DS1877T+ Maxim Integrated Products, DS1877T+ Datasheet - Page 59

• Manufacturer Part Number: DS1877T+
• Description: IC CTLR/MON SFP 1-2CH 28TQFN
• Manufacturer: Maxim Integrated Products
• Type: SFP+ Controllerr

Specifications of DS1877T+

• Input Type: Logic
• Output Type: Logic
• Interface: I²C
• Current - Supply: 2.5mA
• Mounting Type: Surface Mount
• Package / Case: 28-WFQFN exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 90-1877T+000

Table 02h, Register C2h–C5h: RESERVED
Table 02h, Register C6h: POLARITY
C6h
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
A2h AND B2h MEMORY
MEMORY TYPE
RESERVED
BITS 7:4,
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
A2h AND B2h MEMORY
MEMORY TYPE
These registers are reserved.
BIT 7
BIT 3
BIT 1
2, 0
RESERVED
DAC2P: DAC2 VALUE polarity. The DAC2 VALUE (Table 02h, Registers C8h–C9h) range is
000h–3FFh. A setting of 000h creates a pulse-density of zero and 3FFh creates a pulse-density of
1023/1024. This polarity bit allows the user to use GND or V
of DAC2 VALUE is 000h; thus an application that needs V
inverted polarity.
0 = Normal polarity. A setting of 000h results in a pulse-density output of zero held at GND, and a
setting of 3FFh results in a pulsed-density output of 1023/1024 held mostly at V
1 = Inverted polarity. A setting of 000h results in a pulse-density output of zero held at V
a setting of 3FFh results in a pulsed-density output of 1023/1024 held mostly at GND.
DAC1P: DAC1 VALUE polarity. The DAC1 VALUE (Table 02h, Registers CCh–CDh) range is
000h–3FFh. A setting of 000h creates a pulse-density of zero and 3FFh creates a pulse-density of
1023/1024. This polarity bit allows the user to use GND or V
of DAC1 VALUE is 000h; thus an application that needs V
inverted polarity.
0 = Normal polarity. A setting of 000h results in a pulse-density output of zero held at GND, and a
setting of 3FFh results in a pulsed-density output of 1023/1024 held mostly at V
1 = Inverted polarity. A setting of 000h results in a pulse-density output of zero held at V
a setting of 3FFh results in a pulsed-density output of 1023/1024 held mostly at GND.
RESERVED
SFP Controller for Dual Rx Interface
0Ah
PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
PW2 or (PW1 and RWTBL2)
Common A2h and B2h memory locations
Nonvolatile (SEE)
RESERVED
00h
N/A
N/A
N/A
N/A
RESERVED
DAC2P
REFIN
REFIN
RESERVED
REFIN
REFIN
to be the off state should use the
to be the off state should use the
as the reference. The power-on
as the reference. The power-on
DAC1P
REFIN
REFIN
.
.
RESERVED
REFIN,
REFIN,
BIT 0
and
and
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