DS1873T+ Maxim Integrated Products, DS1873T+ Datasheet - Page 54

• Manufacturer Part Number: DS1873T+
• Description: IC CTLR SFP+ ANLG LDD 28-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Laser Diode Controllerr

Specifications of DS1873T+

• Number Of Channels: 1
• Voltage - Supply: 2.85 V ~ 3.9 V
• Current - Supply: 2.5mA
• Operating Temperature: -40°C ~ 95°C
• Package / Case: 28-WFQFN Exposed Pad
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 90-1873T+000

SFP+ Controller with Analog LDD Interface
Table 02h, Register 80h: MODE
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80h
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
MEMORY TYPE
SEEB
BIT 7
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
SEEB:
0 = (Default) Enables EEPROM writes to SEE bytes.
1 = Disables EEPROM writes to SEE bytes during configuration, so that the configuration of the part
is not delayed by the EE cycle time. Once the values are known, write this bit to a 0 and write the
SEE locations again for data to be written to the EEPROM.
RESERVED
DAC1 EN:
0 = DAC1 VALUE is writable by the user and the LUT recalls are disabled. This allows users to
interactively test their modules by writing the values for DAC1. The output is updated with the new
value at the end of the write cycle. The I
1 = (Default) Enables auto control of the LUT for DAC1 VALUE.
DAC2 EN:
0 = DAC2 VALUE is writable by the user and the LUT recalls are disabled. This allows users to
interactively test their modules by writing the values for DAC2. The output is updated with the new
value at the end of the write cycle. The I
1 = (Default) Enables auto control of the LUT for DAC2 VALUE.
AEN:
0 = The temperature-calculated index value TINDEX is writable by users and the updates of
calculated indexes are disabled. This allows users to interactively test their modules by
controlling the indexing for the LUTs. The recalled values from the LUTs appear in the DAC
registers after the next completion of a temperature conversion.
MOD EN:
0 = Modulation is writable by the user and the LUT recalls are disabled. This allows users to
interactively test their modules by writing the DAC value for modulation. The output is updated with the
new value at the end of the write cycle. The I
1 = (Default) Enables auto control of the LUT for modulation.
APC EN:
0 = APC DAC is writable by the user and the LUT recalls are disabled. This allows users to
interactively test their modules by writing the DAC value for APC reference. The I
the end of the write cycle. The HBIAS DAC is also writable if recalls are disabled.
1 = (Default) Enables auto control of the LUT for APC reference.
BIAS EN:
0 = BIAS DAC is controlled by the user and the APC is in manual mode. This allows the user to
interactively test their modules by writing the DAC value for bias.
1 = (Default) Enables auto control for the APC feedback.
RESERVED
3Fh
PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
PW2 or (PW1 and PRTBL2)
Volatile
DAC1 EN
DAC2 EN
2
C STOP condition is the end of the write cycle.
2
C STOP condition is the end of the write cycle.
2
C STOP condition is the end of the write cycle.
AEN
Table 02h Register Descriptions
MOD EN
APC EN
2
C STOP condition is
BIAS EN
BIT 0