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Maxim > Products > Automotive > MAX690A, MAX692A, MAX802L, ...
Maxim > Products > Military and Aerospace > MAX690A, MAX692A, MAX802L, ...
Maxim > Products > Supervisors, Voltage Monitors, Sequencers > MAX690A, MAX692A, MAX802L, ...
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MAX690A, MAX692A, MAX802L, MAX802M, MAX805L
Microprocessor Supervisory Circuits
Industry-Standard, Full-Function uP Supervisor
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Status
Active: In Production.
Description
The MAX690A/MAX692A/MAX802L/MAX802M/MAX805L
reduce the complexity and number of components
required for power-supply monitoring and battery-control
functions in microprocessor (µP) systems. They significantly
improve system reliability and accuracy compared
to separate ICs or discrete components.
These parts provide four functions:
1) A reset output during power-up, power-down, and
brownout conditions.
2) Battery-backup switching for CMOS RAM, CMOS
µP, or other low-power logic.
3) A reset pulse if the optional watchdog timer has not
been toggled within 1.6sec.
4) A 1.25V threshold detector for power-fail warning or
low-battery detection, or to monitor a power supply
other than +5V.
The parts differ in their reset-voltage threshold levels
and reset outputs. The MAX690A/MAX802L/MAX805L
generate a reset pulse when the supply voltage drops
below 4.65V, and the MAX692A/MAX802M generate a
reset below 4.40V. The MAX802L/MAX802M guarantee
power-fail accuracies to ±2%. The MAX805L is the
same as the MAX690A except that RESET is provided
instead of active-low RESET.
All parts are available in 8-pin DIP and SO packages.
The MAX690A/MAX802L are pin compatible with the
MAX690 and MAX694. The MAX692A/MAX802M are
pin compatible with the MAX692.
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Data Sheet
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Key Features
- Precision Supply-Voltage Monitor:
- 4.65V for MAX690A/MAX802L/MAX805L
- 4.40V for MAX692A/MAX802M
- Reset Time Delay -200ms
- Watchdog Timer -1.6sec Timeout
- Battery-Backup Power Switching
- 200µA Quiescent Supply Current
- 50nA Quiescent Supply Current in Battery-Backup Mode
- Voltage Monitor for Power-Fail or Low-Battery Warning
- Power-Fail Accuracy Guaranteed to ±2% (MAX802L/M)
- Guaranteed RESET-bar Assertion to VCC = 1V
- 8-Pin SO and DIP Packages
- Underwriters Laboratories (UL) Recognized
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Applications/Uses
- Automotive Electronics
- Battery-Powered Computers/Controllers
- Critical µP Monitoring
- Intelligent Instruments
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Key Specifications:
| Battery Backup Circuits |
| Part Number |
Reset Thresh.
(V) |
Reset Out |
ICC
(µA) |
Features |
Industry Qualified |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max |
max w/pins |
See Notes |
| MAX690A |
4.5 to 5.0 |
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350 |
| Adjustable Reset Input | | Power Fail Comparator | | Watchdog |
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| Automotive - General | | MIL-STD-883B |
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| -55 to +125 | | -40 to +85 | | 0 to +70 |
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30.9 |
$3.33 @1k |
| MAX692A |
4.0 to 4.5 |
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| Automotive - General | | MIL-STD-883B |
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| -55 to +125 | | -40 to +85 | | 0 to +70 |
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79.7 |
$3.33 @1k |
| MAX802L |
4.5 to 5.0 |
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- |
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79.7 |
$3.66 @1k |
| MAX802M |
4.0 to 4.5 |
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- |
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30.9 |
$3.66 @1k |
| MAX805L |
4.5 to 5.0 |
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| Automotive - General | | MIL-STD-883B |
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| -55 to +125 | | -40 to +85 | | 0 to +70 |
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82.6 |
$3.32 @1k |
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See All Battery Backup Circuits (86)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
Notes and Comments
Power-fail accuracy guaranteed to ±2% (MAX802L/M)
Didn't Find What You Need?
Information Index
Document Ref.: 19-4333
Rev 4;
2006-06-22
This page last modified: 2007-07-17
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