74ABT646

Storage Temperature .............................................−65°C to +150°C
Ambient Temperature under Bias............................−55°C to +125°C
Junction Temperature under Bias............................−55°C to +150°C
VCC Pin Potential to Ground Pin................................. −0.5V to +7.0V
Input Voltage (Note 3)............................................... −0.5V to +7.0V
Input Current (Note 3) .........................................−30 mA to +5.0 mA
Voltage Applied to Any Output

in the Disable or
Power-Off State .........................................................−0.5V to +5.5V
in the HIGH State ..........................................................−0.5V to V_CC

The 74ABT646 consists of bus transceiver circuits with 3- STATE, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input busor from the internal registers. Data on the A or B bus will be clocked into the registers as the appropriate clock pin goes to a high logic level. Control OE  and direction pins are pro-vided to control the transceiver function. In the transceiver mode, data present at the high impedance port may be stored in either the A or the B register or in both. The select controls can multiplex stored and real-time (transparent mode) data. The direction control determines which buswill receive data when the enable control OE is ActiveLOW. In the isolation mode of the 74ABT646 (control OE  HIGH), A data may be stored in the B register and/or B data may be stored inthe A register.