Renesas 89HT0808PZAABGI8

Overview

89HT0808PZAABGI8 from Integrated Device Technology is an 8-channel PCIe® 3.0 signal retimer/conditioner that eliminates random and deterministic jitter, compensates for PCB trace and cable attenuation up to 8 Gbps, and supports per-lane de-emphasis, CTLE, and 5-tap DFE equalization for high-reliability server backplane interconnects.

For engineers reviewing the 89HT0808PZAABGI8 datasheet, 89HT0808PZAABGI8 pinout, 89HT0808PZAABGI8 application, or 89HT0808PZAABGI8 equivalent, key selection criteria include PCIe Gen 3 compliance, 8-Gbps per-channel operation, I²C-configurable lane-level SerDes tuning, and integrated RAS features including end-to-end parity and physical-layer error accounting.

Technical Context

The 89HT0808PZAABGI8 implements a full-rate retiming architecture with independent PLLs per channel, supporting PCIe Base Specification 3.0, 2.1, and 1.1 at 2.5/5.0/8.0 Gbps. It integrates a multi-stage receiver (CTLE + 5-tap DFE) and a transmit driver with up to 8 dB de-emphasis.

Its clocking subsystem accepts a standard 100 MHz PCIe reference clock and supports both spread-spectrum (SSCLK) and non-SSCLK modes in common- and non-common-clock configurations. The device uses dedicated master/slave I²C interfaces for EEPROM-based configuration loading and CSR space exposure.

Key Specifications

Pinout & Package

Packaged in a 9 mm × 9 mm, 100-ball BGA with 0.8 mm ball pitch (RoHS-compliant, Pb-free).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar signal retiming applications.

Compared with 89HT0808PZAABGI8, the 89HT0816PZAABGI8 offers lane scalability within identical thermal and layout constraints, whereas the PI7C9X2G608GP trades Gen 3 capability and RAS depth for lower unit cost in legacy infrastructure.

Availability

89HT0808PZAABGI8 is available at Aetrix Electronics and suitable for server backplane interconnects, enterprise storage expansion, communications equipment chassis, and high-performance computing rack applications requiring stable component supply and long-term lifecycle support.

Supply support for 89HT0808PZAABGI8 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, designs high-performance timing, interface, and memory solutions for data center, communications, and industrial markets.

The 89HT0808PZAABGI8 belongs to IDT's PCIe signal integrity product line, engineered specifically to extend reach and reliability of Gen 3 serial links in thermally demanding, high-density server and storage platforms.

FAQ

What PCIe generations does the 89HT0808PZAABGI8 support?

The 89HT0808PZAABGI8 supports PCIe Base Specification 3.0, 2.1, and 1.1 at native data rates of 8.0 Gbps, 5.0 Gbps, and 2.5 Gbps respectively. It maintains full protocol compliance across all three generations, including LTSSM behavior, link training sequences, and electrical layer requirements - verified per PCI-SIG compliance test plans. The 89HT0808PZAABGI8 does not support PCIe 4.0 or later.

Does the 89HT0808PZAABGI8 require an external EEPROM for operation?

Yes, the 89HT0808PZAABGI8 relies on an external EEPROM connected to its dedicated I²C master interface (SCL_M/SDA_M) for initial configuration loading at power-up. This EEPROM stores device-specific settings including lane mapping, de-emphasis levels, and equalizer coefficients. The 89HT0808PZAABGI8 will not complete link training without valid EEPROM content.

How does the 89HT0808PZAABGI8 handle hot-plug events?

The 89HT0808PZAABGI8 fully supports PCIe hot-plug per specification, including detection of presence change, power sequencing, and link retraining. Its fast-acquisition PLL achieves sub-2 μs L0s exit, and per-lane SerDes independently negotiates link width (x1/x4) upon reinsertion. The 89HT0808PZAABGI8 also reports hot-plug status via I²C-accessible registers for system-level event logging.

Can the 89HT0808PZAABGI8 operate with non-common clock (NCC) topology?

Yes, the 89HT0808PZAABGI8 supports both common clock (CC) and non-common clock (NCC) PCIe configurations. In NCC mode, it accepts individual REFCLK inputs per lane group and performs clock compensation internally. This allows deployment in legacy backplanes where reference clock distribution is not synchronized across slots - a capability confirmed in IDT's 89HT0808P Product Brief Rev. 1.0.

What RAS features are implemented in the 89HT0808PZAABGI8?

The 89HT0808PZAABGI8 implements three hardware RAS features: (1) physical-layer error detection and counting per lane, (2) end-to-end data path parity protection across the entire retiming pipeline, and (3) checksum validation of EEPROM configuration contents. These features are accessible via I²C or JTAG and enable proactive failure prediction and field diagnostics - critical for enterprise-class 89HT0808PZAABGI8 deployments.