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APX825A4-26W6G-7

更新时间： 2024-11-17 03:08:59
品牌 Logo 应用领域
美台 - DIODES 光电二极管
页数 文件大小 规格书
12页 177K
描述
Power Management Circuit, PDSO6

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APX825A4-26W6G-7 数据手册

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APX823/APX824/APX825A  
PROCESSOR SUPERVISORY CIRCUITS  
Description  
Pin Assignments  
(Top View)  
The APX823/APX824/APX825A family of supervisors  
provides circuit initialization and timing supervision, primarily  
for DSP and processor-based systems.  
5
4
1
2
3
VCC  
RESET  
GND  
During power-on,  
is asserted when supply voltage  
RESET  
APX823  
VCC becomes higher than 1.1V. Thereafter, the supply  
voltage supervisor monitors VCC and keeps active as  
RESET  
WDI  
MR  
long as VCC remains below the threshold voltage VTH-. An  
internal timer delays the return of the output to the inactive  
state (high) to ensure proper system reset. The delay time, td  
SOT25  
starts after VCC has risen above the threshold voltage VTH-  
When the supply voltage drops below the threshold voltage  
TH-, the output becomes active (low) again. No external  
components are required. All the devices of this family have a  
fixed-sense threshold voltage VTH- set by an internal voltage  
divider.  
.
(Top View)  
V
5
4
1
2
3
VCC  
RESET  
GND  
APX824  
The APX823/APX825A devices incorporate a manual reset  
WDI  
RESET  
input,  
. A low level at  
causes  
MR  
to become  
RESET  
MR  
active. The APX824/APX825A devices include a high-level  
output RESET. APX823/APX824/APX825A have a watchdog  
timer that is periodically triggered by a positive or negative  
transition at WDI. When the supervising system fails to  
retrigger the watchdog circuit within the time-out interval,  
SOT25  
(Top View)  
6
1
VCC  
ttout,  
becomes active for the time period td. This  
RESET  
GND  
RESET  
event also reinitializes the watchdog timer. Leaving WDI  
unconnected disables the watchdog.  
2
3
APX825A  
SOT26  
5
4
WDI  
In applications where the input to the WDI pin may be active  
(transitioning high and low) when the APX823/APX824/APX8  
RESET  
MR  
25A asserting  
the APX823/APX824/APX825A does  
RESET  
not return to a non-reset state when the input voltage is  
above Vt. The product spectrum is designed for supply  
voltage of 2.5V, 3V, 3.3V and 5V. The circuits are available in  
a
SOT25  
and  
SOT26  
packages.  
The  
APX823/APX824/APX825A devices are characterized for  
operation over a temperature range of -40oC to 105oC.  
Applications  
Features  
•
Applications Using DSPs, Microcontrollers, or  
Microprocessors  
•
Power-on reset generator with fixed delay time of 200ms  
Typ  
•
•
•
•
•
•
•
Industrial Equipment  
Programmable Controls  
Automotive Systems  
Portable/Battery-Powered Equipment  
Intelligent Instruments  
•
•
Manual reset input (APX823/APX825A)  
Reset output available in active-low  
(APX823/APX824/APX825A), active-high  
(APX824/APX825A)  
Supply voltage supervision range 2.5V, 3V, 3.3V, 5V  
Watchdog timer  
•
•
•
•
•
Wireless Communications Systems  
Notebook/Desktop Computers  
Supply current of 30μA (Typ.)  
Temperature range: -40°C to 85°C  
SOT25 and SOT26: Available in “Green” Molding  
Compound (No Br, Sb)  
•
Lead Free Finish/RoHS Compliant (Note 1)  
Note:  
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.  
1 of 12  
www.diodes.com  
May 2011  
© Diodes Incorporated  
APX823/APX824/APX825A  
Document number: DS31323 Rev. 4 - 2  
1234567...12

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