Diodes Incorporated PI7C9X3G606GPQ3FCAEX

Overview

PI7C9X3G606GPQ3FCAEX from Diodes Incorporated is an AEC-Q100 Grade 3 automotive PCIe 3.0 packet switch with 6 ports and 6 lanes, supporting ≤150 ns typical packet forwarding latency, 7 power states (P0–P1.2PG), and integrated PCIe Gen3 clock buffer for downstream ports. It enables zonal ECU interconnect, ADAS sensor fusion, and multi-host failover via up to 3 Cross-Domain End-Point (CDEP) ports in automotive central controller architectures.

For engineers reviewing the PI7C9X3G606GPQ3FCAEX datasheet, PI7C9X3G606GPQ3FCAEX pinout, PI7C9X3G606GPQ3FCAEX application, or PI7C9X3G606GPQ3FCAEX equivalent, key selection criteria include PCIe 3.0 lane bifurcation support, RAS features (end-to-end ECC, DPC, surprise hot removal), CDEP port configurability, and FC LFBGA-144 thermal performance at −40°C to +85°C.

Technical Context

This switch implements full PCIe 3.0 protocol stack (PHY, Data Link, Transaction layers) with adaptive CTLE/5-tap DFE RX equalization and 3-tap programmable TX equalization to maintain signal integrity over >30 dB channel loss. It supports elastic bifurcation, configurable upstream (up to 2 ports) and downstream (up to 15 ports) topologies, and dual-clock modes (Base/CDSR).

The device integrates side-band interfaces including I²C/SMBus, SPI EEPROM, and IEEE 1149.1/1149.6 JTAG for configuration and diagnostics. Its RAS architecture delivers classified error reporting (correctable/non-fatal/fatal), end-to-end data protection, and Downstream Port Containment (DPC) for automotive safety-critical domains.

Key Specifications

Pinout & Package

Package: FC LFBGA (FCA144), 144-pin Fine-Pitch Chip-Scale Package, 10 mm × 10 mm, MSL-3, lead-free and halogen-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCIe 3.0 packet switch applications.

Compared with LAN9668 and S32G399A, PI7C9X3G606GPQ3FCAEX uniquely delivers native PCIe 3.0 switching with 6 configurable ports, CDEP-enabled host-to-host communication, and AEC-Q100 Grade 3 RAS-making it the only solution for scalable, safety-certifiable PCIe fabrics in next-gen zonal ECUs.

Availability

PI7C9X3G606GPQ3FCAEX is available at Aetrix Electronics and suitable for zonal central controllers, ADAS sensor fusion hubs, and telematics control units requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.

Supply support for PI7C9X3G606GPQ3FCAEX 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits, specializing in high-reliability solutions for automotive, industrial, and computing markets.

The PI7C9X3G Automotive PCIe 3.0 Packet Switch product line was engineered specifically for zonal ECU architectures-delivering RAS, multi-host CDEP, and signal integrity robustness required in ADAS, central controller, and telematics applications.

FAQ

What is the maximum number of endpoints supported by PI7C9X3G606GPQ3FCAEX?

The device supports up to 15 PCIe endpoints, including SSDs, AI accelerators, and sensor SoCs. This is achieved through its 6-port architecture with elastic bifurcation-allowing flexible allocation of lanes across downstream ports while maintaining full PCIe 3.0 compliance and sub-150 ns forwarding latency.

Does PI7C9X3G606GPQ3FCAEX support PCIe 4.0 or higher?

No. PI7C9X3G606GPQ3FCAEX is strictly compliant with PCI Express Base Specification Revision 3.1 (Gen3). It does not support Gen4 signaling rates (16 GT/s) or associated features such as PAM4 encoding, FLIT mode, or updated LTSSM states. Its design targets automotive Gen3 ecosystems where signal integrity over long harness traces is prioritized over raw bandwidth.

How is thermal management implemented in this device?

Thermal management uses an on-die temperature sensor reporting junction temperature via SMBus/I²C. When temperature exceeds configurable thresholds, the device initiates thermal throttling-including dynamic reduction of TX swing and equalization settings-to maintain operation within −40°C to +85°C ambient while preventing permanent damage above +125°C junction temperature.

Can PI7C9X3G606GPQ3FCAEX be used in non-automotive applications?

While functionally capable in industrial or computing environments, PI7C9X3G606GPQ3FCAEX is qualified only to AEC-Q100 Grade 3 and manufactured in IATF 16949-certified facilities. Its RAS features, extended temperature range, and automotive-specific validation (e.g., DPC, surprise hot removal) are optimized for vehicle use-making it unsuitable for commercial-grade deployments where cost or qualification overhead is prohibitive.