DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 32

• 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

SFP+ Controller with Digital LDD Interface
* The final result must be XORed with BB40h before writing to this register.
32
D8–E7
Read
Access
Write
Access
ACCESS
ROW
(hex)
A0
A8
B0
B8
C0
C8
D0
80
88
90
98
E8
F8
F0
CODE
______________________________________________________________________________________
<9>
<8>
<0>
<8>
<8>
<8>
<8>
<8>
<8>
CONFIG
CONFIG
CONFIG
PWD VALUE
THRESHOLD
<8>
ENABLE
<0>
EMPTY
<8>
<8>
<0>
NAME
separately
CONFIG
CONFIG
OFFSET
OFFSET
ROW
SCALE
SCALE
See each
HI BIAS
LUT
bit/byte
PWD
APC
3W
3W
3W
<0>
0
1
2
0
1
0
1
0
1
<8>
RANGING
BYTE 0/8
<8>
RXCTRL1
SETTXDE
SAMPLE
PW_ENA
HBATH
PW2
EMPTY
MON3 FINE OFFSET
<1>
RATE
MON3 FINE SCALE
All
3WCTRL
LOS
MODE
<4>
RESERVED
RESERVED
PW1 MSW
WORD 0
MAN BIAS
<2>
N/A
All
<8>
<4>
RESERVED
RANGING
BYTE 1/9
RXCTRL2
PW_ENB
CNFGA
HBATH
EMPTY
COMP
ADDRESS
TINDEX
hardware
DS1874
All and
<3>
All
RESERVED
RESERVED
<8>
BYTE 2/A
<4>
SETCML
CNFGB
HBATH
MODTI
EMPTY
CNTL
PW2 +
<4>
mode
WRITE
MAN_
PW2
<4>
MON4 OFFSET
MON4 SCALE
bit
V
V
MODULATION
REGISTER
CC
PW1 LSW
TABLE 02h
WORD 1
CC
OFFSET
SCALE
RESERVED RESERVED
<10>
BYTE 3/B
<5>
All
All
SETLOS
CNFGC
DAC1TI
HBATH
<10>
EMPTY
ISTEP
READ
BIAS REGISTER
<6>
N/A
All
<10>
MON3 COARSE OFFSET
BYTE 4/C
ADDRESS
MON3 COARSE SCALE
TXCTRL
DEVICE
DAC2TI
HBATH
EMPTY
HTXP
TXSTAT1
<4>
MON1 OFFSET
MON1 SCALE
PW1
PW1
<7>
PW2 MSW
DAC1 VALUE
WORD 2
<10>
RESERVED
RESERVED
RESERVED RESERVED
IMODMAX
BYTE 5/D
<4>
HBATH
EMPTY
PW2
PW2
LTXP
<8>
DAC
TXSTAT2 RESERVED
Table 02h Register Map
APC
PW2
<9>
N/A
<10>
IBIASMAX
BYTE 6/E
RSHIFT
HBATH
LUTTC
EMPTY
HLOS
INTERNAL TEMP
<4>
DEVICE
ID
MON2 OFFSET
MON2 SCALE
RESERVED
DAC2 VALUE
PW2 LSW
WORD 3
OFFSET*
<10>
1
PW2
N/A
<10>
SETPWCTRL
TBLSELPON
RESERVED
RESERVED
BYTE 7/F
RSHIFT
HBATH
EMPTY
LLOS
VER
DEVICE
<11>
PW1
All
0