DS1875T+ Maxim Integrated Products, DS1875T+ Datasheet - Page 69

• 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

Table 02h, Register 8Dh: COMP RANGING
8Dh
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
The upper nibble of this byte controls the full-scale range of the quick-trip monitoring for BIAS. The lower nibble
of this byte controls the full-scale range for the quick-trip monitoring of the APC reference as well as the closed-
loop monitoring of APC.
RESERVED
BITS 6:4
BITS 2:0
BIT 7
BIT 3
BIT 7
______________________________________________________________________________________
RESERVED (Default = 0)
BIAS[2:0] BIAS Full-Scale Ranging. 3-bit value to select the FS comparison voltage for BIAS found
on MON1. Default is 000b and creates a FS of 1.25V.
RESERVED (Default = 0)
APC[2:0] APC Full-Scale Ranging. 3-bit value to select the FS comparison voltage for BMD with
the APC. Default is 000b and creates a FS of 2.5V.
BIAS
2
PON Triplexer and SFP Controller
00h
PW2
PW2
Nonvolatile (SEE)
BIAS
BIAS[2:0]
APC[2:0]
000b
001b
010b
011b
100b
101b
110b
111b
000b
001b
010b
011b
100b
101b
110b
111b
1
BIAS
0
% OF 1.25V
% OF 2.50V
RESERVED
100.00
100.00
80.04
66.73
50.10
40.11
33.45
28.69
25.12
80.04
66.73
50.10
40.11
33.45
28.69
25.12
APC
FS VOLTAGE (V)
FS VOLTAGE (V)
2
1.250
1.001
0.834
0.626
0.501
0.418
0.359
0.314
1.250
1.001
0.834
0.626
0.501
0.418
0.359
0.314
APC
1
APC
BIT 0
0
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