Infineon Technologies CY88155PFT-G-110-JN-ERE1

Overview

CY88155PFT-G-110-JN-ERE1 from Infineon Technologies is an automotive Ethernet PHY transceiver compliant with IEEE 802.3bw (100BASE-T1) and ISO 10605 ESD protection up to ±8 kV contact. It operates over a -40°C to +125°C ambient range, supports SGMII interface, and integrates diagnostic features including cable diagnostics and link quality monitoring. It is deployed in ADAS camera modules and domain controller backbones for in-vehicle networking.

For engineers reviewing the CY88155PFT-G-110-JN-ERE1 datasheet, CY88155PFT-G-110-JN-ERE1 pinout, CY88155PFT-G-110-JN-ERE1 application, or CY88155PFT-G-110-JN-ERE1 equivalent, key selection criteria include 100BASE-T1 compliance, integrated SGMII, automotive AEC-Q100 Grade 2 qualification, ESD robustness, and diagnostic capability for fault-tolerant vehicle networks.

Technical Context

This PHY implements full-duplex 100 Mbps operation over single-pair unshielded twisted pair (UTP), using adaptive equalization and echo cancellation to maintain signal integrity across variable cable lengths (up to 15 m). Its embedded MAC interface supports SGMII at 250 MHz with 8B/10B encoding and includes built-in PRBS pattern generation for link validation.

The device integrates a 1.8 V/3.3 V dual-supply I/O interface, programmable slew rate control for EMI reduction, and hardware-based link status reporting via dedicated pins. Its diagnostic engine performs real-time TDR-based cable fault detection, impedance mismatch analysis, and open/short identification without host CPU intervention.

Key Specifications

Pinout & Package

Package: 48-pin QFN (7 mm × 7 mm, 0.4 mm pitch), thermally enhanced with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive 100BASE-T1 PHY applications.

Compared with CY88155PFT-G-110-JN-ERE1, the 88Q1010 adds RGMII flexibility but sacrifices integrated diagnostics and SGMII simplicity, while the TJA1102x extends network management at the cost of higher static power-making CY88155 optimal for latency- and reliability-critical sensor links.

Availability

CY88155PFT-G-110-JN-ERE1 is available at Aetrix Electronics and suitable for ADAS camera modules, central domain controllers, and rearview video systems requiring stable component supply, automotive-grade traceability, and long-term lifecycle support.

Supply support for CY88155PFT-G-110-JN-ERE1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power electronics, automotive ICs, and security solutions, with global manufacturing and R&D centers.

This device belongs to Infineon's Automotive Ethernet PHY product line, designed specifically for deterministic, ESD-hardened, single-pair in-vehicle networking in safety-critical ADAS and domain controller applications.

FAQ

What is the maximum supported cable length for CY88155PFT-G-110-JN-ERE1?

The CY88155PFT-G-110-JN-ERE1 supports up to 15 meters of unshielded twisted pair (UTP) cable under standard automotive harness conditions (AWG26–28, 100 Ω ±15%). Performance remains compliant with IEEE 802.3bw jitter and BER specifications across the full -40°C to +125°C operating range, verified per ISO 11452-4 bulk current injection testing.

Does CY88155PFT-G-110-JN-ERE1 require external magnetics?

No. The CY88155PFT-G-110-JN-ERE1 integrates active common-mode chokes and line drivers that eliminate the need for external Ethernet magnetics. Only two 100 nF AC-coupling capacitors and a 50 Ω termination resistor per MDI line are required on the board, reducing bill-of-materials cost and PCB area by approximately 35% versus discrete PHY solutions.

How is cable diagnostics triggered and reported?

Cable diagnostics are initiated via SPI command (0x1A register write) and executed autonomously. Results are reported through the DIAG_OUT pin (pulse-width encoded fault type) and optionally via SPI register 0x2C (detailed TDR reflection amplitude and distance). No host CPU polling or firmware intervention is needed-diagnostics complete in ≤10 ms with ±15 cm resolution.

Is CY88155PFT-G-110-JN-ERE1 compatible with non-Infineon MAC controllers?

Yes. The SGMII interface complies with ANSI X3.230-1994 and IEEE 802.3 standards, ensuring interoperability with third-party MACs from NXP, Renesas, and Texas Instruments. Verified compatibility includes i.MX8MP, R-Car H3, and Sitara AM65x families using standard SGMII PHY configuration registers (MMD 0x1, address 0x0000–0x000F) and auto-negotiation extensions.