EL4543IUZ - Triple Differential Twisted-Pair Video Driver | Renesas
MPN: EL4543IUZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1 | $1.00 |
| 1 | $0 | $0.00 |
EL4543IUZ Overview
A differential line driver is an amplifier stage that converts a single-ended or differential input signal into a balanced differential output pair suitable for transmission over twisted-pair or coaxial cable. Within the signal-chain hierarchy, it sits between a video source (encoder, GPU, camera sensor output) and the cable plant, complementing a differential receiver at the far end. Balanced transmission rejects common-mode noise picked up on the cable, which is why differential line drivers are the standard solution for long video links in KVM extenders, industrial displays, and automotive video systems.
Key features of the EL4543 include three fully differential high-speed amplifier channels capable of handling high-resolution composite video, integrated encoding of video sync signals onto the common-mode of the output pairs (eliminating a separate sync channel and reducing cable count), and an input common-mode range that extends all the way to the negative rail. That rail-to-negative common-mode capability permits simple ground-referenced input termination in single-supply systems, removing the need for input level-shifting circuitry. The part accepts inputs in either single-ended or differential form, giving designers flexibility at the source interface.
Technically, each channel drives a twisted pair with a balanced output whose sync information rides on the common-mode voltage, so a standard differential receiver with common-mode detection can recover both video and timing. Integrating three channels plus sync encoding in one IC delivers significant system cost savings versus discrete line-driver alternatives, per the manufacturer datasheet, cutting BOM count, board area, and channel-to-channel skew.
Typical applications include KVM and video extender transmitter boards, driving high-resolution video over Cat5-class twisted pair, security camera video distribution, and industrial display links where sync and video must share one cable run.
A key design consideration is supply decoupling and output termination: differential drivers require tight layout around each output pair and correct cable-side termination to preserve return-loss and minimize radiated emissions at video frequencies.
This page adds value beyond the datasheet by compiling drop-in part variants, pricing tiers, design notes, and application guidance sourced from Renesas and distributor data.
Drop-in alternatives for EL4543IUZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
EL4543IU
β Drop-Inπ Reference alternative (not in catalog)
EL4543IUZ-T13
β Drop-Inπ Reference alternative (not in catalog)
EL4543IUZ Maximum Ratings & Electrical Characteristics
| Number of Channels | 3 |
| Amplifier Type | Triple fully differential line driver |
| Function | Twisted-pair video driver with common-mode sync encoding |
| Input Type | Single-ended or differential |
| Input Common-Mode Range | Extends to negative rail |
| Output Termination | Differential twisted pair or coaxial cable |
| Operating Temperature | -40C to +85C |
| Package | 24-lead QSOP (IUZ) |
| Alternate Package | 20-lead QFN (ILZ) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (IUZ lead-free suffix) |
EL4543IUZ 20-lead qfn (ilz) Pin Configuration Guide
Pin configuration for EL4543IUZ (20-lead qfn (ilz) package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for EL4543IUZ.
Refer to the datasheet for full pin configuration.
Typical Applications
EL4543IUZ is suitable for 6 applications: KVM and Video Extender Transmitters, High-Resolution Composite Video Distribution, Security Camera Video Transmission, Industrial Display Interfaces, RGB Component Video over Cat5 Cable, Medical Imaging Monitor Video Links.
KVM and Video Extender Transmitters
The EL4543 fits KVM/video extender transmit boards because its three differential channels map directly to RGB or YPbPr component video, while common-mode sync encoding carries horizontal and vertical timing on the same twisted pairs. In a typical extender transmitter, ground-referenced VGA or component-video source signals terminate into the EL4543 inputs - enabled by the input common-mode range extending to the negative rail in single-supply designs - and each output drives one Cat5-class pair toward a remote receiver. The integrated sync encoding eliminates a dedicated sync cable and discrete encoding transistors, cutting BOM cost, per the Renesas datasheet cost-savings claim. Performance-wise, balanced transmission rejects cable-pickup noise and ground-loop offsets over long runs, preserving video sharpness at the receiver end.
Recommended
High-Resolution Composite Video Distribution
For distribution amplifiers sending high-resolution composite or component video to multiple monitors, the EL4543 provides three fully differential high-speed amplifiers specified for driving high-resolution composite video onto twisted pair or standard coaxial cable, as stated in the Renesas functional description. Its bandwidth class supports high-speed video signals in either single-ended or differential form at the input, so a central video source can fan out to multiple cable runs without format conversion. Using the EL4543 instead of discrete buffer trees shortens the signal path, reduces channel-to-channel skew between RGB components (important for color registration), and integrates sync-on-common-mode so downstream receivers recover timing. The 24-QSOP surface-mount package keeps per-channel board area small in multi-output distribution frames.
Recommended
Security Camera Video Transmission
In analog CCTV and security camera head-ends, the EL4543 drives camera video over long twisted-pair runs where noise immunity matters. Ground-referenced camera outputs connect directly to the EL4543 inputs because the common-mode input range reaches the negative rail, permitting single-supply camera electronics without coupling capacitors or bias networks. The differential outputs then reject induced hum and EMI along the cable run - the core benefit of balanced transmission in electrically noisy buildings. Common-mode sync encoding keeps the composite sync intact on the same pair, so a remote receiver reconstructs standard video timing. The -40C to +85C operating range covers outdoor camera enclosures and unconditioned equipment closets, and the QSOP package suits compact camera(board designs where space is constrained.
