【Application Solution】 SPE Single-Pair Ethernet Solution (Phase 2)

VOOHU Electronics has launched a single-pair Ethernet (SPE) solution based on the Jinglue JL3111.
This solution is used for single-pair twisted-pair communication, supports RMII 100Mbps data rates, and complies with IEEE 802.3bw.
This solution is suitable for automotive and compact intelligent industrial applications, featuring excellent EMI/EMC and ESD performance, meeting the interference immunity and low power consumption requirements of both automotive and industrial control fields.




To help customers intuitively understand solution details and quickly match their needs, VOOHU's official website (WWW.VOOHU.CN) has established a solutions section: Click on Industry Solutions -- Solutions -- SPE, where you can view complete solution documents (including topology diagrams, component selection lists, and performance parameter tables) for various scenarios, download technical manuals for various sub-fields, and obtain test data and optimization suggestions from solution implementation cases. Whether it's early solution planning, mid-term technology selection, or late-stage problem troubleshooting, the website's reference resources can provide customers with precise support, helping to shorten the design cycle and reduce development risks.

Schematic diagram of the solution
1. PHY
Compliant with 1000BASE-T1 IEEE 802.3bp specification
Compliant with 100BASE-T1 IEEE 802.3bw specification
RGMII supports multiple voltage levels, including 3.3/2.5/1.8/1.5V
Integrated MDI interface termination matching resistor to eliminate passive components
Supports auto-negotiation
Supports baseline drift (BLW) compensation
Supports interrupt functionality
Supports Wake-up on Network (WoL) functionality
Adaptive equalization and echo cancellation
Automatic polarity correction
Network status indicator
Supports IEEE 1588v1/v2 and 802.1AS
Ultra-low power consumption
Package: 40-pin 6mm×6mm QFN

VDD_HV_B: Ethernet module power supply is 3V, connected to the VDD power domain
TX_EN: Transmit enable signal
SMI: Serial Management Interface, including MDC and MDIO signal lines.
TXD[1:0]: Data transmit signal, a 2-bit data signal.
RXD[1:0]: Data receive signal, a 2-bit data signal. The RMII interface exchanges 2-bit data signals TXD[1:0] and RXD[1:0], and transmit and receive signals are synchronized with REF_CLK (shared reference clock).
RX_ER: Receive error signal. This signal must be held for one or more cycles (RX_CLK) to indicate to the MAC sublayer that an error has been detected somewhere in the frame.
RX_DV: Receive data valid signal. This signal indicates that the PHY is currently receiving a recovered and decoded half-byte for RMII reception.
TX_CLK: Continuous clock signal, which provides the reference timing for TX data transmission. The nominal frequency is 5MHz for a speed of 10Mbit/s and 50MHz for a speed of 100 Mbit/s. Currently, the S32K344 board uses an external crystal oscillator to provide a 50MHz clock source for 100Mbit/s communication.

2. Lan Transformer
Voohu introduces a new type of chip network transformer (Chip Lan) with leading fully automated production. It adopts an H+I structure and a fully automated production mode, breaking through the traditional toroidal wound transformer and inductor design schemes to achieve large-scale, fully automated production. The product complies with EU RoHS 2.0 standards and is compatible with products from major global PHY chip suppliers.

The 100/1000/2.5G/5G/10GBASE-T new chip network transformer complies with the relevant standards of IEEE 802.3 wired LAN. Its advantages of small size, high voltage withstand, wide temperature compatibility, and low cost make it widely used in network communication, consumer electronics, and other fields.

Insertion loss reduced by 40%, consistency ±3% (as shown in the figure)


Return loss optimized by 35%: core interference reduced, signal reflection significantly suppressed (as shown in the figure).

Supports PoE af/at/bt: Power supply capacity up to 90W+, meeting the needs of IP cameras/industrial IoT

X'FMR:
Suitable for LAN interfaces of various devices including network equipment, communication equipment, and digital consumer electronics
Compliant with Ethernet 1GBase-T standard
Improved return loss and crosstalk characteristics
High-quality product using automated winding process
Operating temperature range: -40℃ to +105℃
Supports 1500Vrms/1mA/60s high voltage testing
RoHS compliant

CMC:
High common-mode impedance provides excellent noise suppression at high frequencies
90Ω~1200Ω selectable, suitable for different noise levels and signal frequencies
Suppresses common-mode noise without attenuating the signal
High-quality product using automated winding process
Operating temperature: -40℃ to +105℃
2012(0805) package, RoHS compliant


By selecting appropriate core chips, implementing meticulous PCB layout to address high-frequency losses and electromagnetic compatibility, and employing stringent signal protection strategies, stable, reliable, compact, and fully compliant single-pair Ethernet communication devices can be constructed to meet the growing demand for lightweight cabling and high-bandwidth data communication in fields such as industrial control, automotive networks, and intelligent sensing.

Voohu's Value Promise – Choose Voohu, Truly Reliable
Voohu's systematic solutions go beyond just material matching; we empower our clients with three key values:

1. Customized Services: We provide customized hardware design and manufacturing services based on your specific needs. Whether it's a unique application scenario or a personalized functional requirement, we can meet your needs.
2. One-Stop Procurement: Clients can source all the hardware products they need from us, including RJ45 connectors, network transformers, ESD protection devices, and Ethernet port PHYs. One-stop procurement is not only convenient and fast but also reduces costs.
3. Technical Support: We offer comprehensive technical support, from hardware selection to circuit design, from testing and verification to manufacturing. Our technical support team consists of experienced engineers who can quickly respond to client needs and resolve their issues.

From its founding in 2018 to its overseas expansion in 2025, Voohu Electronics has become a reliable partner for over 1000 companies thanks to its "superior quality, reasonable prices, attentive service, and reliable delivery." If you're also looking for a reliable, cost-effective, and hassle-free supplier of communication electronic components, consider Voohu. After all, with over 100 listed companies as a partner, you can't go wrong.

Choosing Voohu – truly reliable – isn't just a slogan; it's the answer written with the trust of over 1000 customers over 8 years.