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Pericom Semiconductor Corporation

PI3EQX3851B Datasheet Preview

PI3EQX3851B Datasheet

1-port SATA2/SAS ReDriver

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Features
• SATA2 i, m; external SATA2
• Two 3.0Gbps differential signal pairs
• Adjustable Receiver Equalization
• 100-Ohm Differential CML I/O’s
• Independent Analog output swing adjustment
• Independent Analog Output Emphasis Control
• Input signal level detect and squelch for each channel
• OOB Support
• Low Power (200mW per Channel)
• Stand-by Mode – Power Down State
• VDD Operating Range: 3.3V
• Packaging:
20-TQFN (3.5x 4.5mm, ZH)
20-TQFN (4x 4mm, ZD)
Block Diagram
Signal Detection
PI3EQX3851B
3.3V, 1-port, SATA2 i/m ReDriver™
with Analog Output Adjustment
Description
Pericom Semiconductor’s PI3EQX3851B is a low power, signal
ReDriver. The device provides programmable equalization, to
optimize performance over a variety of physical mediums by
reducing Inter-Symbol Interference. PI3EQX3851B supports
two 100-Ohm Differential CML data I/O’s between the Protocol
ASIC to a switch fabric, across a backplane, or to extend the
signals across other distant data pathways on the user’s platform.
The integrated equalization circuitry provides exibility with
signal integrity of the signal before the ReDriver.
A low-level input signal detection and output squelch function
is provided for each channel. Each channel operates fully
independently. When the channels are enabled (CE=1) and
operating, that channels input signal level (on xI+/-) determines
whether the output is active. If the input signal level of the channel
falls below the active threshold level (Vth-) then the outputs are
driven to the common mode voltage.
In addition to signal conditioning, when CE = 0, the device
enters a low power standby mode.
Pin Diagram (Top Side View)
3.5x4.5mm (ZH)
A_EQ
AI+
AI-
DNC
VDD33
BO-
BO+
B_EM
1 20
2 19
3 18
4 17
5
GND
16
6 15
7 14
8 13
9 12
10 11
A_EM
AO+
AO-
VDD33
DNC
BI-
BI+
B_EQ
CML
XI+
XI
x_EQ
CE
Equalizer
Limiting
Amp
- Repeated 2 times -
Power
Management
08-0252
ReDriver is a trademark of Pericom Semiconductor.
CML
XO+
XO
x_EM
x_OS
4x4mm (ZD)
AI+
AI-
VDD33
BO-
BO+
20 19 18 17 16
1 15
2 14
3 GND 13
4 12
5 11
6 7 8 9 10
AO+
AO-
VDD33
BI-
BI+
1
PS9009A
04/03/09




Pericom Semiconductor Corporation

PI3EQX3851B Datasheet Preview

PI3EQX3851B Datasheet

1-port SATA2/SAS ReDriver

No Preview Available !

www.DataSheet4U.com
PI3EQX3851B
3.3V, 1-Port, SATA2 i/m ReDriver™
with Analog Output Adjustment
Pin Description
ZD Pin # ZH Pin # Pin Name
16 19 A_EM
20 2 A_EQ0
19 - A_EQ1
17 20 A_OS
13
24
15 18
14 17
69
10 12
9-
7 10
11 13
12 14
58
47
8 11
18, Cen- 1, Center
ter Pad
Pad
3, 13
6, 16
- 5, 15
AI+
AI-
AO+
AO-
B_EM
B_EQ0
B_EQ1
B_OS
BI+
BI-
BO+
BO-
CE
GND
VDD33
DNC
Type
Input
Input
Input
Input
Output
Input
Input
Input
Input
Output
Input
GND
Power
-
Description
Output emphasis adjustment for channel A. Connects to resistor (tied to ground)
to allow ne adjustment of emphasis level. (See Output Adjustment table.)
Selection pin(s) for equalizer of AI±, See Input Equalizer Adjustment table. With
internal 50K-Ohm pull-up resistor.
Output swing adjustment for channel A. Connects to resistor (tied to ground)
to allow ne adjustment of output swing level. (See Output Swing Adjustment
Table.)
CML input forward channel A. With internal 50-Ohm pull up, connected to inter-
nal bias voltage.
CML output channel A. With internal 50-Ohm pull up, connected to internal bias
voltage.
Output emphasis adjustment for channel B. Connects to resistor (tied to ground)
to allow ne adjustment of emphasis level. (See Output Adjustment table.)
Selection pin(s) for equalizer of BI±. See Input equalizer Adjustment table. With
internal 50K-Ohm pull-up resistor.
Output swing adjustment for channel B. Connects to resistor (tied to ground) to
allow ne adjustment of output swing level. (See Output Adjustment Table.)
CML input return channel B. With internal 50-Ohm pull up, connected to internal
bias voltage.
Positive CML output channel B. With internal 50-Ohm pull up, connected to
internal bias voltage.
Chip Enable "high" provides normal operation. "Low" for power down mode.
With internal 50K-Ohm pull-up resistor.
Supply ground.
3.3V supply voltage ± 10%. Place 100nF and 1nF bypass capacitors to ground,
as close to the device as possible.
Do Not Connect
Input Equalizer Adjustment (ZH)
x_EQ
Compliance Channel @ 1.5 GHz
0 3.5dB ± 1.0dB
1 7.5dB ± 1.0dB
Input Equalizer Adjustment (ZD)
x_EQ1 x_EQ0 Compliance Channel @ 1.5 GHz
00
3.5dB ± 1.0dB
01
4.5dB ± 1.0dB
10
6.5dB ± 1.0dB
11
7.5dB ± 1.0dB
08-0252
ReDriver is a trademark of Pericom Semiconductor.
2
PS9009A
04/03/09


Part Number PI3EQX3851B
Description 1-port SATA2/SAS ReDriver
Maker Pericom Semiconductor Corporation
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