Renesas 89H32NT24AG2ZAHLG8

Overview

89H32NT24AG2ZAHLG8 from IDT is a 32-lane, 24-port PCI Express Gen2 system interconnect switch with non-transparent bridging (NTB), switch partitioning, and integrated DMA controllers. It delivers up to 32 GBps switching capacity, supports 5.0 GT/s per lane, and operates in servers, storage systems, and intelligent I/O subsystems requiring multi-domain PCIe communication.

For engineers reviewing the 89H32NT24AG2ZAHLG8 datasheet, 89H32NT24AG2ZAHLG8 pinout, 89H32NT24AG2ZAHLG8 application, or 89H32NT24AG2ZAHLG8 equivalent, key selection considerations include NTB endpoint count (up to 8), switch partition support (up to 8 independent logical switches), SerDes configuration flexibility (de-emphasis, equalization, drive strength), hot-plug controller integration per downstream port, and compliance with PCI Express Base Specification 2.1 including AER, ECRC, ACS, and multicast.

Technical Context

The 89H32NT24AG2ZAHLG8 implements a Combined Input Output Queued (CIOQ) switch core with large buffers and low-latency cut-through architecture. It integrates eight non-transparent bridge endpoints, each with six BARs supporting 32/64-bit address translation and two lookup-table-based BARs for segmented aperture mapping.

It supports dynamic reconfiguration of switch partitions-including port migration and movable upstream ports-and provides two integrated DMA controllers, each with two channels supporting memory-to-memory transfers across partitions via NTB. Clocking supports 100 MHz or 125 MHz reference inputs with common, non-common, and local port clock modes.

Key Specifications

Pinout & Package

Packaged in a 23 mm × 23 mm 484-ball Flip Chip BGA with 1 mm ball spacing. Pin functions include 24 differential PCIe SerDes lanes (ports 0–23), dual SMBus interfaces (master/slave), 9 GPIOs with multiple alternate functions (e.g., partition reset, link status, failover), reference clock inputs (global and per-port), JTAG test pins, and system control signals (PERSTN, RSTHALT, SWMODE).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 89H32NT24AG2ZAHLG8, the base part 89HPES32NT24AG2 lacks packaging and temp grade specification, while ZAMLG8 extends operational range at the cost of higher procurement cost and longer lead time - making ZAHLG8 optimal for volume commercial server/storage builds.

Availability

89H32NT24AG2ZAHLG8 is available at Aetrix Electronics and suitable for enterprise storage arrays, multi-host server backplanes, intelligent I/O acceleration cards, and communications infrastructure blades requiring stable component supply and long-term lifecycle support.

Supply support for 89H32NT24AG2ZAHLG8 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 high-performance timing, memory interface, RF, and PCIe interconnect solutions, acquired by Renesas Electronics in 2019.

The 89H32NT24AG2ZAHLG8 belongs to IDT's PES (PCI Express Switch) family, designed specifically for high-throughput, multi-domain PCIe system interconnects in servers, storage, and communications infrastructure.

FAQ

What is the maximum PCIe link speed supported by the 89H32NT24AG2ZAHLG8?

The 89H32NT24AG2ZAHLG8 supports PCIe Gen2 operation at 5.0 GT/s per lane, with full backward compatibility to Gen1 at 2.5 GT/s. Its integrated SerDes complies with PCI Express Base Specification 2.1 and supports automatic per-port link width negotiation from x8 down to x1.

How many non-transparent bridge (NTB) endpoints does the 89H32NT24AG2ZAHLG8 support?

The 89H32NT24AG2ZAHLG8 supports up to 8 NTB endpoints, each with six BARs for address translation, 32 doorbell registers, and 4 message registers. This enables simultaneous inter-domain communication between up to 8 independent PCIe roots or CPUs.

Does the 89H32NT24AG2ZAHLG8 support hot-plug on all ports?

Yes, the 89H32NT24AG2ZAHLG8 integrates a hot-plug controller on all 23 downstream ports (ports 1–23). It uses an external I²C I/O expander connected via the SMBus master interface to manage presence detection, power sequencing, and event notification with minimal pin count.

What package type and dimensions does the 89H32NT24AG2ZAHLG8 use?

The 89H32NT24AG2ZAHLG8 is housed in a 484-ball Flip Chip BGA package measuring 23 mm × 23 mm with 1 mm ball pitch. This package supports high-density routing and thermal dissipation requirements typical of server and storage applications.

Can the 89H32NT24AG2ZAHLG8 be configured into multiple independent switch partitions?

Yes, the 89H32NT24AG2ZAHLG8 supports up to 8 fully independent switch partitions. Each partition operates as a logically isolated switch with configurable downstream port numbering and supports dynamic reconfiguration - including port migration and upstream port movement - without system reset.