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MAX6751KA26 Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX6751KA26 Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 14 page µP Reset Circuits with Capacitor-Adjustable Reset/Watchdog Timeout Delay _______________________________________________________________________________________ 3 ELECTRICAL CHARACTERISTICS (continued) (VCC = +1.2V to +5.5V, TA = TMIN to TMAX, unless otherwise specified. Typical values are at VCC = +5V and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CSWT = 1500pF 11.38 15.18 18.98 Fast Watchdog Timeout Period, SET Ratio = 64, (MAX6752/MAX6753) tWD1 CSWT = 100pF 1.01 ms Fast Watchdog Minimum Period (MAX6752/MAX6753) 2000 ns SWT Ramp Current IRAMP VSWT = 0 to 1.23V, VCC = 1.6V to 5V 200 250 300 nA SWT Ramp Threshold VRAMP VCC = 1.6V to 5V (VRAMP rising) 1.173 1.235 1.297 V VCC ≥ 1.0V, ISINK = 50µA 0.3 VCC ≥ 2.7V, ISINK = 1.2mA 0.3 RESET Output Voltage LOW Open-Drain, Push-Pull (Asserted) VOL VCC ≥ 4.5V, ISINK = 3.2mA 0.4 V VCC ≥ 1.8V, ISOURCE = 200µA 0.8 x VCC VCC ≥ 2.25V, ISOURCE = 500µA 0.8 x VCC RESET Output Voltage HIGH, Push-Pull (Not Asserted) VOH VCC ≥ 4.5V, ISOURCE = 800µA 0.8 x VCC V RESET Output Leakage Current, Open Drain ILKG VCC > VTH, reset not asserted, VRESET = 5.5V 1.0 µA DIGITAL INPUTS (MR, SET0, SET1, WDI, WDS) VIL 0.8 VIH VCC ≥ 4.0V 2.4 VIL VCC < 4.0V 0.3 x VCC Input Logic Levels VIH 0.7 x VCC V MR Minimum Pulse Width 1µs MR Glitch Rejection 100 ns MR to RESET Delay 200 ns MR Pullup Resistance Pullup to VCC 12 20 28 k Ω WDI Minimum Pulse Width 300 ns RESET IN RESET IN Threshold VRESET IN TA = -40°C to +125°C 1.216 1.235 1.254 V RESET IN Leakage Current IRESET IN -50 ±1 +50 nA RESET IN to RESET Delay RESET IN falling at 1mV/µs 20 µs Note 1: Production testing done at TA = +25°C. Over temperature limits are guaranteed by design. |
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