Si3056
Si3018/19/10
8. Pin Descriptions: Si3018/19/10
QE
DCT
RX
DCT2
IGND
DCT3
QB
QE2
SC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IB
C1B
C2B
VREG
RNG1
VREG2
RNG2
Table 25. Si3018/19/10 Pin Descriptions
Description
Pin #
Pin Name
1
QE
Transistor Emitter.
Connects to the emitter of Q3.
2
3
4
DCT
RX
IB
DC Termination.
Provides dc termination to the telephone network.
Receive Input.
Serves as the receive side input from the telephone network.
Isolation Capacitor 1B.
Connects to one side of isolation capacitor C1. Used to communicate with the system-
side device.
5
6
C1B
C2B
Internal Bias.
Provides internal bias.
Isolation Capacitor 2B.
Connects to one side of the isolation capacitor C2. Used to communicate with the
system-side device.
7
8
VREG
RNG1
Voltage Regulator.
Connects to an external capacitor to provide bypassing for an internal power supply.
Ring 1.
Connects through a resistor to the RING lead of the telephone line. Provides the ring
and caller ID signals to the system-side device.
9
RNG2
Ring 2.
Connects through a resistor to the TIP lead of the telephone line. Provides the ring
and caller ID signals to the system-side device.
10
11
VREG2
SC
Voltage Regulator 2.
Connects to an external capacitor to provide bypassing for an internal power supply.
Circuit Enable.
Enables transistor network. Should be tied through a 0 Ω resistor to I
.
GND
12
QE2
Transistor Emitter 2.
Connects to the emitter of transistor Q4.
86
Rev. 1.05
SILICON [ SILICON ]
