®
EL4543
Data Sheet
October 26, 2005
FN7325.5
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.
TABLE 1. SYNC SIGNAL ENCODING
COMMON
MODE A
(RED)
3.0
2.5
2.0
2.5
COMMON
MODE B
(GREEN)
2.0
3.0
3.0
2.0
COMMON
MODE C
(BLUE)
2.5
2.0
2.5
3.0
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
Ordering Information
PART
NUMBER
EL4543IU
EL4543IU-T7
EL4543IU-T13
EL4543IUZ
(See Note)
EL4543IUZ-T7
(See Note)
PART
TAPE &
MARKING REEL
EL4543IU
EL4543IU
EL4543IU
EL4543IUZ
EL4543IUZ
-
7”
13”
-
7”
13”
-
7”
13”
-
7”
13”
PACKAGE
24 Ld QSOP
24 Ld QSOP
24 Ld QSOP
24 Ld QSOP
(Pb-Free)
24 Ld QSOP
(Pb-Free)
24 Ld QSOP
(Pb-Free)
PKG.
DWG. #
MDP0040
MDP0040
MDP0040
MDP0040
MDP0040
MDP0040
H
Low
Low
High
High
V
High
Low
Low
High
EL4543IUZ-T13 EL4543IUZ
(See Note)
EL4543IL
4543IL
4543IL
4543IL
4543ILZ
4543ILZ
EL4543IL-T7
EL4543IL-T13
EL4543ILZ
(See Note)
EL4543ILZ-T7
(See Note)
20 Ld 4x4 QFN* MDP0046
20 Ld 4x4 QFN* MDP0046
20 Ld 4x4 QFN* MDP0046
20 Ld 4x4 QFN* MDP0046
(Pb-Free)
20 Ld 4x4 QFN* MDP0046
(Pb-Free)
20 Ld 4x4 QFN* MDP0046
(Pb-Free)
TABLE 2. INPUT LOGIC THRESHOLD (+5V SUPPLY)
V
LO
, max
V
HI
, min
0.8V
2V
EL4543ILZ-T13 4543ILZ
(See Note)
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
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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