X74_298
Quadruple 2-Input Multiplexer with Storage and Negative-Edge Clock
XC3000
| XC4000E
| XC4000X
| XC5200
| XC9000
| Spartan
| SpartanXL
| Virtex
|
Macro
| Macro
| Macro
| Macro
| Macro
| Macro
| Macro
| N/A
|
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X74_298 selects 4-bits of data from two sources (D1 - A1 or D2 - A2) under the control of a common word select input (WS). When WS is Low, D1 - A1 is chosen, and when WS is High, D2 - A2 is chosen. The selected data is transferred into the output register (QD - QA) during the High-to-Low transition of the negative-edge triggered clock (CK).
Inputs
| Outputs
|
WS
| A1 - D1
| A2 - D2
| CK
| QA - QD
|
0
| A1 - D1
| X
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| a1 - d1
|
1
| X
| A2 - D2
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| a2 - d2
|
an - dn = state of referenced input one setup time prior to active clock transition
|
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