Issue 572: AV connector OMTP/AHJ mux (dual standard)

Reported by Joerg Reisenweber, Mar 21, 2014

AV receptacle should be able to handle both OMTP (old Nokia style 
incl N900, most other devices with 4pin 3.5mm AV) and AHJ (Apple, 
most Android phones) 
The difference is swap between pin3(ring2) and pin4(GND+sleeve).

Consider TI

* tmo thread: #1690 #1692 #1694
* OMTP whitepaper / spec:
* headphone jack standards:

Comment 1 by Joerg Reisenweber, Mar 21, 2014

Note that in  TS3A225E datasheet ( 
r=ts3a225e&fileType=pdf) there is a massive error in page:21 
table:2 "OMTP" in the columns 
"pin-configuration" - the other data for OMAP n that table 
seems right.

Comment 2 by Nikolaus Schaller, Mar 22, 2014

Main differences between 225e and 226ae:

225e has additional I2C interface and has +/- symmetrical interface 
for MIC.

226ae has no I2C and references MIC to GND - and is only available 
in YFF-WCSP (0.4mm BGA) package.

Fortunately the pin layout of the YFF package is in a way that it is 
possible to use a single layer 125um board.

Current choice for Pyra and Neo900 is TS3A225ERTE (QFN package)

Comment 3 by Nikolaus Schaller, Dec 14, 2020

Status: WontFix

Created: 10 years 3 months ago by Joerg Reisenweber

Updated: 3 years 7 months ago

Status: WontFix

Owner: Joerg Reisenweber

Followed by: 1 person