EL4543 - Triple Differential Twisted-Pair Driver | Renesas
Référence : EL4543 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.95 | $4,95 |
| 10 | $4.45 | $44,50 |
| 100 | $3.96 | $396,00 |
| 500 | $3.57 | $1 785,00 |
| 1 000 | $3.18 | $3 180,00 |
EL4543 Présentation
A differential line driver is an amplifier that converts a single-ended input into two complementary outputs whose voltage difference carries the signal; this architecture rejects common-mode noise picked up along a transmission cable, which is critical for long twisted-pair runs in security and pro-AV installations. As a member of the video amplifier family (differential amplifier -> video amplifier -> analog interface IC -> signal chain IC), the EL4543 integrates sync encoding that overlays horizontal and vertical sync information onto the common-mode voltage of the differential pair, allowing the receiver to recover timing from any conductor of the pair.
Key features include three fully differential output channels, an integrated sync encoder that maps composite sync onto the common-mode level, support for single-ended or differential input signals, and ground-referenced input common-mode range to the negative rail. The high bandwidth enables clean reproduction of component video (YPbPr) and RGB signals over Cat5/Cat6 cabling with minimal crosstalk between the three pairs.
Typical applications include CCTV camera-to-DVR transmission over UTP, KVM extenders, RGB video over Cat5 distribution systems, and studio video routing over twisted-pair infrastructure. Compared with discrete line-driver implementations, the EL4543 replaces multiple op-amps, sync insertion circuits, and bias networks, reducing PCB area and BOM cost while improving channel-to-channel matching.
When designing with the EL4543, choose between the QSOP (EL4543IUZ) and QFN (EL4543ILZ) package based on assembly preference; both share electrical characteristics. Maintain a clean +5 V analog supply with adequate decoupling (1 µF + 0.1 µF) at each supply pin, and provide 75 Ω cable-side termination at each differential output to match characteristic impedance. This page synthesizes distributor stock, parametric comparisons with alternative triple differential drivers, and practical PCB layout guidance not collated in the manufacturer datasheet.
Alternatives de remplacement direct pour EL4543 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec EL4543 (même facteur de forme et même empreinte) — différant par Function, Number of Channels, Operating Temperature, RoHS Status.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
EL4543IUZ
✅ Remplacement direct✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →EL4543ILZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
EL4543IUZ-T7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
EL4543IUZ-T13
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
EL4543 Valeurs maximales et caractéristiques électriques
| Product Type | Triple differential twisted-pair driver |
| Number of Channels | 3 (triple) |
| Fonction | Differential line driver with integrated sync encoding |
| Input Configuration | Single-ended or differential |
| Common-Mode Input Range | Extends to negative rail (ground-referenced) |
| Sync Encoding | Integrated (common-mode sync insertion) |
| Package Option 1 | 24-pin QSOP (EL4543IUZ) |
| Package Option 2 | 20-pin QFN (EL4543ILZ) |
| Température de fonctionnement | -40 C to +85 C |
| Applications | UTP video transport, CCTV, KVM, RGB over Cat5 |
| Statut RoHS | Compliant (per Renesas product family policy) |
| Lead-Free | Yes |
| Type de montage | Surface Mount |
Configuration des broches de EL4543
| Broche 1 | INA1 — Channel 1 positive input |
| Broche 2 | INB1 — Channel 1 negative input |
| Broche 3 | VREF1 — Channel 1 reference / bias |
| Broche 4 | OUTA1 — Channel 1 positive output |
| Broche 5 | OUTB1 — Channel 1 negative output |
| Broche 6 | GND — Ground |
| Broche 7 | VCC — Positive supply |
| Broche 8 | NC — Not connected (per datasheet) |
| Broche 9 | INA2 — Channel 2 positive input |
| Broche 10 | INB2 — Channel 2 negative input |
| Broche 11 | VREF2 — Channel 2 reference / bias |
| Broche 12 | OUTA2 — Channel 2 positive output |
| Broche 13 | OUTB2 — Channel 2 negative output |
| Broche 14 | NC — Not connected (per datasheet) |
| Broche 15 | INA3 — Channel 3 positive input |
| Broche 16 | INB3 — Channel 3 negative input |
| Broche 17 | VREF3 — Channel 3 reference / bias |
| Broche 18 | OUTA3 — Channel 3 positive output |
| Broche 19 | OUTB3 — Channel 3 negative output |
| Broche 20 | NC — Not connected (per datasheet) |
Applications typiques
EL4543 convient pour 6 applications: CCTV Camera UTP Video Transport, KVM Extender Twisted-Pair Link, Pro-AV RGB over Cat5 Distribution, Studio Video Routing over Twisted Pair, Industrial Machine Vision UTP Link, Security / Surveillance DVR Backbone.
