Renesas 89HPES10T4G2ZBBCI8

Overview

89HPES10T4G2ZBBCI8 from Integrated Device Technology, Inc. is a 10-lane, 4-port PCI Express Gen2 switch IC designed for high-throughput interconnect in servers, storage, and networking equipment. It delivers 5 Gbps per lane, supports one x4 upstream port and three x2 downstream ports, implements cut-through switching architecture with ≤150 ns latency, and complies fully with PCI Express Base Specification Revision 2.0.

For engineers reviewing the 89HPES10T4G2ZBBCI8 datasheet, 89HPES10T4G2ZBBCI8 pinout, 89HPES10T4G2ZBBCI8 application, or 89HPES10T4G2ZBBCI8 equivalent, key selection criteria include Gen2 lane count allocation (x4/x2/x2/x2), integrated SerDes with on-chip 8b/10b encoding, SMBus-configurable operation, Hot-Plug I/O expander interface support, and RAS features including end-to-end parity and ECRC.

Technical Context

The 89HPES10T4G2ZBBCI8 implements a layered PCI Express stack-Physical, Data Link, and Transaction layers-fully compliant with PCIe Base Spec 2.0. Its switch core supports both store-and-forward and cut-through modes, with eight traffic classes and one virtual channel for QoS-aware routing.

It integrates ten 5 Gbps embedded SerDes with receive equalization (RxEQ), eliminating need for external transceivers. Configuration is managed via dual SMBus interfaces: slave interface enables full register access, while master interface loads default settings from external serial EEPROM and controls Hot-Plug I/O expanders.

Key Specifications

Pinout & Package

Packaged in a 19 mm × 19 mm, 324-ball CABGA (1 mm ball pitch) with thermal pad. Pinout supports full PCIe Gen2 signaling, dual SMBus, 9 GPIOs with alternate functions, JTAG debug, reference clock inputs, and dedicated SerDes bias resistors.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCIe Gen2 switching applications.

Compared with 89HPES10T4G2ZBBCI8, the 89HPES12T4G2ZBBCI8 provides extra lane capacity in identical footprint, while PI7C9X2G304SVDE trades RAS robustness for lower BOM cost and simpler configuration - making each suitable for distinct tiers of server, storage, or communications infrastructure.

Availability

89HPES10T4G2ZBBCI8 is available at Aetrix Electronics and suitable for server motherboard design, enterprise storage subsystem integration, and communications equipment development requiring stable component supply and long-term industrial temperature support.

Supply support for 89HPES10T4G2ZBBCI8 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

Integrated Device Technology, Inc. (IDT) is a fabless semiconductor company specializing in timing, memory interface, RF, and interconnect solutions for datacenter, communications, and industrial markets.

The 89HPES10T4G2ZBBCI8 belongs to IDT's PRECISE™ family of PCIe switching solutions, engineered specifically for high-performance, low-latency fan-out in space-constrained server and storage platforms where reliability and configurability are critical.

FAQ

What is the PCIe generation and lane configuration supported by the 89HPES10T4G2ZBBCI8?

The 89HPES10T4G2ZBBCI8 is a PCI Express Gen2 switch supporting ten 5 Gbps lanes distributed across four ports: one x4 upstream port (Port 0) and three x2 downstream ports (Ports 2, 4, and 6). It fully complies with PCI Express Base Specification Revision 2.0 and performs automatic per-port link width negotiation down to x1. This configuration enables efficient I/O expansion in servers and storage systems without requiring external retimers or additional root complex resources.

Does the 89HPES10T4G2ZBBCI8 support Hot-Plug functionality, and how is it implemented?

Yes, the 89HPES10T4G2ZBBCI8 supports PCI Express Native Hot-Plug on all downstream ports. It implements this via an SMBus master interface that communicates with an external Hot-Plug I/O expander (e.g., standard PC motherboard devices). The 89HPES10T4G2ZBBCI8 generates SMBus transactions to update Hot-Plug output states and responds to interrupts from the expander on GPIO pins like IOEXPINTN0 and IOEXPINTN2. This architecture offloads Hot-Plug logic from the switch itself, reducing pin count and enabling seamless drive or card insertion/removal in enterprise storage and server platforms.

What power supply rails does the 89HPES10T4G2ZBBCI8 require, and what are their operating ranges?

The 89HPES10T4G2ZBBCI8 requires five distinct supply rails: VDDCORE (0.9–1.1 V), VDDI/O (3.135–3.465 V), VDDPEA (0.95–1.1 V), VDDPEHA (2.25–2.75 V), and VDDPETA (0.95–1.1 V). Each rail serves a specific function - core logic, I/O buffers, SerDes analog, high-power SerDes, and transmitter analog respectively. Power-up sequencing mandates VDDCORE remain at least 1.0 V below VDDI/O during ramp-up. Typical total power consumption is 1.64 W under full 4/2/2/2 lane usage at 25°C, scaling down to 1.23 W with reduced active lanes.

How is configuration handled on the 89HPES10T4G2ZBBCI8, and what interfaces are available?

Configuration of the 89HPES10T4G2ZBBCI8 is handled through two independent SMBus interfaces: a slave interface for full read/write access to all internal registers (e.g., by a BMC or host processor), and a master interface that loads default configuration values from an external serial EEPROM after reset. The master interface also controls Hot-Plug I/O expanders. Additionally, three SWMODE pins set boot mode (normal vs. EEPROM-initiated), and REFCLKM selects reference clock frequency (100 MHz or 125 MHz). This dual-SMBus architecture enables both factory-programmed defaults and runtime reconfiguration without requiring PCIe link establishment.

What RAS (Reliability, Availability, Serviceability) features does the 89HPES10T4G2ZBBCI8 provide?

The 89HPES10T4G2ZBBCI8 includes multiple RAS features: end-to-end parity protection on all TLPs to detect data corruption even in systems without ECRC, full support for ECRC and Advanced Error Reporting (AER), PCI Express Native Hot-Plug compliance, and compatibility with standard Hot-Plug I/O expanders. These features collectively ensure data integrity, enable precise error localization, support graceful recovery from link failures, and allow safe field maintenance - making the 89HPES10T4G2ZBBCI8 suitable for mission-critical server, storage, and telecom infrastructure where uptime and fault tolerance are essential.