G696

Global Mixed-mode Technology Inc. G696/G697 Microprocessor Reset IC Features Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages General Description The G696/G697 are microprocessor (µP) supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost and adjustments when used with +5V, +3.3V, +3.0V- powered circuits. These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, with hysteresis keeping it asserted for time delay determined by externally programable time delay generator. after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The G697L has an open-drain output stage, while the G696 have push-pull outputs. The G697L’s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than VCC. The G696L have an active-low RESET output, while the G696H has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 0.8V. Low supply current makes the G696/G697 ideal for use in portable equipment. The G696/G697 are available in 5-pin SOT23-5 packages. Fully Specified Over Temperature Available in Three Output Configurations Push-Pull RESET Output (G696L) Push-Pull RESET Output (G696H) Open-Drain RESET Output (G697L) Externally Programmable Time Delay Generator 6µA Supply Current Guaranteed Reset Valid to VCC = 0.8V Power Supply Transient Immunity 5 pin SOT23-5 Packages Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable / Battery-Powered Equipment Automotive Ordering Information PART TEMP. RANGE PIN-PACKAGE SOT23-5 SOT23-5 G696H(L)xxxT1 -40°C ~ +105°C G697LxxxT1 -40°C ~ +105°C * xxx specifies the threshold voltage. e.g. 263 denotes the 2.63V threshold voltage. Pin Configuration Typical Operating Circuit V CC RESET(RESET) 1 5 CD V CC Rpull-up* V CC V CC 2 G696/G697 G696/G697 CD RESET (RESET) GND CD µP RESET INPUT GND GND 3 4 SOT23-5 N.C. ()is for G696H *G697 ONLY Ver: 1.1 Jul 26, 2002 TEL: 886-3-5788833 http://www.gmt.com.tw 1 Global Mixed-mode Technology Inc. Absolute Maximum Ratings Terminal Voltage (with respect to GND) VCC.……………………………..…….…….-0.3V to +6.0V Delay Capacitor Pin Voltage, VCD…..-0.3 to (VCC +0.3V) RESET, RESET (push-pull)....…....-0.3V to (VCC + 0.3V) RESET (open drain)...…......…................-0.3V to +6.0V Input Current, VCC ............................…..…............20mA Output Current, RESET, RESET ......…...............20mA G696/G697 Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23-5 (derate 2.17mW/°C above +70°C).174mW Operating Temperature Range …...…..-40°C to +105°C Storage Temperature Range..….…......-65°C to +150°C Lead Temperature (soldering, 10s)...…...….…...+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause p’ermanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (VCC = full range, TA = -40°C to +105°C, unless otherwise noted. Typical values are at TA = +25°C, VCC = 5V for 463/438/400 versions, VCC= 3.3V for 308/293 versions, and VCC = 3V for 263 version.) (Note 1) PARAMETER VCC Range Supply Current (SOT23-5) ICC SYMBOL CONDITION TA = 0°C +70°C TA = -40°C +105°C VCCVTH to outp ut chang e ( ms) 100 V TH 10 Delay between VCC