DS1875T+ Maxim Integrated Products, DS1875T+ Datasheet - Page 91

• Manufacturer Part Number: DS1875T+
• Description: IC SFP CTRLR/TRIPLEXER 38-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of DS1875T+

• Applications: Fiber Optics
• Interface: I²C
• Voltage - Supply: 2.85 V ~ 3.9 V
• Package / Case: *
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
Table 08h, Register 80h to C7h: BIAS OPEN-LOOP LUT
Auxiliary Memory A0h, Register 00h to FFh: EEPROM
80h to C7h
80h to FFh
PACKAGE TYPE
38 TQFN-EP
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
The BIAS OPEN-LOOP LUT is a set of registers assigned to hold the temperature profile for the BIAS OL DAC.
The values in this table determine the set point for the BIAS current. The temperature measurement is used to
index the LUT (TINDEX, Table 02h, Register 81h) in 2°C increments from -40°C to +102°C, starting at 80h in
Table 08h. Register 80h defines the -40°C to -38°C BIAS OL output, Register 81h defines the -38°C to -36°C
BIAS OL output, and so on. Values recalled from this EEPROM memory table are written into the BIAS OL (Table
02h, Register FDh) location that holds the value until the next temperature conversion. The DS1875 can be
placed into a manual mode (BIAS EN bit, Table 02h, Register 80h), where BIAS OL DAC is directly controlled for
calibration. If the temperature compensation functionality is not required, then program the entire Table 08h to
the desired BIAS OL setting.
Accessible with the slave address A0h.
BIT 7
BIT 7
______________________________________________________________________________________
2
2
7
7
2
2
6
6
PON Triplexer and SFP Controller
00h
ALL
ALL
Nonvolatile (EE)
00h
All
All
Nonvolatile (EE)
2
2
5
5
PACKAGE CODE
T3857+1
2
2
Auxiliary Memory A0h Register Descriptions
4
4
2
2
3
3
Table 08h Register Descriptions
Package Information
2
2
2
2
DOCUMENT NO.
21-0172
2
2
1
1
BIT 0
BIT 0
2
2
0
0
91