Overview
The SN74CBTLV3257PWRG4, produced by Texas Instruments, is a 4-bit 1-of-2 high-speed FET multiplexer/demultiplexer. This device is designed to operate at low voltages and features a partial-power-down mode, making it suitable for a variety of applications where power efficiency and minimal propagation delay are crucial. The SN74CBTLV3257 device allows connections to be made with minimal propagation delay due to its low on-state resistance of the switch.
The device is controlled by the select (S) input, which determines the data flow, and the output-enable (OE) input, which disables the FET multiplexers/demultiplexers when set high. It is fully specified for partial-power-down applications using the Ioff feature, ensuring no damaging current backflow when the device is powered down.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | TSSOP (PW) | - |
| Pins | 16 | - |
| Operating Temperature Range | -40 to 85 | °C |
| VCC Supply Voltage | 2.3 to 3.6 | V |
| High-Level Control Input Voltage (VCC = 2.3 V to 2.7 V) | 1.7 | V |
| High-Level Control Input Voltage (VCC = 2.7 V to 3.6 V) | 2 | V |
| Low-Level Control Input Voltage (VCC = 2.3 V to 2.7 V) | 0.7 | V |
| Low-Level Control Input Voltage (VCC = 2.7 V to 3.6 V) | 0.8 | V |
| On-State Resistance | 5 Ω | Ω |
| Junction-to-Ambient Thermal Resistance | 110.9 | °C/W |
Key Features
- 5-Ω switch connection between two ports
- Rail-to-rail switching on data I/O ports
- Supports partial-power-down mode operation using Ioff
- Latch-up performance exceeds 100 mA per JESD 78, Class II
- ESD protection exceeds JESD 22 – 2000-V Human-Body Model (A114-A) and 200-V Machine Model (A115-A)
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 device?
The SN74CBTLV3257 is a 4-bit 1-of-2 high-speed FET multiplexer/demultiplexer.
- What is the operating temperature range of the SN74CBTLV3257?
The operating temperature range is -40°C to 85°C.
- What is the on-state resistance of the switch in the SN74CBTLV3257?
The on-state resistance is 5 Ω.
- Does the SN74CBTLV3257 support partial-power-down mode?
Yes, it supports partial-power-down mode using the Ioff feature.
- What type of ESD protection does the SN74CBTLV3257 have?
The device has ESD protection exceeding JESD 22 – 2000-V Human-Body Model (A114-A) and 200-V Machine Model (A115-A).
- How is the data flow controlled in the SN74CBTLV3257?
The data flow is controlled by the select (S) input and the output-enable (OE) input.
- What is the package type and pin count of the SN74CBTLV3257PWRG4?
The package type is TSSOP (PW) with 16 pins.
- Is the SN74CBTLV3257 recommended for new designs?
No, it is not recommended for new designs; it is in production to support existing customers only.
- What are some common applications of the SN74CBTLV3257?
Common applications include IoT devices, wireless headphones, television sets, and 4-bit bus multiplexing and demultiplexing.
- How should the OE input be configured during power up or power down?
The OE input should be tied to VCC through a pullup resistor to ensure a high-impedance state.
