need LM1876 mute mode and standby mode help

JozzaG · 9th February 2010, 03:31 AM

i've recently bought the LM1876 IC chip and the datasheet does not offer any help as to what kind of circuit should be used if the person wishes to use the standby and/or mute functions. it also does not show wether to connect it to the positve voltage Vcc ot the negative voltage Vee.

Can anyone help me with a simple schematic and explanation of what to use if i wish to use both mute and standby.

Thanks.

Minion · 9th February 2010, 11:54 PM

From Reading the Datasheet it seems that the Mute and Standby functions are controlled by a Logic gate , logic-high voltage will mute it and Logic-low voltage will un-mute it , it is simular for the Standby function .....

Since I don"t have a clue about logic gates I couldn"t tell you how to implement it ......

In appliciation information it talks about the Mute and standby pins but I can"t make heads or tails of it ......

http://www.national.com/ds/LM/LM1876.pdf

JozzaG · 10th February 2010, 12:06 AM

yes i was much the same. i may end up scrapping the mute idea and just not worrying about it. i did have a simple diagram drawn up whcih i thought may work, but im not too sure.

Redshift187 · 10th February 2010, 04:25 PM

If grounded, both mute and standby are disabled. But you may get unwanted turn on pops. A logic "high" is often 5V, and it says mute and standby must be at least 2.5V to function.

9th February 2010, 03:31 AM	#1
JozzaG diyAudio Member Join Date: Feb 2010 Blog Entries: 1	need LM1876 mute mode and standby mode help i've recently bought the LM1876 IC chip and the datasheet does not offer any help as to what kind of circuit should be used if the person wishes to use the standby and/or mute functions. it also does not show wether to connect it to the positve voltage Vcc ot the negative voltage Vee. Can anyone help me with a simple schematic and explanation of what to use if i wish to use both mute and standby. Thanks.

10th February 2010, 04:25 PM	#4
Redshift187 diyAudio Member Join Date: Aug 2008	If grounded, both mute and standby are disabled. But you may get unwanted turn on pops. A logic "high" is often 5V, and it says mute and standby must be at least 2.5V to function. __________________ http://arresting-audio.com/

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9th February 2010, 11:54 PM	#2
Minion diyAudio Member Join Date: May 2006	From Reading the Datasheet it seems that the Mute and Standby functions are controlled by a Logic gate , logic-high voltage will mute it and Logic-low voltage will un-mute it , it is simular for the Standby function ..... Since I don"t have a clue about logic gates I couldn"t tell you how to implement it ...... In appliciation information it talks about the Mute and standby pins but I can"t make heads or tails of it ...... http://www.national.com/ds/LM/LM1876.pdf

10th February 2010, 12:06 AM	#3
JozzaG diyAudio Member Join Date: Feb 2010 Blog Entries: 1	yes i was much the same. i may end up scrapping the mute idea and just not worrying about it. i did have a simple diagram drawn up whcih i thought may work, but im not too sure.

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