Power Supply Monitor a with Reset ADM709 FEATURES FUNCTIONAL BLOCK DIAGRAM Precision Supply Voltage Monitor +5 V, +3.3 V, +3 V Power Supply Monitor ADM709 35 mA Quiescent Current V CC RESET 140 ms (min) Power-On Reset Pulse RESET GENERATOR V TH Low Cost 8-Pin DIP/SO Packages Upgrade for MAX709 GND APPLICATIONS Microprocessor Systems Computers V V Controllers CC CC Intelligent Instruments ADM709 P Critical mP Monitoring RESET RESET Automotive Systems GND GND Critical mP Power Monitoring GENERAL DESCRIPTION Typical Operating Circuit The ADM709 contains a power supply monitor which generates a system reset during power-up, power-down and brownout ORDERING GUIDE conditions. When V falls below the reset threshold, RESET CC goes low and holds the P in reset. On power-up the RESET Reset Temperature Package output is held low for 140 ms after V rises above the thresh- CC Model Threshold Range Option* old. The RESET output remains operational with V as low CC as 1 V. ADM709LAN 4.65 V 40C to +85C N-8 ADM709LAR 4.65 V 40C to +85C SO-8 Three supply-voltage threshold levels are available suitable for ADM709MAN 4.40 V 40C to +85C N-8 +5 V, +3.3 V and for +3 V supply monitoring. The actual reset ADM709MAR 4.40 V 40C to +85C SO-8 voltage threshold is given below. ADM709TAN 3.08 V 40C to +85C N-8 The ADM709 is available in 8-pin DIP and SOIC packages. ADM709TAR 3.08 V 40C to +85C SO-8 ADM709SAN 2.93 V 40C to +85C N-8 Table I. Reset Threshold ADM709SAR 2.93 V 40C to +85C SO-8 ADM709RAN 2.63 V 40C to +85C N-8 Suffix Voltage (V) ADM709RAR 2.63 V 40C to +85C SO-8 L 4.65 *N = Plastic DIP SO = SOIC. M 4.40 T 3.08 S 2.93 R 2.63 REV. 0 Information furnished by Analog Devices is believed to be accurate and Analog Devices, Inc., 1995 reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 617/329-4700 Fax: 617/326-8703(V = Full Operating Range, T = T to T unless otherwise noted) ADM709SPECIFICATIONS CC A MIN MAX Parameter Min Typ Max Units Test Conditions/Comments V Operating Voltage Range 1.0 5.5 V T = 0C to +70C CC A 1.2 5.5 V T = 40C to +85C A Supply Current 35 85 AV < 3.6 V, T = 0C to +70C CC A 35 110 AV < 3.6 V, T = 40C to +85C CC A 65 150 AV < 5.5 V, T = 0C to +70C CC A 65 200 AV < 5.5 V, T = 40C to +85C CC A Reset Threshold 4.5 4.65 4.75 V ADM709L 4.25 4.40 4.50 V ADM709M 3.00 3.08 3.15 V ADM709T 2.85 2.93 3.00 V ADM709S 2.55 2.63 2.70 V ADM709R V to RESET Delay 20 sV = Reset Threshold maxmin CC CC RESET Active Time-Out Period 140 280 380 ms V = Reset Threshold max, V Rising CC CC RESET Output Voltage 0.3 V ADM709R/S/T, I = 1.2 mA. V = Reset SINK CC Threshold min 0.4 V ADM709L/M, I = 3.2 mA. V = Reset SINK CC Threshold min 0.3 V I = 50 A. V 1.0 V SINK CC 0.4 V I = 100 A. V 1.2 V SINK CC 0.8 V V ADM709R/S/T, I = 500 A, V Reset CC SOURCE CC Threshold max V 1.5 V V ADM709L/M, I = 800 A, V Reset CC SOURCE CC Threshold max Specifications subject to change without notice. PIN FUNCTION DESCRIPTION ABSOLUTE MAXIMUM RATINGS* (T = +25C unless otherwise noted) A Mnemonic Pin No. Function V . 0.3 V to +6 V CC RESET Output . 0.3 V to V + 0.3 V CC NC 1, 4, 5, 6, 8 No Connect Pins. V Input Current 20 mA CC V 2 +5 V, +3.3 V, +3 V Power Supply RESET Output Current 20 mA CC Input. Power Dissipation, N-8 DIP 727 mW Thermal Impedance . 135C/W JA RESET 7 Logic Output. It remains low while Power Dissipation, SO-8 SOIC 470 mW V is below the reset threshold CC Thermal Impedance . 110C/W JA voltage and for 280 ms (typ) after Operating Temperature Range V rises above the threshold. CC Industrial ( A Version) . 40C to +85C Lead Temperature (Soldering, 10 secs) +300C GND 3 Ground, 0 V. Vapor Phase (60 secs) . +215C Infrared (15 secs) . +220C Storage Temperature Range . 65C to +150C ESD Rating .>5 kV PIN CONFIGURATION * Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional 1 8 operation of the device at these or any other conditions above those listed in the NC NC operational sections of this specification is not implied. Exposure to absolute V 2 7 ADM709 RESET CC maximum ratings for extended periods of time may affect device reliability. TOP VIEW 3 6 GND NC (Not to Scale) 4 5 NC NC NC = NO CONNECT 2 REV. 0