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VCCD_C_1V8
L21
120 OHM
VCC_AUX_1V8
VCC_C_CORE_1V8
L22
120 OHM
VCC_2V5
VCC_C_2V5
L23
120 OHM
Figure 5-5: GS12090 Schematic 3
VCC_AUX_1V8
VCC281_CORE_1V8
L25
120 OHM
VDD281_1V8
L8
120 OHM
IN
IN
IN
VCC281_2V5
VCC_2V5
L27
IN
120 OHM
Figure 5-6: GS12281 Schematic
RDK-12GCONV
Reference Design Kit User Guide
PDS-061593
U19
30
LOOP_OUT
CONTROLLED 75R MICROSTRIP
R115
2
LOOP_IN
4.7UF
R163
C126
3
SDI_TERM
2
4.7UF
C197
6
TX1_N
TX1N
DDIN
IN
4.7UF
100R DIFF MICROSTRIP FROM U3 LENGTH MATCHED
C198
7
TX1_P
TX1P
DDIP
IN
4.7UF
5
TERM
32
RSVD_32
9
RSVD_9
11
GSPI_SD5
SDIN
IN
12
GSPI_SD6
SDOUT
OUT
13
GSPI_SCK
IN
10
GSPI_CSB0
CS
IN
34
VCO_FILT
VCC281_CORE_1V8
U20
C18
2
DDI_P
DDIP
RSVD_2
4.7UF
C20
3
DDI_N
DDIN
RSVD_3
4.7UF
C207
6
TX0_N
TX0N
DDIP
4.7UF
C208
7
TX0_P
TX0P
DDIN
4.7UF
C138
5
DDI_REF
100NF
R27
32
REF_CLK
0
9
RSVD_9
11
GSPI_SD6
SDIN
IN
12
GSPI_MISO
SDOUT
OUT
13
GSPI_SCK
SCLK
IN
10
GSPI_CSB0
CS
IN
C137
30
VCO_FILT10
10UF
C13
34
VCO_FILT
10UF
www.semtech.com
Rev.0
August 2017
VCCD_C_1V8 VCC_C_CORE_1V8VCC_C_2V5
27
SDIO3
SDIO
C203
26
SDON
4.7UF
CONTROLLED 75R MICROSTRIP
23
RX3P
DDOP
22
RX3N
DDON
GS12090
17
GPIO0
18
GPIO1
33
GPIO2
36
GPIO3
SCLK
39
LF+
40
LF-
VDD281_1V8
VCC281_2V5
27
SDO0P
SDO0P
C227
R6
26
SDO0N
4.7UF
75
23
SDO1P/RCOP
22
SDO1N/RCON
GS12281
17
GPIO0
18
GPIO1
33
GPIO2
36
GPIO3
WHITE
TX_GPIO_0
39
LF+
TP19
40
LF-
HIGH SPEED OUTPUTS
J4
J4
CONTROLLED 75R MICROSTRIP
C202
1
SDIO_3
BNC
4.7UF
R130
75
C200
RX3_P
OUT
4.7UF
C201
RX3_N
OUT
4.7UF
MICRO_ISP3_N
OUT
GS12070_ISP3_N
OUT
J5
J5
VCC_3V3
C211
1
SDO0_P
BNC
4.7UF
Q1
1
G
NTR4501N
WHITE
TX_GPIO_1
TP21
WHITE
TX_GPIO_2
TP20
WHITE
TX_GPIO_3
TP16
Proprietary & Confidential
VCC_3V3
VCC_3V3
Q2
1
G
VCC_3V3
NTR4501N
Q19
1
G
NTR4501N
Q20
1
G
NTR4501N
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