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MAX807MCWE

Description
Supervisory Circuits Full-Featured P Supervisory Circuit with 1.5% Reset Accuracy
CategoryPower/power management    The power supply circuit   
File Size259KB,16 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX807MCWE Overview

Supervisory Circuits Full-Featured P Supervisory Circuit with 1.5% Reset Accuracy

MAX807MCWE Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerMaxim
Parts packaging codeSOIC
package instructionSOP-16
Contacts16
Reach Compliance Codenot_compliant
ECCN codeEAR99
Other featuresRESET THRESHOLD VOLTAGE IS 4.425V
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 codeR-PDSO-G16
JESD-609 codee0
length10.3 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP16,.4
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)245
power supply5 V
Certification statusNot Qualified
Maximum seat height2.65 mm
Maximum supply current (Isup)0.11 mA
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)4.35 V
Nominal supply voltage (Vsup)5 V
surface mountYES
technologyBICMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width7.5 mm
19-0433; Rev 4; 11/05
Full-Featured µP Supervisory Circuit with
±1.5% Reset Accuracy
General Description
The MAX807 microprocessor (µP) supervisory circuit
reduces the complexity and number of components
needed to monitor power-supply and battery-control func-
tions in µP systems. A 70µA supply current makes the
MAX807 ideal for use in portable equipment, while a 2ns
chip-enable propagation delay and 250mA output current
capability (20mA in battery-backup mode) make it suit-
able for larger, higher-performance equipment.
The MAX807 comes in 16-pin DIP, SO, and TSSOP pack-
ages, and provides the following functions:
• µP reset. The active-low RESET output is asserted dur-
ing power-up, power-down, and brownout conditions,
and is guaranteed to be in the correct state for V
CC
down to 1V.
• Active-high RESET output.
• Manual-reset input.
• Two-stage power-fail warning. A separate low-line
comparator compares V
CC
to a threshold 52mV above
the reset threshold. This low-line comparator is more
accurate than those in previous µP supervisors.
• Backup-battery switchover for CMOS RAM, real-time
clocks, µPs, or other low-power logic.
• Write protection of CMOS RAM or EEPROM.
• 2.275V threshold detector provides for power-fail
warning and low-battery detection, or monitors a
power supply other than +5V.
• BATT OK status flag indicates that the backup-battery
voltage is above +2.275V.
• Watchdog-fault output—asserted if the watchdog input
has not been toggled within a preset timeout period.
Features
Precision 4.675V (MAX807L), 4.425V (MAX807M),
or 4.575V (MAX807N) Voltage Monitoring
200ms Power-OK/Reset Time Delay
RESET and RESET Outputs
Independent Watchdog Timer
1µA Standby Current
Power Switching
250mA in V
CC
Mode
20mA in Battery-Backup Mode
On-Board Gating of Chip-Enable Signals;
2ns CE Gate Propagation Delay
MaxCap
®
and SuperCap
®
Compatible
Voltage Monitor for Power Fail
Backup-Battery Monitor
Guaranteed RESET Valid to V
CC
= 1V
±1.5% Low-Line Threshold Accuracy 52mV above
Reset Threshold
MAX807L/M/N
Pin Configuration
TOP VIEW
PFI 1
PFO 2
V
CC
3
WDI
4
16 OUT
15 BATT OK
14 BATT
Applications
Computers
Controllers
Intelligent Instruments
Critical µP Power Monitoring
Portable/Battery-Powered Equipment
MAX807
13 BATT ON
12 CE IN
11 CE OUT
10 WDO
9
RESET
GND 5
MR
LOW LINE
RESET
6
7
8
DIP/SO/TSSOP
Ordering Information and Typical Operating Circuit appear at end of data sheet.
SuperCap is a registered trademark of Baknor Industries. MaxCap is a registered trademark of Cesiwid, Inc.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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