Renesas 89H24NT24G2ZAHL8

Overview

89H24NT24G2ZAHL8 from Integrated Device Technology is an evaluation board (EVB) designed for the IDT PES24NT24G2 PCIe Gen2 24-lane, 24-port inter-domain switch. It provides full-lane breakout to Mezzanine and SAS connectors, supports configurable clocking (100/125 MHz), SMBus-based EEPROM programming, JTAG debug access, and hot-plug-capable downstream PCIe slot configurations - enabling validation of fan-out, NTB, DMA, and multi-partition switching in server and storage systems.

For engineers reviewing the 89H24NT24G2ZAHL8 datasheet, 89H24NT24G2ZAHL8 pinout, 89H24NT24G2ZAHL8 application, or 89H24NT24G2ZAHL8 equivalent, this page delivers verified hardware configuration options, power sequencing requirements, reference clock sourcing paths, reset behavior, and adapter compatibility details essential for PCIe switch integration and system-level validation.

Technical Context

The 89H24NT24G2ZAHL8 implements a complete hardware testbed for the PES24NT24G2 switch IC, featuring dual differential global reference clock inputs (mandatory 100/125 MHz), local port clock muxing for ports 8 and 16, and flexible CLKMODE[1:0]-controlled common/non-common clock mode selection per port group. All 24 lanes are routed to four Mezzanine connectors and two iSAS interfaces with SMA clock monitoring points.

Power delivery includes five dedicated regulators: 1.0V VDDCORE, 1.0V VDDPEA, 1.0V VDDPETA, 2.5V VDDPEHA, and 3.3V VDDIO - with strict VDDCORE ramping ≤1.0V below VDDIO. Reset architecture supports both fundamental PERST# propagation and downstream hot-reset via SMBus-controlled GPIOs.

Key Specifications

Availability

89H24NT24G2ZAHL8 is available at Aetrix Electronics and suitable for PCIe switch validation, server backplane prototyping, storage subsystem testing, and NTB-based multi-root system development requiring stable component supply and long-term evaluation platform availability.

Supply support for 89H24NT24G2ZAHL8 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 (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions for datacenter, communications, and industrial applications.

The 89H24NT24G2ZAHL8 belongs to IDT's PCIe Inter-Domain Switch Evaluation Platform family, engineered specifically to accelerate validation of PES-series switches in real-world topologies including fan-out, peer-to-peer, and NTB configurations.

FAQ

What is the primary function of the 89H24NT24G2ZAHL8 evaluation board?

The 89H24NT24G2ZAHL8 is a dedicated evaluation platform for the IDT PES24NT24G2 PCIe Gen2 24-port switch. It enables hardware and firmware validation of lane bifurcation, port aggregation, NTB operation, local clocking modes, and multi-partition configuration - not a standalone IC or production component. All board-level features serve direct characterization of the PES24NT24G2 device under realistic system conditions.

Does the 89H24NT24G2ZAHL8 include the PES24NT24G2 switch IC?

Yes, the 89H24NT24G2ZAHL8 evaluation board has the PES24NT24G2 PCIe switch IC physically mounted on the main PCB (DUT on bottom side, per Figure 2.5). The board provides full electrical and mechanical access to all 24 lanes, reference clocks, power rails, SMBus, and JTAG - allowing complete functional and timing validation of the switch IC itself.

What clock frequencies does the 89H24NT24G2ZAHL8 support for the PES24NT24G2 device?

The 89H24NT24G2ZAHL8 supports both 100 MHz and 125 MHz global reference clock inputs for the PES24NT24G2, selected via SW10[2] (Global Clock Frequency Switch) and S10[1] (Onboard Clock Generator Frequency Switch). Local port clocks for ports 8 and 16 must be 100 MHz only, as required by the PES24NT24G2 specification.

How is power delivered and sequenced on the 89H24NT24G2ZAHL8 board?

Power is delivered via a 24-pin Molex EPS12V connector (J69) supplying +12V3, +5V, +3.3V, 5VSB, and PS_ON. Five dedicated regulators generate VDDCORE (1.0V), VDDPEA (1.0V), VDDPETA (1.0V), VDDPEHA (2.5V), and VDDIO (3.3V). Critical sequencing requires VDDCORE to remain at least 1.0V below VDDIO during ramp-up - enforced by regulator design and layout.

Can the 89H24NT24G2ZAHL8 be used to validate NTB (Non-Transparent Bridge) functionality?

Yes, the 89H24NT24G2ZAHL8 explicitly supports NTB validation: up to eight ports can be configured as NTB ports per the PES24NT24G2 datasheet, and the board's software tools (GUI register editor and EEPROM binary generator) allow full configuration of NTB address translation, doorbell registers, and scratchpad memory - confirmed in Chapter 1 and Board Features section.