参数资料
型号: PEF80902
厂商: INFINEON TECHNOLOGIES AG
英文描述: 4B3T Second Gen. Modular ISDN NT(Ordinary)
中文描述: 4B3T二将军模块化综合业务数字网新台币(普通)
文件页数: 81/83页
文件大小: 1168K
代理商: PEF80902
PEF 80902
Appendix: Differences between Q- and T-SMINTO
Data Sheet
73
2001-11-12
6.3
External Circuitry
The external circuitry of the Q- and T-SMINT O is equivalent; however, some external
components of the U-transceiver hybrid must be dimensioned different for 2B1Q and
4B3T. All information on the external circuitry is preliminary and may be changed in
future documents.
Figure 31
External Circuitry Q- and T-SMINT O
Note: the necessary protection circuitry is not displayed in
Figure 31
.
Table 33
Dimensions of External Components
Component
Q-SMINT O: 2B1Q
Transformer:
Ratio
Main Inductivity
14.5 mH
Resistance
1.3 k
Resistance
1.0 k
Resistance
9.5
Capacitor C
27 nF
R
PTC
and R
Comp
2R
PTC
+ 8R
Comp
= 40
T-SMINT O: 4B3T
1:2
1:1.6
7.5 mH
1.75 k
1.0 k
25
15 nF
n
2
×
(2R
COMP
+ R
B
)
+
R
L
= 20
Loop
AOUT
BOUT
AIN
BIN
n
C
R
T
R4
R
COMP
R
COMP
R
PTC
R
PTC
>1μ
R
R
R4
R
T
extcirc_U_Q2_exthybrid.emf
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