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CAT824TTDI-G Datasheet(PDF) 5 Page - Catalyst Semiconductor |
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CAT824TTDI-G Datasheet(HTML) 5 Page - Catalyst Semiconductor |
5 / 14 page CAT823, CAT824, CAT825 © Catalyst Semiconductor, Inc. 5 Doc. No. MD-3027, Rev. B Characteristics subject to change without notice ELECTRICAL OPERATING CHARACTERISTICS (continued) DC Characteristics: VCC = 3.0V to 5.5V for L/M versions; VCC = 2.0V to 3.6V for the R/S/T/Y/Z version, -40ºC ≤ TA ≤ +85ºC unless otherwise noted. Typical Values at TA = 25ºC and VCC = 5V for L/M versions; VCC = 3.3V for the T/S versions; VCC = 3.0V for the R version; and VCC = 2.5V for the Y/Z versions. Symbol Parameter Conditions Min Typ Max Units WATCHDOG INPUT (CAT823 & CAT824) tWD Watchdog Timeout Period 1.12 1.60 3.20 s tWDI WDI Pulse Width VIL = 0.4V, VIH = 0.8 x VCC 50 ns VIL 0.3 x VCC VIH WDI Input Voltage (3) 0.7 x VCC V WDI = VCC, Time Average 120 160 WDI Input Current (4) WDI = 0V, Time Average -20 -15 µA MANUAL RESET INPUT(CAT823 & CAT825) VIL 0.3 x VCC VIH MR ¯¯¯ Input Voltage 0.7 x VCC V tPB MR ¯¯¯ Pulse Width 1 µs tPDLY MR ¯¯¯ low to Reset Delay 5 µs MR ¯¯¯ Noise Immunity Pulse Width with No Reset 100 ns MR ¯¯¯ Pullup Resistance (internal) 35 52 75 kΩ Notes: (3) WDI is internally serviced within the watchdog period if WDI is left open. (4) The WDI input current is specified as an average input current when the WDI input is driven high or low. The WDI input if connected to a three-stated output device can be disabled in the tristate mode as long as the leakage current is less than 10µA and a maximum capacitance of less than 200pF. To clock the WDI input in the active mode the drive device must be able to source or sink at least 200µA when active. |
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