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Texas Instruments XIO2001IZAJ
- Part No.:
- XIO2001IZAJ
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 144-TFBGA
- Datasheet:
-
XIO2001IZAJ.pdf
- Description:
- IC INTFACE SPECIALIZED 144NFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,262
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Product details
Overview
XIO2001IZAJ from Texas Instruments is a single-function PCI Express to PCI bus translation bridge in 144-ball ZAJ nFBGA package (7.0 mm × 7.0 mm), compliant with PCI Express Base Spec 2.0 and PCI Local Bus Spec 2.3. It delivers full ×1 PCIe throughput (250 MB/s bidirectional), supports six subordinate PCI bus masters, and integrates advanced error reporting with ECRC - deployed in enterprise server backplanes and industrial control chassis requiring legacy PCI expansion over modern PCIe infrastructure.
For engineers reviewing the XIO2001IZAJ datasheet, XIO2001IZAJ pinout, XIO2001IZAJ application, or XIO2001IZAJ equivalent, this page provides verified package mapping, validated ZAJ ball assignment, confirmed PCI/PCIe timing and voltage tolerances, and two documented alternative bridges for legacy PCI-to-PCIe migration paths.
Technical Context
The XIO2001IZAJ implements a robust pipeline architecture to minimize transaction latency between its upstream ×1 PCIe interface (250 MB/s full-duplex) and downstream 32-bit/66-MHz PCI bus. It supports simultaneous upstream (6 posted + 4 non-posted) and downstream (8 posted + 4 non-posted) transactions, with internal arbitration for up to six external PCI masters and configurable 2-level prioritization.
It features dual-reference clock support (100 MHz differential or 125 MHz single-ended), Active-State Power Management (L0s/L1), wake/beacon signaling, and integrated AUX power switching. All PCI I/O pins are 3.3-V/5.0-V tolerant (5.0-V only at 25/33 MHz), and six buffered PCI clock outputs (25/33/50/66 MHz) are provided with programmable selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PCIe Interface | ×1 lane, PCIe Base Spec 2.0 compliant, 250 MB/s bidirectional throughput - enables direct attachment to host CPU or root complex without switch overhead. |
| PCI Bus Support | 32-bit, 66-MHz max (25/33/50/66 MHz selectable), 3.3-V/5.0-V I/O tolerance - ensures interoperability with legacy PCI add-in cards and controllers. |
| Power Supplies | VDD_15 (1.5 V core), VDDA_15 (1.5 V analog), VDD_33 (3.3 V I/O), VDD_33_AUX - requires separate decoupling per rail; VAUX drain enabled only when main power is off. |
| Clock Inputs | REFCLK+ / REFCLK− (100 MHz diff) or REFCLK+ (125 MHz SE); REFCLK125_SEL pin selects mode - eliminates need for external clock generator in most designs. |
| Error Handling | PCIe Advanced Error Reporting with ECRC, PCI parity error forwarding, data poisoning - meets enterprise system RAS requirements for fault isolation and recovery. |
| Package | ZAJ nFBGA, 144-ball, 7.0 mm × 7.0 mm, 0.5 mm pitch - compact footprint optimized for high-density server and industrial PCB layouts. |
Pinout & Package
Package: 144-ball ZAJ nFBGA (7.0 mm × 7.0 mm, 0.5 mm pitch), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AD[31:0] | PCI Address/Data Bus | 32-bit multiplexed address/data lines for secondary PCI bus - supports burst transfers and memory-mapped I/O with full 66-MHz timing compliance. |
| RXP / RXN | PCIe Differential Receive Pair | High-speed input pair for ×1 PCIe link - accepts 100 MHz differential reference clock; requires controlled impedance (100 Ω ±10%) routing. |
| TXP / TXN | PCIe Differential Transmit Pair | High-speed output pair for ×1 PCIe link - drives 100 Ω differential load; series AC-coupling capacitors required per PCIe spec. |
| REFCLK+ / REFCLK− | Differential Reference Clock Input | 100 MHz system reference clock pair - used when REFCLK125_SEL = 0; REFCLK− must be AC-coupled to VSS for single-ended mode. |
| CLKOUT[0:6] | PCI Clock Outputs | Six buffered clocks (25/33/50/66 MHz) - CLKOUT6 must connect to CLK input if bridge-generated clocks are used on secondary bus. |
| GPIO0–GPIO4 | General-Purpose I/O | Five 3.3-V LVCMOS multifunction pins - configurable as GPIO, CLKRUN, PWR_OVRD, or I²C SDA/SCL with auto-detection logic. |
Key Features
| Feature | Design Value |
|---|---|
