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参数资料
| 型号： | SP810EK-L-4-4/TR |
| 厂商： | Exar Corporation |
| 文件页数： | 1/8页 |
| 文件大小： | 0K |
| 描述： | IC MPU RESET CIRC 4.4V SOT23-3 |
| 标准包装： | 2,500 |
| 类型： | 简单复位/加电复位 |
| 监视电压数目： | 1 |
| 输出： | 推挽式，图腾柱 |
| 复位： | 高有效 |
| 复位超时： | 最小为 140 ms |
| 电压 - 阀值： | 4.4V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23-3 |
| 包装： | 带卷 (TR) |
S P 8 0 9 / S P 8 1 0
3 P i n M i c r o p r o c e s s o r S u p e r v i s o r C i r c u i t
February 2011
GENERAL DESCRIPTION
The SP809/SP810 are low power
microprocessor ( μ P) supervisory circuits used
to monitor power supplies in μ P and digital
systems.
They provide applications with benefits of
circuit reliability and low cost by eliminating
external components. If the VCC supply
voltage falls below preset threshold then a
reset signal is asserted for at least 140ms
after V CC has risen above the reset threshold.
Both the SP809 and SP810 were designed with
a reset comparator to help identify invalid
signals, which last less than 140ms. The only
difference between them is that they have an
active-low RESET output and active-high
RESET output, respectively. Low supply
current (1 μ A) makes SP809/SP810 ideal for
portable equipment.
The devices are available in 3 pin SOT-23
package.
Rev. 2.0.0
APPLICATIONS
? Portable Electronic Devices
? Electrical Power Meters
? Digital Still Cameras
? μP Power Monitoring
FEATURES
? Ultra Low Supply Current 1μA (typ)
? Guaranteed Reset valid to V CC = 0.9V
? 140ms Power-On Reset Pulse Width
? Internally Fixed Threshold
2.3V, 2.6V, 2.9V, 3.1V, 4.4V, 4.6V
? 1.5% Voltage Threshold Tolerance
? 3 Pin SOT-23 Package
Part Number
SP809N
SP809
SP810
Output Type
Open Drain Active Low
Push-Pull Low
Push-Pull Active High
TYPICAL APPLICATION DIAGRAM
Fig. 1: SP809 / SP810 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
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