36-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

The ABTH32245 are 36-bit (quad 9-bit) noninverting 3-state transceivers designed for synchronous two-way Communication between data buses. The control-function implementation minimizes external Timing requirements. These devices CAN be used as four 9-bit transceivers, two18-bit transceivers, or one 36-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) inputs. The output-enable (OE) inputs CAN be used to disable the device 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 holds unused or floating data inputs at a valid Logic level. By Texas Instruments