IDT82V2082 Integrated Device Technology, Inc., IDT82V2082 Datasheet - Page 23

• 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
3.3.5
T_OFF bit (TCF0, 04H...) to ‘1’. In this case, the TTIPn/TRINGn pins are
turned into high impedance.
setting PATTn[1:0] pins to ‘11’ on a per channel basis. Refer to
WARE CONTROL PIN SUMMARY
Table-15 Impedance Matching for Receiver
RTIP
RRING
The transmit path can be powered down individually by setting the
In hardware control mode, the transmit path can be powered down by
TRANSMIT PATH POWER DOWN
Cable Configuration
termination
E1/120 Ω
Receive
Internal
E1/75 Ω
T1
J1
Monitor Gain
for details.
Figure-7 Receive Path Function Block Diagram
Equalizer
Adaptive
R_TERM[2:0]
Internal Termination
000
001
010
011
5 HARD-
Data Slicer
23
3.4
Gain, Amplitude/Wave Shape Detector, Digital Tuning Controller, Adaptive
Equalizer, Data Slicer, CDR (Clock & Data Recovery), Optional Jitter Atten-
uator, Decoder and LOS/AIS Detector. Refer to Figure-7.
3.4.1
matching circuit or the external impedance matching circuit. If R_TERM[2]
is set to ‘0’, the internal impedance matching circuit will be selected. In this
case, the R_TERM[1:0] bits (TERM, 02H...) can be set to choose 75 Ω, 100
Ω, 110 Ω or 120 Ω internal impedance of RTIPn/RRINGn. If R_TERM[2]
is set to ‘1’, the internal impedance matching circuit will be disabled. In this
case, the external impedance matching circuit will be used to realize the
impedance matching.
the cable for one channel.
ance matching for receiver.
120 Ω
The receive path consists of Receive Internal Termination, Monitor
The impedance matching can be realized by the internal impedance
Figure-8
R
R
Recovery
and Data
RECEIVE PATH
RECEIVE INTERNAL TERMINATION
Clock
shows the appropriate external components to connect with
R_TERM[2:0]
Attenuator
Table-15
Jitter
1XX
External Termination
is the list of the recommended imped-
TEMPERATURE RANGES
LOS/AIS
Detector
Decoder
120 Ω
100 Ω
110 Ω
75 Ω
R
INDUSTRIAL
R
LOS
RCLK
RDP
RDN