DS1874T+ Maxim Integrated Products, DS1874T+ Datasheet - Page 40

• 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 6Eh: STATUS
40
Write Access
______________________________________________________________________________________
6Eh
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
MEMORY TYPE
TXDS
BIT 7
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
N/A
TXDS: TXD Status Bit. Reflects the logic state of the TXD pin (read only).
0 = TXD pin is logic-low.
1 = TXD pin is logic-high.
TXDC: TXD Software Control Bit. This bit allows for software control that is identical to the TXD pin.
See the section on TXD for further information. Its value is wire-ORed with the logic value of the
TXD pin (writable by all users).
0 = (Default).
1 = Forces the device into a TXD state regardless of the value of the TXD pin.
IN1S: IN1 Status Bit. Reflects the logic state of the IN1 pin (read only).
0 = IN1 pin is logic-low.
1 = IN1 pin is logic-high.
RSELS: RSEL Status Bit. Reflects the logic state of the RSEL pin (read only).
0 = RSEL pin is logic-low.
1 = RSEL pin is logic-high.
RSELC: RSEL Software Control Bit. This bit allows for software control that is identical to the RSEL
pin. Its value is wire-ORed with the logic value of the RSEL pin to create the RSELOUT pin’s logic
value (writable by all users).
0 = (Default).
1 = Forces the device into a RSEL state regardless of the value of the RSEL pin.
TXF: Reflects the driven state of the TXF pin (read only).
0 = TXF pin is driven low.
1 = TXF pin is pulled high.
RXL: Reflects the driven state of the LOSOUT pin (read only).
0 = LOSOUT pin is driven low.
1 = LOSOUT pin is pulled high.
RDYB: Ready Bar.
0 = V
1 = V
TXDC
All
CC
CC
is above POA.
is below POA and/or too low to communicate over the I
X0XX 0XXXb
All
See below
Volatile
IN1S
N/A
RSELS
All
RSELC
All
N/A
TXF
2
C bus.
RXL
N/A
RDYB
BIT 0
N/A