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DS1501WN+ Datasheet(PDF) 6 Page - Maxim Integrated Products |
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DS1501WN+ Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 22 page DS1501/DS1511 Y2KC Watchdog Real-Time Clocks 6 of 22 Figure 4. Burst Mode Timing Waveform A 0–A 4 DQ0 – DQ7 O E , W E , OR C E 13h PW HIG H PW LOW POWER-UP/DOWN CHARACTERISTICS PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS tPF 0 μs CE or WE at V IH Before Power-Fail VCC Fall Time: VPF(MAX) to VPF(MIN) tF 300 μs VCC Fall Time: VPF(MIN) to VSO tFB 10 μs VCC Rise Time: VPF(MIN) to VPF(MAX) tR 0 μs tREC 35 200 ms VPF to RST High (TA = +25°C) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Expected Data-Retention Time (Oscillator On) tDR (Note 9) 10 Years CAPACITANCE (TA = +25°C) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Capacitance on All Input Pins CIN 10 pF Capacitance on IRQ, PWR, RST, and DQ Pins CIO 10 pF AC TEST CONDITIONS INPUT PULSE LEVELS TIMING MEASUREMENT REFERENCE LEVELS INPUT PULSE RISE AND FALL TIMES OUTPUT LOAD (Y) 50pF + 1TTL Gate Input: 1.5V 0V to 3.0V for 5V operation Output: 1.5V 5ns (W) 25pF + 1 TTL Gate |
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