MAX807L datasheet, PDF - EEWORLD Datasheet

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MAX807L: Description1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16; Categorysemiconductor Analog mixed-signal IC; File Size185KB，16 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html

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MAX807L Overview

1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16

MAX807L Parametric

Parameter Name	Attribute value
Number of functions	1
Number of terminals	16
Maximum operating temperature	70 Cel
Minimum operating temperature	0.0 Cel
Maximum supply/operating voltage	5.5 V
Minimum supply/operating voltage	4.6 V
Rated supply voltage	5 V
Processing package description	SOP-16
state	ACTIVE
Craftsmanship	BICMOS
packaging shape	RECTANGULAR
Package Size	SMALL OUTLINE
surface mount	Yes
Terminal form	GULL WING
Terminal spacing	1.27 mm
terminal coating	TIN LEAD
Terminal location	DUAL
Packaging Materials	PLASTIC/EPOXY
Temperature level	COMMERCIAL
Number of channels	1
Analog IC other types	POWER SUPPLY MANAGEMENT CKT

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19-0433; Rev 3; 4/03

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

down to 1V.

• Active-high RESET output.

• Manual-reset input.

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

comparator compares V

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

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

= 1V

±1.5% Low-Line Threshold Accuracy 52mV above

Reset Threshold

MAX807L/M/N

Pin Configuration

TOP VIEW

PFI 1

16 OUT

15 BATT OK

14 BATT

Applications

Computers

Controllers

Intelligent Instruments

Critical µP Power Monitoring

Portable/Battery-Powered Equipment

PFO 2

WDI

MAX807

13 BATT ON

12 CE IN

11 CE OUT

10 WDO

RESET

GND 5

LOW LINE

RESET

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

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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