DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 42

• 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 70h: ALARM
42
70h
______________________________________________________________________________________
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
MEMORY TYPE
TEMP HI
BIT 7
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
TEMP HI: High-alarm status for temperature measurement.
0 = (Default) Last measurement was equal to or below threshold setting.
1 = Last measurement was above threshold setting.
TEMP LO: Low-alarm status for temperature measurement.
0 = (Default) Last measurement was equal to or above threshold setting.
1 = Last measurement was below threshold setting.
VCC HI: High-alarm status for V
0 = (Default) Last measurement was equal to or below threshold setting.
1 = Last measurement was above threshold setting.
VCC LO: Low-alarm status for V
point value. It clears itself when a V
0 = Last measurement was equal to or above threshold setting.
1 = (Default) Last measurement was below threshold setting.
MON1 HI: High-alarm status for MON1 measurement.
0 = (Default) Last measurement was equal to or below threshold setting.
1 = Last measurement was above threshold setting.
MON1 LO: Low-alarm status for MON1 measurement.
0 = (Default) Last measurement was equal to or above threshold setting.
1 = Last measurement was below threshold setting.
MON2 HI: High-alarm status for MON2 measurement.
0 = (Default) Last measurement was equal to or below threshold setting.
1 = Last measurement was above threshold setting.
MON2 LO: Low-alarm status for MON2 measurement.
0 = (Default) Last measurement was equal to or above threshold setting.
1 = Last measurement was below threshold setting.
TEMP LO
10h
All
N/A
Volatile
VCC HI
3
CC
CC
VCC LO
measurement.
CC
measurement. This bit is set when the V
measurement is completed and the value is above the low threshold.
MON1 HI
MON1 LO
CC
supply is below the POA trip
MON2 HI
MON2 LO
BIT 0