DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 57

• 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 84h–85h: DAC1 VALUE
Table 02h, Register 86h–87h: DAC2 VALUE
84h
85h
86h
87h
The digital value used for DAC2 and recalled from Table 08h at the adjusted memory address found in TINDEX. This
register is updated at the end of the temperature conversion.
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
The digital value used for DAC1 and recalled from Table 07h at the adjusted memory address found in TINDEX.
This register is updated at the end of the temperature conversion.
SFP+ Controller with Digital LDD Interface
BIT 7
BIT 7
2
2
0
0
7
7
______________________________________________________________________________________
2
2
0
0
6
6
0000h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
(PW2 and DAC1 EN = 0) or (PW1 and RWTBL246 and DAC1 EN = 0)
Volatile
0000h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
(PW2 and DAC2 EN = 0) or (PW1 and RWTBL246 and DAC2 EN = 0)
Volatile
2
2
0
0
5
5
V
V
DAC2
DAC1
2
2
=
=
0
0
4
4
REFIN
REFIN
512
512
DAC1 VALUE
DAC2 VALUE
2
2
0
0
3
3
2
2
0
0
2
2
2
2
0
0
1
1
BIT 0
BIT 0
2
2
2
2
8
0
8
0
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