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G698 Datasheet(PDF) 1 Page - Global Mixed-mode Technology Inc |
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G698 Datasheet(HTML) 1 Page - Global Mixed-mode Technology Inc |
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1 / 8 page  Ver: 1.3 Jun 03, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw 1 G698/G699 Global Mixed-mode Technology Inc. Microprocessor Reset IC Features Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages Fully Specified Over Temperature Available in Three Output Configurations Push-Pull RESET Output (G698L) Push-Pull RESET Output (G698H) Open-Drain RESET Output (G699L) Externally Programmable Time Delay Generator 14µA Supply Current Guaranteed Reset Valid to VCC = 0.8V Power Supply Transient Immunity 5 pin SOT23-5 Packages 2% Threshold Accuracy Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable / Battery-Powered Equipment Automotive General Description The G698/G699 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 pro- grammable 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 G699L has an open-drain output stage, while the G698 have push-pull outputs. The G699L’s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than VCC. The G698L have an active-low RESET output, while the G698H has an active-high RESET output. The reset com- parator 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 G698/G699 ideal for use in portable equipment. The G698/G699 are avail- able in 5-pin SOT23-5 packages. Ordering Information ORDER NUMBER TEMP. RANGE PACKAGE G698H(L)xxxT1U -40°C ~ +105°C SOT23-5 G699LxxxT1U -40°C ~ +105°C SOT23-5 Note:T1 : SOT23-5 U : Tape & Reel * xxx specifies the threshold voltage. e.g. 263 denotes the 2.63V threshold voltage. Pin Configuration Typical Application Circuit SOT23-5 G698/G699 5 1 2 RESET (RESET) 4 3 GND ()is for G698H *G699 ONLY RESET INPUT GND µP VCC RESET (RESET) GND G698/G699 VCC CD V CC C D R pull-up* CD VCC GND SOT23-5 G698/G699 5 1 2 RESET (RESET) 4 3 GND ()is for G698H *G699 ONLY RESET INPUT GND µP VCC RESET (RESET) GND G698/G699 VCC CD V CC C D R pull-up* CD VCC GND |
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