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DS1744W-120IND Datasheet(PDF) 8 Page - Dallas Semiconductor |
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DS1744W-120IND Datasheet(HTML) 8 Page - Dallas Semiconductor |
8 / 18 page DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs 8 of 18 DC ELECTRICAL CHARACTERISTICS (VCC = 3.3V ±10%, TA = Over the operating range.) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES Active Supply Current ICC 30 mA 2, 3 TTL Standby Current ( CE = VIH) ICC1 2 mA 2, 3 CMOS Standby Current ( CE ³ VCC - 0.2V) ICC2 2 mA 2, 3 Input Leakage Current (Any Input) IIL -1 +1 mA Output Leakage Current (Any Output) IOL -1 +1 mA Output Logic 1 Voltage (IOUT = -1.0mA) VOH 2.4 1 Output Logic 0 Voltage (IOUT = +2.1mA) VOL 0.4 1 Write Protection Voltage VPF 2.80 2.97 V 1 Battery Switchover Voltage VSO VBAT or VPF V 1, 4 AC CHARACTERISTICS—READ CYCLE (5V) (VCC = 5.0V ±10%, TA = Over the operating range.) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES Read Cycle Time tRC 70 ns Address Access Time tAA 70 ns CE to DQ Low-Z tCEL 5 ns CE Access Time tCEA 70 ns CE Data Off Time tCEZ 25 ns OE to DQ Low-Z tOEL 5 ns OE Access Time tOEA 35 ns OE Data Off Time tOEZ 25 ns Output Hold from Address tOH 5 ns |
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