Communication and interconnect · Application solutions

Single Pair Ethernet (SPE)

T1L, T1S and power over data lines. Part of the "Communication and interconnect" group, which runs from PHYs and switching to industrial buses and pairs each chip with a matching port design.

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Single Pair Ethernet (SPE) solution icon

Typical application circuits

Circuit approaches and matching VOOHU parts, organized by application scenario.

SPE-01

10BASE-T1L PHY interface

The host MAC connects to the single-pair cable through a 10BASE-T1L PHY and an MDI coupling network. Fit an SPE connector at the port as needed.

Host MAC
10BASE-T1L PHY
Coupling network and single-pair cable

Industrial control
PV and energy storage

Core chips (vendor documentation)

DP83TD510ETI · SPE PHY
10BASE-T1L Single Pair Ethernet PHY.
DP83TD510E product page ↗

Matching VOOHU parts

WHSPE00467SPE connector · 2-pin board-side receptacleView WHSPE00467 →
WHSPE00468SPE connector · 2-pin crimp plugView WHSPE00468 →

Design checklist

Check the interface circuit and the connector standard separately.
Do not infer the link distance from the connector part number.
Check the coupling magnetics, termination and MAC timing against the PHY reference circuit.
Check connector mating and the cable, and run interoperability tests.

SPE-02

10BASE-T1S MAC-PHY node

The MCU connects to a 10BASE-T1S MAC-PHY over SPI, and the MAC-PHY joins the multidrop network through a coupling network. This circuit is independent of the T1L circuit.

MCU SPI
10BASE-T1S MAC-PHY
Coupling and multidrop network

Industrial control

Core chips (vendor documentation)

LAN8650Microchip · SPE MAC-PHY
10BASE-T1S MAC-PHY with an SPI host interface.
LAN8650 product page ↗

Matching VOOHU parts

WHSPE00467SPE connector · 2-pin board-side receptacleView WHSPE00467 →
WHSPE00468SPE connector · 2-pin crimp plugView WHSPE00468 →

Design checklist

Define the T1S network conditions and control mode.
Do not reuse T1L distances or the T1L magnetics network.
Check the host driver, SPI bandwidth and PLCA configuration.
Choose coupling parts and connectors for the node topology, and run collision and bit-error tests.

SPE-03

SPE data and PoDL power

Power control and coupling are added on top of the T1L data link to deliver power to the powered end over the single-pair cable. Select the controller and the power magnetics separately.

T1L PHY + power control
Data/power coupling
Single-pair cable and powered end

Industrial control
PV and energy storage

Core chips (vendor documentation)

DP83TD510ETI · SPE PHY
10BASE-T1L Single Pair Ethernet PHY.
DP83TD510E product page ↗

Matching VOOHU parts

WHSPE00467SPE connector · 2-pin board-side receptacleView WHSPE00467 →
WHSPE00468SPE connector · 2-pin crimp plugView WHSPE00468 →

Design checklist

Do not port an RJ45 PoE circuit directly to PoDL.
Validate power and data together.
Define the PSE and PD roles and the applicable standard.
Check the coupling inductors, detection, protection and temperature rise.

Chip part numbers are taken from the vendors' public documentation and are for selection reference only. Check matching VOOHU parts against your project parameters before use.

Standard reference designs for this solution area are being prepared and will be listed on this page once published. For circuit and part selection support, contact a VOOHU FAE.

Need help selecting parts for your project?

Send the chip model, interface data rate, and power and protection requirements to a VOOHU FAE to check the peripheral parts against a reference design.

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Single Pair Ethernet (SPE)

Typical application circuits

10BASE-T1L PHY interface

Core chips (vendor documentation)

Matching VOOHU parts

Design checklist

10BASE-T1S MAC-PHY node

Core chips (vendor documentation)

Matching VOOHU parts

Design checklist

SPE data and PoDL power

Core chips (vendor documentation)

Matching VOOHU parts

Design checklist

Need help selecting parts for your project?

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