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AMS803Z 数据表(PDF) 2 Page - Advanced Monolithic Systems Ltd

部件名 AMS803Z
功能描述  Precision supply-voltage monitor
Download  8 Pages
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制造商  AMS [Advanced Monolithic Systems Ltd]
网页   http://www.ams-semitech.com
标志 AMS - Advanced Monolithic Systems Ltd

AMS803Z 数据表(HTML) 2 Page - Advanced Monolithic Systems Ltd

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Pin Configuration
Pin Description
Pin
Type
Description
VCC
-
Supply Voltage. Reset is asserted when VCC drops below the Reset Threshold Voltage (VRST). Reset
remains asserted until VCC rises above VRST and keep asserted for the duration of the Reset Timeout
Period (tRS) once VCC rises above VRST.
GND
-
Ground
RESET
O
Active-Low Reset Output (Push-Pull). It goes low when Vcc is below the reset threshold. It remains
low for about 200ms after Vcc rises above the reset threshold (VRST).
Functional Description
Reset Output
A microprocessor (
µP) reset input starts the µP in a known state. Whenever the µP is in an unknown state, it should be held in
reset. The supervisory circuits assert reset during power-up and prevent code execution errors during power-down or brownout
conditions.
On power-up, once Vcc reaches about 1.0V, /RESET is a guaranteed logic low of 0.4V or less. As Vcc rises, /RESET stays low.
When Vcc rises above the reset threshold, an internal timer releases /RESET after about 200ms. /RESET pulses low whenever
Vcc drops below the reset threshold, i.e. brownout condition. If brownout occurs in the middle of a previously initiated reset pulse,
guaranteed to be 0.4V or less until Vcc drops below 1.0V. Reset Timing Diagram shows the timing relationship.
1
2
VCC
GND
RESET
3
SOT23-3
AMS803/09/10XT
AMS803/09/10
Advanced Monolithic Systems http://www.ams-semitech.com
2


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