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XM20C64 Datasheet(PDF) 5 Page - Xicor Inc. |
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XM20C64 Datasheet(HTML) 5 Page - Xicor Inc. |
5 / 11 page XM20C64 5 A.C. CHARACTERISTICS (Over the recommended operating conditions unless otherwise specified) Read Cycle Limits Limits Symbol Parameter Min. Max. Units tRC Read Cycle Time 55 ns tCE Chip Enable Access Time 55 ns tAA Address Access Time 55 ns tOE Output Enable Access Time 30 ns tLZ(3) CE Low to Output in Low Z 0 ns tOLZ(3) OE Low to Output in Low Z 0 ns tHZ(3) CE High to Output in Low Z 0 25 ns tOHZ(3) OE High to Output in Low Z 0 25 ns tOH Output Hold 0 ns 3874 PGM T03 MODE SELECTION CE WE NE OE Mode I/O State Power H X X X Module Not Selected High Z Standby L H H L Read RAM Active Data Output Active L L H X Write RAM Data Input Active L L L H Issue Software Command Data Input Active L H H H Output Disabled High Z Active L H L L Hardware Array Recall High Z Active L H L H No Operation High Z Active L L L L Not Allowed High Z Active 3874 PGM T04.1 Read Cycle Timing Diagram 3874 FHD F05 Note: (3) tLZ min., tHZ min., tOLZ min., and tOHZ min. are periodically sampled and not 100% tested. tHZ max. and tOHZ max. are measured from the point when CE or OE return high (whichever occurs first) to the time when the outputs are no longer driven. tCE tRC ADDRESS CE OE tOE tLZ tOLZ tOH tAA tHZ tOHZ I/O tOE |
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