G691L438T21

Global Mixed-mode Technology Inc. G690/G691 Microprocessor Reset IC Features Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages General Description The G690/G691 are microprocessor (µP) supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components 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, keeping it asserted for at least 140ms after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The G691L has an open-drain output stage, while the G690 have push-pull outputs. The G691L’s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than VCC. The G690L have an active-low RESET output, while the G690H 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 1V. Low supply current makes the G690/G691 ideal for use in portable equipment. The G690/G691 are available in 3-pin SOT89 or SOT23 or SC70 packages. Fully Specified Over Temperature Available in Three Output Configurations Push-Pull RESET Output (G690L) Push-Pull RESET Output (G690H) Open-Drain RESET Output (G691L) 140ms min Power-On Reset Pulse Width 10µA Supply Current Guaranteed Reset Valid to VCC = +1V Power Supply Transient Immunity No External Components 3-Pin SOT89, SOT23 and SC70 Packages Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable / Battery-Powered Equipment Automotive Pin Configuration Typical Application VCC 3 VCC RPULL-UP* VCC G690/G691 RESET (RESET) 1 2 3 1 2 GND RESET RESET INPUT µP GND SOT 89 SOT23/SC70 *G691 ONLY Ver: 1.3 Oct 31, 2002 TEL: 886-3-5788833 http://www.gmt.com.tw 1 Global Mixed-mode Technology Inc. Ordering Information PART G690LxxxTxx G690HxxxTxx G691LxxxTxx TEMP. RANGE -40°C ~ +105°C -40°C ~ +105°C -40°C ~ +105°C G690/G691 OUTPUT TYPE Push-Pull Active Low Push-Pull Active High Open-Drain Order Number Identification G69XX XXX TX X Pin Option Package Type Threshold Voltage Option Part Number PART NUMBER G690L : Push-Pull Active Low Output G690H : Push-Pull Active High Output G691L : Open-Drain Output THRESHOLD VOLTAGE OPTION * xxx specifies the threshold voltage. e.g. 263 denotes the 2.63V threshold voltage. PACKAGE TYPE T2 : SOT 89 T7 : SOT 23 T9 : SC 70 PIN OPTION 1 1 : RESET 2 : RESET 3 : GND 4 : GND 5 : VCC 6 : VCC *RESET for G690H 2 GND VCC RESET 3 VCC GND VCC RESET RESET VCC GND RESET GND Ver: 1.3 Oct 31, 2002 TEL: 886-3-5788833 http://www.gmt.com.tw 2 Global Mixed-mode Technology Inc. Absolute Maximum Ratings Terminal Voltage (with respect to GND) VCC.……………………………..…….…….-0.3V to +6.0V 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 G690/G691 Continuous Power Dissipation (TA = +70°C) 3-Pin SOT89……………………………………….500mW 3-Pin SOT23 (derate 4mW/°C above +70°C)….320mW 3-Pin SC70 (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 permanent 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) ICC SYMBOL TA = 0°C +70°C TA = -40°C +105°C CONDITION MIN 1.0 1.2 TYP MAX UNITS 5.5 5.5 30 23 4.70 4.75 4.86 4.45 4.50 4.56 4.06 4.10 4.20 3.11 3.15 3.23 2.96 3.00 3.08 2.66 2.70 2.76 V µA TA = -40°C +105°C VCC