參數(shù)資料
型號： AN6175K
廠商： PANASONIC CORP
元件分類： 通信及網(wǎng)絡
英文描述： LJT 29C 29#16 SKT WALL RECP
中文描述： SPECIALTY TELECOM CIRCUIT, PDIP42
封裝： 0.600 INCH, SHRINK, PLASTIC, DIP-42
文件頁數(shù)： 15/21頁
文件大小： 210K
代理商： AN6175K
15
ICs for Telephone
AN6175K
I
Detailed Pin Descriptions
Equivalent circuit
Description
Pin No.
Symbol
1
2
3
4
5
MAO(HF)
MAI(HF)
MAI(HS)
MAO(HS)
TND
[MIC preamplifier output in the HF mode]
Amplified HF mode transmitter signals
are output from this pin through C7(0.1
μ
F)and R15(5.1 k
)to pin 7 to become
the LOG amp.1 input. The output impe-
dance, Zout
=
50
.
[MIC preamplifier input in the HF mode]
HF mode transmitter signals are input
from ECM. Use R9 and R10 to adjust the
transmitter signal gain, and use C3 and
C44 to adjust the frequency characteris-
tics.
[MIC preamplifier input in the HS mode]
HS mode transmitter signals are input
from the handset MIC. Use R12 and R13
to adjust the transmitter signal gain, and
use C6 and C45 to adjust the frequency
characteristics.
[MIC preamplifier output in the HS mode]
Amplified HS mode transmitter signals
are output from this pin. The output
impedance, Zout
=
1 k
.
[Noise detecting circuit control]
Turns ON or OFF the background-noise
detecting circuit in the HS mode. The
circuit turns ON if this pin is grounded
through C7(SW7 to a), and turns OFF if
this pin is grounded directly(SW7 to b).
+
1
40
40
HF mode MIC
preamplifier
To the transmitter
attenuator
V
CC
1
2
+
3
+
+
4
V
CC
1
To the line driver
HS mode MIC
preamplifier
5
V
CC
1
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