EL4543_0709 Datasheet, PDF (1/18 Pages) Intersil Corporation – Triple Differential Twisted-Pair Driver with Common-Mode Sync Encoding

®
Data Sheet
September 13, 2007
EL4543
FN7325.11
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 both a 24 Ld QSOP package and
a 20 Ld QFN package and is specified for operation over the
-40°C to +85°C temperature range.
TABLE 1. SYNC SIGNAL ENCODING
COMMON COMMON COMMON
MODE A
MODE B
MODE C
H
V
(RED)
(GREEN)
(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)
V_LO, max
V_HI, min
0.8V
2V
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 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
PART
MARKING
PACKAGE
PKG.
DWG. #
EL4543IU
EL4543IU 24 Ld QSOP MDP0040
EL4543IU-T7**
EL4543IU 24 Ld QSOP MDP0040
EL4543IU-T13**
EL4543IU 24 Ld QSOP MDP0040
EL4543IUZ
(See Note)
EL4543IUZ 24 Ld QSOP
(Pb-free)
MDP0040
EL4543IUZ-T7**
(See Note)
EL4543IUZ 24 Ld QSOP
(Pb-free)
MDP0040
EL4543IUZ-T13**
(See Note)
EL4543IUZ 24 Ld QSOP
(Pb-free)
MDP0040
EL4543IL
4543IL
20 Ld 4x4 QFN* L20.4x4B
EL4543IL-T7**
4543IL
20 Ld 4x4 QFN* L20.4x4B
EL4543IL-T13**
4543IL
20 Ld 4x4 QFN* L20.4x4B
EL4543ILZ
(See Note)
4543ILZ
20 Ld 4x4 QFN* L20.4x4B
(Pb-free)
EL4543ILZ-T7**
(See Note)
4543ILZ
20 Ld 4x4 QFN* L20.4x4B
(Pb-free)
EL4543ILZ-T13**
(See Note)
4543ILZ
20 Ld 4x4 QFN* L20.4x4B
(Pb-free)
*20 Ld 4x4 QFN, exposed pad 2.7 x 2.7mm is connected to V_S-
**Please refer to TB347 for details on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is 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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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