DS100BR111A Datasheet, PDF (13/35 Pages) Texas Instruments – Ultra Low Power 10.3 Gbps 2-Channel Repeaters with Input Equalization and Output De-Emphasis

Table 4: De-emphasis and Output Voltage Settings
Level VOD_SEL DEMA/B
1
0
2
0
3
0
4
0
5
Float
6
Float
7
Float
8
Float
9
R
10
R
11
R
12
R
13
1
14
1
15
1
16
1
0
Float
R
1
0
Float
R
1
0
Float
R
1
0
Float
R
1
SMBus Register DEM Level
000
010
011
101
000
010
011
101
000
010
011
101
000
001
001
010
SMBus Register VOD
Level
000
000
000
000
011
011
011
011
101
101
101
101
100
100
110
110
VOD (mV)
575
575
575
575
850
850
850
850
1050
1050
1050
1050
950
950
1150
1150
DEM (dB)
0
- 3.5
-6
-9
0
- 3.5
-6
-9
-0
- 3.5
-6
-9
0
- 1.5
- 1.5
- 3.5
Note: Below 850mV output setting De-emphasis gain is reduced.
Note: The DS100BR111A VOD for OUTPUT A is limited to 575 mV in pin mode (ENSMB=0). With ENSMB = 1 or FLOAT, the VOD
for OUTPUT A can be adjusted with SMBus register 0x23 [4:2] as shown in the SMBus Register Table.
Note: In SMBus Mode if VOD_SEL is in the Logic 1 state (1K resistor to VIN/VDD) the DS100BR111A AD0-AD3 pins are internally
forced to 0'h
Table 5: Signal Detect Threshold Level
SD_TH
SMBus REG bit
[3:2] and [1:0]
Assert Level (Typical)
0
10
210 mV
20K to GND
01
160 mV
Float (Default)
00
180 mV
1
11
190 mV
Note: VDD = 2.5V, 25°C, and 010101 pattern at 10 Gbps
De-assert Level (Typical)
150 mV
100 mV
110 mV
130 mV
13
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