| PCIe-to-PCI Translation | Full ×1 PCIe bandwidth bridging with zero-latency pipeline - maintains native PCI timing across both posted and non-posted transactions. |
| Multi-Master Arbitration | Internal arbiter supporting six external PCI masters with 2-level priority scheme - eliminates need for external arbiter in most embedded applications. |
| Power Management | L0s/L1 link states, CLKREQ/WAKE signaling, and AUX power switching - reduces idle power by >40% vs. legacy PCI bridges in enterprise standby modes. |
| Robust Clocking | Six programmable PCI clock outputs + dual-reference clock support (100 MHz diff / 125 MHz SE) - simplifies board-level clock tree design and eliminates external PLLs. |
| System Integration | JTAG/BS for production test, memory-mapped EEPROM controller for PCIe power budget extensions, and PCI LOCK/FRAME/IRDY/DEVSEL compliance - enables seamless integration into certified PCIe platforms. |
Applications
| Enterprise Server Backplane | Industrial Control Chassis |
|---|---|
|
Use Scenario: Adding legacy PCI-based motion control or I/O modules to a PCIe-based rack-mount server motherboard. IC Role / Device Role / Timing Role: Translation bridge providing protocol, timing, and voltage translation between PCIe root complex and PCI peripheral slots. Use Value: Enables reuse of certified PCI cards in modern server platforms without redesigning firmware or drivers - maintains 66-MHz PCI timing integrity while leveraging PCIe bandwidth. |
Use Scenario: Integrating PCI-based vision capture or fieldbus interface cards into an industrial PLC chassis with PCIe uplink to HMI or cloud gateway. IC Role / Device Role / Timing Role: Bus translator managing coexistence of real-time PCI peripherals and deterministic PCIe backhaul under extended temperature operation. Use Value: Supports 3.3-V/5.0-V mixed-voltage PCI bus operation and L1 power state retention - critical for factory automation systems requiring rapid wake-from-sleep response. |
| Data Center Storage Expansion | Retail Point-of-Sale Terminal |
|
Use Scenario: Attaching legacy PCI RAID or SAS controller cards to a PCIe-based storage server node for cost-optimized capacity scaling. IC Role / Device Role / Timing Role: High-reliability bridge with ECRC, parity error forwarding, and PCIe Advanced Error Reporting - essential for enterprise storage data integrity. Use Value: Provides hardware-level error containment and recovery signaling to host BIOS/firmware - reduces uncorrectable error propagation in multi-tier storage stacks. |
Use Scenario: Enabling PCI-based EMV payment card readers or receipt printers in compact PCIe-based retail terminals with space-constrained PCBs. IC Role / Device Role / Timing Role: Compact ZAJ nFBGA bridge delivering full 32-bit/33-MHz PCI performance in <50 mm² footprint - ideal for fanless, low-power retail enclosures. Use Value: Integrated 3.3-V/5.0-V I/O tolerance and six programmable clock outputs eliminate level shifters and clock buffers - reduces BOM count and layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCI Express to PCI bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PLX Technology PEX8112-AB50BC | ×1 PCIe to PCI-X bridge; supports 133-MHz PCI-X; larger 196-ball PBGA package; no integrated AUX power switch. | Better suited for high-bandwidth PCI-X peripherals (e.g., GigE NICs), but lacks native 5.0-V PCI tolerance and ZAJ footprint compatibility. | Select when PCI-X bandwidth >66 MHz is required and board area allows larger package; verify driver compatibility with PCI-X vs. PCI enumeration. |
| Pericom PI7C9X2G304 | ×2 PCIe to PCI bridge; supports dual independent PCI buses; 128-pin TQFP; no ECRC or L1 ASPM support. | Targeted at dual-slot expansion applications (e.g., dual video capture), but offers lower power efficiency and reduced RAS capability vs. XIO2001IZAJ. | Choose for multi-bus topologies where independent PCI segment isolation is needed; avoid for enterprise RAS-critical deployments due to missing ECRC. |
Compared with PEX8112-AB50BC and PI7C9X2G304, the XIO2001IZAJ uniquely combines ZAJ nFBGA compactness, 5.0-V PCI tolerance, integrated AUX power management, and full PCIe 2.0 RAS features - making it optimal for space-constrained, thermally demanding, and reliability-critical PCI-to-PCIe migration.
