DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 33

• 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

The access codes represent the factory default values of PW_ENA and PW_ENB (Table 02h, Registers C0h–C1h).
Table 05h is empty by default. It can be configured to contain the alarm and warning-enable bytes from Table 01h,
Registers F8h–FFh with the MASK bit enabled (Table 02h, Register 89h). In this case Table 01h is empty.
Read
Access
Write
Access
ACCESS
80–C7
80–F7
80–9F
ROW
(hex)
ROW
(hex)
ROW
(hex)
CODE
A0
F8
<8>
<8>
<8>
<8>
ENABLE
separately
EMPTY
See each
NAME
NAME
NAME
ROW
ROW
ROW
bit/byte
ALARM
SFP+ Controller with Digital LDD Interface
LUT4
LUT6
LUT6
<0>
______________________________________________________________________________________
BYTE 0/8
BYTE 0/8
BYTE 0/8
APC REF
APC REF
ALARM
EMPTY
PW2
<1>
MOD
All
EN
3
WORD 0
WORD 0
WORD 0
<2>
N/A
All
BYTE 1/9
BYTE 1/9
BYTE 1/9
APC REF
APC REF
ALARM
EMPTY
MOD
EN
hardware
DS1874
All and
2
<3>
All
TABLE 04h (MODULATION LUT)
BYTE 2/A
BYTE 2/A
BYTE 2/A
APC REF
APC REF
ALARM
EMPTY
TABLE 06h (APC LUT)
MOD
PW2 +
EN
mode
PW2
<4>
bit
1
WORD 1
TABLE 05h
WORD 1
WORD 1
BYTE 3/B
BYTE 3/B
BYTE 3/B
APC REF
APC REF
<5>
All
All
ALARM
EMPTY
MOD
EN
0
<6>
N/A
All
WARN EN
RESERVED
BYTE 4/C
BYTE 4/C
BYTE 4/C
APC REF
EMPTY
MOD
PW1
PW1
<7>
WORD 2
WORD 2
WORD 2
3
WARN EN
RESERVED RESERVED
BYTE 5/D
BYTE 5/D
BYTE 5/D
APC REF
EMPTY
PW2
PW2
MOD
<8>
Table 05h Register Map
Table 06h Register Map
Table 04h Register Map
2
PW2
<9>
N/A
RESERVED
BYTE 6/E
BYTE 6/E
BYTE 6/E
APC REF
EMPTY
MOD
WORD 3
WORD 3
WORD 3
<10>
PW2
N/A
RESERVED
RESERVED
BYTE 7/F
BYTE 7/F
BYTE 7/F
APC REF
EMPTY
MOD
<11>
PW1
All
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