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參數資料
| 型號： | ASM8500 |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Low Power 5V / 3.3V uP Reset Active LOW, Open - Drain Output |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 |
| 封裝： | PLASTIC, SOT-89 |
| 文件頁數： | 1/7頁 |
| 文件大?。?/td> | 191K |
| 代理商： | ASM8500 |
Alliance Semiconductor
ASM8500
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
rev 1.0
Low Power 5V / 3.3V μP Reset Active LOW, Open - Drain Output
November 2003
General Description
The ASM8500 is a voltage supervisory device with a low-power,
5V
/
3.3V μP Reset, active LOW, open-drain output. Maximum
supply current over temperature is a low 6μA.
The ASM8500 generates an active LOW reset signal whenever
the monitored supply is out of tolerance. A precision reference
and comparator circuit monitor power supply (V
CC
) level. Reset
threshold tolerance level is ±1.5%. When an out-of-tolerance
condition is detected, an internal power-fail signal is generated
which forces an active LOW reset signal. After V
CC
returns to
an in-tolerance condition, the reset signal remains active for
1.5ms to allow the power supply and system microprocessor to
stabilize.
The ASM8500 is designed with a open-drain output stage and
operates over the extended industrial temperature range.
Devices are available in compact surface mount SOT-89
packages.
Other low power products in this family include the ASM1810/
11/12/15/16/17, ASM1233D and ASM1233M.
Key Features
Low Supply Current
6 μA maximum (5.5 V)
Automatically restarts a microprocessor after power failure
1.5ms reset delay after V
CC
returns to an in-tolerance con-
dition
Active LOW power-up reset
Precision temperature-compensated voltage reference and
comparator
Eliminates external components
Compact surface mount SOT-89 package
Operating temperature -40°C to +85°C
Applications
Set-top boxes
Cellular phones
PDAs
Energy management systems
Embedded control systems
Printers
Single board computers
Typical Operating Circuit
Block Diagram
Microprocessor
V
CC
RESET
RESET
GND
ASM8500
V
CC
Supply
Bias
Reference
1.5ms
Typical
-
ASM8500
Tolerance
Delay
GND
RESET
+
5Κ
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