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STA1102R Folha de dados(PDF) 7 Page - STMicroelectronics

Nome de Peças STA1102R
Descrição Electrónicos  3 Gbps, 2 differential-pair channel eSATA signal re-driver
Download  18 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA1102R Folha de dados(HTML) 7 Page - STMicroelectronics

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STA1102R
Functional description
Doc ID 16470 Rev 5
7/18
3
Functional description
3.1
Equalizer
The adjustable input equalizer reduces system jitter and attenuation from long or lossy
cables. Shaping is performed by the gain stage of the equalizer to compensate the signal.
Note:
9 dB EQ is useful for signal recovery over long PCB track, e.g. 10” FR4.
3.2
Pre-emphasis
The STA1102R provides at each output a differential pair of 1-bit programmable pre-
emphasis to compensate for losses across long PCB tracks and interconnects after the re-
driver output. Below, the truth table of the pre-emphasis control is shown:
Table 3.
Input equalizer truth table
EN
E1
E2
Function
0x
x
Low power mode:
input stage disabled for minimum power consumption
100
Normal operation mode:
both CH1 and CH2 7dB EQ
101
Normal operation mode:
CH1 7dB EQ; CH2 9dB EQ
110
Normal operation mode:
CH1 9dB EQ; CH2 7dB EQ
111
Normal operation mode:
both CH1 and CH2 9dB EQ
Table 4.
Pre-emphasis truth table
EN
D1
D2
Functions
0xx
Low power mode:
output driver disabled; output driven to HiZ
10
0
Normal operation mode:
both CH1 and CH2 0 dB pre-emphasis
10
1
Normal operation mode:
CH1 0 dB pre-emphasis; CH2 2.5 dB pre-emphasis
11
0
Normal operation mode:
CH1 2.5 dB pre-emphasis; CH2 0 dB pre-emphasis
11
1
Normal operation mode:
both CH1 and CH2 2.5 dB pre-emphasis
Obsolete
Product(s)
- Obsolete
Product(s)


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