Overview
The SN74CBTLV3257 device, produced by Texas Instruments, is a 4-bit 1-of-2 high-speed FET multiplexer/demultiplexer. This component is designed to facilitate efficient data flow with minimal propagation delay due to its low on-state resistance. The select (S) input controls the data flow, and the output-enable (OE) input disables the FET multiplexers/demultiplexers when set high. The device is fully specified for partial-power-down applications using the Ioff feature, which prevents damaging current backflow when the device is powered down. It also ensures isolation during power off and supports high-impedance states during power transitions.
Key Specifications
| Parameter | Minimum | Maximum | Unit |
|---|---|---|---|
| VCC Supply Voltage | 2.3 | 3.6 | V |
| VIH High-Level Control Input Voltage (VCC = 2.3 V to 2.7 V) | 1.7 | - | V |
| VIH High-Level Control Input Voltage (VCC = 2.7 V to 3.6 V) | 2 | - | V |
| VIL Low-Level Control Input Voltage (VCC = 2.3 V to 2.7 V) | 0.7 | - | V |
| VIL Low-Level Control Input Voltage (VCC = 2.7 V to 3.6 V) | 0.8 | - | V |
| TA Operating Free-Air Temperature | -40 | 85 | °C |
| Switch On-State Resistance | 5 | - | Ω |
| Package Type | TSSOP (16 pins) | - | - |
| Package Size | 5.00 mm × 4.40 mm | - | - |
Key Features
- 5-Ω switch connection between two ports
- Rail-to-rail switching on data I/O ports
- Ioff supports partial-power-down mode operation
- 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)
- Wireless Headphones
- Television Sets
- 4-Bit Bus Multiplexing and Demultiplexing
- Defense, Aerospace, and Medical Applications (for the -EP version)
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 controls the data flow in the SN74CBTLV3257?
The select (S) input controls the data flow.
- How is the device disabled?
The FET multiplexers/demultiplexers are disabled when the output-enable (OE) input is high.
- What is the significance of the Ioff feature?
The Ioff feature ensures that damaging current does not backflow through the device when it is powered down.
- What kind of ESD protection does the device offer?
The device offers ESD protection exceeding JESD 22 – 2000-V human-body model (A114-A) and 200-V machine model (A115-A).
- What are the operating temperature ranges for the SN74CBTLV3257?
The operating free-air temperature range is from -40°C to 85°C.
- What is the on-state resistance of the switch?
The on-state resistance of the switch is 5 Ω.
- What types of applications is the SN74CBTLV3257 suitable for?
The device is suitable for IoT, wireless headphones, television sets, 4-bit bus multiplexing and demultiplexing, and defense, aerospace, and medical applications (for the -EP version).
- What package types are available for the SN74CBTLV3257?
The device is available in TSSOP (16 pins), SSOP (16 pins), and TVSOP (16 pins) packages.
- Is the SN74CBTLV3257 recommended for new designs?
No, Texas Instruments does not recommend using this part in new designs; it is in production to support existing customers only.
