HFC-4S Cologne Chip AG, HFC-4S Datasheet - Page 158

• Manufacturer Part Number: HFC-4S
• Description: Isdn HDLC Fifo Controller With 8 (4) Integrated S/t Interfaces
• Manufacturer: Cologne Chip AG

HFC-4S
HFC-8S
5.5.3 Transformer and ISDN jack connection
Figure 5.10 show the connection circuitry of the transformer and the ISDN jack in TE mode
termination resistors R1 and R2 are optional.
Figure 5.11: Transformer and connector circuitry in NT mode (shown with optional 100
bus termination must be 50
158 of 273
1
The ISDN jack RJ-45 has 8 pins and carries two pairs of
wires. Standard configuration is
pin 3: TE
pin 4: NT
pin 5: NT
pin 6: TE
NT (
NT (
TE (
TE (
·
·
),
),
),
).
Figure 5.10: Transformer and connector circuitry in TE mode
ª
)
TR1A
REC
TR1B
TRANS
TR1A
REC
TR1B
TRANS
S/T interface
Data Sheet
-
JP1
34V - 42 V
R1
R2
RJ-45 plug
8
5
4
3
6
1
ISDN jack
R J 4 5
-
+
+
-
5
4
3
6
ISDN jack
R J 4 5
-
+
+
-
RJ-45 jack
1
8
March 2003 (rev. A)
ª
termination, whole
Cologne
Chip
1
. The