DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 43

• 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

Lower Memory, Register 71h: ALARM
71h
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
MEMORY TYPE
MON3 HI
BITS 3:1
BIT 7
BIT 7
BIT 6
BIT 5
BIT 4
BIT 0
SFP+ Controller with Digital LDD Interface
______________________________________________________________________________________
MON3 HI: High-alarm status for MON3 measurement. A TXD event does not clear this alarm.
0 = (Default) Last measurement was equal to or below threshold setting.
1 = Last measurement was above threshold setting.
MON3 LO: Low-alarm status for MON3 measurement. A TXD event does not clear this alarm.
0 = (Default) Last measurement was equal to or above threshold setting.
1 = Last measurement was below threshold setting.
MON4 HI: High-alarm status for MON4 measurement. A TXD event does not clear this alarm.
0 = (Default) Last measurement was equal to or below threshold setting.
1 = Last measurement was above threshold setting.
MON4 LO: Low-alarm status for MON4 measurement. A TXD event does not clear this alarm.
0 = (Default) Last measurement was equal to or above threshold setting.
1 = Last measurement was below threshold setting.
RESERVED
TXFINT: TXF Interrupt. This bit is the wire-ORed logic of all alarms and warnings wire-ANDed with their
corresponding enable bits in addition to nonmaskable alarms TXP HI, TXP LO, BIAS MAX, and HBAL. The
enable bits are found in Table 01h, Registers F8h–FFh.
MON3 LO
00h
All
N/A
Volatile
MON4 HI
2
MON4 LO
RESERVED
RESERVED
RESERVED
TXFINT
BIT 0
43