产品概述 返回TOPdQ3嘉泰姆

The CXDR75104/CXDR75105/CXDR75106 provide circuits initialization and timing supervision, primarily for DSP and processor-based systems. During power-on, RESET (RESET) is asserted when supply voltage VCC becomes higher than 1.1 V. Thereafter, the supply voltage supervisor monitors VCC and keeps RESET (RESET) active as long as VCC remains below the threshold voltage VIT+ (1). An internal timer delays the return of the output to the inactive state to ensure proper system reset. The delay time, td, starts after VCC has risen above the threshold voltage VIT+. When the supply voltage drops below the threshold voltage VIT- (2), the outputs becomes active again. No external components are required. All the devices have a fixed-sense threshold voltage VIT- set by an internal voltage divider. The CXDR75104/CXDR75105 incorporate a manual reset input,MR . A low level at MR causes RESET (RESET) to become active. The CXDR75104/CXDR75105/CXDR75106 have WDI pin. The watchdog timer is periodically triggered by a positive or negative transition at WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval, ttout, RESET (RESET) becomes active for the time period td. This event also reinitializes the watchdog timer. Leaving WDI unconnected disables the watchdog. The product spectrum is designed for supply voltages of 2.5V, 3V, 3.3V, and 5V. The circuits are available in a SOT-23-5 package.

   产品特点 返回TOPdQ3嘉泰姆

„ Power-On Reset Generator With Fixed Delay Time of 200ms dQ3嘉泰姆

„ Manual Reset Input (CXDR75104/CXDR75105) dQ3嘉泰姆

„ Available in three RESET Output Options Push-Pull RESET Output (CXDR75104L/CXDR75106) Push-Pull RESET Output (CXDR75104H/CXDR75106) Open-Drain RESET Output (CXDR75105L) dQ3嘉泰姆

„ Supply Voltage Supervision Range 2.5V, 3V, 3.3V, 5V dQ3嘉泰姆

„ Watchdog Timer (CXDR75104/CXDR75105/CXDR75106) dQ3嘉泰姆

„ Supply Current of 10μA at VCC=3.3V dQ3嘉泰姆

„ SOT-23-5 Package dQ3嘉泰姆

„ Temperature Range . . . −40°C to 85°CdQ3嘉泰姆

   应用范围 返回TOPdQ3嘉泰姆

„ Critical μP and μC Power Monitoring dQ3嘉泰姆

„ Industrial Equipment dQ3嘉泰姆

„ Programmable Controls dQ3嘉泰姆

„ Automotive Systems dQ3嘉泰姆

„ Portable/Battery-Powered Equipment dQ3嘉泰姆

„ Intelligent Instruments dQ3嘉泰姆

„ Wireless Communications Systems dQ3嘉泰姆

„ Notebook/Desktop ComputersdQ3嘉泰姆

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