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X5645

更新时间： 2024-01-06 22:39:28
品牌 Logo 应用领域
英特矽尔 - INTERSIL 监控可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数 文件大小 规格书
19页 312K
描述
CPU Supervisor with 64Kbit SPI EEPROM

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X5645 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：PLASTIC, DIP-8Reach Compliance Code：unknown
风险等级：5.75可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY MANAGEMENT CIRCUITJESD-30 代码：R-PDIP-T8
JESD-609代码：e0长度：10.03 mm
信道数量：1功能数量：1
端子数量：8最高工作温度：70 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装形状：RECTANGULAR
封装形式：IN-LINE认证状态：Not Qualified
座面最大高度：4.32 mm最大供电电压 (Vsup)：5.5 V
最小供电电压 (Vsup)：4.5 V标称供电电压 (Vsup)：5 V
表面贴装：NO温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：THROUGH-HOLE
端子节距：2.54 mm端子位置：DUAL
宽度：7.62 mmBase Number Matches：1

X5645 数据手册

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X5643, X5645  
®
(Replaces X25643, X25645)  
Data Sheet  
July 18, 2005  
FN8135.1  
DESCRIPTION  
CPU Supervisor with 64Kbit SPI EEPROM  
These devices combine four popular functions, Power-  
on Reset Control, Watchdog Timer, Supply Voltage  
Supervision, and Block Lock Protect Serial EEPROM  
Memory in one package. This combination lowers sys-  
tem cost, reduces board space requirements, and  
increases reliability.  
FEATURES  
• Selectable watchdog timer  
• Low V detection and reset assertion  
CC  
—Five standard reset threshold voltages  
—Re-program low V reset threshold voltage  
CC  
using special programming sequence  
Applying power to the device activates the power-on  
reset circuit which holds RESET/RESET active for a  
period of time. This allows the power supply and oscilla-  
tor to stabilize before the processor can execute code.  
—Reset signal valid to V = 1V  
CC  
• Determine watchdog or low voltage reset with a  
volatile flag bit  
• Long battery life with low power consumption  
—<50µA max standby current, watchdog on  
—<1µA max standby current, watchdog off  
—<400µA max active current during read  
• 64Kbits of EEPROM  
The Watchdog Timer provides an independent protection  
mechanism for microcontrollers. When the microcon-  
troller fails to restart a timer within a selectable time out  
interval, the device activates the RESET/RESET signal.  
The user selects the interval from three preset values.  
Once selected, the interval does not change, even after  
cycling the power.  
• Built-in inadvertent write protection  
—Power-up/power-down protection circuitry  
—Protect 0, 1/4, 1/2 or all of EEPROM array with  
™
Block Lock protection  
The device’s low V  
detection circuitry protects the  
CC  
—In circuit programmable ROM mode  
• 2MHz SPI interface modes (0,0 & 1,1)  
• Minimize EEPROM programming time  
—32-byte page write mode  
user’s system from low voltage conditions, resetting  
the system when V falls below the minimum V  
CC  
CC  
trip point. RESET/RESET is asserted until V returns  
CC  
to proper operating level and stabilizes. Five industry  
—Self-timed write cycle  
standard V  
thresholds are available, however,  
TRIP  
—5ms write cycle time (typical)  
• 2.7V to 5.5V and 4.5V to 5.5V power supply  
operation  
Intersil’s unique circuits allow the threshold to be repro-  
grammed to meet custom requirements or to fine-tune  
the threshold for applications requiring higher precision.  
• Available packages  
—8-lead PDIP, 14-lead SOIC  
BLOCK DIAGRAM  
Watchdog Transition  
Detector  
Watchdog  
Timer Reset  
WP  
Protect Logic  
RESET/RESET  
SI  
Data  
Register  
Status  
Register  
SO  
Command  
Decode &  
Control  
Reset &  
Watchdog  
Timebase  
X5643 = RESET  
X5645 = RESET  
SCK  
16Kbits  
16Kbits  
CS/WDI  
Logic  
VCC Threshold  
Reset logic  
32Kbits  
Power-on and  
Low Voltage  
Reset  
VCC  
+
-
Generation  
VTRIP  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc.  
Copyright Intersil Americas Inc. 2005. All Rights Reserved  
1
All other trademarks mentioned are the property of their respective owners.  
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