Renesas 89H24NT6AG2ZAHLI8

Overview

89H24NT6AG2ZAHLI8 from IDT is a 24-lane, 6-port PCI Express Gen2 system interconnect switch with Non-Transparent Bridging (NTB) and Switch Partitioning capabilities. It delivers up to 24 GBps switching capacity, supports 5.0 GT/s link speed per lane, and operates in servers, storage systems, and intelligent I/O subsystems requiring multi-domain peer-to-peer communication.

For engineers reviewing the 89H24NT6AG2ZAHLI8 datasheet, 89H24NT6AG2ZAHLI8 pinout, 89H24NT6AG2ZAHLI8 application, or 89H24NT6AG2ZAHLI8 equivalent, key selection criteria include NTB endpoint count (up to 6), partitioned switch configuration flexibility, PCIe Base Specification 2.1 compliance, and support for dynamic port reconfiguration across partitions.

Technical Context

The 89H24NT6AG2ZAHLI8 implements a Combined Input Output Queued (CIOQ) switch core with large buffers and low-latency cut-through forwarding. Its integrated SerDes supports both Gen1 (2.5 GT/s) and Gen2 (5.0 GT/s) operation, with per-lane configuration for de-emphasis, receive equalization, and drive strength.

It features dual SMBus interfaces (master and slave), on-die temperature sensing (0–127.5°C), and IEEE 1149.1/1149.6 JTAG support. The device enables up to 6 independent switch partitions, each configurable with downstream port numbering and movable upstream ports - enabling true multi-host domain isolation without external logic.

Key Specifications

Pinout & Package

Package: 484-ball Flip Chip BGA (23 mm × 23 mm, 1.0 mm pitch). Ball map includes six PCIe x4 ports (Port 0, 2, 4, 6, 8, 12), dual differential reference clocks (global and per-port), dual SMBus interfaces, 9 GPIOs with alternate functions (e.g., PARTxPERSTN, P0LINKUPN), JTAG test pins, and dedicated power/ground balls for VDDCORE, VDDI/O, VDDPEA, VDDPEHA, VDDPETA, and VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 89H24NT6AG2ZAHLI8, the ZCBLI8 variant trades junction temperature margin for cost and thermal simplicity, while the 32-lane alternative extends scalability at the expense of PCB real estate and power - making the 89H24NT6AG2ZAHLI8 optimal for balanced performance, density, and extended-temperature robustness in mission-critical infrastructure.

Availability

89H24NT6AG2ZAHLI8 is available at Aetrix Electronics and suitable for enterprise storage arrays, multi-host server backplanes, intelligent I/O accelerators, and carrier-grade communications equipment requiring stable component supply across long product lifecycles.

Supply support for 89H24NT6AG2ZAHLI8 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) is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions, acquired by Renesas Electronics in 2019.

The 89H24NT6AG2ZAHLI8 belongs to IDT's PCIe Express Switch family, designed specifically for high-reliability, multi-domain system interconnect in datacenter and telecom infrastructure where NTB and partitioning are essential.

FAQ

What is the maximum PCIe link speed supported by the 89H24NT6AG2ZAHLI8?

The 89H24NT6AG2ZAHLI8 supports PCIe Gen2 with a maximum link speed of 5.0 GT/s per lane. It is fully compliant with the PCI Express Base Specification 2.1 and maintains backward compatibility with Gen1 (2.5 GT/s) links. Each of its 24 lanes operates independently at either speed, depending on negotiation with connected endpoints.

Does the 89H24NT6AG2ZAHLI8 support Non-Transparent Bridging (NTB)?

Yes, the 89H24NT6AG2ZAHLI8 natively supports NTB with up to 6 independent NTB endpoints. Each endpoint provides 6 BARs for address translation, 32 doorbell registers for event signaling, and 4 message registers for mailbox-style communication - enabling secure, memory-isolated data exchange between separate PCIe domains.

How many independent switch partitions can be configured on the 89H24NT6AG2ZAHLI8?

The 89H24NT6AG2ZAHLI8 supports up to 6 fully independent switch partitions. These partitions operate as logically isolated switches sharing the same silicon, with configurable downstream port numbering and dynamic port migration - allowing runtime reconfiguration without device reset.

What reference clock frequencies does the 89H24NT6AG2ZAHLI8 accept?

The 89H24NT6AG2ZAHLI8 accepts 100 MHz or 125 MHz differential reference clock inputs, selected via the GCLKFSEL pin. It supports multiple clocking modes including common clock, non-common clock, and local port clock with spread-spectrum capability - accommodating diverse board-level clock distribution schemes.

Is the 89H24NT6AG2ZAHLI8 pin-compatible with other members of the PES24NT6AG2 family?

Yes, the 89H24NT6AG2ZAHLI8 shares identical pinout and package (484-ball FC-BGA, 23 mm × 23 mm) with all variants in the PES24NT6AG2 family, including ZCBLI8 and ZABLIG8. Differences are limited to temperature grade, ball finish, and marking - enabling drop-in replacement where thermal and reliability requirements align.

What power supply voltages are required for the 89H24NT6AG2ZAHLI8?

The 89H24NT6AG2ZAHLI8 requires three distinct power supplies: 1.0V for core logic (VDDCORE), 2.5V for high-power SerDes analog circuitry (VDDPEHA), and 3.3V for I/O buffers (VDDI/O). Additional 1.0V rails (VDDPEA, VDDPETA) power SerDes analog and transmitter sections - all must meet tight tolerance and sequencing requirements per datasheet.