Renesas 89H24NT24G2ZAHL

Overview

89H24NT24G2ZAHL from Integrated Device Technology, Inc. is an evaluation board (EB-LOGAN-19) designed for the IDT PES24NT24G2 PCIe 2.1 Gen2 24-lane, 24-port inter-domain switch. It supports x1/x2/x4/x8 lane configurations, NTB multi-root operation, and local port clocking. The board enables full hardware validation of PCIe switching in server and storage systems with up to 23 downstream ports via 12PACK daughter boards.

For engineers reviewing the 89H24NT24G2ZAHL datasheet, 89H24NT24G2ZAHL pinout, 89H24NT24G2ZAHL application, or 89H24NT24G2ZAHL equivalent, this page provides verified technical context, power sequencing requirements, clock configuration options (100/125 MHz global reference), SMBus master/slave interfaces, JTAG debug access, and PCIe mezzanine breakout capabilities - all critical for PCIe switch integration and system-level interoperability testing.

Technical Context

The 89H24NT24G2ZAHL evaluation board implements the PES24NT24G2 switch in a fully routable PCIe 2.1 Gen2 topology, supporting automatic lane reversal, polarity inversion, and per-port link width negotiation (x1–x8). It delivers up to 2048-byte payload size and enables partitioned NTB mode for multi-root I/O virtualization.

Reference clocking is configurable via SMA inputs, onboard ICS841484 generator (100 MHz default), or SATA connectors, with dual mandatory differential clocks (CLK0/CLK1) sourced identically. Power delivery includes dedicated regulators for VDDCORE (1.0 V), VDDPEA (1.0 V), VDDPETA (1.0 V), VDDPEHA (2.5 V), and VDDIO (3.3 V), with strict VDDCORE ≤ VDDIO – 1.0 V during ramp-up.

Key Specifications

Availability

89H24NT24G2ZAHL is available at Aetrix Electronics and suitable for PCIe switch evaluation, server backplane validation, storage subsystem prototyping, and NTB-based multi-root I/O virtualization requiring stable component supply and full hardware test coverage.

Supply support for 89H24NT24G2ZAHL 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 high-performance interconnect solutions for datacenter, communications, and industrial applications.

The 89H24NT24G2ZAHL belongs to IDT's PCIe Inter-Domain Switch evaluation platform family, engineered to accelerate validation of high-density PCIe fan-out, peer-to-peer switching, and NTB-enabled multi-host architectures in enterprise infrastructure.

FAQ

What is the primary function of the 89H24NT24G2ZAHL evaluation board?

The 89H24NT24G2ZAHL evaluation board is the EB-LOGAN-19 platform designed specifically for evaluating the IDT PES24NT24G2 PCIe 2.1 Gen2 24-lane, 24-port inter-domain switch. It provides full hardware access to all 24 lanes via mezzanine and SAS connectors, supports NTB multi-root operation, and enables comprehensive testing of lane bifurcation, clocking modes, SMBus configuration, and power sequencing - all essential for validating PCIe switch behavior in server and storage systems before production deployment.

Does the 89H24NT24G2ZAHL support PCIe Gen3 or higher speeds?

No, the 89H24NT24G2ZAHL is designed exclusively for the PES24NT24G2 switch, which complies only with PCI Express Base Specification Revision 2.1 (Gen2) at 5 GT/s. It does not support Gen3 (8 GT/s) or later revisions. The board's clocking architecture, SerDes termination, and signal integrity layout are optimized for Gen2 signaling, and no firmware or hardware modification enables Gen3 operation.

How many downstream PCIe endpoints can be connected using the 89H24NT24G2ZAHL?

The 89H24NT24G2ZAHL supports up to 23 downstream PCIe endpoints when used with two IDT 12PACK daughter boards. In its base configuration, the main board provides four physical PCIe slots; adding the 12PACK boards expands total slot count to 24, with one port reserved as upstream. Each slot is mechanically open-ended to accept x16 cards, and lane widths (x1/x2/x4/x8) are software-configurable per port via the PES24NT24G2's register set.

What clock sources are available on the 89H24NT24G2ZAHL for the PES24NT24G2 switch?

The 89H24NT24G2ZAHL offers three clock source options for the PES24NT24G2: (1) external differential reference clocks via SMA connectors (J17/J20/J66/J67), (2) onboard ICS841484 clock generator (U49) outputting fixed 100 MHz, or (3) SATA connectors (J21/J22/J8) delivering 100/125 MHz. Dual global clocks (CLK0/CLK1) must originate from the same source, and local port clocks (e.g., for ports 8/16) are selectable via DIP switches S17/S19 and routed through dedicated clock muxes (U118/U120).

Is the 89H24NT24G2ZAHL compatible with standard PCIe host systems?

Yes, the 89H24NT24G2ZAHL is compatible with standard PCIe host systems featuring a root complex and at least one x1 PCIe slot. It connects via IDT-provided edge-to-SATA adapters and iSAS-to-SATA breakout cables, enabling plug-and-play integration into servers or workstations running Windows Server 200x, Windows XP/Vista, or Linux. The board includes warm reset pushbutton, status LEDs, and JTAG for low-level debugging - all aligned with industry-standard PCIe development workflows.