MAX4951CCTP+T Maxim Integrated, MAX4951CCTP+T Datasheet - Page 9

• Manufacturer Part Number: MAX4951CCTP+T
• Description: Buffers & Line Drivers 6Gbps SATA Bidirecti onal Redriver with I
• Manufacturer: Maxim Integrated

Specifications of MAX4951CCTP+T

• Rohs: yes
• Number Of Input Lines: /
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V

The device features an active-low, cable-detect input
(CAD) for use in external SATA applications. CAD has
an internal 390kI (typ) pullup resistor. Drive CAD high
or leave uncon nected to place the device into low-power
standby mode. In this mode, the buffers are disabled,
reducing supply current to 20FA (typ). This signal is
normally driven low by inserting an internal SATA cable
into a properly wired socket (see the
Circuit). If the cable-detect feature is not desired, con-
nect CAD to GND.
The device features a dynamic power-down mode where
the device shuts down the major power consuming cir-
cuitry. The device detects if the input signal is not present
for a 4Fs (typ) duration. Normal operation resumes after
20ns (max) when a signal above the OOB threshold level
is detected at the input. This function is implemented
separately for both channels. The output common mode
remains virtually unchanged when entering or exiting
Figure 1. Typical Application Circuit for Internal SATA Applications
6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power Management
CONTROLLER
SATA HOST
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Dynamic Power-Down Mode
Rx
Tx
10nF (X7R)
10nF (X7R)
10nF (X7R)
10nF (X7R)
Cable-Detect Input
AINP
AINM
BOUTM
BOUTP
Typical Operating
MODE
GPIO
+3.3V
V
GPIO
CC
EN
MAX4951C
PA
1µF
V
PB
CC
0.01µF
AOUTM
AOUTP
GND
BINM
BINP
CAD
dynamic power-down mode, making the device ideal for
internal SATA applications.
The device has two preemphasis control-logic inputs, PA
and PB. PA and PB have internal 390kI (typ) pulldown
resistors. PA and PB enable preemphasis to the out-
puts of their corresponding buffers (see the
Diagram/Truth
unconnected for standard SATA output levels. Drive PA
or PB high to provide preemphasis to the output. The
preemphasis output signal compensates for attenua-
tion from longer trace lengths or to meet internal SATA
specifications.
Figure 1
to drive an internal SATA device. Set PB high and PA low
for applications with board losses < 3dB between the
MAX4951C and the connector.
10nF (X7R)
10nF (X7R)
10nF (X7R)
10nF (X7R)
Output Preemphasis Selection Inputs
shows a typical application with the device used
1
2
3
4
5
6
7
Table). Drive PA or PB low or leave
Rx
Tx
CONNECTOR
Applications Information
INTERNAL
DEVICE
SATA
MAX4951C
SOLID-STATE
HARD DRIVE/
DRIVE
Functional