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參數(shù)資料
| 型號(hào)： | ASM812REUS-T |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | 4 Pin P Voltage Supervisor with Manual Reset |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4 |
| 封裝： | PLASTIC, SOT-143, 4 PIN |
| 文件頁(yè)數(shù)： | 2/10頁(yè) |
| 文件大?。?/td> | 229K |
| 代理商： | ASM812REUS-T |
2 of 10
Notice: The information in this document is subject to change without notice
4 Pin μP Voltage Supervisor with Manual Reset
ASM811, ASM812
October 2003
rev 1.0
Pin Diagram:
Block Diagram
Pin Description
Pin #
Pin
Name
Function
ASM811
ASM812
1
1
GND
Ground.
2
-
RESET
RESET is asserted LOW if V
CC
falls below V
TH
and remains LOW for T
RST
after V
CC
exceeds
the Threshold. In addition, RESET is active LOW as long as the manual reset is low.
-
2
RESET
RESET is asserted HIGH if V
CC
falls below V
TH
and remains HIGH for T
RST
after V
CC
exceeds
the threshold. In addition, RESET is active HIGH as long as the manual reset is low.
3
3
MR
Manual Reset Input. A logic LOW on MR asserts reset. Reset remains active as long as MR is
LOW and for T
MRST
after MR returns HIGH. The active low input has an internal 20k
pull-up
resistor. The input should be left open if not used. It can be driven by TTL or CMOS logic or
shorted to ground by a switch.
4
4
V
CC
Power supply input voltage (3.0V, 3.3V, 5.0V)
Detailed Description
A
microcontroller to start in a known state. ASM811/812 assert
reset to prevent code execution errors during power-up, power-
down and brown-out conditions.
proper
reset
input
enables
a
microprocessor
/
Reset Timing
The reset signal is asserted- LOW for the ASM811 and HIGH
for the ASM812- when the V
CC
supply voltage falls below the
threshold trip voltage and remains asserted for 140ms
minimum after the V
CC
has risen above the threshold.
Manual Reset (MR) Input
A logic low on MR assserts RESET LOW on the ASM811 and
RESET HIGH on the ASM812. MR is internally pulled high
through a 20k
resistor and can be driven by TTL/CMOS gates
or with open collector/drain outputs. MR can be left open if not
used. MR may be connected to ground through a normally-
open momentary switch without an external debounce circuit.
A 0.1μF capacitor from MR to ground can be added for
additional noise immunity.
1
2
3
SOT143
ASM811
(ASM812)
GND
RESET
V
CC
(RESET)
4
MR
+
-
RESET Generator
-
+
V
CC
RESET
(RESET)
GND
ASM811
(ASM812)
4.38V
4.00V
3.08V
2.93V
2.63V
4.38V
4.63V
MR
20k
V
CC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ASM811MEUS-T | 4 Pin P Voltage Supervisor with Manual Reset |
| ASM812MEUS-T | 4 Pin P Voltage Supervisor with Manual Reset |
| ASM811LEUS-T | 4 Pin P Voltage Supervisor with Manual Reset |
| ASM811JEUS-T | 4 Pin P Voltage Supervisor with Manual Reset |
| ASM811 | 4 Pin P Voltage Supervisor with Manual Reset |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ASM812SEUS | 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:4-Pin muP Voltage Supervisor with Manual Reset |
| ASM812SEUSF | 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:4-Pin muP Voltage Supervisor with Manual Reset |
| ASM812SEUS-T | 制造商:ALSC 制造商全稱(chēng):Alliance Semiconductor Corporation 功能描述:4 Pin P Voltage Supervisor with Manual Reset |
| ASM812TEUS | 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:4-Pin muP Voltage Supervisor with Manual Reset |
| ASM812TEUSF | 制造商:ONSEMI 制造商全稱(chēng):ON Semiconductor 功能描述:4-Pin muP Voltage Supervisor with Manual Reset |
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