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MAX699EWE Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX699EWE Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 4 page Low-Cost, Power-On Reset and Watchdog Controllers Pin Description PIN SO PDIP NAME FUNCTION 1, 4, 9 3, 4, 8 GND Chip Power Ground 2, 3 1, 2 VCC +5V Sense Input and MAX698/MAX699 Chip Power 5–8, 10–14 5, 6 N.C. No Connection 10 6 WDI (MAX699 Only) (MAX699 Only.) A three-level input. If WDI remains high or low for more than the watchdog timeout period, RESET pulses low (WDO also goes low on the MAX699 SO package). If WDI is unconnected, the watchdog circuit is disabled. 14 — WDO (MAX699 Only) (MAX699 Only.) Goes low when WDI remains high or low for more than the watchdog timeout period. WDO is set high at the next WDI transition. If WDI is unconnected or at midsupply, WDO remains high. WDO also remains high when VCC falls below 4.4V. 15 7 RESET Goes low when VCC falls below internally set threshold (see the Electrical Characteristics table). 16 — RESET Goes high when VCC falls below internally set threshold. WDI* WATCHDOG TIMER RESET TIMER VCC VCC GND WDO* RESET RESET* POWER-ON RESET 4.65V MAX698 MAX699 *WDI ON MAX699 ONLY RESET ON SO PACKAGE ONLY WDO ON SO MAX699 ONLY Figure 1. Block Diagram _______________________________________________________________________________________ 3 |
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