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AP7311 - The mysterious IC
AP7311 - The mysterious IC
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Old 14th September 2018, 12:46 PM   #1
erpawan is offline erpawan  India
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Default AP7311 - The mysterious IC

Recently i cam across the AP7311 is used in my 5.1 home theater system from true sound waltz. This is has inputs from aux/dvd etc and output goes to power amplifier. Clock and data lines going to sp3306 mcu. This AP7311 has 28 pins. This IC seems to be prologic decoder with audio analog input selection and digital volume controller. Can anybody help me in identifying this IC exactly what it is. Will be thankful if somebody share its datasheet as well.
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Old 14th September 2018, 01:54 PM   #2
batteryman is offline batteryman  United Kingdom
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Quote:
Originally Posted by erpawan View Post
Recently i cam across the AP7311 is used in my 5.1 home theater system from true sound waltz. This is has inputs from aux/dvd etc and output goes to power amplifier. Clock and data lines going to sp3306 mcu. This AP7311 has 28 pins. This IC seems to be prologic decoder with audio analog input selection and digital volume controller. Can anybody help me in identifying this IC exactly what it is. Will be thankful if somebody share its datasheet as well.
The AP7311 seems to be a voltage regulator. Are you sure you have not misread the number?
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Old 14th September 2018, 05:26 PM   #3
erpawan is offline erpawan  India
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I have attached the snap taken from the PCBA...you can zoom and check...i am 100% sure it is AP7311 ic.
Attached Images
File Type: jpg IMG_20180914_213340.jpg (743.9 KB, 185 views)
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Old 14th September 2018, 05:47 PM   #4
erpawan is offline erpawan  India
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I did a lot of research and checked various ic online around this, for example TDA7311, NJU7311. For pro-logic and surround, there is no IC on PCBA. So i am expecting that this (AP7311) IC should have functionality of :
1. Analog input selection mux for 5 audio inputs.
2. Some sort of Prologic/Surround processing.
3. Digital Volume control functionality.
4. And finally output to 6 channel power amplifier.
5. The IC should have 28 pin smd package may be so28.
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Old 20th September 2018, 08:48 PM   #5
dimitri is offline dimitri  United States
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I think it is NJU7311AM
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Old 23rd September 2018, 10:36 AM   #6
erpawan is offline erpawan  India
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No, it cannot be, NJU7311AM is 30 pin IC instead of 28. If i consider that it is NJU7311AL (being 28 Pin IC), then its 14th pin is 'vss' while the AP7311 is has 14th pin is 'data'.
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Old 23rd September 2018, 11:56 AM   #7
MAAC0 is offline MAAC0  Portugal
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https://www.mouser.com/ds/2/294/NJU7311A_E-51496.pdf. Check the AL version.
It can be be almost any rebranded IC.
Why do You say pin 14 is data ? There are some capacitors near that pin and it makes sense being for decoupling.

Last edited by MAAC0; 23rd September 2018 at 12:04 PM.
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