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Pericom Semiconductor Corporation

PI2EQX3431 Datasheet Preview

PI2EQX3431 Datasheet

SATA2/SAS Re-Driver

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Features
• Two 3.2Gbps differential signal pairs
• Adjustable Receiver Equalization
• 100-Ohm Differential CML I/O’s
• Independent Output Level Control
• Input signal level detect and squelch for each channel
• OOB Support
• Low Power (100mW per Channel)
• Stand-by Mode – Power Down State
• VCC Operating Range: 1.8V ±0.1V
• Packaging: — 20-TQFN (3.5x 4.5mm)
PI2EQX3431
3.2Gbps, 1-port, SATA2/SAS Re-Driver
Description
Pericom Semiconductor’s PI2EQX3431 is a low power, signal
Re-Driver. The device provides programmable equalization,
to optimize performance over a variety of physical mediums
by reducing Inter-Symbol Interference. PI2EQX3431 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 re-driver.
A low-level input signal detection and output squelch function
is provided for each channel. Each channel operates fully
independantly. When the channels are enabled (CE=1) and
operating, that channels input signal level (on xIN+/-) 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.
Block Diagram
Signal Detection
CML
x_IN+
x_IN
x_EQ
CE
Equalizer
Limiting
Amp
- Repeated 2 times -
Power
Management
Pin Description (Top Side View)
x_SD
CML
x_OUT+
x_OUT–
S_ES
F_SD
1 20
2 19
VDD
3
18
F_IN+ 4
17
F_IN-
VDD
R_OUT+
5
6
7
GND
16
15
14
R_OUT-
8
13
R_SD
9 12
10 11
CE
VDD
F_OUT+
F_OUT-
VDD
R_IN+
R_IN-
NC
08-0094
1
PS8950A
04/30/08




Pericom Semiconductor Corporation

PI2EQX3431 Datasheet Preview

PI2EQX3431 Datasheet

SATA2/SAS Re-Driver

No Preview Available !

www.DataSheet4U.com
Pin Description
Pin #
Pin Name
19 CE
1 F_EQ
20
2
17
16
4
5
Center Pad
12
10
14
13
9
7
8
11
3,6,15,18
F_ES
F_SD
F_OUT+
F_OUT-
F_IN+
F_IN-
GND
NC
R_EQ
R_IN+
R_IN-
R_SD
R_OUT+
R_OUT-
R_ES
VDD
PI2EQX3431
3.2 Gbps, 1-Port, SATA2 /SAS Re-Driver
Type
Input
Input
Input
Output
Output
Description
Chip Enable "high" provides normal operation. "Low" for power down mode.
With internal 50K-Ohm pull-up resistor.
Selection pin for equalizer of Fin. "Low" means 2.5dB, "high" means 6.5dB.
With internal 50K-Ohm pull-up resistor.
F-Channel external SATA. When logic 1, operates to the SATA i/m standard.
When low, operates to SATAx/SAS. With internal 50K-ohm pull-up resistor.
Channel Fin Signal detector output. Provides "high" when a signal is detected.
CML output channel F with internal 50-Ohm pull up.
Input
GND
-
Input
Input
Output
Output
Input
Power
CML input channel F with internal 50-Ohm pull down.
Supply ground.
Do not connect
Selection pin for equalizer of R_IN. "Low" means 2.5dB, "high" means 6.5dB.
With internal 50K-Ohm pull-up resistor.
CML input channel R with internal 50-Ohm pull down.
Signal detector for Channel R_IN. Provides "high" when signal is detected.
Positive CML output channel R with internal 50-Ohm pull up.
R-channel External SATA "High" operates to the SATA i/m standard. "Low"
means SATAx/SAS standard. With internal 50K-Ohm pull-up resistor.
1.8V supply Voltage.
Equalizer Selection
x_EQ
0
1
Output CML Buffer
CE
0
1
1
Compliance Channel
[0:2.5dB] @ 1.6 GHz
[4.5:6.5dB] @ 1.6 GHz
x_ES
X
0
1
Common mode voltage
VDD
VDD-0.6V
VDD-0.3V
Output Operation
VDD
1200mV Swing
600mV Swing
08-0094
2
PS8960A
04/30/08


Part Number PI2EQX3431
Description SATA2/SAS Re-Driver
Maker Pericom Semiconductor Corporation
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