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________________General Description
Maxim’s MAX8211 and MAX8212 are CMOS micropower
voltage detectors that warn microprocessors (µPs) of
power failures. Each contains a comparator, a 1.5V
bandgap reference, and an open-drain n-channel output
driver. Two external resistors are used in conjunction with
the internal reference to set the trip voltage to the desired
level. A hysteresis output is also included, allowing the user
to apply positive feedback for noise-free output switching.
The MAX8211 provides a 7mA current-limited output sink
whenever the voltage applied to the threshold pin is less
than the 1.5V internal reference. In the MAX8212, a voltage
greater than 1.5V at the threshold pin turns the output
stage on (no current limit).
The CMOS MAX8211/MAX8212 are plug-in replacements
for the bipolar ICL8211/ICL8212 in applications where the
maximum supply voltage is less than 16.5V. They offer sev-
eral performance advantages, including reduced supply
current, a more tightly controlled bandgap reference, and
more available current from the hysteresis output.
________________________Applications
µP Voltage Monitoring
Undervoltage Detection
Overvoltage Detection
Battery-Backup Switching
Power-Supply Fault Monitoring
Low-Battery Detection
____________________________Features
o µP Power-Fail Warning
o Improved 2nd Source for ICL8211/ICL8212
o Low-Power CMOS Design
o 5µA Quiescent Current
o On-Board Hysteresis Output
o ±40mV Threshold Accuracy (±3.5%)
o 2.0V to 16.5V Supply-Voltage Range
o Define Output Current Limit (MAX8211)
o High Output Current Capability (MAX8212)
_______________Ordering Information
MAX8211/MAX8212
Microprocessor Voltage Monitors
with Programmable Voltage Detection
________________________________________________________________
Maxim Integrated Products
1
V+
HYST
THRESH
MAX8211
OUT
GND
V+
R3
R2
R1
LOGIC-SUPPLY UNDERVOLTAGE DETECTOR
(DETAILED CIRCUIT DIAGRAM—FIGURE 5)
µP
NMI
_________________Pin Configurations
TOP VIEW
V+
MAX8211
MAX8212
N.C.
N.C.
GND
8
7
6
5
2
3
4
N.C.
1
HYST
THRESH
OUT
DIP/SO
___________Typical Operating Circuit
19-0539; Rev 5; 9/08
Ordering Information continued on last page.
*
Contact factory for dice specifications.
**
Contact factory for availability and processing to MIL-STD-883.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Pin Configurations continued at end of data sheet.
PART TEMP RANGE
PIN -
PA C K A G E
MAX8211CPA -0°C to +70°C 8 Plastic DIP
MAX8211CSA -0°C to +70°C 8 SO
MAX8211CUA -0°C to +70°C 8 µMAX
MAX8211CTY -0°C to +70°C 8 TO-99
MAX8211EPA -40°C to +85°C 8 Plastic DIP
MAX8211ESA -40°C to +85°C 8 SO
MAX8211EJA -40°C to +85°C 8 CERDIP
MAX8211ETY -40°C to +85°C 8 TO-99
MAX8211MJA -55°C to +125°C 8 CERDIP**
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