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參數(shù)資料
| 型號： | ASM8500EUR-45F-T |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PSSO3 |
| 封裝： | ROHS COMPLIANT, PLASTIC, SOT-89, 3 PIN |
| 文件頁數(shù)： | 1/9頁 |
| 文件大小： | 138K |
| 代理商： | ASM8500EUR-45F-T |
ASM8500
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
rev 1.7
Low Power 5V / 3.3V P Reset Active LOW, Open - Drain Output
May 2005
General Description
The ASM8500 is a voltage supervisory device with a low-power,
5V
/3.3V P Reset, active LOW, open-drain output. Typical
supply current over temperature is a low 6A.
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 (VCC) level. Reset
threshold tolerance level is ±1.7% at room temperature. When
an out-of-tolerance condition is detected, an internal power-fail
signal is generated which forces an active LOW reset signal.
After VCC 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 and 3-
lead TO-92 packages.
Other low power products in this family include the ASM1810/
11/12/15/16/17 and ASM1233D/M.
Key Features
Low Supply Current
6 A typical (5.5 V)
Automatically restarts a microprocessor after power failure
1.5ms reset delay after VCC 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 and TO-92 packages
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
VCC
RESET
GND
ASM8500
VCC
Supply
Reference
Delay
1.5ms
Typical
Tolerance
Bias
+
-
ASM8500
VCC
Supply
Delay
Typical
Tolerance
Bias
-
GND
RESET
Reference
+
5.5Κ
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