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ASM811TEUS-T 参数 Datasheet PDF下载

ASM811TEUS-T图片预览
型号: ASM811TEUS-T
PDF下载: 下载PDF文件 查看货源
内容描述: 4引脚P电压监控器,带有手动复位 [4 Pin P Voltage Supervisor with Manual Reset]
分类和应用: 电源电路电源管理电路光电二极管监控输入元件
文件页数/大小: 10 页 / 230 K
品牌: ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
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October 2003
rev 1.0
ASM811, ASM812
4 Pin µP Voltage Supervisor with Manual Reset
Six voltage thresholds are available to support 3V to 5V
systems:
General Description
The ASM811/ASM812 are cost effective low power supervisors
designed to monitor voltage levels of 3.0V, 3.3V and 5.0V
power
supplies
in
low-power
microprocessor
(µP),
microcontroller (µC) and digital systems. They provide excellent
reliability by eliminating external components and adjustments.
A reset signal is issued if the power supply voltage drops below
a preset reset threshold and is asserted for at least 140ms after
the supply has risen above the reset threshold. The ASM811
has an active-low output RESET that is guaranteed to be in the
correct state for V
CC
down to 1.1V. The ASM812 has an active-
high RESET output. The reset comparator is designed to ignore
fast transients on V
CC
. A debounced manual reset input allows
the user to manually reset the systems to bring them out of
locked state.
Low power consumption makes the ASM811/ASM812 ideal for
use in portable and battery operated equipment. The ASM811/
ASM812 are available in a compact 4-pin SOT-143 package
and thus use minimal board space.
RESET THRESHOLD
Suffix
L
M
J
T
S
R
Voltage
4.63
4.38
4.00
3.08
2.93
2.63
Features
New 4.0V threshold option
9µA supply current
Monitor 5V, 3.3V and 3V supplies
Manual reset input
140ms min. reset pulse width
Guaranteed over temperature
Active-low reset valid with 1.1V supply (ASM811)
Small 4-pin SOT-143 package
No external components
Power-supply transient-immune design
Applications
Computers and Controllers
Embedded controllers
Portable/Battery operated systems
Intelligent instruments
Wireless communication systems
PDAs and handheld equipment
Automotive systems
Safety Systems
Typical Operating Circuit
V
CC
V
CC
V
CC
µP
MR RESET
(RESET)
GND
RESET (RESET)
Input
GND
Alliance Semiconductor
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Notice: The information in this document is subject to change without notice