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Renesas 89HT0808PYAABI8
- Part No.:
- 89HT0808PYAABI8
- Manufacturer:
- Renesas
- Category:
- Specialized
- Package:
- 100-LFBGA
- Datasheet:
-
89HT0808PYAABI8.pdf
- Description:
- IC INTFACE SPECIALIZED 100FPBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,861
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Product details
Overview
89HT0808PYAABI8 from Integrated Device Technology (IDT) is a PCIe 3.0-compliant 8-channel signal retimer IC designed for high-speed serial link conditioning in server and storage backplanes. It supports 8.0 Gbps, 5.0 Gbps, and 2.5 Gbps data rates per lane, features CTLE + 5-tap DFE equalization, up to 8 dB transmit de-emphasis, and operates with a standard 100 MHz reference clock in common-clock topology.
For engineers reviewing the 89HT0808PYAABI8 datasheet, 89HT0808PYAABI8 pinout, 89HT0808PYAABI8 application, or 89HT0808PYAABI8 equivalent, key selection criteria include PCIe Gen 3/2/1 compliance, per-lane configurability (1x4/1x1/2x1), L0s/L1 ASPM power management support, I²C master/slave interface for EEPROM-based configuration, and RAS features including end-to-end parity and physical-layer error accounting.
Technical Context
The 89HT0808PYAABI8 implements a full SerDes-based retiming architecture with independent Rx/Tx paths per channel. Its multi-stage equalizer combines continuous-time linear equalization (CTLE) and a 5-tap decision-feedback equalizer (DFE) to compensate for deterministic ISI and frequency-dependent loss on FR4 PCB traces or passive cables.
It integrates a fast-acquisition PLL optimized for L0s exit timing, supports spread-spectrum clocking (SSCLK) and non-SSCLK modes, and provides dual I²C interfaces - one dedicated master for external EEPROM boot loading and one slave for runtime CSR access and firmware updates via system controller.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 8.0 Gbps (PCIe Gen 3), 5.0 Gbps (Gen 2), 2.5 Gbps (Gen 1) - enables backward-compatible deployment across PCIe generations |
| Channels | 8 differential lanes - supports x4, x1, or x2 link configurations with automatic per-port negotiation |
| Equalization | CTLE + 5-tap DFE - actively mitigates inter-symbol interference from trace/cable attenuation up to 30+ dB loss at Nyquist |
| Transmit De-emphasis | Up to 8 dB - programmable per lane to match channel loss profile and meet PCIe transmitter mask requirements |
| Power Management | L0s & L1 ASPM support - reduces dynamic power during low-activity states without breaking link integrity |
| Clock Input | 100 MHz differential reference clock - compatible with standard PCIe clock trees; supports common-clock and non-common-clock topologies |
| I²C Interface | Dual I²C ports (master + slave) - enables autonomous boot from external EEPROM and real-time register access by host controller |
Pinout & Package
Packaged in a 9 mm × 9 mm, 100-ball BGA with 0.8 mm ball pitch (RoHS-compliant, Pb-free). Ball map follows JEDEC MO-220 VDAA package outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK_IN_P/N | Differential reference clock input | Accepts 100 MHz LVDS/LVPECL clock; required for all link training and PLL lock |
| TXn_P/N, RXn_P/N (n=0–7) | Differential SerDes transmit/receive pairs | 8 bidirectional high-speed lanes; each independently configurable for de-emphasis, CTLE gain, DFE tap weights |
| SCL_M, SDA_M | I²C master interface | Loads initial configuration from external EEPROM at power-up; operates at 100 kHz or 400 kHz |
| SCL_S, SDA_S | I²C slave interface | Exposes global CSR space to host processor; supports runtime reconfiguration and diagnostics |
| PERST#, CLKREQ#, WAKE# | PCIe control signals | Support hot-plug detection, reset assertion, and wake event signaling per PCIe Base Spec 3.0 |
Key Features
| Feature | Design Value |
|---|---|
| Per-lane SerDes configuration | Independent TX de-emphasis, RX CTLE, and DFE settings per lane enable optimal tuning for asymmetric channel loss |
| Fast-acquisition PLL | Meets PCIe L0s exit timing (< 2 µs) while maintaining jitter tolerance under dynamic load conditions |
| End-to-end data path parity | Hardware-level CRC protection across retimer data path prevents undetected bit errors in mission-critical storage links |
| IEEE 1149.1/1149.6 JTAG support | Enables boundary-scan testing of high-speed SerDes I/O and AC-coupled interconnects during board-level validation |
| Automatic low-power lane gating | Unused SerDes lanes enter hardware-defined low-power state without software intervention, reducing idle power by >40% |
Applications
| Enterprise Storage Backplane | High-Density Server I/O Expansion |
|---|---|
Use Scenario: Long-reach PCIe connections between CPU IOH and NVMe drive trays over FR4 backplane with >20 dB insertion loss at 4 GHz. IC Role / Device Role / Timing Role: Signal retimer that restores eye opening, resets jitter budget, and ensures reliable Gen 3 link training across lossy interconnects. Use Value: Enables stable x4 PCIe Gen 3 operation at 8 GT/s where native link would fail due to deterministic jitter and amplitude degradation. | Use Scenario: Blade server midplane connecting compute modules to shared PCIe switch fabric with mixed-length traces. IC Role / Device Role / Timing Role: Per-lane reconditioning IC that compensates for trace skew and loss variation across 8 independent lanes. Use Value: Allows heterogeneous blade configurations without custom layout tuning; maintains BER <1e−12 across all active lanes. |
| PCIe Slot Extension for Workstations | Communications Equipment Line Cards |
Use Scenario: Desktop/workstation add-in card requiring PCIe extension beyond 6-inch trace limit using passive copper cable. IC Role / Device Role / Timing Role: Retiming repeater placed at cable receiver end to recover degraded signal before host root complex. Use Value: Eliminates need for active cables or custom equalized connectors; supports plug-and-play compatibility with standard PCIe endpoints. | Use Scenario: Carrier-grade router line card with multiple PCIe-based NICs connected via shared backplane with thermal and aging-induced impedance drift. IC Role / Device Role / Timing Role: Adaptive signal conditioner that continuously monitors and adjusts equalization to maintain link stability over temperature and lifetime. Use Value: Extends field reliability beyond 10 years by compensating for PCB material degradation and connector wear. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCIe retimer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 89HT0816P | 16-channel version in same 9×9 mm BGA; identical SerDes architecture and feature set | Targets higher-density backplanes requiring full x16 PCIe Gen 3 routing | Select when scaling from x8 to x16 lane count without changing board layout footprint |
| PI3EQX8908A | 8-channel PCIe 3.0 retimer from Diodes Inc.; supports only common-clock mode and lacks DFE | Lower-cost alternative for less demanding channels with <15 dB loss | Choose for cost-sensitive designs where CTLE-only equalization suffices and L0s exit timing is not critical |
Compared with 89HT0808PYAABI8, the 89HT0816P offers double lane density in identical packaging for scalable backplane designs, while the PI3EQX8908A trades DFE and advanced power management for lower BOM cost-making it suitable only for shorter, more benign interconnects.
