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LMC6953CM PDF预览

LMC6953CM

更新时间: 2024-11-18 22:47:03
品牌 Logo 应用领域
美国国家半导体 - NSC 电源电路电源管理电路光电二极管监控PC
页数 文件大小 规格书
12页 222K
描述
PCI Local Bus Power Supervisor

LMC6953CM 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:SOP-8Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:3.58Is Samacsys:N
可调阈值:NO模拟集成电路 - 其他类型:POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码:R-PDSO-G8JESD-609代码:e0
长度:4.9 mm湿度敏感等级:1
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封装等效代码:SOP8,.25
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):235电源:5 V
认证状态:Not Qualified座面最大高度:1.75 mm
子类别:Power Management Circuits最大供电电流 (Isup):1.5 mA
最大供电电压 (Vsup):6 V最小供电电压 (Vsup):1.5 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
处于峰值回流温度下的最长时间:30宽度:3.9 mm
Base Number Matches:1

LMC6953CM 数据手册

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April 1998  
LMC6953  
PCI Local Bus Power Supervisor  
General Description  
Features  
n Compliant to PCI specifications revision 2.1.  
The LMC6953 is a voltage supervisory chip designed to  
meet PCI (Peripheral Component Interconnect) Specifica-  
tions Revision 2.1. It monitors 5V and 3.3V power supplies.  
In cases of power-up, power-down, brown-out, power failure  
and manual reset interrupt, the LMC6953 provides an active  
low reset. RESET holds low for 100 ms after both 5V and  
3.3V powers recover, or after manual reset signal returns to  
high state. The external capacitor on pin 8 adjusts the reset  
delay.  
n Under and over voltage detectors for 5V and 3.3V  
n Power failure detection (5V falling under 3.3V by  
300 mV max)  
n Manual reset input pin  
n Guaranteed RESET assertion at VDD 1.5V  
n Integrated reset delay circuitry  
n Open drain output  
n Adjustable reset delay  
n Response time for over and under voltage detection:  
490 ns Max  
n Power failure response time: 90 ns Max  
n Requires minimal external components  
=
This part is ideal on PCI motherboards or add-in cards to en-  
sure the integrity of the entire system when there is a fault  
condition. The active low reset sets the microprocessor or lo-  
cal device in a known state.  
The LMC6953 has a built-in bandgap reference that accu-  
rately determines all the threshold voltages. The internal re-  
set delay circuitry eliminates additional discrete components.  
Applications  
n Desktop PCs  
n PCI-Based Systems  
n Network servers  
Typical Application Circuits  
On Mother Board  
On Add-in Cards  
DS012846-23  
DS012846-24  
© 1998 National Semiconductor Corporation  
DS012846  
www.national.com  

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