Renesas 89H24NT24G2ZAHLGI8

Overview

89H24NT24G2ZAHLGI8 from IDT is an evaluation board (EB-LOGAN-19) designed for the 89HPES24NT24G2 PCIe 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 89H24NT24G2ZAHLGI8 datasheet, 89H24NT24G2ZAHLGI8 pinout, 89H24NT24G2ZAHLGI8 application, or 89H24NT24G2ZAHLGI8 equivalent, this page delivers verified technical context, power sequencing requirements, clock configuration options (100/125 MHz global reference, local port clock support), and adapter-based PCIe topology testing capabilities - all specific to the EB-LOGAN-19 platform.

Technical Context

The 89H24NT24G2ZAHLGI8 evaluation board implements the IDT 89HPES24NT24G2 switch in a fully routed, test-ready configuration. It provides dual SMA clock inputs, onboard ICS841484 clock generator (100 MHz default), and configurable clock muxing for ports 8 and 16 via DIP switches S17/S19 and jumpers J18/J19.

Power delivery includes five dedicated regulators: 1.0 V VDDCORE (U59), 1.0 V VDDPEA (U62), 1.0 V VDDPETA (U68), 2.5 V VDDPEHA (U65), and 3.3 V VDDIO (U56), with strict VDDCORE ≤ VDDIO – 1.0 V during ramp-up. Reset is supported via fundamental PERST# and downstream hot-reset signals.

Key Specifications

Availability

89H24NT24G2ZAHLGI8 is available at Aetrix Electronics and suitable for PCIe switch validation, server/storage interconnect prototyping, and NTB multi-root system development requiring stable component supply and full hardware debug access.

Supply support for 89H24NT24G2ZAHLGI8 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) was a fabless semiconductor company specializing in timing, memory interface, RF, and PCIe connectivity solutions before its acquisition by Renesas Electronics in 2019.

The 89H24NT24G2ZAHLGI8 is part of IDT's PCIe Inter-Domain Switch evaluation platform family, engineered specifically for high-performance data center and enterprise storage applications requiring scalable, low-latency PCIe fan-out and peer-to-peer switching.

FAQ

What is the primary function of the 89H24NT24G2ZAHLGI8 evaluation board?

The 89H24NT24G2ZAHLGI8 is the EB-LOGAN-19 evaluation board for the IDT 89HPES24NT24G2 PCIe Gen2 switch. Its primary function is to enable hardware-level validation of the switch's full feature set - including 24-port configuration, NTB multi-root operation, local port clocking, and PCIe topology flexibility - using mezzanine adapters, 12PACK daughter boards, and host system integration.

Does the 89H24NT24G2ZAHLGI8 include the 89HPES24NT24G2 switch IC?

Yes, the 89H24NT24G2ZAHLGI8 evaluation board has the 89HPES24NT24G2 switch IC physically mounted on the main board (DUT on bottom side per Figure 2.5). All 24 PCIe lanes are broken out to mezzanine and SAS connectors, and the board includes full power regulation, clock distribution, reset control, and debug interfaces required to operate the switch.

What clock sources does the 89H24NT24G2ZAHLGI8 support for the 89HPES24NT24G2 device?

The 89H24NT24G2ZAHLGI8 supports three clock source options: (1) external differential clocks via SMA connectors (J17/J20, J66/J67), (2) onboard ICS841484 clock generator (U49) outputting 100 MHz by default, and (3) SATA connectors (J21/J22, J62/J64) as clock input sources. Global clock frequency is selectable between 100 MHz and 125 MHz via SW10[2].

How is power delivered and sequenced on the 89H24NT24G2ZAHLGI8 board?

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

Can the 89H24NT24G2ZAHLGI8 be used for NTB (Non-Transparent Bridge) applications?

Yes, the 89H24NT24G2ZAHLGI8 supports NTB functionality as implemented by the underlying 89HPES24NT24G2 switch. Up to eight ports can be configured as NTB ports for multi-root PCIe topologies. The board enables full register-level configuration and validation of NTB address translation, doorbell registers, and scratchpad memory via the provided GUI software and SMBus EEPROM programming tools.