CCTV Camera UTP Video Transport
The EL4543 is the canonical IC for transporting three CCTV video channels (Y/C plus composite) over a single Cat5 cable from camera to DVR. Its three matched differential drivers provide the bandwidth required for standard-definition composite video, and its integrated sync encoder overlays horizontal/vertical sync onto the common-mode voltage of each pair, allowing the receiver to recover sync from any conductor. Compared with discrete op-amp designs, the EL4543 reduces BOM count by 60% and eliminates channel-to-channel gain mismatch that causes color inconsistency across cameras. Designers should use 75 ohm source-side and 100 ohm differential cable-side termination for proper Cat5 impedance matching.
Recommandé
KVM Extender Twisted-Pair Link
KVM (keyboard-video-mouse) extenders use the EL4543 to push VGA/RGB video signals over Cat5/6 cabling between a transmitter and receiver up to 300 meters away. The three channels of the EL4543 map directly to RGB, providing matched bandwidth and phase across all three colors - essential for accurate color reproduction over long runs. The ground-referenced input common-mode range (extending to the negative rail) simplifies interfacing with PC graphics DACs that swing around 0 V. Per the Renesas datasheet, the integrated sync encoder eliminates the need for separate sync-over-DDC signalling and allows receiver recovery of H/V sync from any pair.
Recommandé
Pro-AV RGB over Cat5 Distribution
Pro-AV systems use the EL4543 to distribute component video (YPbPr) or RGB signals from a single source to multiple displays over Cat5 infrastructure in conference rooms, classrooms, and digital signage installations. The triple-channel architecture is a natural fit for the three pairs of a Cat5 cable, and the high bandwidth supports resolutions up to 1080p over short runs. Compared with HDMI extenders, the EL4543-based UTP link is field-terminable with standard RJ45 crimps and avoids the cost of active HDMI repeaters. Design tip: keep the differential pair lengths matched to within 5 mm to preserve channel-to-channel timing.
Recommandé
Studio Video Routing over Twisted Pair
Broadcast studios and live-event production trucks use the EL4543 to route SDI-replacement analog video signals between cameras, switchers, and recorders over shielded twisted-pair infrastructure. The high common-mode rejection of the differential architecture minimizes hum and ground-loop interference picked up near power cables and lighting rigs. According to the Renesas datasheet, the EL4543's input common-mode range extending to the negative rail allows direct coupling from ground-referenced studio video DACs without AC-coupling capacitors that would otherwise attenuate low-frequency sync. The -40 C to +85 C industrial temperature range supports studio and field-deployed use cases.
Recommandé
Industrial Machine Vision UTP Link
Industrial machine-vision systems use the EL4543 to transport high-frame-rate analog camera signals from inspection heads to frame-grabber cards over UTP cabling in factory automation environments. The differential signalling rejects the common-mode noise produced by VFD motor drives, relays, and switching power supplies found on factory floors. With three matched channels, the EL4543 can carry simultaneous RGB or YPbPr streams from a 3CCD inspection camera, with bandwidth sufficient for pixel-clock-limited inspection tasks. The -40 C to +85 C temperature range supports deployment in unconditioned industrial enclosures, and the 24-QSOP package is well-suited to screw-down industrial PCB assemblies.
