MAX807LEWE Maxim Integrated Products, MAX807LEWE Datasheet

MAX807LEWE

Manufacturer Part Number

MAX807LEWE

Description

SOP16

Manufacturer

Maxim Integrated Products

Datasheets

1.MAX807LEWE.pdf (16 pages)

2.MAX807LEWE.pdf (16 pages)

3.MAX807LEWE.pdf (16 pages)

Specifications of MAX807LEWE

Date_code

05+

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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-

• Active-high RESET output.

• Manual-reset input.

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

• Backup-battery switchover for CMOS RAM, real-time

• Write protection of CMOS RAM or EEPROM.

• 2.275V threshold detector provides for power-fail

• BATT OK status flag indicates that the backup-battery

• Watchdog-fault output—asserted if the watchdog input

19-0433; Rev 4; 11/05

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.

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.

ing power-up, power-down, and brownout conditions,

and is guaranteed to be in the correct state for V

down to 1V.

comparator compares V

the reset threshold. This low-line comparator is more

accurate than those in previous µP supervisors.

clocks, µPs, or other low-power logic.

warning and low-battery detection, or monitors a

power supply other than +5V.

voltage is above +2.275V.

has not been toggled within a preset timeout period.

Computers

Controllers

Intelligent Instruments

Critical µP Power Monitoring

Portable/Battery-Powered Equipment

Full-Featured µP Supervisory Circuit with

________________________________________________________________ Maxim Integrated Products

General Description

to a threshold 52mV above

Applications

♦ Precision 4.675V (MAX807L), 4.425V (MAX807M),

♦ 200ms Power-OK/Reset Time Delay

♦ RESET and RESET Outputs

♦ Independent Watchdog Timer

♦ 1µA Standby Current

♦ Power Switching

♦ On-Board Gating of Chip-Enable Signals;

♦ MaxCap

♦ Voltage Monitor for Power Fail

♦ Backup-Battery Monitor

♦ Guaranteed RESET Valid to V

♦ ±1.5% Low-Line Threshold Accuracy 52mV above

±1.5% Reset Accuracy

or 4.575V (MAX807N) Voltage Monitoring

2ns CE Gate Propagation Delay

Reset Threshold

TOP VIEW

250mA in V

20mA in Battery-Backup Mode

LOW LINE

and SuperCap

RESET

GND

WDI

PFO

PFI

Mode

DIP/SO/TSSOP

MAX807

Pin Configuration

Compatible

= 1V

OUT

CE IN

CE OUT

WDO

RESET

BATT

BATT OK

BATT ON

Features

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