These 10-bit Flip-Flops SN54AS821A SN74AS821A feature 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. They are particularly suitable for implementing wider Buffer Registers I/O ports, bidirectional bus drivers with parity, and working Registers The ten Flip-Flops are edge-triggered D-type Flip-Flops On the positive transition of the Clock (CLK) input, the Q outputs are true to the data (D) input. A buffered output-enable (OE) input CAN be used to place the ten outputs in either a normal Logic state (high or low Logic levels) or a high- impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines without Interface or pullup components. OE does not affect the internal operation of the Flip-Flops Previously stored data CAN be retained or new data CAN be entered while the outputs are in the high-impedance state. The SN54AS821A is characterized for operation over the full military temperature range of 55C to 125C. The SN74AS821A is characterized for operation from 0C to 70C. By Texas Instruments
Part Manufacturer Description Datasheet Samples
SN54AS821AJT Texas Instruments 10-Bit Bus Interface Flip-Flops With 3-State Outputs 24-CDIP -55 to 125
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SN54AS821A Pinout, Pinouts
SN54AS821A pinout,Pin out
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