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Partname: | 74AC11478NT |
Description: | Octal Dual-Rank D-Type Flip-Flops With 3-State Outputs |
Manufacturer: | Texas Instruments |
Datasheet: | PDF (129K). Click here to download *) |
The 74AC11478 is an 8-bit dual-rank synchronizer circuit designed specifically for data synchronization applications in which the normal setup and hold time specifications are frequently violated. Synchronization of two digital signals operating at different frequencies is a common system problem. This problem is typically solved by synchronizing one of the signals to the local clock through a flip-flop. This solution, however, causes the setup and hold time specifications associated with the flip-flop to be violated. When the setup or hold time of a flip-flop is violated, the output response is uncertain. A flip-flop is metastable if its output hangs up in the region between VIL and VIH. The metastable condition lasts until the flip-flop recovers into one of its two stable states. With conventional flip-flops, this recovery time can be longer than the specified maximum propagation delay. |
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Click here to download 74AC11478NT Datasheet*) |
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