1FEATURES

2• Quad lane bi-directional repeater up to 6.4

Gbps rate

• Signal conditioning on input and output for

extended reach

• Adjustable receive equalization up to +33 dB

gain

• Adjustable transmit de-emphasis up to −12 dB

• Adjustable transmit VOD (600 mVp-p to 1200

mVp-p)

• <0.25 UI of residual DJ at 6.4 Gbps with 40”

FR4 trace

• Automatic de-emphasis scaling based on rate

detect

• SATA/SAS: OOB signal pass-through,

– <3 ns (typ) envelope distortion

• Adjustable electrical IDLE detect threshold

• Low power (100 mW/channel), per-channel

power down

• Programmable via pin selection or SMBus

interface

• Single supply operation at 2.5V ±5% de•

>6 kV HBM ESD Rating

• 3.3V LVCMOS input tolerant for SMBus

interface

• High speed signal flow–thru pinout package:

54-pin WQFN (10 mm x 5.5 mm)

APPLICATIONS

• SATA (1.5, 3.0 and 6 Gbps)

• SAS (1.5, 3.0 and 6 Gbps)

• XAUI (3.125 Gbps), RXAUI (6.25 Gbps)

• sRIO – Serial Rapid I/O

• Fibre Channel (4.25 Gbps)

• 10GBase-CX4, InfiniBand 4x (SDR & DDR)

• QSFP active copper cable modules

• High-speed active cable and FR-4 backplane

traces

DESCRIPTION

The DS64BR401 is a quad lane bi-directional signal

conditioning repeater for 6.0/3.0/1.5 Gbps SATA/SAS

and other high-speed bus applications with data rates

up to 6.4 Gbps. The device performs both receive

equalization and transmit de-emphasis on each of its

8 channels to compensate for channel loss, allowing

maximum flexibility of physical placement within a

system. The receiver's continuous time linear

equalizer (CTLE) provides a boost of up to +33 dB at

3 GHz and is capable of opening an input eye that is

completely closed due to inter-symbol interference

(ISI) induced by the interconnect medium. The

transmitter features a programmable output deemphasis

driver and allows amplitude voltage levels

to be selected from 600 mVp-p to 1200 mVp-p to suit

multiple application scenarios. This Low Power

Differential Signaling (LPDS) output driver is a power

efficient implementation that maintains compatibility

with AC coupled CML receiver. The programmable

settings can be applied via pin settings or SMBus

interface.

To enable seamless upgrade from SAS/SATA 3.0

Gbps to 6.0 Gbps data rates without compromising

physical reach, DS64BR401 automatically detects the

incoming data rate and selects the optimal de•

emphasis pulse width. The device detects the out-ofband

(OOB) idle and active signals of the SAS/SATA

specification and passes through with minimum signal

distortion.

With a typical power consumption of 200 mW/lane

(100 mW/channel) at 6.4 Gbps, and control to turn-off

unused channels, the DS64BR401 is part of Texas

Instruments' PowerWise family of energy efficient

devices.