IDT74LVC16821A

NOTE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.

The IDT74LVC16821A 20-bit Flip-Flop is built using advanced dual metal CMOS technology. This device contains twenty non-inverting D-Type flipflops with 3-State outputs. The device is byte controlled with each byte functioning identically, but independent of each other. Control pins can be shorted together to obtain full 20-bit operation.

The buffered output-enable (OE) inputs place the 20 outputs in either a normal logic state (high or low) or a high-impedance state. In the highimpedance 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 the need for interface drive or pullup components. OE inputs do not affect the internal operation of the flip-flops. Old data can be retained or new data can be entered while the outputs are in the highimpedance state.

All pins of the IDT74LVC16821A can be driven from either 3.3V or 5V devices. This feature allows the use of this device as a Flip-Flop in a mixed 3.3V/5V supply system.

The IDT74LVC16821A has been designed with a ±24mA output driver. This driver is capable of driving a moderate to heavy load while maintaining speed performance.