Renesas 89H32NT8AG2ZAHLGI8

Overview

89H32NT8AG2ZAHLGI8 from IDT is a 32-lane, 8-port PCI Express Gen2 system interconnect switch with Non-Transparent Bridging (NTB), supporting up to 8 independent switch partitions, 5 GT/s per lane, and integrated DMA controllers. It serves as a high-performance packet-switching fabric in multi-host server, storage, and communications control plane systems requiring peer-to-peer traffic isolation and domain-crossing data exchange.

For engineers reviewing the 89H32NT8AG2ZAHLGI8 datasheet, 89H32NT8AG2ZAHLGI8 pinout, 89H32NT8AG2ZAHLGI8 application, or 89H32NT8AG2ZAHLGI8 equivalent, key selection criteria include NTB endpoint count (up to 8), dynamic partition reconfiguration capability, PCIe Gen2 compliance (Base Spec 2.1), SerDes lane reversal support, and integrated AER/ECRC for RAS-critical deployments.

Technical Context

The 89H32NT8AG2ZAHLGI8 implements a Combined Input Output Queued (CIOQ) switch core with large buffers and cut-through forwarding to minimize latency across 32 full-duplex Gen2 lanes. Its architecture supports per-port link width negotiation (x1/x2/x4/x8), automatic lane reversal, and flexible clocking modes including common clock, non-common clock, and local port clock with SSC.

Non-Transparent Bridging is implemented via dedicated NTB blocks per partition, each with 6 BARs (including lookup-table-based address translation on BAR2/BAR4), 32 doorbell registers, and 4 message registers. Integrated DMA controllers support memory-to-memory transfers across partitions using fly-by translation and linked-list descriptors.

Key Specifications

Pinout & Package

Packaged in a 23 mm × 23 mm 484-ball Flip Chip BGA with 1.0 mm ball pitch. Pinout details are defined by the 484-ball FC-BGA mechanical layout and signal assignment per IDT's 89HPES32NT8AG2 reference design; no public pin table is provided in available documentation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCIe Gen2 system interconnect switch applications.

Compared with 89H32NT8AG2ZAHLGI8, the 89H32NT24G2 scales port count and bandwidth for larger systems, while the 89H12NT8AG2 reduces lane count without sacrificing NTB or partitioning functionality-enabling tiered platform design with shared software and layout investment.

Availability

89H32NT8AG2ZAHLGI8 is available at Aetrix Electronics and suitable for server backplane interconnects, storage controller redundancy architectures, and communications control plane failover systems requiring stable component supply and long-term lifecycle support.

Supply support for 89H32NT8AG2ZAHLGI8 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

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

The 89H32NT8AG2ZAHLGI8 belongs to IDT's PES (PCI Express Switch) family, designed specifically to enable multi-host, high-availability PCIe systems with hardware-accelerated domain isolation, dynamic resource allocation, and robust RAS features.

FAQ

What is the PCIe generation and compliance standard supported by the 89H32NT8AG2ZAHLGI8?

The 89H32NT8AG2ZAHLGI8 is a PCI Express Gen2 device fully compliant with the PCI Express Base Specification 2.1. It supports 5.0 GT/s per lane in both directions, implements optional features including Advanced Error Reporting (AER), End-to-End CRC (ECRC), Access Control Services (ACS), and Multicast, and passes PCI-SIG interoperability validation for Gen2 root complex and endpoint roles.

Does the 89H32NT8AG2ZAHLGI8 support Non-Transparent Bridging, and how many NTB endpoints does it provide?

Yes, the 89H32NT8AG2ZAHLGI8 provides full Non-Transparent Bridging (NTB) support with up to 8 independently configurable NTB endpoints. Each endpoint includes 6 BARs (with lookup-table translation on BAR2/BAR4), 32 doorbell registers, and 4 message registers-enabling secure, low-latency inter-domain communication across up to 8 PCIe domains or CPUs.

How many switch partitions can the 89H32NT8AG2ZAHLGI8 support, and what is the significance of dynamic reconfiguration?

The 89H32NT8AG2ZAHLGI8 supports up to 8 fully independent switch partitions. Dynamic reconfiguration allows runtime migration of downstream ports between partitions, reallocation of upstream ports, and NTB endpoint remapping-all without reset or firmware reload. This enables hardware-level failover, bandwidth balancing, and flexible slot mapping in field-deployed systems.

What power supply voltages does the 89H32NT8AG2ZAHLGI8 require, and what power management features are implemented?

The 89H32NT8AG2ZAHLGI8 requires three dedicated supplies: 1.0 V for core logic, 2.5 V for I/O, and 3.3 V for auxiliary functions. It supports D0–D3 power states, Active State Power Management (ASPM) with configurable L0s/L1 timers, and SerDes power gating-turning off unused lanes and ports to reduce dynamic and leakage power in partial-load operation.

Is the 89H32NT8AG2ZAHLGI8 pin-compatible with other members of IDT's PES Gen2 switch family?

The 89H32NT8AG2ZAHLGI8 uses a 484-ball Flip Chip BGA package (23 mm × 23 mm, 1.0 mm pitch) that is not pin-compatible with the 676-ball 89H32NT24G2 or the smaller-footprint 89H12NT8AG2. However, its signal architecture, register map, firmware interface, and software APIs are fully compatible across the PES Gen2 family-enabling consistent driver development and system-level reuse.