SN74AVC2T45 - Dual-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation and 3-State Outputs

This 2-bit non-inverting bus transceiver uses two separate configurable power-supplyrails. The A ports are designed to track V_CCA and accepts any supply voltagefrom 1.2 V to 3.6 V. The B ports are designed to track V_CCB and accepts anysupply voltage from 1.2 V to 3.6 V. This allows for universal low-voltage bidirectional translationand level-shifting between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.

The SN74AVC2T45 is designed for asynchronous communication between two data buses. Thelogic levels of the direction-control (DIR pin) input activate either the B-port outputs or theA-port outputs. The device transmits data from the A bus to the B bus when the B-port outputs areactivated and from the B bus to the A bus when the A-port outputs are activated. The inputcircuitry on both A and B ports always is active and must have a logic HIGH or LOW level applied toprevent excess leakage current on the internal CMOS structure.

• Available in the Texas Instruments NanoFree™ Package
• V_CC Isolation Feature: If Either V_CC Input Is at GND, Both Ports Are in the High-Impedance State
• Dual Supply Rail Design
• I/Os Are 4.6-V Over Voltage Tolerant
• I_off Supports Partial-Power-Down Mode Operation
• Max Data Rates
  • 500 Mbps (1.8 V to 3.3 V)
  • 320 Mbps (<1.8 V to 3.3 V )
  • 320 Mbps (Level-Shifting to 2.5 V or 1.8 V)
  • 280 Mbps (Level-Shifting to 1.5 V)
  • 240 Mbps (Level-Shifting to 1.2 V)
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22

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