SP706REN

SP706P/R/S/T, SP708R/S/T ® +3.0V/+3.3V Low Power Microprocessor Supervisory Circuits ■ Precision Low Voltage Monitor: SP706P/R and SP708R at +2.63V SP706S and SP708S at +2.93V SP706T and SP708T at +3.08V ■ RESET Pulse Width - 200ms ■ Independent Watchdog Timer - 1.6 sec Timeout (SP706P/S/R/T) ■ 40µA Maximum Supply Current ■ Debounced TTL/CMOS Manual-Reset Input ■ RESET Asserted Down to VCC = 1V ■ RESET Output: SP706P Active-High SP706R/S/T Active-Low SP708R/S/T Both Active High + Active Low ■ WDI Can Be Left Floating, Disabling the Watchdog Function ■ Built-In Vcc Glitch Immunity ■ Available in 8-pin PDIP, NSOIC, and µSOIC packages ■ Voltage Monitor for Power Failure or Low Battery Warning ■ Pin Compatible Enhancement to Industry Standards 706P/R/S/T and 708R/S/T DESCRIPTION The SP706P/S/R/T, SP708R/S/T series is a family of microprocessor (µP) supervisory circuits that integrate myriad components involved in discrete solutions which monitor power-supply and battery, in µP, and digital systems. The SP706P/S/R/T, SP708R/S/T series will significantly improve system reliability and operational efficiency when compared to results obtained with discrete components. The features of the SP706P/S/R/T, SP708R/S/T series include a watchdog timer, a µP reset, a Power Fail Comparator, and a manual-reset input. The SP706P/ S/R/T, SP708R/S/T series is ideal for +3.0V or +3.3V applications in automotive systems, computers, controllers, and intelligent instruments. The SP706P/S/R/T, SP708R/S/T series is an ideal solution for systems in which critical monitoring of the power supply to the µP and related digital components is demanded. Part Number RESET Active RESET Threshold Manual Reset PFI Accuracy Watchdog Input SP706P HIGH 2.63V YES 4% YES SP706R LOW 2.63V YES 4% YES SP706S LOW 2.93V YES 4% YES SP706T LOW 3.08V YES 4% YES SP708R LOW/HIGH 2.63V YES 4% NO SP708S LOW/HIGH 2.93V YES 4% NO SP708T LOW/HIGH 3.08V YES 4% NO Rev. 10-17-00 SP706 +3.0/ +3.3 Low Power Microprocessor Circuits 1 © Copyright 2000 Sipex Corporation ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Continuous Power Dissipation Plastic DIP (derate 9.09mW/OC above +70OC)..................727mW SO (derate 5.88mW/OC above +70OC)..................471mW Mini SO (derate 4.10mW/OC above +70OC)..................330mW Storage Temperature Range.............-65˚C to +160˚C Lead Temperature (solding 10 sec)................+300˚C Terminal Voltage (with respect to GND): VCC........................................................-0.3V to +6.0V All Other Inputs (Note 1)..............-0.3V to (VCC +3.0V) Input Current: VCC.....................................................................20mA GND...................................................................20mA Output Current (all outputs)...............................20mA ESD Rating...........................................................2kV SPECIFICATIONS Vcc = 2.7V to 5.5V for SP70_P/R, VCC = 3.0 to 5.5V for SP70_S, VCC = 3.15V to 5.5V for SP70_T, TA= TMIN to TMAX to TMAX, unless otherwise noted, typical at 25°C. PARAMETER Operating Voltage Range, VCC Supply Current, ISUPPLY Reset Threshold Reset Threshold Hysteresis Reset Pulse Width, tRS RESET Output Voltage VOH VOL VOH VOL RESET Output Voltage VOH VOL VOH VOL Watchdog Timeout Period, tWD WDI Pulse Width, tWP WDI Input Threshold, VIL VIH VIL VIH WDI Input Current Rev. 10-17-00 MIN. 1.0 2.55 2.85 3.00 140 TYP. MAX. 5.5 UNITS V 25 2.63 2.93 3.08 20 200 40 2.70 3.00 3.15 µA V 280 mV ms 0.3 V 0.8xVCC VCC-1.5 0.4 VCC-0.6 0.3 V VCC-1.5 1.00 50 1.60 0.4 2.25 s ns 0.6 0.7xVCC V 0.8 3.5 -1 0.02 1 µA CONDITIONS MR=VCC or Floating, WDI Floating SP70_P/R SP70_S SP70_T Note 2 Note 2 VRST(MAX)