Specifications

AN93
Rev. 0.9 169
GPIO1/EOFR
GPIO2/CD_
GPIO3/ESC
GPIO4/AOUT/INT_
TXD
RESET_
RXD
CTS_
GPIO5/RI_
VDD
TIP RING
External
crystal option
Emissions
option
Please submit layout to Silicon Labs for review prior to PCB fabrication.
Note: Z1 can be replaced by an MOV or MLV.
Ferrite beads are used for best EMI
performance. In some situations, R15/R16 can be replaced with 0 ohm resistors.
No Ground Plane In DAA Section
R1YR1Y
Q3Q3
C3C3
R5R5
R19R19
R1ZR1Z
C51C51
R2XR2X
C50C50
C1C1
Q2Q2
C9C9
R8R8
C2C2
C41C41
C5C5
R2YR2Y
R4R4
FB1FB1
C11C11
R7R7
R21R21
R16R16
Z1Z1
R20R20
C40C40
R13R13
C8C8
Q1Q1
C4C4
R1XR1X
R2ZR2Z
XTALI/CLKIN
1
XTALO
2
GPIO5
3
VD
4
RXD
5
TXD
6
CTS
7
RESET
Si2493/57/34/15/04FS
8
C2A
9
C1A
10
GPIO4
11
GND
12
VA
13
GPIO3
14
GPIO2
15
GPIO1
16
U1U1
-+
D1
-+
D1
R12R12
R10R10
R6R6
12
Y1Y1
FB2FB2
RV1RV1
R18R18
R15R15
C1B
1
C2B
2
VREG
3
CID
4
RX
8
DCT
7
IGND epad
9
QE
5
QB
6
U2U2
Figure 37. Schematic of Si2493/57/34/15/04FS with Si3008