IDT82V2082 Integrated Device Technology, Inc., IDT82V2082 Datasheet - Page 24

• Manufacturer Part Number: IDT82V2082
• Description: 2Ch T1/J1/E1 Short Haul/long Haul Liu
• Manufacturer: Integrated Device Technology, Inc.

DUAL CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
select impedance matching for both receiver and transmitter on a per chan-
nel basis. If TERMn pin is low, internal impedance network will be used. If
TERMn pin is high, external impedance network will be used in E1 mode,
or external impedance network for receiver and internal impedance net-
work for transmitter will be used in T1/J1 mode. (This applies to ZB die revi-
sion only). When internal impedance network is used, PULSn[3:0] pins
should be set to select specific internal impedance for the corresponding
channel. Refer to
3.4.2
ing on channels located in other chips can be performed by tapping the mon-
itored channel through a high impedance bridging circuit. Refer to
9
RRINGn is dramatically attenuated. To compensate this attenuation, the
Monitor Gain can be used to boost the signal by 22 dB, 26 dB and 32 dB,
selected by MG[1:0] bits (RCF2, 0BH...). For normal operation, the Monitor
Gain should be set to 0 dB.
Gain on a per channel basis. When MONTn pin is low, the Monitor Gain for
the specific channel is 0 dB. When MONTn pin is high, the Monitor Gain for
the specific channel is 26 dB. Refer to
MARY
and Figure-10.
In hardware control mode, TERMn, PULSn[3:0] pins can be used to
In both T1/J1 and E1 short haul applications, the non-intrusive monitor-
After a high resistance bridging circuit, the signal arriving at the RTIPn/
In hardware control mode, MONTn pin can be used to set the Monitor
for details.
LINE MONITOR
5 HARDWARE CONTROL PIN SUMMARY
R
X
Note:
1. Common decoupling capacitor
2. Cp 0-560 (pF)
3. D1 - D8, Motorola - MBR0540T1;
T
Line
X
Line
A
B
5 HARDWARE CONTROL PIN SUM-
•
•
2:1
1:1
•
•
Figure-8 Transmit/Receive Line Circuit
Cp
2
R
R
•
•
R
R
T
T
VDDRn
D6
D5
for details.
•
·
VDDTn
Figure-
VDDTn
International Rectifier - 11DQ04 or 10BQ060
VDDRn
D2
D1
D8
D7
D4
D3
3
•
•
•
·
·
·
24
One of the Two Identical Channels
RTIPn
RRINGn
TTIPn
TRINGn
Figure-9 Monitoring Receive Line in Another Chip
Figure-10 Monitor Transmit Line in Another Chip
DSX cross connect
DSX cross connect
point
point
R
R
GNDRn
VDDRn
GNDTn
VDDTn
0.1µF
0.1µF
•
•
TEMPERATURE RANGES
68µF
68µF
RTIP
TTIP
TRING
RRING
RRING
RRING
3.3 V
1
3.3 V
RTIP
1
RTIP
monitor gain
=22/26/32dB
monitor gain
normal transmit mode
normal receive mode
gain=0dB
=22/26/32dB
monitor
monitor gain
monitor mode
monitor mode
INDUSTRIAL