Maxim MAX6334UR23D1-T, MAX6334UR23D2-T, MAX6334UR23D3-T, MAX6334UR22D2-T, MAX6334UR22D1-T Datasheet
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General Description
The MAX6332/MAX6333/MAX6334 microprocessor (µP)
supervisory circuits monitor the power supplies in 1.8V
to 3.3V µP and digital systems. They increase circuit
reliability and reduce cost by eliminating external components and adjustments.
These devices perform a single function: they assert a
reset signal whenever the VCCsupply voltage declines
below a preset threshold, keeping it asserted for a preset timeout period after VCChas risen above the reset
threshold. The only difference among the three devices
is their output. The MAX6333 (push/pull) and MAX6334
(open-drain) have an active-low RESET output, while
the MAX6332 (push/pull) has an active-high RESET output. The MAX6332/MAX6333 are guaranteed to be in
the correct state for VCCdown to 0.7V. The MAX6334 is
guaranteed to be in the correct state for VCCdown to
1.0V.
The reset comparator in these ICs is designed to ignore
fast transients on VCC. Reset thresholds are factorytrimmable between 1.6V and 2.5V, in approximately
100mV increments. There are 15 standard versions
available (2,500 piece minimum-order quantity); contact the factory for availability of nonstandard versions
(10,000 piece minimum-order quantity). For space-critical applications, the MAX6332/MAX6333/MAX6334
come packaged in a 3-pin SOT23.
Applications
Pentium II™ Computers
Computers
Controllers
Intelligent Instruments
Critical µP/µC Power Monitoring
Portable/Battery-Powered Equipment
Automotive
Features
♦ Ultra-Low 0.7V Operating Supply Voltage
♦ Low 3.3µA Supply Current
♦ Precision Monitoring of 1.8V and 2.5V Power-
Supply Voltages
♦ Reset Thresholds Available from 1.6V to 2.5V,
in Approximately 100mV Increments
♦ Fully Specified over Temperature
♦ Three Power-On Reset Pulse Widths Available
(1ms min, 20ms min, 100ms min)
♦ Low Cost
♦ Three Available Output Structures: Push/Pull
RESET, Push/Pull RESET, Open-Drain RESET
♦ Guaranteed RESET/RESET Valid to V
CC
= 0.7V
(MAX6332/MAX6333)
♦ Power-Supply Transient Immunity
♦ No External Components
♦ 3-Pin SOT23 Package
♦ Pin-Compatible with MAX809/MAX810 and
MAX6326/MAX6327/MAX6328
MAX6332/MAX6333/MAX6334
3-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits
________________________________________________________________
Maxim Integrated Products
1
19-1411; Rev 0; 12/98
PART*
MAX6332UR__D_-T
MAX6333UR__D_-T
MAX6334UR__D_-T
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE PIN-PACKAGE
3 SOT23-3
3 SOT23-3
3 SOT23-3
Ordering Information
*
These devices are available in factory-set VCCreset thresholds from 1.6V to 2.5V, in approximately 0.1V increments.
Choose the desired reset threshold suffix from Table 1 and
insert it in the blanks following “UR” in the part number.
Factory-programmed reset timeout periods are also available.
Insert the number corresponding to the desired nominal reset
timeout period (1 = 1ms min, 2 = 20ms min, 3 = 100ms min) in
the blank following “D” in the part number. There are 15 standard versions with a required order increment of 2500 pieces.
Sample stock is generally held on the standard versions only
(see Selector Guide). Contact the factory for availability of nonstandard versions (required order increment is 10,000 pieces).
All devices available in tape-and-reel only.
Typical Operating Circuit and Pin Configuration appear
at end of data sheet.
Selector Guide appears at end of data sheet.
Pentium II is a trademark of Intel Corp.
Reset
asserted
MAX6332/MAX6333/MAX6334
3-Pin, Ultra-Low-Voltage, Low-Power
µP Reset Circuits
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= full range, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C and VCC= 3V, reset not asserted.)
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)
VCC......................................................................-0.3V to +6V
Push/Pull RESET, RESET .......................-0.3V to (V
CC
+ 0.3V)
Open-Drain RESET ..............................................-0.3V to +6V
Input Current (V
CC
).............................................................20mA
Output Current (RESET, RESET).........................................20mA
Rate of Rise, V
CC
............................................................100V/µs
Continuous Power Dissipation (T
A
= +70°C)
SOT23-3 (derate 4mW/°C above +70°C)....................320mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range V
CC
TA= 0°C to +85°C
MAX6332/MAX6333 0.7 5.5
MAX6334 1.0 5.5
TA = -40°C to +85°C
MAX6332/MAX6333 0.78 5.5
MAX6334 1.2 5.5
V
Supply Current I
CC
No load
V
CC
= 1.8V 3.0 6.0
V
CC
= 2.5V 3.3 7.0
µA
TA = +25°C
V
TH -
V
TH
V
TH +
1.8% 1.8%
TA = -40°C to +85°C
V
TH -
V
TH
V
TH +
3% 3%
Reset Threshold V
TH
MAX633_UR__D_-T,
Table 1
V
VCCFalling Reset Delay VCCfalling at 10V/ms 24 µs
MAX633_UR__D1-T 1 1.5 2
MAX633_UR__D2-T 20 30 40Reset Active Timeout Period
t
RP
MAX633_UR__D3-T 100 150 200
ms
RESET Output Low Voltage
(MAX6333/MAX6334)
V
OL
0.4
Reset
asserted
V
RESET Output High Voltage
(MAX6333)
V
OH
I
SOURCE
= 200µA, V
CC
≥ 1.8V 0.8V
CC
I
SOURCE
= 500µA, V
CC
≥ 2.7V 0.8V
CC
V
RESET Output Voltage
(MAX6332)
V
OH
Reset
asserted
I
SOURCE
= 1µA, V
CC
≥ 1.0V 0.8V
CC
I
SOURCE
= 200µA, V
CC
≥ 1.8V 0.8V
CC
V
V
OL
Reset not
asserted
I
SINK
= 500µA, V
CC
≥ 1.8V
I
SINK
= 1.2mA, V
CC
≥ 2.7V
0.3
V
0.3
Reset not
asserted
I
SINK
= 50µA, V
CC
≥ 1.0V
I
SINK
= 500µA, V
CC
≥ 1.8V 0.3
RESET Output Leakage
Current (MAX6334)
V
CC >VTH,
RESET deasserted
0.5
µA
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