This dual-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track V_CCA. V_CCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track V_CCB. V_CCB accepts any supply voltage from 1.2 V to 3.6 V. This allows for universal low-voltage bidirectional translation between any of the 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V voltage nodes.

The SN74AVC2T245 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode . 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 I_CC and I_CCZ.

The SN74AVC2T245 control pins (DIR1, DIR2, and OE) are supplied by V_CCA.

This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

The V_CC isolation feature ensures that if either V_CC input is at GND, both ports are in the high-impedance state.

To ensure the high-impedance state during power up or power down, OE must be connected to V_CC through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

• Each Channel Has Independent Direction Control
• Control Inputs VIH/VIL Levels Are Referenced to VCCA Voltage
• Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.2 V to 3.6 V Power-Supply Range
• I/Os Are 4.6 V Tolerant
• Ioff Supports Partial-Power-Down Mode Operation
• VCC Isolation Feature - If Either VCC Input is at GND, Both Ports are in High-Impedance State
• Typical Data Rates
  • 500 Mbps (1.8 V to 3.3 V Level-Shifting)
  • 320 Mbps (<1.8 V to 3.3 V Level-Shifting)
  • 320 Mbps (Translate to 2.5 V or 1.8 V)
  • 280 Mbps (Translate to 1.5 V)
  • 240 Mbps (Translate to 1.2 V)
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22
  • 5000 V Human-Body Model (A114-A)
  • 200 V Machine Model (A115-A)
  • 1500 V Charged-Device Model (C101)

• Technology Family
• AVC
• Applications
• JTAG
• Bits (#)
• 2
• High input voltage (Min) (Vih)
• 0.78
• High input voltage (Max) (Vih)
• 3.6
• Vout (Min) (V)
• 1.2
• Vout (Max) (V)
• 3.6
• IOH (Max) (mA)
• -12
• IOL (Max) (mA)
• 12
• Rating
• Catalog

SN74AVC2T245的完整型号有：SN74AVC2T245RSWR，以下是这些产品的关键参数及官网采购报价：

SN74AVC2T245RSWR，工作温度：-40 to 85，封装：UQFN (RSW)-10，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74AVC2T245RSWR的批量USD价格：.323（1000+）

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