Features for the SN74AVC2T45
- Available in the Texas Instruments NanoFree™ Package
- VCC Isolation Feature: If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State
- Dual Supply Rail Design
- I/Os Are 4.6V Over Voltage Tolerant
- Ioff Supports Partial-Power-Down Mode Operation
- Max 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)
- Latch-Up Performance Exceeds 100mA Per JESD 78, Class II
- ESD Protection Exceeds JESD 22
Description for the SN74AVC2T45
This 2-bit non-inverting bus transceiver uses two separate configurable power-supply rails. The A ports are designed to track VCCA and accepts any supply voltage from 1.2V to 3.6V. The B ports are designed to track VCCB and accepts any supply voltage from 1.2V to 3.6V. This allows for universal low-voltage bidirectional translation and level-shifting between any of the 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.
The SN74AVC2T45 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR pin) input activate either the B-port outputs or the A-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 input circuitry on both A and B ports always is active and must have a logic HIGH or LOW level applied to prevent excess leakage current on the internal CMOS structure.