1

®

FN7325.9

EL4543

Triple Differential Twisted-Pair Driver with

Common-Mode Sync Encoding

The EL4543 is a high bandwidth triple differential amplifier

with integrated encoding of video sync signals. The inputs

are suitable for handling high speed video or other

communications signals in either single-ended or differential

form, and the common-mode input range extends all the way

to the negative rail enabling ground-referenced signalling in

single supply applications. The high bandwidth enables

differential signalling onto standard twisted-pair or coax with

very low harmonic distortion, while internal feedback

ensures balanced gain and phase at the outputs reducing

radiated EMI and harmonics.

Embedded logic encodes standard video horizontal and

vertical sync signals onto the common mode of the twisted

pair(s), transmitting this additional information without the

requirement for additional buffers or transmission lines. The

EL4543 enables significant system cost savings when

compared with discrete line driver alternatives.

The EL4543 is available in a 24 Ld QSOP package and is

specified for operation over the -40°C to +85°C temperature

range.

Features

• Fully differential inputs, outputs, and feedback

• 350MHz -3dB bandwidth

• 1200V/µs slew rate

• -75dB distortion at 5MHz

• Single 5V to 12V operation

• 50mA minimum output current

• Low power - 36mA total typical supply current

• Pb-free plus anneal available (RoHS compliant)

Applications

• Twisted-pair drivers

• Differential line drivers

• VGA over twisted-pair

• Transmission of analog signals in a noisy environment

TABLE 1. SYNC SIGNAL ENCODING

HV

COMMON

MODE A

(RED)

COMMON

MODE B

(GREEN)

COMMON

MODE C

(BLUE)

Low

High

3.0

2.0

2.5

Low

Low

2.5

3.0

2.0

High

Low

2.0

3.0

2.5

High

High

2.5

2.0

3.0

TABLE 2. INPUT LOGIC THRESHOLD (+5V SUPPLY)

0.8V

2V

Ordering Information

PART

NUMBER

PART

MARKING

TAPE &

REEL

PACKAGE

PKG.

DWG. #

EL4543IU

EL4543IU

-

24 Ld QSOP

MDP0040

EL4543IU-T7

EL4543IU

7”

24 Ld QSOP

MDP0040

EL4543IU-T13

EL4543IU

13”

24 Ld QSOP

MDP0040

EL4543IUZ

(See Note)

EL4543IUZ

-

24 Ld QSOP

(Pb-free)

MDP0040

EL4543IUZ-T7

(See Note)

EL4543IUZ

7”

24 Ld QSOP

(Pb-free)

MDP0040

EL4543IUZ-T13

(See Note)

EL4543IUZ

13”

24 Ld QSOP

(Pb-free)

MDP0040

EL4543IL

4543IL

-

20 Ld 4x4 QFN* MDP0046

EL4543IL-T7

4543IL

7”

20 Ld 4x4 QFN* MDP0046

EL4543IL-T13

4543IL

13”

20 Ld 4x4 QFN* MDP0046

EL4543ILZ

(See Note)

4543ILZ

-

20 Ld 4x4 QFN*

(Pb-free)

MDP0046

EL4543ILZ-T7

(See Note)

4543ILZ

7”

20 Ld 4x4 QFN*

(Pb-free)

MDP0046

EL4543ILZ-T13

(See Note)

4543ILZ

13”

20 Ld 4x4 QFN*

(Pb-free)

MDP0046

NOTE: Intersil Pb-free plus anneal products employ special Pb-free

material sets; molding compounds/die attach materials and 100% matte tin

plate termination finish, which are RoHS compliant and compatible with

both SnPb and Pb-free soldering operations. Intersil Pb-free products are

MSL classified at Pb-free peak reflow temperatures that meet or exceed

the Pb-free requirements of IPC/JEDEC J STD-020.

*20 Ld 4x4 QFN, exposed pad 2.7 x 2.7mm

Data Sheet

January 5, 2007

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Copyright © Intersil Americas Inc. 2004-2007. All Rights Reserved.

All other trademarks mentioned are the property of their respective owners

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