PEF82912FV1.4 Infineon Technologies, PEF82912FV1.4 Datasheet - Page 148
PEF82912FV1.4
Manufacturer Part Number
PEF82912FV1.4
Description
ISDN Interface ISDN
Manufacturer
Infineon Technologies
Datasheet
1.PEF82912FV1.4.pdf
(240 pages)
Specifications of PEF82912FV1.4
Mounting Style
SMD/SMT
Package / Case
MQFP-64
Lead Free Status / Rohs Status
Details
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Receiver
The receiver of the S-transceiver is symmetrical. 10 k
recommended in each receive path. It is preferable to split the resistance into two
resistors for each line. This allows to place a high resistance between the transformer
and the diode protection circuit (required to pass 96 kHz input impedance test of
ITU I.430 [8] and ETS 300012-1). The remaining resistance (1.8 k ) protects the S-
transceiver itself from input current peaks.
•
Figure 70
3.3.4
Figure 71
•
Figure 71
Data Sheet
SR1
SR2
illustrates the recommended oscillator circuit.
Oscillator Circuitry
External Circuitry S-Interface Receiver
Crystal Oscillator
1k8
1k8
C
C
15.36 MHz
LD
LD
V
DD
134
GND
XOUT
XIN
8k2
8k2
Operational Description
overall resistance are
PEF 82912/82913
extcirc_S.vsd
DC Point
2 : 1
2001-03-30
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