G676/G677 Global Mixed-mode Technology Microprocessor Reset IC Features General Description Precision Monitoring of +3V, +3.3V, and +5V The G676/G677 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. Power-Supply Voltages Fully Specified Over Temperature Available in Two Output Configurations Push-Pull RESET Output (G676L) These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold or manual reset is triggered, and keeping it asserted for time delay determined by adjustable time delay generator (CD pin) after VCC has risen above the reset threshold or manual reset is released. Reset thresholds suitable for operation with a variety of supply voltages are available. Manual reset is generated after pull low MR pin lastingly over deglitch time delay set by capacitor connected in MRDLY pin. Open-Drain RESET Output (G677L) Adjustable Reset Delay Time Manual Reset Input with Adjustable Manual Re set Deglitch Time 14µA Supply Current Guaranteed Reset Valid to VCC = 1V Power Supply Transient Immunity 6 pin SOT-23-6 and ADFN1.5X1.5-6 Packages 2% Threshold Accuracy Applications The G677L has an open-drain output stage, while the G676 have push-pull outputs. The G677L’s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than VCC. 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 1V. Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable / Battery-Powered Equipment Automotive Low supply current makes the G676/G677 ideal for use in portable equipment. The G676/G677 are available in 6-pin SOT-23-6 and ADFN1.5X1.5-6 packages. Ordering Information ORDER NUMBER MARKING TEMP. RANGE PACKAGE (Green) G676LxxxTBU G677LxxxTBU 676xx 677xx 66 xx 67 xx -40°C ~ +105°C -40°C ~ +105°C SOT-23-6 SOT-23-6 -40°C ~ +105°C ADFN1.5X1.5-6 -40°C ~ +105°C ADFN1.5X1.5-6 G676LxxxA31U G677LxxxA31U * xxx specifies the threshold voltage. e.g. 263 denotes the 2.64V threshold voltage. TB: SOT-23-6 A3:ADFN1.5X1.5-6 1 : Bonding Code U: Tape & Reel Pin Configuration Typical Application Circuit VCC G676/G677 CD 1 6 MR MRDLY 1 VCC VCC MRDLY G676/G677 6 CMR VCC Rpull-up* G676/G677 RESET GND 5 2 RESET GND 2 5 RESET CD 3 4 MR CD MRDLY 3 4 VCC GND MR µP RESET INPUT GND CD ADFN1.5X1.5-6 SOT-23-6 *G677 ONLY ICC may increased at high TA, Therefore, can not connect Resistors to VCC to prevent Icc abnormal behavior at high TA. TEL: 886-3-5788833 http://www.gmt.com.tw Ver:1.0 Apr 17, 2012 1