SI3012 ETC, SI3012 Datasheet - Page 48

• Manufacturer Part Number: SI3012
• Description: 3.3 V FCC/JATE DIRECT ACCESS ARRANGEMENT
• Manufacturer: ETC

S i3 03 5
Pin Descriptions: Si3012
48
(SOIC or
TSSOP)
Pin #
10
1
2
3
4
5
6
7
8
9
Pin Name
VREG2
VREG
RNG1
RNG2
TSTA
TSTB
IGND
C1B
QB
QE
Test Input A.
Allows access to test modes which are reserved for factory use. This pin has an
internal pull-up and should be left as a no connect for normal operation.
Test Input B.
Allows access to test modes which are reserved for factory use. This pin has an
internal pull-up and should be left as a no connect for normal operation.
Isolated Ground.
Connects to ground on the line-side interface.
Isolation Capacitor 1B.
Connects to one side of isolation capacitor C1.
Ring 1 Input.
Connects through a capacitor to the TIP lead of the telephone line. Provides the ring
and caller ID signals to the Si3035.
Ring 2 Input.
Connects through a capacitor to the RING lead of the telephone line. Provides the
ring and caller ID signals to the Si3035.
Transistor Base.
Connects to the base of the hookswitch transistor, Q3.
Transistor Emitter.
Connects to the emitter of the hookswitch transistor, Q3.
Voltage Regulator.
Connects to an external capacitor to provide bypassing for an internal voltage
regulator.
Voltage Regulator 2.
Connects to an external capacitor to provide bypassing for an internal voltage
regulator.
Table 22. Si3012 Pin Descriptions
RNG1
RNG2
TSTA
TSTB
IGND
C1B
Si3012 (SOIC or TSSOP)
QB
QE
1
2
3
4
5
6
7
8
Rev. 1.2
16
15
14
13
12
10
11
9
Description
TX
NC
RX
REXT
DCT
HYBD
VREG2
VREG