82V2088BBG IDT, Integrated Device Technology Inc, 82V2088BBG Datasheet - Page 42

• Manufacturer Part Number: 82V2088BBG
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82V2088BBG

• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

OCTAL CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
Table-33 TCF1: Transmitter Configuration Register 1
mode, for E1/75 Ω cable impedance, the PULS[3:0] bits should be set to ‘0001’.
Table-34 TCF2: Transmitter Configuration Register 2
1. In internal impedance matching mode, for E1/75 Ω cable impedance, the PULS[3:0] bits (TCF1, 03H...) should be set to ‘0000’. In external impedance matching
DFM_OFF
PULS[3:0]
SCAL[5:0]
Symbol
Symbol
THZ
-
-
(R/W, Address = 04H,24H,44H,64H,84H,A4H,C4H,E4H)
(R/W, Address = 03H,23H,43H,63H,83H,A3H,C3H,E3H)
7-6
3-0
Bit
7-6
5-0
Bit
5
4
Default
Default
100001
0000
00
00
0
1
Transmit driver failure monitor disable
These bits select the transmit template/LBO for short-haul/long-haul applications.
Reserved. This bit should be ‘0’ for normal operation.
= 0: DFM is enabled
= 1: DFM is disabled
Transmit line driver high impedance enable
= 0: normal state
= 1: transmit line driver high impedance enable (other transmit path still in normal state)
Reserved
SCAL specifies a scaling factor to be applied to the amplitude of the user-programmable arbitrary pulses which is
to be transmitted if needed. The default value of SCAL[5:0] is ‘100001’. Refer to
trary
= 110110: default value for T1 0~133 ft, T1 133~266 ft, T1 266~399 ft, T1 399~533 ft, T1 533~655 ft, J1 0~655 ft,
= 010001: default value for DS1 -7.5 dB LBO. One step change of this value results in 6.25% scaling up/down
= 001000: default value for DS1 -15.0 dB LBO. One step change of this value results in 12.5% scaling up/down
= 000100: default value for DS1 -22.5 dB LBO. One step change of this value results in 25% scaling up/down
= 100001: default value for E1 75 Ω and 120 Ω. One step change of this value results in 3% scaling up/down
DS1 0dB LBO. One step change of this value results in 2% scaling up/down against the pulse amplitude.
against the pulse amplitude.
against the pulse amplitude.
against the pulse amplitude.
against the pulse amplitude.
Waveform.
0000
0001
0010
0100
0101
1000
1001
1010
0011
0110
0111
1011
11xx
1
User programmable waveform setting
T1/E1/J1
DSX1
DSX1
DSX1
DSX1
DSX1
DS1
DS1
DS1
DS1
E1
E1
J1
42
2.048 MHz
2.048 MHz
1.544 MHz
1.544 MHz
1.544 MHz
1.544 MHz
1.544 MHz
1.544 MHz
1.544 MHz
1.544 MHz
1.544 MHz
1.544 MHz
TCLK
Description
Description
Impedance
120 Ω
100 Ω
100 Ω
100 Ω
100 Ω
100 Ω
110 Ω
100 Ω
100 Ω
100 Ω
100 Ω
Cable
75 Ω
-22.5 dB LBO
Cable Range
-7.5 dB LBO
-15 dB LBO
133~266 ft
266~399 ft
399~533 ft
533~655 ft
0 dB LBO
3.2.3.3 User-Programmable Arbi-
TEMPERATURE RANGES
0~133 ft
0~655 ft
or LBO
-
-
0~43 dB (default)
INDUSTRIAL
Cable Loss
0.6~1.2 dB
1.2~1.8 dB
1.8~2.4 dB
2.4~3.0 dB
0~28.5 dB
0~13.5 dB
0~0.6 dB
0~3.0 dB
0~43 dB
0~36 dB
0~21 dB