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DS1232SN Datasheet(PDF) 7 Page - Dallas Semiconductor |
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DS1232SN Datasheet(HTML) 7 Page - Dallas Semiconductor |
7 / 7 page DS1232/DS1232S 7 of 7 AC ELECTRICAL CHARACTERISTICS (0 °C to 70°C; V CC=5V ± 10%) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES PBRST = VIL tPB 20 ms RESET Active Time tRST 250 610 1000 ms ST Pulse Width tST 20 ns 6, 8 VCC Fail Detect to RST and RST tRPD 100 175 µs VCC Slew Rate 4.75V to 4.25V tF 300 µs VCC Detect to RST and RST Transition tRPU 250 610 1000 ms 4 VCC Slew Rate 4.25V to 4.75V tR 05 µs PBRST Stable Low to RST and RST tPDLY 20 ms NOTES: 1. All voltages referenced to ground. 2. Measured with outputs open. 3. PBRST is internally pulled up to VCC with an internal impedance of 10k typical. 4. tR = 5 µs. 5. RST is an open-drain output. 6. Must not exceed tTD minimum. See Table 1. 7. 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. 8. Watchdog can not be disabled. It must be strobed to avoid resets. |
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