RX1+
1
RX1-
2
RX2+
3
RX2-
4
RX3+
5
RX3-
6
RX4+
7
RX4-
8
LOCK
11
RXCKO
12
TX-
31
TX+
32
AESOUT
34
BLS
35
SYNC
36
BCKA
37
LRCKA
38
SDINA
39
SDOUTA
40
SDOUTB
45
SDINB
46
LRCKB
47
BCKB
48
MCLK
25
RXCKI
13
MUTE
14
RDY
15
NC
41
CPM
18
CS/A0
19
CCLK/SCL
20
CDIN/A1
21
CDOUT/SDA
22
INT
23
RST
24
GPO1
26
GPO2
27
GPO3
28
GPO4
29
U7A
SRC4392IPFBR
GND
3.3V
GND
0.1µF
C18
33.0
R16
0.1µF
C19
0.1µF
C20
0.1µF
C21
L4
GND
RX1+
RX1-
RX2+
RX2-
3.3V
COAX SPDIF IN
OPTICAL
I2C_ADD=0xE0
4
3
1
J5
SPDIF-IN
SDOUT-USB
BCLK-USB
LRCLK-USB
0.1µF
16V
C24
GND
S2
SPDIF-RESET
SPDIF
SPDIF-RESET
LRCLK-SRC
SDOUT-SRC
SDA
I2C
SCL
I2S
USB-SPDIF
SPDIF
IN
VCC
1
GND
2
VOUT
3
N
C
4
N
C
5
U4
SPDIF-IN
GND
SCLK-SRC
LRCLK-SRC
SDOUT-SRC
MCLK-SRC
SCLK-SRC
LRCLK-PSIA
MCLK-PSIA
BCLK-PSIA
SDIN-PSIA
GND
GND
3.3V
MCLK-MUX
GND
GND
3.3V
BCLK-MUX
GND
GND
3.3V
LRCLK-MUX
GND
GND
3.3V
SDIN-MUX
GND
GND
RESET
SPDIF-RESET
1.00k
R20
4.99k
R22
3.3V
3.3V
SDA-SRC
SCL-SRC
SDOUT-USB
LRCLK-USB
BCLK-USB
EXTERNAL I2S (AIB)
3.3V
12V
3.3V
LRCLK-EXT
DIN-EXT
MCLK-EXT
BCLK-EXT
LRCLK-EXT
DIN-EXT
PVDD
FAULT
SRC POWER NODES ON POWER SUPPLY PA GE
(U7B)
FROM
DUT
PSIA CLOCK SELECT
MCLK-EXT
BCLK-EXT
CLIP_OTW
0
R28
OUT-A
OUT-B
OUT-D
OUT-C
OUT-C
OUT-D
OUT-B
OUT-A
0
R26
0
R27
SCL-AIB
SDA-AIB
SDOUT
Blue
D2
SPDIF-LOCK
0.1µF
C59
3.3V
GND
0.1µF
C69
3.3V
GND
0.1µF
C70
3.3V
GND
0.1µF
C108
3.3V
GND
PVDD-EXT
A
1
B
2
Y
3
GND
4
Y
5
A/B
6
G
7
VCC
8
U9
SN74LVC2G157DCTR
A
1
B
2
Y
3
GND
4
Y
5
A/B
6
G
7
VCC
8
U11
SN74LVC2G157DCTR
A
1
B
2
Y
3
GND
4
Y
5
A/B
6
G
7
VCC
8
U13
SN74LVC2G157DCTR
A
1
B
2
Y
3
GND
4
Y
5
A/B
6
G
7
VCC
8
U14
SN74LVC2G157DCTR
MUX_CTRL
MUX_CTRL
MUX_CTRL
MUX_CTRL
GND
3.3V
I2S
MCLK
SCLK
LRCK
SDIN
49.9
R17
49.9
R18
49.9
R21
49.9
R24
GND
3.3V
GND
3.3V
GND
3.3V
GND
3.3V
GND
3.3V
GND
3.3V
GND
3.3V
INTERBOARD
GND
SDA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
J9
I2X
MCLK-IBC
BCLK-IBC
LRCLK-IBC
SDIN-IBC
CONNECTOR
MCLK-IBC
BCLK-IBC
LRCLK-IBC
SDIN-BUF
MUX_CTRL
MSP430
I2S-BUF-EN
I2S-BUF-EN
DECOUPLING
