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MAX818LCUA-T

Description
Supervisory Circuits
CategoryPower/power management    The power supply circuit   
File Size273KB,16 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX818LCUA-T Overview

Supervisory Circuits

MAX818LCUA-T Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerMaxim
Parts packaging codeSOIC
package instructionTSSOP, TSSOP8,.19
Contacts8
Reach Compliance Codenot_compliant
ECCN codeEAR99
Other featuresRESET THRESHOLD VOLTAGE IS 4.65V
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeS-PDSO-G8
JESD-609 codee0
length3 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Encapsulate equivalent codeTSSOP8,.19
Package shapeSQUARE
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)245
power supply5 V
Certification statusNot Qualified
Maximum seat height1.1 mm
Maximum supply current (Isup)0.045 mA
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)
Nominal supply voltage (Vsup)4.75 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3 mm
19-0486; Rev 3; 12/05
+5V Microprocessor Supervisory Circuits
General Description
The MAX817/MAX818/MAX819 microprocessor (µP)
supervisory circuits simplify power-supply monitoring,
battery control, and chip-enable gating in µP systems
by reducing the number of components required.
These devices are designed for use in +5V-powered
systems. Low supply current (11µA typical) and small
package size make these devices ideal for portable
applications. The MAX817/MAX818/MAX819 are specif-
ically designed to ignore fast transients on V
CC
. Other
supervisory functions include active-low reset, backup-
battery switchover, watchdog input, battery freshness
seal, and chip-enable gating. The
Selector Guide
below
lists the specific functions available from each device.
These devices offer two pretrimmed reset threshold volt-
ages for ±5% or ±10% power supplies: 4.65V for the L
versions and 4.40V for the M versions. The MAX817/
MAX818/MAX819 are available in space-saving µMAX
packages, as well as 8-pin DIP/SO.
____________________________Features
Precision Supply-Voltage Monitor:
4.65V (MAX81_L)
4.40V (MAX81_M)
11µA Quiescent Supply Current
200ms Reset Time Delay
Watchdog Timer with 1.6sec Timeout
(MAX817/MAX818)
Battery-Backup Power Switching; Battery Voltage
Can Exceed V
CC
Battery Freshness Seal
On-Board, 3ns Gating of Chip-Enable Signals
(MAX818)
Uncommitted Voltage Monitor for Power-Fail or
Low-Battery Warning (MAX817/MAX819)
Manual Reset Input (MAX819)
MAX817L/M, MAX818L/M, MAX819L/M*
_____________________Selector Guide
FEATURE
Active-Low Reset
Backup-Battery Switchover
Power-Fail Comparator
Watchdog Input
Battery Freshness Seal
Manual Reset Input
Chip-Enable Gating
Pin-Package
MAX817
L/M
MAX818
L/M
MAX819
L/M
______________Ordering Information
PART
MAX817_CPA
MAX817_CSA
MAX817_CUA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
8 Plastic DIP
8 SO
8 µMAX
Ordering Information continued on last page.
These parts offer a choice of reset threshold voltage. From the
table below, select the suffix corresponding to the desired
threshold and insert it into the blank to complete the part number.
Devices are available in both leaded and lead-free packaging.
Specify lead free by adding the + symbol at the end of the part
number when ordering.
SUFFIX
L
M
RESET THRESHOLD (V)
4.65
4.40
8-DIP/SO/ 8-DIP/SO/ 8-DIP/SO/
µMAX
µMAX
µMAX
MAX703/
MAX704
Low-Power, Pin-
MAX690A/
Compatible Upgrades for: MAX692A
_________________Pin Configurations
________________________Applications
Battery-Powered Computers and Controllers
Embedded Controllers
Intelligent Instruments
Critical µP Monitoring
Portable Equipment
TOP VIEW
OUT
1
V
CC
2
GND
3
PFI
4
8
BATT
RESET
WDI
PFO
MAX817
7
6
5
Typical Operating Circuit appears at end of data sheet.
*P
DIP/SO/µMAX
Pin Configurations continued at end of data sheet.
________________________________________________________________
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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