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X4643S8-4.5A

更新时间： 2024-01-01 13:46:30
品牌 Logo 应用领域
英特矽尔 - INTERSIL 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
21页 330K
描述
CPU Supervidor with 64K EEPROM

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X4643S8-4.5A 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：SOIC
包装说明：PLASTIC, SOIC-8针数：8
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.76
可调阈值：YES模拟集成电路 - 其他类型：POWER SUPPLY MANAGEMENT CIRCUIT
JESD-30 代码：R-PDSO-G8JESD-609代码：e0
长度：4.9 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：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
认证状态：Not Qualified座面最大高度：1.75 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：YES
技术：CMOS温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
宽度：3.9 mmBase Number Matches：1

X4643S8-4.5A 数据手册

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X4643, X4645  
®
64K, 8K x 8 Bit  
Data Sheet  
March 29, 2005  
FN8123.0  
DESCRIPTION  
CPU Supervisor with 64K EEPROM  
The X4643/5 combines four popular functions, Power-  
on Reset Control, Watchdog Timer, Supply Voltage  
Supervision, and Serial EEPROM Memory in one pack-  
age. This combination lowers system cost, reduces  
board space requirements, and increases reliability.  
FEATURES  
• Selectable watchdog timer  
• Low V detection and reset assertion  
CC  
—Four standard reset threshold voltages  
—Adjust low V reset threshold voltage using  
CC  
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.  
special programming sequence  
—Reset signal valid to V = 1V  
CC  
• Low power CMOS  
—<20µA max standby current, watchdog on  
—<1µA standby current, watchdog off  
—3mA active current  
• 64Kbits of EEPROM  
—64-byte page write mode  
—Self-timed write cycle  
—5ms write cycle time (typical)  
• Built-in inadvertent write protection  
—Power-up/power-down protection circuitry  
• 400kHz 2-wire interface  
• 2.7V to 5.5V power supply operation  
• Available packages  
The Watchdog Timer provides an independent protec-  
tion mechanism for microcontrollers. When the micro-  
controller 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.  
The device’s low V  
detection circuitry protects the  
CC  
user’s system from low voltage conditions, resetting  
the system when V falls below the set minimum  
CC  
V
trip point. RESET/RESET is asserted until V  
CC  
CC  
—8-lead SOIC  
—8-lead TSSOP  
returns to proper operating level and stabilizes. Four  
industry standard V thresholds are available,  
TRIP  
however, Intersil’s unique circuits allow the threshold  
to be reprogrammed to meet custom requirements or  
to fine-tune the threshold for applications requiring  
higher precision.  
BLOCK DIAGRAM  
Watchdog Transition  
Detector  
Watchdog  
Timer Reset  
WP  
Protect Logic  
RESET (X4643/5)  
RESET (X4645)  
Data  
Register  
SDA  
Status  
Register  
EEPROM Array  
Command  
Reset &  
Watchdog  
Timebase  
SCL  
Decode &  
Control  
Logic  
S0  
S1  
VCC Threshold  
Reset Logic  
Power-on and  
Low Voltage  
Reset  
+
-
VCC  
VTRIP  
Generation  
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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