0.1µF
C110
3.3V
GND
0.1µF
C111
3.3V
GND
0.1µF
C112
3.3V
GND
0.1µF
C113
3.3V
GND
0.1µF
C114
3.3V
GND
0.1µF
C115
3.3V
GND
0.1µF
C116
3.3V
GND
0.1µF
C117
3.3V
GND
10.0k
R119
10.0k
R121
10.0k
R122
GND
3.3V
A0-SRC
A1-SRC
3.3V
10.0k
R123
GND
10.0k
R120
100k
R115
GND
100k
R116
GND
100k
R117
GND
100k
R118
GND
GND
GND
GND
GND
CLIP_OTW
FAULT
RST-AIB
MCLKI
VDD
4
OE/STANDBY
1
GND
2
OUT
3
24.576MHz
Y2
VDD
4
OE/STANDBY
1
GND
2
OUT
3
22.5792MHz
Y3
FREQ SELECT
FREQ-SEL
0
R130
GND
GND
3.3V
3.3V
2
4
5
3
U27
LVC1G14
3.3V
GND
FREQ-SEL
0
R132
2
4
5
3
U28
LVC1G14
3.3V
GND
I2S-BUF-EN
0.1µF
C118
3.3V
GND
0.1µF
C119
3.3V
GND
0.1µF
C120
3.3V
GND
0.1µF
C121
3.3V
GND
0.1µF
C122
3.3V
GND
0.1µF
C123
3.3V
GND
J34
GND
ALIGNMENT
HEADER
AIB
NC
5
U18B
LVC1G125DSF
1
2
3
4
6
U18A
LVC1G125DSF
NC
5
U20B
LVC1G125DSF
NC
5
U22B
LVC1G125DSF
NC
5
U24B
LVC1G125DSF
1
2
3
4
6
U20A
LVC1G125DSF
1
2
3
4
6
U22A
LVC1G125DSF
1
2
3
4
6
U24A
LVC1G125DSF
NC
5
U19B
LVC1G125DSF
NC
5
U21B
LVC1G125DSF
NC
5
U23B
LVC1G125DSF
NC
5
U25B
LVC1G125DSF
1
2
3
4
6
U19A
LVC1G125DSF
1
2
3
4
6
U21A
LVC1G125DSF
1
2
3
4
6
U23A
LVC1G125DSF
1
2
3
4
6
U25A
LVC1G125DSF
TO MSP430
GPIO_AIB-1
RST-AIB
GPIO_AIB-2
MUTE-AIB
GPIO_AIB-1
GPIO_AIB-2
MUTE-AIB
SDOUT
1
2
3
J30
J9 DATA SEL
SDIN-BUF
SDIN-IBC
FROM DUT
0
R11
3.3V
0
R12
GND
1
2
3
J3
GND
SCL
1
2
3
J6
GND
1
2
3
J4
GND
1
2
3
J7
GND
1
3
5
6
4
2
7
9
10
8
12
11
14
13
16
15
18
17
20
19
22
21
24
23
26
25
28
27
J28
560
R19
RXCKO
FREQ-SEL
GND
GND
3.3V
A
1
B
2
Y
3
GND
4
Y
5
A/B
6
G
7
VCC
8
U31
SN74LVC2G157DCTR
J1
MCLK-SEL
GND
10.0k
R66
3.3V
A0-SRC
Green
D3
SPDIF-READY
3.3V
1.00k
R23
A0-SRC
I2S-BUF-EN
MUX_CTRL
SPDIF-RESET
10.0k
R25
0
R168
I2S-BUF-EN
SDA
SCL
0
R131
MCLK-SEL
MCLK-SEL
MCLK-SEL
0
R169
0
R170
SDA
SCL
SCL-SRC
SDA-SRC
SDA
SCL
SDA
SCL
MCLK-XTAL
0.1µF
C156
3.3V
GND
Schematic and Bill of Materials
8
SLAU757 – January 2018
Copyright © 2018, Texas Instruments Incorporated
TAS3251 Evaluation Module
ADVANCE INFORMATION
Figure 6. TAS3251EVM Schematics (3 of 6)