MAX6321HPUK46CY+T Maxim Integrated Products, MAX6321HPUK46CY+T Datasheet

IC UP SUPERVISOR CIRCUIT SOT23-5

MAX6321HPUK46CY+T

Manufacturer Part Number
MAX6321HPUK46CY+T
Description
IC UP SUPERVISOR CIRCUIT SOT23-5
Manufacturer
Maxim Integrated Products
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of MAX6321HPUK46CY+T

Number Of Voltages Monitored
1
Output
Open Drain, Push-Pull
Reset
Active High/Active Low
Reset Timeout
140 ms Minimum
Voltage - Threshold
4.63V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Monitored Voltage
1 V to 5.5 V
Undervoltage Threshold
4.561 V
Overvoltage Threshold
4.699 V
Output Type
Active High, Active Low, Open Drain, Push-Pull
Manual Reset
Not Resettable
Watchdog
Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
200 ms
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1 V
Supply Current (typ)
10 uA
Maximum Power Dissipation
571 mW
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX6316–MAX6322 family of microprocessor (µP)
supervisory circuits monitors power supplies and
microprocessor activity in digital systems. It offers sev-
eral combinations of push/pull, open-drain, and bidirec-
tional (such as Motorola 68HC11) reset outputs, along
with watchdog and manual reset features. The Selector
Guide below lists the specific functions available from
each device. These devices are specifically designed
to ignore fast negative transients on V
guaranteed valid for V
These devices are available in 26 factory-trimmed reset
threshold voltages (from 2.5V to 5V, in 100mV incre-
ments), featuring four minimum power-on reset timeout
periods (from 1ms to 1.12s), and four watchdog timeout
periods (from 6.3ms to 25.6s). Thirteen standard ver-
sions are available with an order increment requirement
of 2500 pieces (see Standard Versions table); contact
the factory for availability of other versions, which have
an order increment requirement of 10,000 pieces.
The MAX6316–MAX6322 are offered in a miniature
5-pin SOT23 package.
________________________Applications
19-0496; Rev 9; 6/10
________________General Description
* The MAX6318/MAX6319/MAX6321/MAX6322 feature two types of reset output on each device.
___________________________________________________________________Selector Guide
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.
MAX6316L
MAX6316M
MAX6317H
MAX6318LH
MAX6318MH
MAX6319LH
MAX6319MH
MAX6320P
MAX6321HP
MAX6322HP
PART
Portable Computers
Computers
Controllers
Intelligent Instruments
Portable/Battery-Powered Equipment
Embedded Control Systems
WATCHDOG
________________________________________________________________ Maxim Integrated Products
INPUT
CC
down to 1V.
5-Pin µP Supervisory Circuits with
MANUAL
RESET
INPUT
CC
. Resets are
Watchdog and Manual Reset
ACTIVE-LOW
PUSH/PULL
♦ ♦ Small 5-Pin SOT23 Package
♦ ♦ Available in 26 Reset Threshold Voltages
♦ ♦ Four Reset Timeout Periods
♦ ♦ Four Watchdog Timeout Periods
♦ ♦ Four Reset Output Stages
♦ ♦ Guaranteed Reset Valid to V
♦ ♦ Immune to Short Negative V
♦ ♦ Low Cost
♦ ♦ No External Components
_______________Ordering Information
Ordering Information continued at end of data sheet.
____________________________Features
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
Typical Operating Circuit and Pin Configurations appear at
end of data sheet.
MAX6316LUK____-T
MAX6316MUK____-T
MAX6317HUK____-T
MAX6318HUK____-T
MAX6318MHUK____-T
2.5V to 5V, in 100mV Increments
1ms, 20ms, 140ms, or 1.12s (min)
6.3ms, 102ms, 1.6s, or 25.6s (typ)
Active-High, Push/Pull
Active-Low, Push/Pull
Active-Low, Open-Drain
Active-Low, Bidirectional
ACTIVE-HIGH
PUSH/PULL
PART
RESET OUTPUTS*
BIDIRECTIONAL
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
ACTIVE-LOW
TEMP RANGE
CC
CC
Transients
= 1V
5 SOT23
5 SOT23
5 SOT23
5 SOT23
5 SOT23
PIN-PACKAGE
ACTIVE-LOW
OPEN-DRAIN
1

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MAX6321HPUK46CY+T Summary of contents

Page 1

... MAX6321HP MAX6322HP — * The MAX6318/MAX6319/MAX6321/MAX6322 feature two types of reset output on each device. ________________________________________________________________ Maxim Integrated Products 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. Watchdog and Manual Reset ____________________________Features ♦ ♦ Small 5-Pin SOT23 Package ♦ ...

