Texas Instruments SN74AVCH2T45 Dual-Supply Bus Transceiver
Texas Instruments SN74AVCH2T45 Dual-Supply Bus Transceiver is a 2-bit, non-inverting bus transceiver using two configurable power-supply rails. The A port is designed to track VCCA, and the B port is designed to track VCCB. VCCA and VCCB accept any supply voltage from 1.2V to 3.6V. This feature allows universal bidirectional low-voltage translation between 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.
The SN74AVCH2T45 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR pin) input activate either the A-port outputs or the B-port outputs. The device transmits data from the A bus to the B bus when the B-port outputs are activated and from the B bus to the A bus when the A-port outputs are activated. The SN74AVCH2T45 features active bus-hold circuitry, which holds unused or un-driven inputs at a valid logic state. Texas Instruments does not recommend using pull-up or pull-down resistors with the bus-hold circuitry.
Features
- Available in Texas Instruments’ NanoFree™ package
- VCC isolation
- 2-rail design
- I/Os are 4.6V tolerant
- Partial power-down-mode operation
- Bus hold on data inputs
- Latch-up performance exceeds 100mA per JESD 78, Class II
- Maximum data rates
- 500Mbps (1.8V to 3.3V)
- 320Mbps (<1.8V to 3.3V)
- 320Mbps (level-shifting to 2.5V or 1.8V)
- 280Mbps (level-shifting to 1.5V)
- 240Mbps (level-shifting to 1.2V)
- ESD protection exceeds JESD 22
Applications
- Smartphone
- Servers
- Desktop PCs and notebooks
- Other portable devices
Additional Resources
- Application Note: Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters
- Selection Guide: Voltage Translation Buying Guide
- Selection Guide: Logic Guide
- Application Note: Understanding and Interpreting Standard-Logic Data Sheets
- Application Note: Voltage Translation Between 3.3V, 2.5V, 1.8V, and 1.5V Logic Standards
- User Guide: LOGIC Pocket Data Book
Logic Diagram (Positive Logic)
Development Tools
Texas Instruments 5-8-LOGIC-EVM Evaluation Module
Developed to support leaded Logic devices in the DBV, DCK, DCT, DCU, and DRL packages.
Texas Instruments AVCLVCDIRCNTRL-EVM Direction Evaluation Module
Offers support for 1, 2, 4, and 8-ch LVC and AVC family direction-controlled translation devices.