SN74ALVCH245中文资料具有三态输出的八路总线收发器数据手册TI规格书

描述 Description

This octal bus transceiver is designed for 1.65-V to 3.6-V VCC operation.
The SN74ALVCH245 is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE)\\ input can be used to disable the device so the buses are effectively isolated.
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.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

特性 Features

• Operates From 1.65 V to 3.6 V
• Max tpd of 3.4 ns at 3.3 V
• ±24-mA Output Drive at 3.3 V
• Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II