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ASM802LESA PDF预览

ASM802LESA

更新时间: 2024-11-30 06:38:15
品牌 Logo 应用领域
PULSECORE 电池微处理器监控
页数 文件大小 规格书
15页 344K
描述
μP Power Supply Supervisor With Battery Backup Switch

ASM802LESA 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
包装说明:0.150 INCH, SOIC-8Reach Compliance Code:unknown
风险等级:5.76其他特性:RESET THRESHOLD VOLTAGE IS 4.65V
可调阈值:NO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:2
功能数量:1端子数量:8
最高工作温度:85 °C最低工作温度:-40 °C
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):NOT SPECIFIED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):1.1 V标称供电电压 (Vsup):5 V
表面贴装:YES温度等级:INDUSTRIAL
端子面层:TIN LEAD端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:3.91 mm
Base Number Matches:1

ASM802LESA 数据手册

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ASM690A/692A  
ASM802L/802M  
ASM805L  
April 2008  
rev 1.7  
µP Power Supply Supervisor With Battery Backup Switch  
General Description  
• Short circuit protection and thermal limiting  
The ASM690A / ASM692A / ASM802L / ASM802M /  
ASM805L offers complete single chip solutions for power  
supply monitoring and control battery functions in  
microprocessor systems. Each device implements four  
functions: Reset control, watchdog monitoring, battery-  
backup switching and powerfailure monitoring. In addition  
to microprocessor reset under power-up and power-down  
conditions, these devices provide battery-backup  
switching to maintain control in power loss and brown-out  
situations. Additional monitoring capabilities can provide  
an early warning of unregulated power supply loss before  
the voltage regulator drops out. The important features of  
these four functions are:  
• Small 8-pin SO and 8-pin PDIP packages  
• No external components  
• Specified over full temperature range  
Applications  
• Embedded control systems  
• Portable/Battery operated systems  
• Intelligent instruments  
• Wireless instruments  
• Wireless communication systems  
• PDAs and hand-held equipments  
• µP / µC power supply monitoring  
• Safety system  
• 1.6 second watchdog timer to keep microprocessor  
responsive  
Typical Operating Circuit  
• 4.40V or 4.65V VCC threshold for microprocessor reset  
at power-up and power-down  
SPDT (Single-pole, Double-throw) PMOS switch  
connects backup power to RAM if VCC fails  
• 1.25V threshold detector for power loss or general  
purpose voltage monitoring  
These features are pin-compatible with the industry  
standard power-supply supervisors. Short-circuit and  
thermal protection have also been added. The ASM690A  
/ ASM802L / ASM805L generate a reset pulse when the  
supply voltage drops below 4.65V and the ASM692A /  
ASM802M generate a reset below 4.40V. The ASM802L /  
ASM802M have power-fail accuracy to ± 2%. The  
ASM805L is the same as the ASM690A except that  
RESET is provided instead of RESET.  
Block Diagram  
Features  
• Two precision supply-voltage monitor options  
4.65V (ASM690A / ASM802L / ASM805L)  
4.40V (ASM692A / ASM802M )  
• Battery-backup power switch on-chip  
• Watchdog timer: 1.6 second timeout  
• Power failure / low battery detection  
PulseCore Semiconductor Corporation  
1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018  
www.pulsecoresemi.com  
Notice: The information in this document is subject to change without notice.  

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