Availability
XIO2001IZAJ is available at Aetrix Electronics and suitable for enterprise server backplanes, industrial control chassis, and retail point-of-sale terminals requiring stable component supply and long-term lifecycle support.
Supply support for XIO2001IZAJ 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
Texas Instruments is a global semiconductor leader focused on analog, embedded processing, and connectivity technologies, serving industrial, automotive, and enterprise markets with high-reliability silicon solutions.
The XIO2001IZAJ belongs to TI's PCI Express bridge product line, designed specifically to enable legacy PCI peripheral integration into modern PCIe-based systems - targeting server, storage, and industrial infrastructure where backward compatibility and RAS compliance are mandatory.
FAQ
What is the exact package type and footprint of XIO2001IZAJ?
The XIO2001IZAJ uses a 144-ball ZAJ nFBGA package with 7.0 mm × 7.0 mm body size and 0.5 mm ball pitch. Its pinout matches Figure 5-2 in the TI SCPS212J datasheet, and it is footprint-compatible with other ZAJ-package variants in the XIO2001 family. This package is optimized for high-density PCB layouts in enterprise and industrial applications.
Does XIO2001IZAJ support both 3.3-V and 5.0-V PCI bus signaling?
Yes, XIO2001IZAJ supports 3.3-V and 5.0-V PCI bus I/O signaling. The 5.0-V tolerance applies only at 25 MHz or 33 MHz PCI clock frequencies, while 66-MHz operation requires 3.3-V signaling. This dual-voltage support is implemented via PCIR clamp rail connections and is fully compliant with PCI Local Bus Specification Revision 2.3.
How does XIO2001IZAJ handle PCIe reference clock selection?
XIO2001IZAJ supports two reference clock modes: 100 MHz differential (via REFCLK+/REFCLK−) or 125 MHz single-ended (via REFCLK+ only). The mode is selected using the REFCLK125_SEL pin: logic low enables differential mode, logic high enables single-ended mode. External bias resistors and AC coupling are required per mode per the datasheet layout guidelines.
What power management features are implemented in XIO2001IZAJ?
XIO2001IZAJ implements Active-State Power Management (ASPM) with L0s and L1 states, CLKREQ-driven clock gating, WAKE signal for link reactivation, and integrated AUX power switching that drains VAUX only when main power is off. These features reduce idle power consumption by over 40% compared to legacy PCI bridges in enterprise standby scenarios.
Can XIO2001IZAJ be used with an external PCI arbiter?
Yes, XIO2001IZAJ supports external arbitration via the EXT_ARB_EN pin. When asserted high, the internal arbiter is disabled and GNT0 becomes the bridge's request output, allowing connection to an external PCI arbiter. This configuration is validated in TI's application notes and supports up to six external PCI masters with full timing compliance.
XIO2001IZAJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 144-TFBGA
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- PCI Express to PCI Translation Bridge
- Interface:
- PCI Express
- Voltage - Supply:
- 1.35V ~ 1.65V, 3V ~ 3.6V
- Supplier Device Package:
- 144-NFBGA (7x7)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
XIO2001IZAJ FAQ
1.How can I place an order for XIO2001IZAJ through Aetrix?
Please submit a Request for Quotation (RFQ) for XIO2001IZAJ 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 XIO2001IZAJ reliable?
The price and inventory of XIO2001IZAJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for XIO2001IZAJ is usually 5 days.
3.What payment methods are accepted for XIO2001IZAJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for XIO2001IZAJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for XIO2001IZAJ?
XIO2001IZAJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your XIO2001IZAJ 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 XIO2001IZAJ?
For technical support, including XIO2001IZAJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your XIO2001IZAJ requirements.
6.How does Aetrix verify that XIO2001IZAJ is sourced from the original manufacturer or authorized distributors?
All XIO2001IZAJ 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 XIO2001IZAJ meets industry standards.
7.What is the process for return or replacement of XIO2001IZAJ?
All XIO2001IZAJ units undergo pre-shipment inspection (PSI). If there is an issue with XIO2001IZAJ, 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 XIO2001IZAJ part is unused and in its original packaging.
Return procedure for XIO2001IZAJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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