MB86437 Datasheet, PDF (3/35 Pages) Fujitsu Component Limited. – 3 V Single Power Supply Audio Interface Unit (AIU)

MB86437
s PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Symbol
SWI
SWO
RAUD
VD1
JEAR
EAR
XEAR
VS1
TONE
TBO
TBI
PTBO
MDI
VD2
DSCK
EXSD
TAUD
MICO
MIC
XMIC
JMIC
JMICO
VS2
SGC
VS4
SGI
I/O A/D
Description
I/O
A/D
I/O pin for analog switch SW12
The standard on resistance for the analog switch is 500 Ω.
I/O
A/D
I/O pin for analog switch SW12
Connected to pin 1 via switch SW12.
O
A
Output pin for the received audio signal to the external speaker or for
testing.
P A Power supply pin for reception. Supply a voltage between 2.7 V and 3.6 V.
O
A
Amplifier output pin for the earphone speaker.
Can output 5 mW for a 32 Ω load.
Amplifier output pin for the receiver speaker. Internal BTL connection to
O A XEAR. The maximum output for a 32 Ω load between EAR and XEAR is 10
mW.
O
A
Amplifier output pin for the receiver speaker.
BTL connection to XEAR.
G A Ground pin for reception. Set to 0 V.
O
A
Amplifier output pin for the tone speaker. The output can be set to normal
mode, ground, or high impedance.
O
A
AMP4 output pin. Pair high pass filter with TBI so that there is no DC offset
at the speaker.
I A AMP4 inverted (–) input pin
O A PCM reception, tone addition output
Pin used to add an analog input signal to the tone section or apply an
I
A
envelope to the tone. Required functions can be selected by controlling
SW16. Setting SW16 off sets the input impedance to approximately 140 kΩ
and setting SW16 on sets the input impedance to approximately 210 kΩ.
P A Power supply pin for reception. Supply a voltage between 2.7 V and 3.6 V.
I/O A Can be connected to EXSD and TAUD by path switching.
I/O A Can be connected to DSCK and TAUD by path switching.
I/O A Can be connected to EXSD and DSCK by path switching.
O A Output pin for mike amplifier [1]
I A Inverted input pin (–) for mike amplifier [1]
I A Non-inverted input pin (+) for mike amplifier [1]
I A Inverted input pin (–) for mike amplifier [2]
O A Output pin for mike amplifier [2]
G A Ground pin for transmission. Set to 0 V.
Pin for connecting the bypass capacitor for the signal ground potential
O A generation circuit.
Connect a capacitor between SGC and VS2.
G A Ground pin for A/D and D/A. Set to 0 V.
I A General-purpose amplifier. To use, connect to SGO.
(Continued)
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