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MAX820SEPE+

更新时间： 2024-11-15 20:03:27
品牌 Logo 应用领域
美信 - MAXIM 光电二极管
页数 文件大小 规格书
16页 334K
描述
Power Supply Management Circuit, Fixed, 1 Channel, PDIP16, LEAD FREE, PLASTIC, DIP-16

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MAX820SEPE+ 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：DIP
包装说明：DIP, DIP16,.3针数：16
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.15
Base Number Matches：1

MAX820SEPE+ 数据手册

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19-0147; Rev. 4; 11/05  
Microprocessor and Nonvolatile  
Memory Supervisory Circuits  
General Description  
Features  
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  
• µP reset: Assertion of RESET and RESET outputs during  
power-up, power-down, and brownout conditions.  
RESET is guaranteed valid for VCC down to 1V.  
♦ 10ns (max) Chip-Enable Gate Propagation Delay  
♦ Voltage Monitor for Overvoltage Warning  
• Manual-reset input.  
• Two-stage power-fail warning: A separate low-line  
comparator compares VCC to 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)  
Ordering Information  
• Watchdog fault output: Assertion of WDO if the watchdog  
input is not toggled within a preset timeout  
period.  
PART**  
TEMP. RANGE  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
PIN-PACKAGE  
16 Plastic DIP  
16 Narrow SO  
Dice*  
MAX792_CPE  
MAX792_CSE  
MAX792_C/D  
• Pulsed watchdog output: Advance warning 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.  
A
**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.  
• 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 ( 2ꢀ).  
Applications  
Computers  
Controllers  
Intelligent Instruments  
Critical µP Power Monitoring  
SUFFIX  
RESET THRESHOLD (V)  
L
M
T
S
R
4.62  
4.37  
3.06  
2.91  
2.61  
Typical Operating Circuit  
V
CC  
0.1µF  
3
V
V
CC  
CC  
13  
14  
CE OUT  
4
5
RESET IN/INT  
µP  
RAM  
MAX792  
ADDRESS  
DECODER  
CE IN  
LLIN/  
REFOUT  
A0-A15  
6
OVO  
LOW LINE  
RESET  
10  
1
NMI  
7
8
OVI  
RESET  
9
MR  
SWT  
GND  
12  
GND  
________________________________________________________________ Maxim Integrated Products  
1
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.  
1234567...16

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