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DESCRIPTION

APPLICATIONS

FUNCTIONAL DIAGRAM

1.5 Gbps

Horizontal Scale= 200 ps/div

Vertical Scale=200 mV/div

EYE PATTERNS OF OUTPUTS

OPERATING SIMULTANEOUSLY

MUX

1DE

1A

1B

S0

S1

2A

2B

2DE

1Y

1Z

2Y

2Z

Integrated Termination on SN65LVDT122 Only

OUTPUT 1

OUTPUT 2

110

Ω

110

Ω

SN65LVDS122

SN65LVDT122

SLLS525B – MAY 2002 – REVISED JUNE 2004

1.5-Gbps 2

× 2 LVDS CROSSPOINT SWITCH

•

The

SN65LVDS122

and

SN65LVDT122

are

1.5 Gbps

crosspoint switches that use low voltage differential

signaling (LVDS) to achieve signaling rates as high

•

Total Jitter < 65 ps

as 1.5 Gbps. They are pin-compatible speed up-

•

Pin-Compatible With SN65LVDS22 and

grades to the SN65LVDS22 and SN65LVDM22. The

SN65LVDM22

internal signal paths maintain differential signaling for

•

25 mV of Receiver Input Threshold Hysteresis

high speeds and low signal skews. These devices

Over 0-V to 4-V Common-Mode Range

have a 0-V to 4-V common-mode input range that

accepts LVDS, LVPECL, or CML inputs. Two logic

•

Inputs Electrically Compatible With CML,

pins (S0 and S1) set the internal configuration be-

LVPECL and LVDS Signal Levels

tween the differential inputs and outputs. This allows

•

Propagation Delay Times, 900 ps Maximum

the flexibility to perform the following configurations:

•

LVDT Integrates 110-

Ω Terminating Resistor

2 x 2 crosspoint switch, 2:1 input multiplexer, 1:2

splitter or dual repeater/translator within a single

•

Offered in SOIC and TSSOP

device. Additionally, SN65LVDT122 incorporates a

110-

Ω termination resistor for those applications

where board space is a premium. Although these

•

10-G (OC-192) Optical Modules

devices are designed for 1.5 Gbps, some applications

•

622-MHz Central Office Clock Distribution

at a 2-Gbps data rate can be supported depending on

loading and signal quality.

•

Wireless Basestations

•

Low Jitter Clock Repeater/Multiplexer

The intended application of this device is ideal for

loopback switching for diagnostic routines, fanout

•

Protection Switching for Serial Backplanes

buffering of clock/data distribution provide protection

in fault-tolerant systems, clock multiplexing in optical

modules,

and

for

overall

signal

boosting

over

extended distances.

(1)

The signlaing rate of a line is the number of voltage

The

SN65LVDS122

and

SN65LVDT122

are

transitions that are made per second expressed in the units

characterized for operation from –40

°C to 85°C.

bps (bits per second).

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2002–2004, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.