This 8-bit non-inverting bus transceiver uses two separate configurable power-supply rails. The SN74LVC8T245-Q1 is optimized to operate with V_CCA and V_CCB set at 1.65 V to 5.5 V. The A port is designed to track V_CCA. V_CCA accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track V_CCB. V_CCB accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5.5-V voltage nodes.

The SN74LVC8T245-Q1 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input 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 is always active and must have a logic HIGH or LOW level applied to prevent excess I_CC and I_CCZ.

The SN74LVC8T245-Q1 is designed so that the control pins (DIR 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, all outputs are in the high-impedance state.

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

• Qualified for Automotive Applications
• Control Inputs VIH/VIL Levels Are Referenced to VCCA Voltage
• VCC Isolation Feature – If Either VCC Input Is at GND, All Are in the High-Impedance State
• Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.65-V to 5.5-V Power-Supply Range

• Technology Family
• LVC
• Applications
• GPIO
• Bits (#)
• 8
• High input voltage (Min) (Vih)
• 1.08
• High input voltage (Max) (Vih)
• 5.5
• Vout (Min) (V)
• 1.65
• Vout (Max) (V)
• 5.5
• IOH (Max) (mA)
• -32
• IOL (Max) (mA)
• 32
• Rating
• Automotive

SN74LVC8T245-Q1的完整型号有：SN74LVC8T245QPWRQ1，以下是这些产品的关键参数及官网采购报价：

SN74LVC8T245QPWRQ1，工作温度：-40 to 125，封装：TSSOP (PW)-24，包装数量MPQ：2000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SN74LVC8T245QPWRQ1的批量USD价格：.621（1000+）

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