参数资料
型号: PM4314-RI
厂商: PMC-SIERRA INC
元件分类: 数字传输电路
英文描述: QUAD T1/E1 LINE INTERFACE DEVICE
中文描述: DATACOM, PCM TRANSCEIVER, PQFP128
封装: PLASTIC, QFP-128
文件页数: 61/170页
文件大小: 823K
代理商: PM4314-RI
PM4314 QDSX
DATA SHEET
PMC-950857
ISSUE 5
QUAD T1/E1 LINE INTERFACE DEVICE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
49
Figure 16
- External Analog Transmit Interface Circuit
1:1.36
VDD
C2
TAVS
TAVD
TC
TXTIP
TXRING
T
R
C3
optional
"snubbing "
network
R1
C1
0 to 655
foot cable
for DSX-1
R3
DSX-1/E1
Interface
R2
R1
47
±10%
22
±10%
47
±10%
C1
1nF±10%
1nF±10%
1nF±10%
C2
470nF±10%
470nF±10%
470nF±10%
C3
0.68μF±10%,50V
0.68μF±20%,50V
0.68μF±20%,50V
R2
2.7
±5%,1/8W
6.2
±5%,1/8W
0
R3
100
120
75
Format
DSX-1Zo=100
E1 Zo=120
E1 Zo=75
The transformer used should be designed for use in T1/CEPT/ISDN-PRI
applications. Many manufacturers have standard products for these applications.
Typical characteristics of a suitable transformer are given in the following table.
Table 3
-
Turns
Ratio
(PRI:SEC)
OCL
(mH min.)
C
w/w
(pF max.)
L
L
(μH max.)
DCR pri.
(
max.)
DCR sec.
(
max.)
1:1.36
1.20
35
0.80
0.80
1.2
where
OCL
is the open-circuit inductance,
C
w/w
is the inter-winding capacitance,
L
L
is the leakage inductance, and
DCR is the DC resistance.
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