Page 2

Supervisory Circuits with Watchdog and Manual Reset ABSOLUTE MAXIMUM RATINGS Voltage (with respect to GND) V ......................................................................-0.3V to +6V CC RESET (MAX6320/MAX6321/MAX6322 only)...... -0.3V to +6V All Other Pins.........................................-0. Input/Output Current, All Pins .............................................20mA Continuous Power ...

Page 3

Supervisory Circuits with ELECTRICAL CHARACTERISTICS (continued 2.5V to 5.5V -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYMBOL BIDIRECTIONAL RESET OUTPUT (MAX6316M/MAX6318MH/MAX6319MH) Transitional Flip-Flop Setup Time RESET Output ...

Page 4

Supervisory Circuits with Watchdog and Manual Reset __________________________________________Typical Operating Characteristics (T = +25°C, unless otherwise noted.) A MAX6316/MAX6317/MAX6318/MAX6320/MAX6321 SUPPLY CURRENT vs. TEMPERATURE ...

Page 5

Supervisory Circuits with ______________________________________________________________Pin Description PIN MAX6316L MAX6318LH MAX6316M MAX6317H MAX6318MH MAX6320P MAX6321HP 1 — — _______________________________________________________________________________________ Watchdog and Manual Reset MAX6319LH NAME MAX6319MH MAX6322HP RESET ...

Page 6

Supervisory Circuits with Watchdog and Manual Reset 52kΩ MR (ALL EXCEPT MAX6318/MAX6321) WDI (ALL EXCEPT MAX6319/MAX6322) Figure 1. Functional Diagram _______________Detailed Description A microprocessor’s (µP) reset input starts or restarts the µ ...

Page 7

Supervisory Circuits with Bidirectional Output The MAX6316M/MAX6318MH/MAX6319MH are designed to interface with µPs that have bidirectional reset pins, such as the Motorola 68HC11. Like an open-drain output, these ...

Page 8

Supervisory Circuits with Watchdog and Manual Reset LASER- TRIMMED RESISTORS 2μs ONE SHOT ACTIVE PULLUP ENABLE COMPARATOR Figure 4. MAX6316/MAX6318MH/MAX6319MH Bidirectional Reset Output Functional Diagram 8 _______________________________________________________________________________________ V CC MAX6318MH MAX6319MH VREF RESET GENERATOR WATCHDOG ON 2μs ONE ...

Page 9

Supervisory Circuits with P-channel transistor on-resistance quickly charges stray capacitance on the reset line, allowing RESET to transition from low to high within the required two elec- tronic-clock cycles, even with several devices on the reset line. This ...

Page 10

Supervisory Circuits with Watchdog and Manual Reset RST RESET t RP WDI Figure 7. Watchdog Timing Relationship Applications Information Watchdog Input Current The WDI input is internally driven through a buffer and series resistor from ...

Page 11

Supervisory Circuits with Figure 10 shows an example of a flow diagram where the I/O driving the watchdog input is set high at the beginning of the program, set low at the end of every subroutine or loop, ...

Page 12

Supervisory Circuits with Watchdog and Manual Reset Table 1. Factory-Trimmed Reset Thresholds PART MAX63___50_ _-T MAX63___49_ _-T MAX63___48_ _-T MAX63___47_ _-T MAX63___46_ _-T MAX63___45_ _-T MAX63___44_ _-T MAX63___43_ _-T MAX63___42_ _-T MAX63___41_ _-T MAX63___40_ _-T MAX63___39_ _-T MAX63___38_ ...

Page 13

Supervisory Circuits with Table 2. Standard Versions (continued) RESET PART THRESHOLD (V) MAX6320PUK46CY-T 4.63 MAX6321HPUK46CY-T 4.63 MAX6322HPUK46C-T 4.63 Note: Thirteen standard versions are available, with a required order increment of 2500 pieces. Sample stock is generally held on ...

Page 14

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2010 Maxim Integrated Products ...

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