
Si3050 + Si3011/18/19
102
Rev. 1.5
14
C2A
Isolation Capacitor 2A.
Connects to one side of the isolation capacitor C2. Used to communicate with
the line-side device.
15
C1A
Isolation Capacitor 1A.
Connects to one side of the isolation capacitor C1. Used to communicate with
the line-side device.
16
VA
Regulator Voltage Reference.
This pin connects to an external capacitor and serves as the reference for the
internal voltage regulator.
17
VDD
Digital Supply Voltage.
Provides the 3.3 V digital supply voltage to the Si3050.
18
GND
Ground.
Connects to the system digital ground.
19
SCLK
Serial Port Bit Clock Input.
Controls the serial data on SDO and latches the data on SDI.
20
SDITHRU
SDI Passthrough Output.
Cascaded SDI output signal to daisy-chain the SPI interface with additional
devices.
21
NC
No connect.
22
NC
No connect.
Table 26. Si3050 Pin Descriptions (Continued)
QFN
Pin #
TSSOP
Pin #
Pin Name
Description