DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 76

• 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 CBh–CCh: BIAS REGISTER
SFP+ Controller with Digital LDD Interface
Table 02h, Register CDh: APC DAC
Table 02h, Register CEh: DEVICE ID
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CCh
CBh
CDh
CEh
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
The digital value used for BIAS and resolved from the APC. This register is updated after each decision of the
APC loop.
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
The digital value used for APC reference and recalled from Table 06h 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
Hardwired connections to show the device ID.
RESERVED
BIT 7
BIT 7
BIT 7
2
2
0
7
7
RESERVED
2
2
1
6
6
0000h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
N/A
Volatile
RESERVED
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
(PW2 and APC EN = 0) or (PW1 and RWTBL246 and APC EN = 0)
Volatile
74h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
N/A
ROM
2
2
1
5
5
RESERVED
2
2
1
4
4
RESERVED
2
2
0
3
3
RESERVED
2
2
1
2
2
RESERVED
2
2
0
1
1
BIT 0
BIT 0
BIT 0
2
2
2
0
8
0
0