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Part Number: G691
Description: The G690/G691 are microprocessor (µP) supervisory circuits used to monitor the power suppl...
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G691
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DataSheet
General Description
G691 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- pow- ered 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 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 1V.
Low supply current makes the G690/G691 ideal for use in portable equipment. The G690/G691 are avail- able in 3-pin SOT89 or SOT23 or SC70 packages.
G691 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
Continuous Power Dissipation (TA = +70)
3-Pin SOT89............................................500mW
3-Pin SOT23 (derate 4mW/ above +70)..........................320mW
3-Pin SC70 (derate 2.17mW/ above +70).......................174mW
Operating Temperature Range...................................40 to +105
Storage Temperature Range.....................................-65 to +150
Lead Temperature (soldering, 10s) ........................................+300
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress rat-ings 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.
G691 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 (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
G691 Typical Application
·Computers
·Controllers
·Intelligent Instruments
·Critical µP and µC Power Monitoring
·Portable / Battery-Powered Equipment
·Automotive
·Controllers
·Intelligent Instruments
·Critical µP and µC Power Monitoring
·Portable / Battery-Powered Equipment
·Automotive
G691 Connection Diagram
G691L
PDF/DataSheet Download
- Datasheet: G691L
- File Size: 224277 KB
- Manufacturer: GMT [Global Mixed-mode Technology Inc]
- Click here to Download
- ·G690
- GMT [Global Mixed-mode Technology Inc]
- Microprocessor Reset IC
- 224277 KB
- ·G690H
- GMT [Global Mixed-mode Technology Inc]
- Microprocessor Reset IC
- 224277 KB
- ·G690H263T21
- GMT [Global Mixed-mode Technology Inc]
- Microprocessor Reset IC
- 224277 KB
- ·G690H263T22
- GMT [Global Mixed-mode Technology Inc]
- Microprocessor Reset IC
- 224277 KB
- ·G690H263T23
- GMT [Global Mixed-mode Technology Inc]
- Microprocessor Reset IC
- 224277 KB
- ·G690H263T26
- GMT [Global Mixed-mode Technology Inc]
- Microprocessor Reset IC
- 224277 KB
- ·G690H263T71
- GMT [Global Mixed-mode Technology Inc]
- Microprocessor Reset IC
- 224277 KB
- ·G690H263T72
- GMT [Global Mixed-mode Technology Inc]
- Microprocessor Reset IC
- 224277 KB
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