIC, VQFN, and UQFN packages.
- Does the device support partial-power-down mode?
Yes, the device supports partial-power-down mode through the Ioff feature.
- What is the ESD protection level of this device?
The device has ESD protection exceeding 2000-V Human-Body Model and 200-V Machine Model.
- How is the data flow controlled in the SN74CBTLV3257DBQR?
The data flow is controlled by the select (S) and output-enable (OE) inputs.
- What are some common applications of the SN74CBTLV3257DBQR?
Common applications include IoT devices, wireless headphones, television sets, and 4-bit bus multiplexing and demultiplexing.
- What is the significance of the OE input in this device?
The OE input disables the multiplexer/demultiplexer when it is high, and it should be tied to VCC through a pullup resistor to ensure high-impedance state during power up or down.
- How does the device handle latch-up performance?
The device's latch-up performance exceeds 100 mA per JESD 78, Class II.
- What are the thermal resistance values for different packages?
The junction-to-ambient thermal resistance varies by package, ranging from 86.7 to 123.1 °C/W.
