DS1876T+TR MAXIM [Maxim Integrated Products], DS1876T+TR Datasheet - Page 67

• Manufacturer Part Number: DS1876T+TR
• Description: SFP Controller with Dual LDD Interface
• Manufacturer: MAXIM [Maxim Integrated Products]

Table 06h, Register E8h–EFh: HTXP LUT
Table 06h, Register F0h–F7h: LTXP LUT
E8h–EFh
F0h–F7h
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
A2h AND B2h MEMORY
MEMORY TYPE
The HTXP LUT is used to temperature compensate the transmit power-high QT threshold (TXP HI). The table
below shows the range of temperature for each byte’s location. The table shows a rising temperature; for a fall-
ing temperature there is 1NC of hysteresis.
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
A2h AND B2h MEMORY
MEMORY TYPE
The LTXP LUT is used to temperature compensate the transmit power-low QT threshold (TXP LO). The table
below shows the range of temperature for each byte’s location. The table shows a rising temperature; for a fall-
ing temperature there is 1NC of hysteresis.
______________________________________________________________________________________
BIT 7
BIT 7
EAh
EBh
ECh
EDh
EEh
E8h
E9h
EFh
F0h
F1h
F2h
F3h
F4h
F5h
F6h
F7h
2
2
SFP Controller with Dual LDD Interface
7
7
Less than or equal to -8NC
Greater than -8NC up to +8NC
Greater than +8NC up to +24NC
Greater than +24NC up to +40NC
Greater than +40NC up to +56NC
Greater than +56NC up to +72NC
Greater than +72NC up to +88NC
Greater than +88NC
Less than or equal to -8NC
Greater than -8NC up to +8NC
Greater than +8NC up to +24NC
Greater than +24NC up to +40NC
Greater than +40NC up to +56NC
Greater than +56NC up to +72NC
Greater than +72NC up to +88NC
Greater than +88NC
2
2
6
6
00h
PW2 or (PW1 and RWTBL46)
PW2 or (PW1 and RWTBL46)
Different A2h and B2h memory locations
Nonvolatile (EE)
00h
PW2 or (PW1 and RWTBL46)
PW2 or (PW1 and RWTBL46)
Different A2h and B2h memory locations
Nonvolatile (EE)
2
2
5
5
2
2
4
4
2
2
3
3
2
2
2
2
2
2
1
1
BIT 0
BIT 0
2
2
0
0
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