Datasheet
Transmitter Device
Main Board/Backplane
LVCP600S
SAS Receptacle
SAS Drive Plug
IR
Compliance Point (IR)
signal going to receiver device
as measured at this point
SAS Mode
SN75LVCP600S
www.ti.com
SLLSE81 –MARCH 2011
Figure 5. Compliance Point In SAS Mode
AUTO LOW POWER (ALP) MODE (see Figure 10)
As a redriver, the SN75LVCP600S does not participate in SATA or SAS link power management (PM) states.
However, the redriver tracks link-power management mode (Partial and Slumber) by relying on the link
differential voltage, V
IDp-p
. The SATA/SAS link is continuously sending and receiving data even in long periods of
disk inactivity by sending SYNC primitives (logical idle), except when the link enters Partial or Slumber mode. In
these modes the link is in an electrical-idle state (EID). The device input squelch detector tracks EID status.
When the input signal is in the electrical idle state, i.e. V
IDp-p
<VOOB_SATA/VOOB_SAS and stays in this state
for > 10µS, the device automatically enters the low power state. In this state, the output is driven to V
CM
and the
device selectively shuts off internal circuitry to lower power consumption by ~90% of its normal operating power.
While in ALP mode, the device continues to actively monitor input signal levels; when the input signal exceeds
the SATA/SAS OOB upper threshold level, the device reverts to active state. Exit time from auto low power mode
is <50ns (MAX).
OUT-OF-BAND (OOB) SUPPORT
The squelch detector circuit within the device enables full detection of OOB signaling as specified in the SATA
and SAS specifications. Selection of squelch threshold level is made automatically based on the state of MODE
pin, SATA or SAS. Squelch circuit ON/OFF time is 8ns max. While in squelch mode, outputs are held to V
CM
.
DEVICE POWER
The SN75LVCP600S is designed to operate from a single 3.3V supply. Always practice proper power supply
sequencing procedure. Apply V
CC
first before any input signals are applied to the device. The power down
sequence is in reverse order.
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range (unless otherwise noted)
(1)
VALUE UNIT
Supply voltage range
(2)
V
CC
–0.5 to 4 V
Voltage range Differential I/O –0.5 to 4 V
Control I/O –0.5 to V
CC
+ 0.5 V
Electrostatic discharge Human body model
(3)
±9000 V
Charged-device model
(4)
±1500 V
Machine model
(5)
±200 V
Continuous power dissipation See Dissipation Rating Table
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only and functional operation of the device at these or any conditions beyond those indicated under recommended operating conditions
is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values, except differential voltages, are with respect to network ground terminal.
(3) Tested in accordance with JEDEC Standard 22, Test Method A114-B.
(4) Tested in accordance with JEDEC Standard 22, Test Method C101-A.
(5) Tested in accordance with JEDEC Standard 22, Test Method A115-A.
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