DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 72

• Manufacturer Part Number: DS1874T+
• Description: IC CTLR SFP+ ANLG LDD 28-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Laser Diode Controllerr

Specifications of DS1874T+

• 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
• Number Of Outputs: 5
• Duty Cycle (max): 50 %
• Output Voltage: 0 V to 3.9 V
• Mounting Style: SMD/SMT
• Switching Frequency: 0 KHz to 400 KHz
• Operating Supply Voltage: 2.85 V to 3.9 V
• Supply Current: 2.5 mA to 10 mA
• Maximum Operating Temperature: + 95 C
• Fall Time: 300 ns
• Minimum Operating Temperature: - 40 C
• Rise Time: 300 ns
• Synchronous Pin: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 90-1874T+000

Table 02h, Register C2h: MODTI
SFP+ Controller with Digital LDD Interface
Table 02h, Register C3h: DAC1TI
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C3h
C2h
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
DAC1 temperature index (DAC1TI) defines the TempCo boundary for the DAC1 LUT. The DAC1TC bit (Table 02h,
Register C6h) defines the polarity of the TempCo. This value is compared with the adjusted memory address
used during the LUT recall, not the value in the TINDEX register (Table 02h, Register 81h).
The modulation temperature index defines the TempCo boundary for the MODULATION LUT. The MODTC bit
(Table 02h, Register C6h) defines the polarity of the TempCo.
BIT 7
BIT 7
2
2
7
7
2
2
6
6
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
2
2
5
5
DAC1TI =
MODTI =
2
2
Temp _ Value + 40°C
Temp _ Value + 40°C
4
4
2°C
4°C
2
2
3
3
+ 80h
+ 80h
2
2
2
2
2
2
1
1
BIT 0
BIT 0
2
2
0
0