Availability
89HT0808PYAABI8 is available at Aetrix Electronics and suitable for enterprise storage backplanes, high-density server I/O expansion, and PCIe slot extension applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for 89HT0808PYAABI8 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, is a fabless semiconductor company specializing in timing, memory interface, RF, and high-performance signal integrity solutions.
The 89HT0808PYAABI8 belongs to IDT's PCIe Signal Integrity product line, engineered specifically to extend reach and improve reliability of Gen 2/3 PCIe links in data center and telecom infrastructure.
FAQ
What PCIe generations does the 89HT0808PYAABI8 support?
The 89HT0808PYAABI8 supports PCIe Base Specification 3.0 (8.0 Gbps), 2.1 (5.0 Gbps), and 1.1 (2.5 Gbps) across all eight lanes. It performs full protocol-transparent retiming at each rate, including compliance with LTSSM behavior, SKP OS, and ordered-set generation required for Gen 3 link training. The 89HT0808PYAABI8 does not support PCIe Gen 4 or later.
Does the 89HT0808PYAABI8 require external configuration memory?
Yes, the 89HT0808PYAABI8 requires an external I²C EEPROM for initial configuration loading via its dedicated master I²C interface (SCL_M/SDA_M). The device boots from this EEPROM at power-on; default settings are not internally stored. Runtime configuration changes use the slave I²C port (SCL_S/SDA_S) to access internal CSRs.
Can the 89HT0808PYAABI8 operate in non-common-clock PCIe topologies?
Yes, the 89HT0808PYAABI8 supports both common-clock and non-common-clock PCIe configurations. In non-common-clock mode, it uses separate reference clocks for upstream and downstream links, enabling flexible clock tree design in multi-root complexes. SSCLK is supported only in common-clock mode per PCIe specification.
How does the 89HT0808PYAABI8 handle power management states like L0s and L1?
The 89HT0808PYAABI8 fully implements PCIe ASPM L0s and L1 states, including fast PLL relock on L0s exit (<2 µs) and deep power gating of unused SerDes lanes. It asserts CLKREQ# and monitors PERST# to coordinate state transitions with the link partner, maintaining compliance with PCIe Base Spec 3.0 Section 5.7.
Is JTAG debugging supported on the 89HT0808PYAABI8?
Yes, the 89HT0808PYAABI8 supports IEEE 1149.1 (standard JTAG) and IEEE 1149.6 (AC-JTAG) for boundary-scan testing of high-speed differential I/O. All internal registers-including per-lane diagnostic counters and SerDes test modes-are accessible via JTAG TAP controller, enabling comprehensive bring-up and failure analysis.
89HT0808PYAABI8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 100-LFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- Signal Retimer
- Interface:
- I2C
- Voltage - Supply:
- -
- Supplier Device Package:
- 100-CABGA (9x9)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
89HT0808PYAABI8 FAQ
1.How can I place an order for 89HT0808PYAABI8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 89HT0808PYAABI8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 89HT0808PYAABI8 reliable?
The price and inventory of 89HT0808PYAABI8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 89HT0808PYAABI8 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 89HT0808PYAABI8 transactions.
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4.How is shipping managed for 89HT0808PYAABI8?
89HT0808PYAABI8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 89HT0808PYAABI8 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 89HT0808PYAABI8?
For technical support, including 89HT0808PYAABI8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 89HT0808PYAABI8 requirements.
6.How does Aetrix verify that 89HT0808PYAABI8 is sourced from the original manufacturer or authorized distributors?
All 89HT0808PYAABI8 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 89HT0808PYAABI8 meets industry standards.
7.What is the process for return or replacement of 89HT0808PYAABI8?
All 89HT0808PYAABI8 units undergo pre-shipment inspection (PSI). If there is an issue with 89HT0808PYAABI8, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 89HT0808PYAABI8 part is unused and in its original packaging.
Return procedure for 89HT0808PYAABI8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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