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MAX820TCSE+

Description
supervisory circuits mpu & NV memory supervisor
CategoryPower/power management    The power supply circuit   
File Size337KB,16 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric View All

MAX820TCSE+ Overview

supervisory circuits mpu & NV memory supervisor

MAX820TCSE+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeSOIC
package instructionSOP, SOP16,.25
Contacts16
Reach Compliance Codecompli
ECCN codeEAR99
Factory Lead Time6 weeks
Other featuresRESET THRESHOLD VOLTAGE IS 3.06V; MANUAL RESET INPUT
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 codeR-PDSO-G16
JESD-609 codee3
length9.9 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,.25
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
power supply3/5 V
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply current (Isup)0.15 mA
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)2.75 V
Nominal supply voltage (Vsup)5 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3.9 mm
19-0147; Rev. 4; 11/05
Microprocessor and Nonvolatile
Memory Supervisory Circuits
General Description
The MAX792/MAX820 microprocessor (µP) supervisory
circuits provide the most functions for power-supply
and watchdog monitoring in systems without battery
backup. Built-in features include the following:
• µP reset: Assertion of RESET and
RESET
outputs during
power-up, power-down, and brownout conditions.
RESET
is guaranteed valid for V
CC
down to 1V.
• Manual-reset input.
• Two-stage power-fail warning: A separate low-line
comparator compares V
CC
to a preset threshold
120mV above the reset threshold; the low-line and
reset thresholds can be programmed externally.
• Watchdog fault output: Assertion of
WDO
if the watchdog
input is not toggled within a preset timeout
period.
• Pulsed watchdog output: Advance warning of
impending
WDO
assertion from watchdog timeout that
causes hardware shutdown.
• Write protection of CMOS RAM, EEPROM, or other
memory devices.
The MAX792 and MAX820 are identical, except the
MAX820 guarantees higher low-line and reset threshold
accuracy (±2%).
Features
Manual-Reset Input
200ms Power-OK / Reset Time Delay
Independent Watchdog Timer—Preset or Adjustable
On-Board Gating of Chip-Enable Signals
Memory Write-Cycle Completion
10ns (max) Chip-Enable Gate Propagation Delay
Voltage Monitor for Overvoltage Warning
±2% Reset and Low-Line Threshold Accuracy
(MAX820, external programming mode)
MAX792/MAX820
Ordering Information
PART**
MAX792_CPE
MAX792_CSE
MAX792_C/D
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
Dice*
Ordering Information continued at end of data sheet.
*
Dice are tested at T
A
= +25°C, DC parameters only.
**These
parts offer a choice of five different reset threshold voltages.
Select the letter corresponding to the desired nominal reset threshold
voltage and insert it into the blank to complete the part number.
Devices in PDIP, SO and µMAX packages are available in both lead-
ed and lead-free packaging. Specify lead free by adding the + sym-
bol at the end of the part number when ordering. Lead free not avail-
able for CERDIP package.
Applications
Computers
Controllers
Intelligent Instruments
Critical µP Power Monitoring
SUFFIX
L
M
T
S
R
RESET THRESHOLD (V)
4.62
4.37
3.06
2.91
2.61
Typical Operating Circuit
3
V
CC
4
CE OUT
RESET IN/INT
13
0.1µF
V
CC
V
CC
µP
MAX792
5
LLIN/
REFOUT
CE IN
OVO
LOW LINE
7
8
OVI
SWT
GND
12
RESET
MR
14
6
10
1
9
GND
NMI
RESET
ADDRESS
DECODER
RAM
A0-A15
________________________________________________________________
Maxim Integrated Products
1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
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