參數(shù)資料
型號: PCA1070T
廠商: NXP SEMICONDUCTORS
元件分類: 通信及網(wǎng)絡
英文描述: Multistandard programmable analog CMOS transmission IC
中文描述: SPECIALTY TELECOM CIRCUIT, PDSO24
文件頁數(shù): 27/36頁
文件大?。?/td> 180K
代理商: PCA1070T
1997 Jun 20
27
Philips Semiconductors
Product specification
Multistandard programmable analog
CMOS transmission IC
PCA1070
TEST AND APPLICATION INFORMATION
The test circuit is illustrated in Fig.7. The basic application circuit is illustrated in Fig.8. An interrupter with an N-channel
depletion MOS transistor (e.g. BSD254A or BSP124) is shown. It is intended for applications where a low DC line voltage
is required. An interrupter with an N-channel enhancement MOS transistor (e.g. BSN304A or BSP130) can be used for
applications where a relatively high DC line voltage is allowed.
An application circuit for applications where a low DC line voltage and long line interrupts are required, is illustrated in
Fig.9 (interrupter with an N-channel depletion MOS transistor).
Fig.7 Test circuit of the PCA1070.
Definitions:
Gain sending channel G
M
= 20 log (V
LN
/V
MIC
) with S1 in position 1; V
DTMF
= 0.
Gain DTMF amplifier G
DTMF
= 20 log (V
LN
/V
DTMF
) with S1 in position 1; V
m
= 0.
Gain receiving channel G
rec
= 20 log (V
T
/V
LN
) with S1 in position 2; V
m
= 0.
Sidetone gain G
st
= 20 log (V
T
/V
MIC
) with S1 in position 1; V
DTMF
= 0.
handbook, full pagewidth
MGE345
100
250
20
150
μ
F
DOC
TX
SCR
LSI LN SLPE REG
PCA1070
VDD
VMC
SDA
SCL
CLK
DTMF
RMC
TST
OMIC
Vref
OREQ VP
MIC
+
MIC
QR
+
QR
VSS
470 nF
100
μ
F
100
nF
3.3
nF
100
nF
I
2
C-BUS
MASTER
TRANSCEIVER
+
VLN
Zline
IDOC
S1
1
2
Vrec
Iline
12 to 140
mA
ITX
VDOC
+
+
VDTMF
Vclk
Ip
5 V
Rt
+
+
Vt
VMIC
Rm
Vm
IVP
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