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DS1706REPA Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS1706REPA Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 12 page 1 of 12 FEATURES Halts and restarts an out-of-control microprocessor Holds microprocessor in check during power transients Automatically restarts microprocessor after power failure Monitors pushbutton for external override Accurate 5%, 10% or 20% resets for 3.3V systems and 5% or 10% resets for 5.0V systems Eliminates the need for discrete components 3.3V 20% tolerance for use with 3.0V systems Pin-compatible with the MAXIM MAX705/MAX706 in 8-pin DIP, 8-pin SOIC, and -SOP 8-pin DIP, 8-pin SOIC and 8-pin -SOP packages Industrial temperature range -40 C to +85C PIN ASSIGNMENT DS1705 and DS1706_R/S/T (*DS1706L and DS1706P) PIN DESCRIPTION PBRST - Pushbutton Reset Input VCC - Power Supply GND - Ground IN - Input NMI - Non-maskable Interrupt ST - Strobe Input RST - Active Low Reset Output *RST - Active High Reset Output (DS1706P and DS1706L only) WDS - Watchdog Status Output DESCRIPTION The DS1705/DS1706 3.3- or 5.0-Volt MicroMonitor monitors three vital conditions for a microprocessor: power supply, software execution, and external override. A precision temperature compensated reference and comparator circuit monitor the status of VCC at the device and at an upstream point for maximum protection. When the sense input detects an out-of-tolerance condition, a non-maskable interrupt is generated. As the voltage at the device degrades, an internal power fail signal is generated which forces DS1705/DS1706 3.3V and 5.0V MicroMonitor 19-5212; Rev 4/10 www.maxim-ic.com 8-Pin -SOP (118-mil) See Mech. Drawings Section on website RST(*RST) WDS PBRST VCC ST NMI IN GND 1 2 3 4 8 7 6 5 8-Pin DIP (300 -mil) PBRST VCC GND IN WDS RST ST NMI 1 2 3 4 8 7 6 5 8-Pin SOIC (150-mil) 1 2 3 4 8 7 6 5 PBRST VCC GND IN WDS RST(*RST) ST NMI |
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