Features: `State-of-the-Art EPIC-II BE BiCMOS Design Significantly Reduces Power Dissipation`Latch-Up Performance Exceeds 500 mA Per JESD 17`Typical VOLP (Output Ground Bounce) < 1 V at VCC = 5 V, TA = 25°C`Ioff and Power-Up 3-State Support Hot Insertion`High-Drive Outputs (32-mA IOH, 64-mA IOL...
SN54ABTH245: Features: `State-of-the-Art EPIC-II BE BiCMOS Design Significantly Reduces Power Dissipation`Latch-Up Performance Exceeds 500 mA Per JESD 17`Typical VOLP (Output Ground Bounce) < 1 V at VCC = 5 V...
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Features: PinoutSpecificationsDescriptionThe SN54/74LS147 and SN54/74LS148 are Priority Encoders. ...
PinoutDescriptionThe LS155 and LS156 are Dual 1-of-4 Decoder/Demultiplexers with common Address in...

These octal bus transceivers SN54ABTH245 are designed for asynchronous communication between data buses. The SN54ABTH245 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.
When VCC is between 0 and 2.1 V, the SN54ABTH245 is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 2.1 V, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor SN54ABTH245 is determined by the current-sinking capability of the driver.
SN54ABTH245 is fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the SN54ABTH245 when it is powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.
Active bus-hold circuitry of SN54ABTH245 is provided to hold unused or floating data inputs at a valid logic level.
The SN54ABTH245 is characterized for operation over the full military temperature range of 55°C to 125°C.
The SN74ABTH245 is characterized for operation from 40°C to 85°C.