MAX820SESE+T

更新时间： 2024-09-28 13:11:03

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美信 - MAXIM		存储微处理器监控
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数据手册

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MAX820SESE+T 数据手册

19-0147; Rev. 2; 6/98

Mic ro p ro c e s s o r a n d No n -Vo la t ile

Me m o ry S u p e rvis o ry Circ u it s

79/MAX820

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

Fe a t u re s

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:

♦ 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

1) µP reset: Assertion of RESET and RESET outputs dur-

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

tions. RESET is guaranteed valid for V_CCdown to 1V.

♦ 10ns (max) Chip-Enable Gate Propagation Delay

♦ Voltage Monitor for Overvoltage Warning

2) Manual-reset input.

3) Two-stage power-fail warning: A separate low-line

comparator compares V_CCto a preset threshold

120mV above the reset threshold; the low-line and

reset thresholds can be programmed externally.

♦ ±2% Reset and Low-Line Threshold Accuracy

(MAX820, external programming mode)

Ord e rin g In fo rm a t io n

4) Watchdog fault output: Assertion of WDO if the watch-

dog input is not toggled within a preset timeout

period.

PART**

TEMP. RANGE

0°C to +70°C

PIN-PACKAGE

16 Plastic DIP

16 Narrow SO

Dice*

MAX792_CPE

MAX792_CSE

MAX792_C/D

5) Puls e d wa tc hd og outp ut: Ad va nc e wa rning of

impending WDO assertion from watchdog timeout

that causes hardware shutdown.

Ordering Information continued at end of data sheet.

* Dice are tested at T = +25°C, DC parameters only.

6) Write protection of CMOS RAM, EEPROM, or other

memory devices.

**These parts offer a choice of five different reset threshold volt-

ages. Select the letter corresponding to the desired nominal

reset threshold voltage and insert it into the blank to complete the

part number.

The MAX792 and MAX820 are identical, except the

MAX820 guarantees higher low-line and reset threshold

accuracy (±2%).

SUFFIX

RESET THRESHOLD (V)

Ap p lic a t io n s

Computers

Controllers

4.62

4.37

3.06

2.91

2.61

Intelligent Instruments

Critical µP Power Monitoring

Typ ic a l Op e ra t in g Circ u it

0.1µF

CE OUT

RESET IN/INT

µP

RAM

MAX792

ADDRESS

DECODER

CE IN

OVO

LLIN/

REFOUT

A0-A15

LOW LINE

RESET

NMI

OVI

RESET

SWT

GND

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

12 3 4 5 6 7...16

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与MAX820SESE+T相关器件

型号	品牌	获取价格	描述	数据表
MAX820SMJE	MAXIM	获取价格	Power Supply Supervisor
MAX820TC/D	MAXIM	获取价格	Power Supply Supervisor
MAX820TCPE	MAXIM	获取价格	Power Supply Supervisor
MAX820TCPE+	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDIP16, LEAD FREE, PLASTIC, DIP-16
MAX820TCSE	MAXIM	获取价格	Power Supply Supervisor
MAX820TEJE	MAXIM	获取价格	Power Supply Supervisor
MAX820TEPE	MAXIM	获取价格	Power Supply Supervisor
MAX820TESE	MAXIM	获取价格	Power Supply Supervisor
MAX820TESE+	MAXIM	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO16, 0.150 INCH, LEAD FREE, MS
MAX820TESE+T	MAXIM	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO16, 0.150 INCH, SOIC-16

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