參數(shù)資料
型號(hào)： ASM809JEUR-T
廠商： ALLIANCE SEMICONDUCTOR CORP
元件分類： 電源管理
英文描述： 3 Pin Microcontroller Power Supply Supervisor
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3
封裝： PLASTIC, SOT-23, 3 PIN
文件頁(yè)數(shù)： 3/10頁(yè)
文件大?。?/td> 220K
代理商： ASM809JEUR-T
RESET
3 of 10
Notice: The information in this document is subject to change without notice
3 Pin Microcontroller Power Supply Supervisor
ASM809, ASM810
October 2003
rev 1.0
Application Information
Negative V
CC
Transients
The ASM809/810 protect μPs from brownouts and low V
CC
.
Short duration transients of 100mV amplitude and 20μs or
less duration typically do not cause a false RESET.
Valid Reset with V
CC
under 1.1V
When V
CC
is under 1.1V, to ensure logic inputs connected to
the ASM809 RESET pin are in a known state, a 100k
pull-
down resistor is needed at RESET . The value of the resistor
is not critical. A 100k
pull-up resistor to V
CC
at RESET is
needed with the ASM810.
Bidirectional Reset Pin Interfacing
The ASM809/810 can interface with μP / μC bi-directional
reset pins by connecting a 4.7k
resistor in series with the
ASM809/810 reset output and the μP/μC bi-directional reset
pin.
V
CC
Power Supply
ASM809
RESET
GND
100k
V
CC
Power Supply
ASM810
GND
100k
Power supply
BUF
Buffered
RESET
V
CC
ASM809
GND
GND
RESET
RESET
Input
μC or μP
4.7k
Bi-directional I/O Pin
Figure 2: RESET valid with V
CC
under 1.1V
Figure 3: RESET valid with V
CC
under 1.1V
Figure 4: Bidirectional Reset Pin Interfacing
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