MAX807L

更新时间： 2025-08-09 22:35:07

品牌	Logo	应用领域
美信 - MAXIM		监控
页数	文件大小	规格书
16页	118K
描述
Full-Featured レP Supervisory Circuit with 【1.5eset Accuracy

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数据手册

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MAX807L 数据手册

19-0433; Rev 0; 9/95

Fu ll-Fe a t u re d µP S u p e rvis o ry Circ u it w it h

±1 .5 % Re s e t Ac c u ra c y

AX807LM/N

_______________Ge n e ra l De s c rip t io n

____________________________Fe a t u re s

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.

♦ Precision 4.675V (MAX807L) or 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

The MAX807 comes in 16-pin DIP and SO packages, and

provides the following functions:

♦ Power Switching:

1) µP reset. The active-low RESET output is asserted dur-

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

250mA in V Mode

20mA in Battery-Backup Mode

and is guaranteed to be in the correct state for V

♦ On-Board Gating of Chip-Enable Signals:

down to 1V.

2ns CE Gate Propagation Delay

2) Active-high RESET output.

3) Manual-reset input.

♦ MaxCap™ and SuperCap™ Compatible

♦ Voltage Monitor for Power-Fail

♦ Backup-Battery Monitor

4) 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.

♦ Guaranteed RESET Valid to V = 1V

5) Backup-battery switchover for CMOS RAM, real-time

clocks, µPs, or other low-power logic.

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

Reset Threshold

6) Write protection of CMOS RAM or EEPROM.

7) 2.275V threshold detector—provides for power-fail

warning and low-battery detection, or monitors a

power supply other than +5V.

__________________P in Co n fig u ra t io n

8) BATT OK status flag indicates that the backup-battery

voltage is above 2.275V.

9) Watchdog-fault output—asserted if the watchdog input

has not been toggled within a preset timeout period.

TOP VIEW

________________________Ap p lic a t io n s

PFI

OUT

Computers

BATT OK

BATT

PFO

Controllers

Intelligent Instruments

Critical µP Power Monitoring

Portable/Battery-Powered Equipment

WDI

GND

MAX807

BATT ON

CE IN

CE OUT

LOW LINE

RESET

10 WDO

RESET

DIP/SO

Ordering Information and Typical Operating Circuit appear at end of data sheet.

SuperCap is a trademark of Baknor Industries. MaxCap is a trademark of The Carborundum Corp.

________________________________________________________________ Maxim Integrated Products

Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .

12 3 4 5 6 7...16

中文翻译

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与MAX807L相关器件

型号	品牌	获取价格	描述	数据表
MAX807LCPE	MAXIM	获取价格	Power Supply Supervisor
MAX807LCPE	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP16, PLASTIC, DIP-16
MAX807LCPE+	MAXIM	获取价格	暂无描述
MAX807LCSE	MAXIM	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, PDSO16, 0.300 INCH, SOP-16
MAX807LCUE	MAXIM	获取价格	Full-Featured uP Supervisory Circuit with +/-1.5% Reset Accuracy
MAX807LCUE+T	MAXIM	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, BICMOS, PDSO16, TSSOP-16
MAX807LCWE	MAXIM	获取价格	Full-Featured uP Supervisory Circuit with +/-1.5% Reset Accuracy
MAX807LCWE	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16, SOP-16
MAX807LCWE+	MAXIM	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, BICMOS, PDSO16, LEAD FREE, SOP-16
MAX807LEPE	MAXIM	获取价格	Full-Featured uP Supervisory Circuit with +/-1.5% Reset Accuracy

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