Quiet Series Octal Transceiver/Register
74ACQ646 • 74ACTQ646 Quiet Series Octal Transceiver/Register with 3-STATE Outputs
January 1990 Revised September 2000
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Description
74ACQ646 74ACTQ646 Quiet Series Octal Transceiver/Register with 3-STATE Outputs
January 1990 Revised September 2000
74ACQ646 74ACTQ646
Quiet Series Octal Transceiver/Register with 3-STATE Outputs
General Description
The ACQ/ACTQ646 consist of registered bus transceiver circuits, with outputs, D-type flip-flops, and control circuitry providing multiplexed transmission of data directly from the input bus or from the internal storage registers. Data on the A or B bus will be loaded into the respective registers on the LOW-to-HIGH transition of the appropriate clock pin (CPAB or CPBA). The four fundamental handling functions available are illustrated in Figure 1, Figure 2, Figure 3 and Figure 4.
The ACQ/ACTQ utilizes Fairchild Quiet Series technology to guarantee quiet output switching and improved dynamic threshold performance. FACT Quiet Series features GTO output control and undershoot corrector in addition to a split ground bus for superior performance.
Features
s Guaranteed simultaneous switching noise level and dynamic threshold performance
s Guaranteed pin-to-pin skew AC performance s Independent registers for A and B busses s Multiplexed real-time and stored data transfers s 300 mil slim dual-in-line package s Outputs source/sink 24 mA s Faster prop delays than the standard AC/ACT646
Ordering Code:
Order Number Package Number
Package Description
74ACQ646SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74ACQ464ASPC
N24C...
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