SN65LVDS348, SN65LVDT348

SN65LVDS352, SN65LVDT352

SLLS523D – FEBRUARY 2002 – REVISED FEBRUATY 2003

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description (continued)

These receivers also provide 3x the standard’s minimum common-mode noise voltage tolerance. The –4 V to

5 V common-mode range allows usage in harsh operating environments or accepts LVPECL, PECL, LVECL,

ECL, CMOS, and LVCMOS levels without level shifting circuitry. See the Application Information Section for

more details on the ECL/PECL to LVDS interface.

Precise control of the differential input voltage thresholds allows for inclusion of 50 mV of input-voltage

hysteresis to improve noise rejection. The differential input thresholds are still no more than

±50 mV over the

full input common-mode voltage range.

The receiver inputs can withstand

±15 kV human-body model (HBM), with respect to ground, without damage.

This provides reliability in cabled and other connections where potentially damaging noise is always a threat.

The receivers also include a (patent-pending) failsafe circuit that provides a high-level output approximately

600 ns after loss of the input signal. The most common causes of signal loss are disconnected cables, shorted

lines, or powered-down transmitters. This prevents noise from being received as valid data under these fault

conditions. This feature may also be used for Wired-Or bus signaling.

The SN65LVDT348 and SN65LVDT352 include an integrated termination resistor. This reduces board space

requirements and parts count by eliminating the need for a separate termination resistor. This can also improve

signal integrity at the receiver by reducing the stub length from the line termination to the receiver.

The intended application of these devices and signaling technique is for point-to-point baseband data

transmission over controlled impedance media of approximately 100

Ω. The transmission media may be

printed-circuit board traces, backplanes, or cables. The ultimate rate and distance of data transfer is dependent

upon the attenuation characteristics of the media and the noise coupling to the environment.

The SN65LVDS348, SN65LVDT348, SN65LVDS352 and SN65LVDT352 are characterized for operation from

–40

°C to 85°C.

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

EN

GND

EN

SN65LVDS348, SN65LVDT348

D or PW PACKAGE

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1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

1A

1B

2A

2B

EN 1,2

AGND

EN 3,4

3A

3B

4A

4B

NC

1Y

DGND1

2Y

NC

NC

3Y

DGND2

4Y

NC

SN65LVDS352, SN65LVDT352

PW PACKAGE

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NC – No internal connection