Renesas 89H48H12G2ZDBLI

Overview

89H48H12G2ZDBLI from Integrated Device Technology, Inc. is a 48-lane, 12-port PCI Express Gen2 system interconnect switch optimized for high-throughput, low-latency packet switching in servers and storage systems. It delivers 384 Gbps aggregate bandwidth, supports x4/x8 port configurations with lane merging, implements PCIe Base Specification 2.0, and features cut-through latency architecture.

For engineers reviewing the 89H48H12G2ZDBLI datasheet, 89H48H12G2ZDBLI pinout, 89H48H12G2ZDBLI application, or 89H48H12G2ZDBLI equivalent, key selection considerations include Gen2 5.0 GT/s SerDes performance, switch partitioning capability, hot-plug controller integration per downstream port, and support for up to 12 independent logical partitions with dynamic reconfiguration.

Technical Context

The 89H48H12G2ZDBLI implements a non-blocking, layered PCIe switch architecture with separate Physical, Data Link, and Transaction layers compliant with PCIe Base Spec 2.0. It supports both store-and-forward and cut-through forwarding modes, eight traffic classes (TCs), and one virtual channel (VC) with end-to-end CRC and advanced error reporting on all ports.

Its partitioning engine enables runtime creation of up to 12 logically isolated switch domains, each with independent upstream/downstream port assignment, device numbering, and fundamental reset control via dedicated GPIO pins. Clocking supports 100 MHz or 125 MHz reference inputs with common, non-common, and local port clocking modes including SSC.

Key Specifications

Pinout & Package

Packaged in a 27 mm × 27 mm 676-ball Flip Chip BGA with 1 mm ball pitch. Pin functions include 48 differential PCIe SerDes lanes across 12 ports (PE00–PE09, PE12–PE13), dual differential reference clocks (GCLKN/GCLKP, P[2,0]CLKN/P[2,0]CLKP), master/slave SMBus interfaces, 9 GPIOs with alternate functions (e.g., PART0PERSTN, IOEXPINTN), merge control pins (P01MERGEN–P1213MERGEN), JTAG test interface, and dedicated power/ground/resistor pins (VDDCORE, VDDI/O, REFRES[13,12,9:0], REFRESPLL).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 89HPES48H12G2 and 89H48H12G2ZDBLIT, the 89H48H12G2ZDBLI provides identical switching functionality and pin compatibility while being specifically qualified for extended temperature operation and standard tray packaging-making it optimal for industrial and embedded deployments requiring long-term reliability validation.

Availability

89H48H12G2ZDBLI is available at Aetrix Electronics and suitable for enterprise storage arrays, multi-host server backplanes, and communications packet processing systems requiring stable component supply, long lifecycle support, and traceable sourcing.

Supply support for 89H48H12G2ZDBLI 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 PCIe interconnect solutions for high-performance computing and communications infrastructure.

The 89H48H12G2ZDBLI belongs to IDT's PRECISE™ family of PCIe switching solutions, designed specifically to address scalability, partitioning, and RAS requirements in next-generation servers, storage, and intelligent I/O subsystems.

FAQ

What is the maximum PCIe link speed supported by the 89H48H12G2ZDBLI?

The 89H48H12G2ZDBLI supports PCIe Gen2 with a maximum link speed of 5.0 GT/s per lane, compliant with the PCI Express Base Specification 2.0. It does not support Gen3 (8.0 GT/s) or higher speeds. Each of its 48 lanes operates bidirectionally at this rate, delivering up to 384 Gbps aggregate full-duplex bandwidth.

Does the 89H48H12G2ZDBLI support hot-plug functionality on all ports?

Yes, the 89H48H12G2ZDBLI integrates a hot-plug controller on every downstream port. It relies on external I²C I/O expanders connected via its SMBus master interface (MSMBCLK/MSMBDAT) to manage presence detect, power sequencing, and event notification-including GPE output for SCI/SMI generation to support legacy OS hot-plug handling.

How many independent PCIe switch partitions can the 89H48H12G2ZDBLI support?

The 89H48H12G2ZDBLI supports up to 12 fully independent switch partitions. Partition configuration is controlled via SWMODE pins and software registers, enabling dynamic port reassignment, upstream port mobility between partitions, and runtime migration of downstream ports without system reset.

What power supply voltages are required for the 89H48H12G2ZDBLI?

The 89H48H12G2ZDBLI requires three primary supply domains: 1.0 V for VDDCORE and VDDPEA/VDDPETA (core and SerDes analog), 2.5 V for VDDI/O (I/O buffers), and 2.5 V or preferably 3.3 V for VDDI/O. No strict power sequencing is mandated, simplifying board-level power design.

Is the 89H48H12G2ZDBLI pin-compatible with other members of the IDT PRECISE™ PCIe switch family?

No, the 89H48H12G2ZDBLI is not pin-compatible with other PRECISE™ switches such as the 89H32H12G2 or 89H24H12G2 due to differences in lane count, port count, and BGA ball mapping. Its 676-ball Flip Chip BGA package and 48-lane routing require unique PCB layout; migration requires redesign.