DS1875T+ Maxim Integrated Products, DS1875T+ Datasheet - Page 47

• Manufacturer Part Number: DS1875T+
• Description: IC SFP CTRLR/TRIPLEXER 38-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of DS1875T+

• Applications: Fiber Optics
• Interface: I²C
• Voltage - Supply: 2.85 V ~ 3.9 V
• Package / Case: *
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Lower Memory, Register 6Eh: STATUS
Access
Write
6Eh
POWER-ON VALUE
READ ACCESS
WRITE ACCESS
MEMORY TYPE
STATUS
FETG
BIT 7
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
______________________________________________________________________________________
N/A
FETG STATUS: Reflects the active state of FETG. The FETG DIR bit in Table 02h, Register 89h
defines the polarity of FETG.
0 = Normal operation. Bias and modulation outputs are enabled.
1 = The FETG output is active. Bias and modulation outputs are disabled.
SOFT FETG:
0 = (Default)
1 = Forces the bias and modulation outputs to their off state and assert the FETG output.
RESERVED (Default = 0)
TX-F RESET:
0 = (Default)
1 = Resets the latch for the TX-F output. This bit is self-clearing after resetting TX-F.
SOFT TX-D: This bit allows a software control that is identical to the TX-D pin. See the BIAS and
MOD Output as a Function of Transmit Disable (TX-D) section for further information. Its value is
wired-ORed with the logic value of the TX-D pin.
0 = Internal TX-D signal is equal to the external TX-D pin.
1 = Internal TX-D signal is high.
TX-F STATUS: Reflects the active state of the TX-F pin.
0 = TX-F pin is not active.
1 = TX-F pin is active.
LOS STATUS: Loss of Signal. Reflects the logic level of the LOSI input pin.
0 = LOSI is logic-low.
1 = LOSI is logic-high.
RDBY: Ready Bar.
0 = V
1 = V
SOFT
FETG
All
CC
CC
PON Triplexer and SFP Controller
is above POA.
is below POA and/or too low to communicate over the I
X000 0XXXb
All
See below
Volatile
RESERVED
N/A
RESET
TX-F
All
SOFT
TX-D
All
STATUS
TX-F
N/A
2
C bus.
STATUS
LOS
N/A
RDYB
BIT 0
N/A
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