SSPP880099 // SSPP881100 33 PPiinn MMiiccrroopprroocceessssoorr SSuuppeerrvviissoorr CCiirrccuuiitt February 2011 Rev. 2.0.0 GENERAL DESCRIPTION APPLICATIONS The SP809/SP810 are low power Portable Electronic Devices microprocessor ( P) supervisory circuits used Electrical Power Meters to monitor power supplies in P and digital systems. Digital Still Cameras P Power Monitoring They provide applications with benefits of circuit reliability and low cost by eliminating external components. If the VCC supply FEATURES voltage falls below preset threshold then a reset signal is asserted for at least 140ms Ultra Low Supply Current 1A (typ) after V has risen above the reset threshold. CC Guaranteed Reset valid to V = 0.9V CC Both the SP809 and SP810 were designed with 140ms Power-On Reset Pulse Width a reset comparator to help identify invalid signals, which last less than 140ms. The only Internally Fixed Threshold difference between them is that they have an 2.3V, 2.6V, 2.9V, 3.1V, 4.4V, 4.6V active-low RESET output and active-high 1.5% Voltage Threshold Tolerance RESET output, respectively. Low supply current (1A) makes SP809/SP810 ideal for 3 Pin SOT-23 Package portable equipment. The devices are available in 3 pin SOT-23 package. Part Number Output Type Open Drain Active Low SP809N Push-Pull Low SP809 Push-Pull Active High SP810 TYPICAL APPLICATION DIAGRAM Fig. 1: SP809 / SP810 Application Diagram Exar Corporation www.exar.com 48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 Fax. +1 510 668-7001 SSPP880099 // SSPP881100 33 PPiinn MMiiccrroopprroocceessssoorr SSuuppeerrvviissoorr CCiirrccuuiitt ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of Input Voltage Range V ................................ 0.9V to 6V CC the device at these ratings or any other above those Junction Temperature Range ..................... -40C to 85C 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. V .......................................................... -0.3V to 6.5V CC RESET, RESET .................................... -0.3V to V +0.3V CC Output Current (RESET, RESET) ............................. 20mA Power Dissipation (T =70C) .............................. 320mW A Junction Temperature .......................................... 125C Storage Temperature .............................. -65C to 150C ELECTRICAL SPECIFICATIONS Specifications with standard type are for an Operating Temperature of T = 25C only limits applying over the full A Operating Temperature range are denoted by a . Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at T = 25C, and are provided for reference A purposes only. Unless otherwise indicated, T = 25C. A Parameter Min. Typ. Max. Units Conditions Operating Voltage Range V 6.0 V CC 0.9 Supply Current I 1.0 3.0 A V =V +0.1V CC CC TH 2.265 2.3 2.335 T =+25C A 2.254 2.346 T =-40C to 85C A 2.561 2.6 2.639 T =+25C A 2.652 T =-40C to 85C 2.548 A 2.9 2.944 T =+25C 2.857 A 2.842 2.958 T =-40C to 85C A Reset Threshold V V TH 3.054 3.1 3.147 T =+25C A 3.162 T =-40C to 85C 3.038 A 4.4 4.466 T =+25C 4.334 A 4.312 4.488 T =-40C to 85C A 4.531 4.6 4.669 T =+25C A 4.692 T =-40C to 85C 4.508 A V Reset Delay V 20 s V =V to (V + 0.1V), V =3.1V CC TRIP CC TH TH TH 230 560 T =+25C 140 A Reset Active Timeout Period T ms RP 100 1030 T =-40C to 85C A RESET Output Voltage V 0.8V V =V - 0.1V, I = 1.2mA OH CC CC TH SOURCE V RESET Output Voltage V 0.3 V =V + 0.1V, I = 1.2mA OL CC TH SINK RESET Output Voltage V V =V + 0.1V, I = 1.2mA OH 0.8V CC TH SOURCE CC V RESET Output Voltage V 0.3 V =V - 0.1V, I = 1.2mA OL CC TH SINK Note 1: RESET output is for SP809 RESET output is for SP810. 2011 Exar Corporation 2/8 Rev. 2.0.0