MAX820RESE-T datasheet, PDF - EEWORLD Datasheet

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MAX820RESE-T: DescriptionSupervisory Circuits; CategoryPower/power management The power supply circuit; File Size337KB，16 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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MAX820RESE-T Overview

Supervisory Circuits

MAX820RESE-T Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	Maxim
Parts packaging code	SOIC
package instruction	0.150 INCH, MS-012AC, SOIC-16
Contacts	16
Reach Compliance Code	not_compliant
ECCN code	EAR99
Other features	RESET THRESHOLD VOLTAGE IS 2.61V; MANUAL RESET INPUT
Adjustable threshold	NO
Analog Integrated Circuits - Other Types	POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 code	R-PDSO-G16
JESD-609 code	e0
length	9.9 mm
Number of channels	1
Number of functions	1
Number of terminals	16
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP16,.25
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	245
power supply	3/5 V
Certification status	Not Qualified
Maximum seat height	1.75 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 mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	3.9 mm

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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

down to 1V.

• Manual-reset input.

• Two-stage power-fail warning: A separate low-line

comparator compares V

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

PIN-PACKAGE

16 Plastic DIP

16 Narrow SO

Dice*

Ordering Information continued at end of data sheet.

Dice are tested at T

= +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

RESET THRESHOLD (V)

4.62

4.37

3.06

2.91

2.61

Typical Operating Circuit

CE OUT

RESET IN/INT

0.1µF

µP

MAX792

LLIN/

REFOUT

CE IN

OVO

LOW LINE

OVI

SWT

GND

RESET

GND

NMI

RESET

ADDRESS

DECODER

RAM

A0-A15

________________________________________________________________

Maxim Integrated Products

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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