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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6836 Datasheet

Ultra-Low-Voltage SC70 Voltage Detectors and uP Reset Circuits

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MAX6832–MAX6840
Ultra-Low-Voltage SC70 Voltage Detectors
and µP Reset Circuits
General Description
The MAX6832–MAX6840 are microprocessor (µP)
supervisory circuits used to monitor low-voltage power
supplies in µP and digital systems. They provide excel-
lent circuit reliability and low cost by eliminating exter-
nal components and adjustments when used with
+1.2V to +1.8V powered circuits.
These devices assert a reset signal whenever the VCC
supply voltage declines below a preset threshold or
whenever manual reset (MR) is asserted. Reset remains
asserted for a fixed timeout delay after VCC has risen
above the reset threshold or when manual reset is
deasserted. Five different timeout periods are available:
70µs (voltage detector), 1.5ms, 30ms, 210ms, and 1.68s.
Reset thresholds suitable for operation with a variety of
supply voltages are available.
The MAX6832/MAX6835/MAX6838 have a push-pull
active-low reset output (RESET). The MAX6833/
MAX6836/MAX6839 have a push-pull active-high reset
output (RESET) and the MAX6834/MAX6837/MAX6840
have an open-drain active-low reset output (RESET). The
open-drain active-low reset output requires a pullup resis-
tor that can be connected to a voltage higher than VCC.
The MAX6835/MAX6836/MAX6837 feature a debounced
manual reset input (MR), while the MAX6838/MAX6839/
MAX6840 provide a RESET-IN input allowing the user to
externally adjust the reset threshold. The reset compara-
tor is designed to ignore fast transients on VCC.
Low supply current of 7.5µA makes the MAX6832–
MAX6840 ideal for use in portable equipment. These
devices are available in 3- and 4-pin SC70 packages.
Applications
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
Pin Configurations, Typical Operating Circuit, and Selector
Guide appear at end of data sheet.
Visit www.maximintegrated.com/products/patents for
product patent marking information.
Features
o Factory-Set Reset Threshold Voltages for
Nominal Supplies from 1.2V to 1.8V
o Low Power Consumption: 7.5µA (typ)
o Space-Saving 3- and 4-Pin SC70 Packages
o ±2.5% Reset Threshold Accuracy Over
Temperature
o Five Different Timeout Periods Available: 70µs
(voltage detector), 1.5ms, 30ms, 210ms, and 1.68s
o Three Reset Output Configurations
Push-Pull RESET
Push-Pull RESET
Open-Drain RESET
o Guaranteed Reset Valid to VCC =
0.55V—Active-Low
0.75V—Active-High
o Adjustable Threshold Reset-In Option
o Manual Reset Input Option
o Immune to Short Negative VCC Transients
o Pin Compatible with MAX803/MAX809/MAX810,
MAX6711/MAX6712/MAX6713, and
MAX6381–MAX6390 Series
Ordering Information
PART
MAX6832_XRD_-T
MAX6833_XRD_-T
MAX6834_XRD_-T
MAX6835_XSD_-T
MAX6836_XSD_-T
MAX6837_XSD_-T
MAX6838XSD_-T
MAX6839XSD_-T
MAX6840XSD_-T
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
3 SC70-3
3 SC70-3
3 SC70-3
4 SC70-4
4 SC70-4
4 SC70-4
4 SC70-4
4 SC70-4
4 SC70-4
Insert the desired suffix letter from the Threshold Suffix Guide
(MAX6832–MAX6837) and the Active Timeout Period Guide
tables into the blanks to complete the part number. Sample
stock is generally available on standard versions only (see
Standard Versions table). Standard versions require a minimum
order increment of 2.5k units. Nonstandard versions must be
ordered in 10k unit increments. Contact factory for availability.
All parts are offered in tape-and-reel only.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-2242; Rev 2; 12/05


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX6836 Datasheet

Ultra-Low-Voltage SC70 Voltage Detectors and uP Reset Circuits

No Preview Available !

MAX6832–MAX6840
Ultra-Low-Voltage SC70 Voltage Detectors
and µP Reset Circuits
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (with respect to GND)
VCC ........................................................................-0.3V to +6.0V
Open-Drain RESET, MR .......................................-0.3V to +6.0V
RESET-IN, Push-Pull RESET
and RESET ..............................................-0.3V to (VCC + 0.3V)
Input/Output Current (all pins) ............................................20mA
Continous Power Dissipation (TA = +70°C)
3-Pin SC70 (derate 2.9mW/°C above +70°C) ...............235mW
4-Pin SC70 (derate 3.1mW/°C above +70°C) ...............245mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°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 = +0.55V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP
TA = -40°C to +85°C
MAX6832/MAX6835/MAX6838
MAX6834/MAX6837/MAX6840
0.55
Supply Voltage Range
Supply Current
Reset Threshold
RESET-IN Threshold
RESET-IN Leakage Current
Reset Threshold Hysteresis
VCC or RESET-IN to Reset Delay
Reset Active Timeout Period
VCC
ICC
VTH
VRSTIN
IRSTIN
VHYS
tRP
TA = -40°C to +85°C
MAX6833/MAX6836/MAX6839
TA = 0°C to +85°C
MAX6833/MAX6836/MAX6839
VCC = 1.2V, no load, reset not asserted
VCC = 1.8V, no load, reset not asserted
VCC = 3.6V, no load, reset not asserted
W
V
I
H
G
F (Note 2)
1.1V VCC 3.3V, 0°C to +85°C
1.1V VCC 3.3V, -40°C to +85°C
VCC falling, step signal from
(VTH + 100mV) to (VTH - 100mV)
D0
D1
D2
D3
D4
0.85
0.75
1.620
1.530
1.350
1.275
1.080
1.020
-2.5%
-3.0%
-25
7.5
9
16
1.665
1.575
1.388
1.313
1.110
1.050
444
444
0.75
60
1
20
140
1120
0.07
1.5
30
210
1680
MAX
3.6
3.6
3.6
13
16
25
1.710
1.620
1.425
1.350
1.140
1.080
+2.5%
+3.0%
+25
2
40
280
2240
UNITS
V
µA
V
mV
nA
%VTH
µs
ms
2 Maxim Integrated


Part Number MAX6836
Description Ultra-Low-Voltage SC70 Voltage Detectors and uP Reset Circuits
Maker Maxim Integrated
Total Page 11 Pages
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