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MAX6834HXRD3+T

P1-P3P4-P6P7-P9P10-P11
19-2242; Rev 2; 12/05
MAX6832–MAX6840
Ultra-Low-Voltage SC70 Voltage Detectors
and µP Reset Circuits
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
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 V
CC
supply voltage declines below a preset threshold or
whenever manual reset (MR) is asserted. Reset remains
asserted for a fixed timeout delay after V
CC
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 V
CC
.
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 V
CC
.
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
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 V
CC
=
0.55V—Active-Low
0.75V—Active-High
o Adjustable Threshold Reset-In Option
o Manual Reset Input Option
o Immune to Short Negative V
CC
Transients
o Pin Compatible with MAX803/MAX809/MAX810,
MAX6711/MAX6712/MAX6713, and
MAX6381–MAX6390 Series
Ordering Information
Pin Configurations, Typical Operating Circuit, and Selector
Guide appear at end of data sheet.
PART TEMP RANGE PIN-PACKAGE
MAX6832_XRD_-T -40°C to +85°C 3 SC70-3
MAX6833_XRD_-T -40°C to +85°C 3 SC70-3
MAX6834_XRD_-T -40°C to +85°C 3 SC70-3
MAX6835_XSD_-T -40°C to +85°C 4 SC70-4
MAX6836_XSD_-T -40°C to +85°C 4 SC70-4
MAX6837_XSD_-T -40°C to +85°C 4 SC70-4
MAX6838XSD_-T -40°C to +85°C 4 SC70-4
MAX6839XSD_-T -40°C to +85°C 4 SC70-4
MAX6840XSD_-T -40°C to +85°C 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.
Visit www.maximintegrated.com/products/patents
for
product patent marking information.
MAX6832–MAX6840
Ultra-Low-Voltage SC70 Voltage Detectors
and µP Reset Circuits
2
Maxim Integrated
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +0.55V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
Terminal Voltage (with respect to GND)
V
CC
........................................................................-0.3V to +6.0V
Open-Drain RESET, MR .......................................-0.3V to +6.0V
RESET-IN, Push-Pull RESET
and RESET ..............................................-0.3V to (V
CC
+ 0.3V)
Input/Output Current (all pins) ............................................20mA
Continous Power Dissipation (T
A
= +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
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
T
A
= -40°C to +85°C
MAX6832/MAX6835/MAX6838
MAX6834/MAX6837/MAX6840
0.55 3.6
T
A
= -40°C to +85°C
MAX6833/MAX6836/MAX6839
0.85 3.6
Supply Voltage Range V
CC
T
A
= 0°C to +85°C
MAX6833/MAX6836/MAX6839
0.75 3.6
V
V
CC
= 1.2V, no load, reset not asserted 7.5 13
V
CC
= 1.8V, no load, reset not asserted 9 16
Supply Current I
CC
V
CC
= 3.6V, no load, reset not asserted 16 25
µA
W 1.620 1.665 1.710
V 1.530 1.575 1.620
I 1.350 1.388 1.425
H 1.275 1.313 1.350
G 1.080 1.110 1.140
Reset Threshold V
TH
F (Note 2) 1.020 1.050 1.080
V
1.1V ≤ V
CC
≤ 3.3V, 0°C to +85°C -2.5% 444 +2.5%
RESET-IN Threshold V
RSTIN
1.1V ≤ V
CC
≤ 3.3V, -40°C to +85°C -3.0% 444 +3.0%
mV
RESET-IN Leakage Current I
RSTIN
-25 +25 nA
Reset Threshold Hysteresis V
HYS
0.75 %V
TH
V
CC
or RESET-IN to Reset Delay
V
CC
falling, step signal from
(V
TH
+ 100mV) to (V
TH
- 100mV)
60 µs
D0 0.07
D1 1 1.5 2
D2 20 30 40
D3 140 210 280
Reset Active Timeout Period t
RP
D4 1120 1680 2240
ms
MAX6832–MAX6840
Ultra-Low-Voltage SC70 Voltage Detectors
and µP Reset Circuits
3
Maxim Integrated
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +0.55V to +3.6V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Propagation Delay (D0 only) t
P
V
CC
rising, step signal
from (V
TH
- 100mV) to (V
TH
+ 100mV)
70 µs
Startup Time (D0 only) V
CC
rising from 0 to 1.1V (t
R
< 1µs) 150 µs
V
IL
0.3 x V
CC
MR Input Voltage
V
IH
0.7 x V
CC
V
MR Minimum Input Pulse Width MR driven from V
CC
to 0 2 µs
MR Glitch Rejection MR driven from V
CC
to 0 100 ns
MR to Reset Delay MR driven from V
CC
to 0 500 ns
MR Pullup Resistance To V
CC
14 20 26 kΩ
V
CC
≥ 0.55V, I
SINK
=15µA, reset asserted 0.15
V
CC
≥ 1.0V, I
SINK
= 80µA, reset asserted 0.15
Open-Drain RESET Output
Voltage
V
OL
V
CC
≥ 1.5V, I
SINK
= 200µA, reset asserted 0.2
V
Open-Drain RESET Output
Leakage Current
I
LKG
V
CC
> V
TH,
reset not asserted 1.0 µA
V
CC
≥ 0.55V, I
SINK
= 15µA, reset asserted 0.2 x V
CC
V
CC
≥ 1.0V, I
SINK
= 80µA, reset asserted 0.2 x V
CC
V
OL
V
CC
≥ 1.5V, I
SINK
= 200µA, reset asserted 0.2 x V
CC
V
CC
≥ 1.1V, I
SOURCE
= 50µA, reset not
asserted
0.8 x V
CC
Push-Pull RESET Output
Voltage
V
OH
V
CC
≥ 1.5V, I
SOURCE
= 150µA, reset asserted 0.8 x V
CC
V
V
CC
≥ 0.75V, I
SOURCE
= 10µA, reset asserted
(Note 2)
0.8 x V
CC
V
CC
≥ 0.85V, I
SOURCE
= 10µA, reset asserted 0.8 x V
CC
V
CC
≥ 1.0V, I
SOURCE
= 50µA, reset asserted 0.8 x V
CC
V
OH
V
CC
≥ 1.5V, I
SOURCE
= 150µA, reset asserted 0.8 x V
CC
V
CC
≥ 1.1V, I
SINK
= 80µA, reset not asserted 0.2 x V
CC
Push-Pull RESET Output
Voltage
V
OL
V
CC
≥ 1.5V, I
SINK
= 200µA, reset not asserted 0.2 x V
CC
V
Note 1: 100% production tested at +25°C. Over temperature limits are guaranteed by design.
Note 2: Temperature range is from 0°C to +85°C.
P1-P3P4-P6P7-P9P10-P11

MAX6834HXRD3+T

Mfr. #:
Buy MAX6834HXRD3+T
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits Single uPower Reset Circuit
Lifecycle:
New from this manufacturer.
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