參數(shù)資料
型號(hào)： SI2494-A-FM
廠商： Silicon Laboratories Inc
文件頁(yè)數(shù)： 54/70頁(yè)
文件大小： 0K
描述： IC ISOMODEM 56KBPS 38-QFN
標(biāo)準(zhǔn)包裝： 364
系列： *
Si2494/39
58
Rev. 1.0
8. Pin Descriptions: Si3018
Table 17. Si3018 Pin Descriptions
Pin #
Pin Name
Description
1QE
Transistor Emitter.
Connects to the emitter of Q3.
2DCT
DC Termination.
Provides dc termination to the telephone network.
3
RX
Receive Input.
Serves as the receive side input from the telephone network.
4IB
Internal Bias.
Provides a bias voltage to the device.
5C1B
Isolation Capacitor 1B.
Connects to one side of isolation capacitor C1 and communicates with the system side.
6C2B
Isolation Capacitor 2B.
Connects to one side of isolation capacitor C2 and communicates with the system side.
7VREG
Voltage Regulator.
Connects to an external capacitor to provide bypassing for an internal power supply.
8RNG1
Ring 1.
Connects through a resistor to the RING lead of the telephone line. Provides the ring and
caller ID signals to the Si2494/39.
9RNG2
Ring 2.
Connects through a resistor to the TIP lead of the telephone line. Provides the ring and
caller ID signals to the Si2494/39.
10
VREG2
Voltage Regulator 2.
Connects to an external capacitor to provide bypassing for an internal power supply.
11
SC
SC Connection.
Enables external transistor network. Should be tied through a 0
resistor to IGND.
12
QE2
Transistor Emitter 2.
Connects to the emitter of Q4.
13
QB
Transistor Base.
Connects to the base of transistor Q4.
14
DCT3
DC Termination 3.
Provides the dc termination to the telephone network.
15
IGND
Isolated Ground.
Connects to ground on the line-side interface.
16
DCT2
DC Termination 2.
Provides dc termination to the telephone network.
QE
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DCT
RX
IB
C1B
C2B
VREG
RNG1
RNG2
VREG2
SC
QE2
QB
DCT3
IGND
DCT2
1
Si3018
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