MT9074AL Zarlink Semiconductor, Inc., MT9074AL Datasheet - Page 11

• Manufacturer Part Number: MT9074AL
• Description: T1/E1/J1 Single Chip Transceiver
• Manufacturer: Zarlink Semiconductor, Inc.

MT9074
11
Name
TX2-0
RRING
TRING
Transmit pulse amplitude. Select the TX2 –TX0 bits according to the line type, value of
termination resistors (RT), and transformer turns ratio used
TX2 TX1 TX0
After reset these bits are zero.
0
0
0
0
1
1
1
1
RTIP
TTIP
0
0
1
1
0
0
1
1
0.47uF
0
1
0
1
0
1
0
1
Table 2 -Transmit Pulse Amplitude (E1)
120 Ω /
75 Ω
Figure 6 - Analog Line Interface (E1)
+5V
Line Impedance(
R
R
T
T
120 / 75
120
120
120
75
75
75
75 / 120
Functional Description
Ω
)
1:1
1:2
0
0
15
12.1
0
0
9.1
12.1
RT(
Ω
)
Fuse
Fuse
Fuse
Fuse
Transformer Ratio
R
tor. Please check Table
2 for specific resistor
values.
1:2
1:1
1:2
1:2
1:2
1:1
1:2
1:2
T
: Termination resis-
Rx
Tx
Data Sheet