-31-
Pin No.
Pin Name
I/O
Description
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
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
AGNDC
AVSS1
AVSS0
NC
OUTL
NC
OUTR
NC
AVDDO
AVDDI
NC
XTI
XTO
CLKO
SCL
SDA
VSS
VDD
MCS1
MCS2
DEECTRL
NC
CLI
DAI
WSI
_____
PORQ
TESTEN
NC
AUX2L
AUX2R
AUX1L
AUX2R
NC
DEEML
DEEMR
NC
FOUTL
FOPL
FINL
NC
FOUTR
I/O
I
I
–
O
–
O
–
I
I
–
I
I/O
O
I/O
I/O
–
–
I
I
I
–
–-
I
I
I
I
–
I
I
I
I
–
O
O
–
O
I/O
I/O
–
O
Analog reference voltage
VSS 1 for audio back-end.
VSS 0 for audio output amplifiers.
Not used
Audio output: Headphone left or s
Not used
Audio output: Headphone right or speaker –
Not used
VDD 0 for audio output amplifiers
VDD 1 for audio back-end
Not used
Quartz oscillation pin 1
Quartz oscillation pin 2
Clock output
1
2
C clock
1
2
C data
Digital VSS
Digital VDD
1
2
C chip select 1
1
2
C chip select 2
Deemphasis ON/OFF control
Not used
1
2
S bit clock
1
2
S data
1
2
S frame identification
Power-on reset, active-low
Test enable
Not used
AUX2 left input for external analog signals (e.g. tape)
AUX2 right input for external analog signals (e.g. tape)
AUX1 left input for external analog signals (e.g. FM)
AUX1 right input for external analog signals (e.g. FM)
Not used
Deemphasis network left
Deemphasis network right
Not used
Output to left external filter
Filter op amp inverting input, left
Input for FOUTL or filter op amp output (line out)
Not used
Output to right external filter
IC DESCRIPTION - 6/6 (DAC3550A-C2) - 1/2