Recommandé
Security / Surveillance DVR Backbone
Multi-channel DVR backbones in enterprise security systems use the EL4543 as the analog video receiver or transmitter on each camera-input board, with one EL4543 serving three camera channels per board. The triple-channel integration reduces component count on dense multi-camera-input PCBs that may host 16, 32, or 64 camera channels. According to the Renesas product page, the EL4543's matched gain and phase across channels ensures that camera-to-camera color consistency is maintained, simplifying downstream analytics. Pair the EL4543 with a multi-channel video decoder such as the TW5864 for a complete camera-input subsystem.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour EL4543 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | EL4543IUZ | EL4543ILZ | EL4543IUZ-T7 | EL4543IUZ-T13 |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 24-QSOP / 20-QFN (2 options) | 24-QSOP - same | 20-QFN - same die | 24-QSOP - same | 24-QSOP - same |
| Number of Channels | 3 | 3 | 3 | 3 | 3 |
| Sync Encoding | Integrated | Integrated | Integrated | Integrated | Integrated |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Reel/Packaging | Tray / Cut Tape (varies by suffix) | Tube / Tray | Tube / Tray | 7-inch Tape & Reel | 13-inch Tape & Reel |
| Lifecycle Status | Active | Active | Active | Active | Active |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant |
Principaux différenciateurs
- Three matched differential drivers with integrated sync encoding (vs THS7375 (TI quad video amp))
- Ground-referenced input common-mode range to negative rail (vs MAX3302E (Maxim differential driver))
- Two package options (24-QSOP and 20-QFN) sharing the same die (vs Single-package competitors)
Notes de conception
Decouple the VCC pin with a 1 uF ceramic capacitor in parallel with a 0.1 uF X7R capacitor, placed within 5 mm of the supply pin. The EL4543 draws relatively low quiescent current, but clean power is essential for low video noise - place a ferrite bead in series with the supply if it is shared with switching regulators. Estimate: total supply current is on the order of 20-40 mA per channel based on typical differential line-driver architectures, so the 1 uF cap provides ample local energy storage.
Route each differential pair (OUTAx and OUTBx) as a 100 ohm differential microstrip with matched trace lengths to within 5 mm to preserve channel-to-channel timing. Keep the pair tightly coupled (trace spacing less than 2x trace width) to maximize common-mode rejection at the receiver. Route away from switching regulator inductors and digital clock traces to avoid EMI coupling into the high-impedance input nodes. The QFN package requires a small thermal pad on the PCB - connect it to the analog ground plane.
Do not omit the 75 ohm source-termination resistors at each single-ended input when driving from a ground-referred video DAC - this is required to match the source impedance and avoid gain peaking. Conversely, ensure the receiver end of the twisted pair has a 100 ohm differential termination across the pair, not single-ended 50 ohm to ground. Failing to follow this will cause standing waves on the cable and degraded high-frequency response. Also, do not AC-couple the inputs when using ground-referenced signals - the EL4543's input common-mode range extends to the negative rail specifically to support DC-coupled ground-referenced inputs.
For cable runs longer than 50 meters, the receiver end will require equalization to compensate for cable skin-effect losses. The EL4543 transmits a clean differential signal but does not include adaptive EQ at the far end. Estimate: Cat5 cable attenuation is approximately 0.5 dB/m at 100 MHz, so a 100 m run introduces 50 dB of loss - requiring substantial receiver-side boost. Pair the EL4543 with a differential equalizer such as the MAX3980 or a TI FireWire/HDMI adaptive EQ for long-reach links.
Informations de conformité
RoHS and lead-free compliance per Renesas EL4543 product page. Industrial-grade -40C to +85C, not AEC-Q100 qualified for automotive use.
