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TS3A227EYFFR Datasheet(PDF) 10 Page - Texas Instruments

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Part # TS3A227EYFFR
Description  Autonomous Audio Accessory Detection and Configuration Switch
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TS3A227EYFFR Datasheet(HTML) 10 Page - Texas Instruments

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DET _TRIGGER
INT
Insertion
de-bounce time
(90 ms default )
Accessory detection time
(A)
(B)
(D)
(E)
(F)
Removal
wait time
MIC_PRESENT
High
(C)
TS3A227E
SCDS358B – NOVEMBER 2014 – REVISED FEBRUARY 2015
www.ti.com
Timing Diagrams (continued)
A.
This is the point that DET_TRIGGER has stopped glitching and is fully low. The de-bounce time of 90 ms starts from
the point that the pin is constantly below the VIL level. Any time the DET_TRIGGER pin cross the VIH level the de-
bounce timer will restart.
B.
Point B is the end of the insertion de-bounce time and the beginning of accessory detection.
C.
Detection has completed at this point. The switches will be routed before the INT and MIC_PRESENT pins are pulled
low.
D.
INT is cleared after the host reads the interrupt register.
E.
The headset is removed here. The switch states will change immediately and INT will be pulled low. The
MIC_PRESENT pin will be released.
F.
After a 50 ms removal de-bounce timer the TS3A227E will go back into sleep mode if manual switch control is not
enabled
Figure 2. 4-Pole Accessory
10
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Product Folder Links: TS3A227E


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