BU7831KN_06 Datasheet, PDF (8/17 Pages) Rohm – Voice/Audio Mixer & Selector

ST1L
ST1R
200k
200k
ST2L
ST2R
ST3L
ST3R
100k
C VC O M _O U T
100k
100k
C VC O M _O U T
Fig.23 Input pins equivalent circui
・Analog output part
The following is about Analog output part (EXTO, SPL, SPR, HPL, HPR).
Each output amplifier is linked path select (MIXER1～5).
Because stereo output is presumed, HPL and HPR are turned ON/OFF at the same time, and with
pop sound decrease function.
MIXER1
MIXER2
MIXER3
MIXER4 or MIXER5
At the time of path choice
At the time of path choice
At the time of path choice
At the time of path choice
SPL output amplifier ON
SPR output amplifier ON
EXTO output amplifier ON
HPL, HPR output amplifier ON
Be careful that noise from the outside and so on doesn't turn because it becomes Hi-z though
the output that isn’t used is open and there is no problem.
When it is anxious, pull-down in about 100kΩ.
Output
Port
EXTO
SPL
SPR
HPL
HPR
Output impedance (DC)
At ON
1.4Ω
2.2Ω
1.5Ω
0.6Ω
Output impedance (DC)
At OFF
Hi-z
Hi-z
GND short
8/16