DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 44

• 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
Lower Memory, Register 72h: ALARM
Lower Memory, Register 73h: ALARM
44
73h
72h
______________________________________________________________________________________
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
MEMORY TYPE
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
MEMORY TYPE
RESERVED
BITS 5:4
BITS 2:0
BITS 7:4
LOS HI
BIT 7
BIT 7
BIT 6
BIT 3
BIT 7
BIT 3
BIT 2
BIT 1
BIT 0
LOS HI: High-Alarm Status for MON3; Fast Comparison. A TXD event does not clear this alarm.
0 = (Default) Last comparison was below threshold setting.
1 = Last comparison was above threshold setting.
LOS LO: Low-Alarm Status for MON3; Fast Comparison. A TXD event does not clear this alarm.
0 = (Default) Last comparison was above threshold setting.
1 = Last comparison was below threshold setting.
RESERVED
BIAS MAX: Alarm status for maximum digital setting of BIAS. A TXD event clears this alarm.
0 = (Default) The value for BIAS is equal to or below the IBIASMAX register.
1 = Requested value for BIAS is greater than the IBIASMAX register.
RESERVED
RESERVED
HBAL: High-Bias Alarm Status; Fast Comparison. A TXD event clears this alarm.
0 = (Default) Last comparison was below threshold setting.
1 = Last comparison was above threshold setting.
RESERVED
TXP HI: High-Alarm Status TXP; Fast Comparison. A TXD event clears this alarm.
0 = (Default) Last comparison was below threshold setting.
1 = Last comparison was above threshold setting.
TXP LO: Low-Alarm Status TXP; Fast Comparison. A TXD event clears this alarm.
0 = (Default) Last comparison was above threshold setting.
1 = Last comparison was below threshold setting.
RESERVED
LOS LO
00h
All
N/A
Volatile
00h
All
N/A
Volatile
RESERVED
RESERVED
1
0
RESERVED
RESERVED
BIAS MAX
HBAL
RESERVED
RESERVED
RESERVED
TXP HI
RESERVED
TXP LO
BIT 0
BIT 0