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DS1231S Datasheet(PDF) 8 Page - Dallas Semiconductor |
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DS1231S Datasheet(HTML) 8 Page - Dallas Semiconductor |
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8 / 9 page  DS1231/S 022698 8/9 AC ELECTRICAL CHARACTERISTICS (0 °C to 70°C; VCC = 5V + 10%) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES VTP to NMI Delay tIPD 1.1 µs VCC Slew Rate 4.75-4.25V tF 300 µs VCC Detect to RST and RST tRPD 100 ns VCC Detect to NMI tIPU 200 µs 4 VCC Detect to RST and RST tRPU 150 500 1000 ms 4 VCC Slew Rate 4.25-4.75V tR 0 ns NOTES: 1. All voltages referenced to ground. 2. VCC = +5.0 volts with outputs open. 3. Measured with outputs open. 4. tR = 5 µs. 5. RST is an open drain output and requires a pull–up resister. 6. RST remains within 0.5V of VCC on power–down until VCC drops below 2.0V. RST remains within 0.5V of GND on power–down until VCC drops below 2.0V. TIMING DIAGRAM: POWER-UP VTP tR MODE=VCC tRPU VCC NMI INPUT PIN 1 MODE=GND 4.5V 4.25V 4.75V tIPU VOH VOH VOL RST RST |
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