pef82902 Infineon Technologies Corporation, pef82902 Datasheet - Page 240

• Manufacturer Part Number: pef82902
• Description: 4b3t Second Generation Modular Isdn Nt Intelligent Extended
• Manufacturer: Infineon Technologies Corporation

7.3
The external circuitry of the Q- and T-SMINT
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 88
Note: the necessary protection circuitry is not displayed in
Table 48
Component
Transformer:
Ratio
Main Inductivity
Resistance
Resistance
Resistance
Capacitor C
R
Data Sheet
PTC
and R
BOUT
AOUT
AIN
BIN
External Circuitry
Comp
Dimensions of External Components
External Circuitry Q- and T-SMINT
Q-SMINT
1:2
14.5 mH
1.3 k
1.0 k
9.5
27 nF
2R
PTC
+ 8R
R4
R4
R
R
â
T
T
IX: 2B1Q
Comp
Appendix: Differences between Q- and T-SMINT‚IX
= 40
226
R
R
COMP
COMP
â
IX is equivalent; however, some external
C
â
IX
T-SMINT
1:1.6
7.5 mH
1.75 k
1.0 k
25
15 nF
n
2
× (2R
n
Figure
COMP
â
>1µ
IX: 4B3T
88.
R
R
PTC
PTC
+ R
extcirc_U_Q2_exthybrid.emf
Loop
B
)
PEF 81902
2001-11-12
R
L
= 20