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HD74ALVCH16721

Hitachi Semiconductor
Part Number HD74ALVCH16721
Manufacturer Hitachi Semiconductor
Description 3.3-V 20-bit Flip Flops with 3-state Outputs
Published Mar 23, 2005
Detailed Description HD74ALVCH16721 3.3-V 20-bit Flip Flops with 3-state Outputs ADE-205-139B (Z) 3rd. Edition December 1999 Description The...
Datasheet PDF File HD74ALVCH16721 PDF File

HD74ALVCH16721
HD74ALVCH16721

Overview
HD74ALVCH16721 3.
3-V 20-bit Flip Flops with 3-state Outputs ADE-205-139B (Z) 3rd.
Edition December 1999 Description The HD74ALVCH16721’s twenty flip flops are edge triggered D-type flip flops with qualified clock storage.
On the positive transition of the clock (CLK) input, the device provides true data at the Q outputs, provided that the clock enable (CLKEN ) input is low.
If CLKEN is high, no data is stored.
A buffered output enable ( OE) input can be used to place the twenty outputs in either a normal logic state (high or low level) 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 need for interface or pullup components.
The output enable (OE) input does 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 high impedance state.
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