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DS1501 Datasheet(PDF) 4 Page - Dallas Semiconductor |
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DS1501 Datasheet(HTML) 4 Page - Dallas Semiconductor |
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4 / 20 page  DS1501/DS1511 Y2KC Watchdog Real-Time Clocks 4 of 20 AC OPERATING CHARACTERISTICS (VCC = 3.3V ±10%, TA = 0°C to +70°C; VCC = 3.3V ±10%, TA = -40°C to +85°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Read Cycle Time tRC 120 ns Address Access Time tAA 120 ns CE to DQ Low-Z tCEL (Note 8) 5 ns CE Access Time tCEA 120 ns CE Data Off Time tCEZ (Note 8) 40 ns OE to DQ Low-Z (0°C to +85°C) tOEL (Note 8) 5 ns OE to DQ Low-Z (-40°C to 0°C) tOEL (Note 8) 2 ns OE Access Time tOEA 100 ns OE Data-Off Time tOEZ (Note 8) 35 ns Output Hold from Address tOH 5 ns Write Cycle Time tWC 120 ns Address Setup Time tAS 0 ns WE Pulse Width tWEW 100 ns CE Pulse Width tCEW 110 ns Data Setup Time tDS 80 ns Data Hold Time tDH 5 ns Address Hold Time tAH 5 ns WE Data-Off Time tWEZ (Note 8) 40 ns Write Recovery Time tWR 15 ns Pulse Width, OE, WE, or CE High PWHIGH 40 ns Pulse Width, OE, WE, or CE Low PWLOW 100 ns Figure 1. Read Cycle Timing t RC t CEA tOEA tCEL tOEL tOH t OEZ t AA VALID DQ0-DQ7 OE CE A0–A4 t CEZ |
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