SN74LVC8T245-Q1是TI公司的一款方向控制电压转换产品，SN74LVC8T245-Q1是汽车类 8 位双电源总线收发器具有可配置电压转换和 3 态输出，本页介绍了SN74LVC8T245-Q1的产品说明、应用、特性等，并给出了与SN74LVC8T245-Q1相关的TI元器件型号供参考。
SN74LVC8T245-Q1 - 汽车类 8 位双电源总线收发器具有可配置电压转换和 3 态输出 - 方向控制电压转换 - 电压电平转换 - TI公司（Texas Instruments，德州仪器）
This 8-bit non-inverting bus transceiver uses two separate configurable power-supply rails. The SN74LVC8T245-Q1 is optimized to operate with VCCA and VCCB set at 1.65 V to 5.5 V. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track VCCB. VCCB 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 ICC and ICCZ.
The SN74LVC8T245-Q1 is designed so that the control pins (DIR and OE) are supplied by VCCA.
This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
The VCC isolation feature ensures that if either VCC 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 VCC 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
