82P2281PFG8 IDT, Integrated Device Technology Inc, 82P2281PFG8 Datasheet - Page 138

• Manufacturer Part Number: 82P2281PFG8
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82P2281PFG8

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Package Type: TQFP
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

T1/J1 Transmit And Receive Termination Configuration (032H)
T_TERM[2:0]:
R_TERM[2:0]:
T1/J1 Interrupt Enable Control 0 (033H)
DF_IE:
LOS_IE:
Programming Information
IDT82P2281
Bit Name
Bit Name
Default
Default
Bit No.
Bit No.
Type
Type
These bits select the internal impedance of the transmit path to match the cable impedance:
= 000: The 75 Ω internal impedance matching is selected.
= 001: The 120 Ω internal impedance matching is selected.
= 010: The 100 Ω internal impedance matching is selected. (It is the standard value for T1 mode).
= 011: The 110 Ω internal impedance matching is selected. (It is the standard value for J1 mode).
= 1xx: Reserved.
In T1/J1 mode, the external impedance circuit is not supported in transmit path.
These bits select the internal impedance of the receive path to match the cable impedance:
= 000: The 75 Ω internal impedance matching is selected.
= 001: The 120 Ω internal impedance matching is selected.
= 010: The 100 Ω internal impedance matching is selected. (It is the standard value for T1 mode).
= 011: The 110 Ω internal impedance matching is selected. (It is the standard value for J1 mode).
= 1xx: The internal impedance matching is bypassed, and external impedance circuit should be used.
= 0: Disable the interrupt on the INT pin when the DF_IS bit (b2, T1/J1-03AH) is ‘1’.
= 1: Enable the interrupt on the INT pin when the DF_IS bit (b2, T1/J1-03AH) is ‘1’.
= 0: Disable the interrupt on the INT pin when the LOS_IS bit (b0, T1/J1-03AH) is ‘1’.
= 1: Enable the interrupt on the INT pin when the LOS_IS bit (b0, T1/J1-03AH) is ‘1’.
7
7
Reserved
6
6
T_TERM2
Reserved
R/W
5
0
5
T_TERM1
R/W
4
0
4
138
SINGLE T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
T_TERM0
R/W
3
0
3
R_TERM2
DF_IE
R/W
R/W
2
1
2
0
R_TERM1
Reserved
R/W
1
1
1
August 20, 2009
R_TERM0
LOS_IE
R/W
R/W
0
1
0
0