Recommended
Industrial Display Interfaces
Industrial LCD and touch displays separated from their controllers benefit from the EL4543's three-channel differential link: video channels cross factory-floor EMI on dedicated twisted pairs with common-mode sync timing, rather than unbalanced coax vulnerable to motor and inverter noise. The driver's input flexibility accepts single-ended graphics-controller outputs directly, and single-supply operation with negative-rail common-mode inputs simplifies the 5V or single-rail logic environment typical of industrial panels. Renesas positions the EL4543 explicitly against discrete line-driver alternatives, and in this application the integration removes six or more discrete components plus their matching and skew concerns. The industrial temperature range of -40C to +85C aligns with machinery cabinet ambient conditions.
Recommended
RGB Component Video over Cat5 Cable
The classic EL4543 use case is mapping RGB plus sync onto four-pair Cat5 cabling: three EL4543 channels drive R, G, and B differentially, each with sync encoded on its common-mode, so a standard 4-pair cable carries full-bandwidth component video between equipment racks or rooms. Because inputs handle high-speed video in single-ended or differential form, the device interfaces equally well to consumer RGB outputs or professional balanced sources, per the datasheet input description. Compared with three discrete driver pairs plus a sync encoder, the single IC guarantees channel-to-channel matching and skew, directly benefiting color convergence at the display. The 24-QSOP footprint supports dense multi-channel breakout hardware.
Recommended
Medical Imaging Monitor Video Links
Medical display subsystems - ultrasound consoles, endoscopy monitors, modality workstations - require clean, low-skew video between the image processor and the display head. The EL4543's three matched differential channels preserve RGB timing alignment critical for diagnostic grayscale accuracy, and balanced transmission minimizes radiated emissions in electromagnetically sensitive clinical environments. Ground-referenced processor outputs drive the EL4543 directly thanks to the negative-rail input common-mode range, keeping the single-supply analog front end simple. Per Renesas, integrated sync encoding on the common-mode removes a separate sync link, reducing cable harness complexity inside articulated monitor arms. The -40C to +85C range and QSOP surface-mount package suit sterilizable, sealed monitor housings.
Recommended
Recommended Products Summary
Engineering reference data for EL4543IUZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EL4543IU | EL4543IUZ-T13 | EL4543ILZ | LMH6551 |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Texas Instruments |
| Channels | 3 differential | 3 differential | 3 differential | 3 differential | 1 differential |
| Sync Encoding | Common-mode sync encoding integrated | Yes - same die | Yes - same die | Yes - same die | No - external required |
| Drop-in Compatibility | Reference footprint | Pin-to-pin drop-in | Pin-to-pin drop-in | Not drop-in (QFN) | Not drop-in (1 channel) |
Key Differentiators
- Integrated common-mode sync encoding on all three channels (vs LMH6551)
- Input common-mode range extends to the negative rail (vs EL4543ILZ (packaging choice basis))
- Three matched channels in one IC (vs EL4543IU (discrete alternative comparison))
Design Notes
Lay out each differential output pair as a tightly coupled, length-matched pair routed directly to the connector or RJ45/Cat5 magnetics. Keep the loop area between each OUT+ and OUT- trace minimal to control differential-mode emissions at video frequencies, and place the 24-QSOP device close to the cable connector to limit stub length. Provide a solid, uninterrupted ground plane under the pairs; avoid splitting the plane beneath any driven pair, which would convert balanced signals into common-mode radiation. Per the manufacturer datasheet, the EL4543 replaces discrete driver trees, so removed discrete matching networks free layout margin for pair routing discipline.
Exploit the negative-rail input common-mode range by using simple ground-referenced termination at the inputs in single-supply systems - the datasheet explicitly enables this to avoid AC coupling or bias networks. At the source end, terminate the incoming video with its characteristic impedance before the amplifier input. On the cable side, confirm the receiver employs matching common-mode sync detection; the EL4543 encodes timing on the output common-mode, so a receiver lacking this function will lose sync entirely even though the differential video component looks normal on an oscilloscope.
Decouple the supply with a low-ESR ceramic capacitor (typically 0.1uF in parallel with a bulk capacitor) placed within a few millimeters of the QSOP supply pin, since three high-speed channels switch simultaneously and charge demand is bursty at video edge rates. Estimated: with three channels driving cable loads at video slew rates, supply transients concentrate at sync edges, so a shared high-impedance supply trace can couple sync artifacts into video - verify sync-to-video crosstalk on a prototype with a square-wave sync pattern. Exact supply current and voltage figures should be taken from the Renesas datasheet electrical characteristics table.
Compliance Information
The Z suffix on EL4543IUZ and EL4543ILZ denotes lead-free/RoHS-compliant finishing per Renesas/Intersil ordering-code convention. The EL4543IU ordering code is the standard lead-finish version.
