Renesas 89HPES16T4AG2ZBALI

Overview

89HPES16T4AG2ZBALI from IDT is a 16-lane, 4-port PCI Express Gen2 switch IC designed for high-throughput server, storage, and networking systems. It delivers 128 Gbps full-duplex switching capacity, supports cut-through architecture with ≤150 ns latency, complies with PCIe Base Specification 2.0, and integrates sixteen 5 Gbps SerDes with on-chip packet buffering.

For engineers reviewing the 89HPES16T4AG2ZBALI datasheet, 89HPES16T4AG2ZBALI pinout, 89HPES16T4AG2ZBALI application, or 89HPES16T4AG2ZBALI equivalent, key selection criteria include upstream/downstream port configuration (x8/x4 or x4×4), SMBus master/slave interface support for EEPROM-based initialization, Hot-Plug I/O expander compatibility, RAS features including SECDED ECC on internal RAMs, and thermal design for 19 mm × 19 mm FCBGA324 package at up to 2.87 W max power dissipation.

Technical Context

The 89HPES16T4AG2ZBALI implements a layered PCIe 2.0-compliant architecture with independent Transaction, Data Link, and Physical layers per port. Its switch core supports both store-and-forward and cut-through modes, eight traffic classes, one virtual channel, and end-to-end parity protection on all TLPs - enabling deterministic latency and data integrity in mission-critical infrastructure.

It integrates dual SMBus interfaces (master address 0x50, slave address 0x77) for configuration register access and serial EEPROM programming, plus seven GPIO pins with alternate functions including P1RSTN, P2RSTN, P3RSTN, IOEXPINTN0, and GPEN - allowing flexible system-level control and Hot-Plug event handling via external I/O expanders.

Key Specifications

Pinout & Package

Packaged in a 19 mm × 19 mm, 324-ball Flip Chip BGA with 1 mm ball pitch. Pin functions validated per IDT DSC 6928 datasheet (June 2015).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 89HPES16T4AG2ZBALI, the ZCALI variant extends operational range for harsh environments without altering functionality, while the 89HPES8T3AG2ZBALI reduces lane count and package size - offering scalable PCIe fan-out where full 16-lane throughput is not required.

Availability

89HPES16T4AG2ZBALI is available at Aetrix Electronics and suitable for enterprise server I/O expansion, high-density storage controller design, and communications network switch fabric requiring stable component supply and long-term lifecycle support.

Supply support for 89HPES16T4AG2ZBALI 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, Inc.) is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance interconnect solutions, acquired by Renesas Electronics in 2019.

The 89HPES16T4AG2ZBALI belongs to IDT's PRECISE™ family of PCIe switching solutions, engineered specifically for high-bandwidth, low-latency infrastructure applications in servers, storage arrays, and carrier-grade networking equipment.

FAQ

What is the maximum supported PCIe link speed and generation for the 89HPES16T4AG2ZBALI?

The 89HPES16T4AG2ZBALI supports PCI Express Base Specification Revision 2.0 only, with a fixed 5 Gbps per lane data rate (Gen2). It does not support Gen3 (8 Gbps) or higher. All sixteen lanes operate at Gen2 speed, and automatic link training negotiates widths of x1, x2, x4, or x8 per port - but never beyond Gen2 electrical and protocol compliance.

Does the 89HPES16T4AG2ZBALI require external SerDes or transceivers?

No, the 89HPES16T4AG2ZBALI integrates sixteen fully compliant 5 Gbps PCIe Gen2 SerDes with built-in 8b/10b encoder/decoder, receive equalization (RxEQ), and transmitter de-emphasis. No external SerDes, retimers, or transceivers are needed - simplifying layout and reducing BOM cost compared to multi-chip PCIe switch implementations.

How does the 89HPES16T4AG2ZBALI implement Hot-Plug functionality on downstream ports?

The 89HPES16T4AG2ZBALI uses its master SMBus interface (address 0x50) to communicate with an external Hot-Plug I/O expander. On Hot-Plug state change, it issues SMBus writes to update expander outputs and reads inputs via interrupt-driven GPIO[2] (IOEXPINTN0), eliminating dedicated Hot-Plug controller pins and conserving package I/O resources.

What are the power supply requirements and sequencing constraints for the 89HPES16T4AG2ZBALI?

The 89HPES16T4AG2ZBALI requires five supplies: VDDCORE (0.9–1.1 V), VDDI/O (3.135–3.465 V), VDDPEA (0.95–1.1 V), VDDPEHA (2.25–2.75 V), and VDDPETA (0.95–1.1 V). During power-up, VDDCORE must remain at least 1.0 V below VDDI/O at all times; no other sequencing is mandated. Power-down may occur in any order.

Can the 89HPES16T4AG2ZBALI be configured to operate as a single x16 port instead of four separate ports?

No - the 89HPES16T4AG2ZBALI has fixed port topology: one upstream port (P0) and three downstream ports (P1–P3). However, P0 and P1 can be merged into a single x8 port using P01MERGEN, and P2 and P3 into another x8 port using P23MERGEN. True x16 operation across all 16 lanes is not supported; the device lacks x16-capable SerDes routing or link aggregation logic.