16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

The ABTH16245 devices are 16-bit noninverting 3-state transceivers that provide synchronous two-way Communication between data buses. The control-function implementation minimizes external Timing requirements. These devices CAN be used as two 8-bit transceivers or one 16-bit transceiver. They allow data transmission 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 devices so that the buses are effectively isolated. When VCC is between 0 and 2.1 V, the device 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 is determined by the current-sinking capability of the driver. Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid Logic level. The SN54ABTH16245 is characterized for operation over the full military temperature range of 55C to 125C. The SN74ABTH16245 is characterized for operation from 40C to 85C. By Texas Instruments