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Texas Instruments PCI2050BZHK
- Part No.:
- PCI2050BZHK
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 257-LFBGA
- Datasheet:
-
PCI2050BZHK.pdf
- Description:
- IC INTERFACE SPECIALIZED 257BGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,158
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Product details
Overview
PCI2050BZHK from Texas Instruments is a PCI-to-PCI bridge IC enabling hierarchical expansion of 32-bit, 66-MHz PCI buses with dual independent 3.3-V/5-V tolerant interfaces, internal two-tier arbitration for up to nine secondary bus masters, and CompactPCI hot-swap support - deployed in industrial control backplanes and multifunction CPCI cards.
For engineers reviewing the PCI2050BZHK datasheet, PCI2050BZHK pinout, PCI2050BZHK application, or PCI2050BZHK equivalent, key selection criteria include 257-pin RoHS-compliant MicroStar BGA package compatibility, 66-MHz timing compliance per PCI Local Bus Spec Rev 2.2, write combining capability, and secondary clock output count (10) for multi-slot timing distribution.
Technical Context
The PCI2050BZHK implements a transparent bridge architecture compliant with PCI-to-PCI Bridge Specification Rev 1.1, supporting Type 0 and Type 1 configuration cycles, burst-mode transfers with pipeline buffering, and frame-to-frame latency of only four PCI clocks between primary and secondary buses.
It features dedicated hardware for PCI power management (PMCSR support), JTAG boundary-scan (IEEE 1149.1), and configurable GPIOs for hot-swap signaling (HSENUM, HSLED, HSSWITCH), with secondary bus reset assertion and VGA/I/O decoding options enabled via configuration registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bus Interface | Dual 32-bit PCI buses, both supporting 33-MHz and 66-MHz operation with M66ENA control |
| Core Voltage | 3.3-V core logic with universal I/Os tolerant of 3.3-V and 5-V PCI signaling environments |
| Arbitration | Internal two-tier arbitration supporting up to nine secondary bus masters; external arbiter interface available |
| Clock Outputs | Ten secondary PCI clock outputs (S_CLKOUT0–S_CLKOUT9) for slot-level timing distribution |
| Power Management | Compliant with PCI Bus Power Management Interface Spec Rev 1.1; supports D0–D3hot states via PMCSR |
| Hot-Swap Support | Full CompactPCI hot-swap functionality per PICMG Spec Rev 1.0, including HSLED, HSENUM, and HSSWITCH signals |
| Package | 257-terminal RoHS-compliant MicroStar BGA™ (ZHK), mechanically identical to GHK but lead-free |
Pinout & Package
The PCI2050BZHK is housed in a 257-terminal RoHS-compliant MicroStar BGA™ package (ZHK), with 1.0-mm ball pitch and 17 × 17 array layout. Pinout matches the GHK variant per TI documentation; Figure 2−1 applies to both ZHK and GHK packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P_AD[31:0] | Primary Address/Data Bus | Time-multiplexed 32-bit address/data lines for primary PCI bus communication |
| S_AD[31:0] | Secondary Address/Data Bus | Time-multiplexed 32-bit address/data lines for secondary PCI bus communication |
| P_CLK / S_CLK | Primary/Secondary Clock Inputs | Independent 33/66-MHz reference clocks driving respective PCI bus timing domains |
| S_CLKOUT[0:9] | Secondary Clock Outputs | 10 buffered, phase-aligned clock outputs for driving downstream PCI slots or peripherals |
| P_RST / S_RST | Primary/Secondary Reset Inputs | Asynchronous reset signals; secondary bus driven low during reset per spec requirement |
| HSENUM / HSLED / HSSWITCH | Hot-Swap Control Signals | Enable enumeration, indicate hot-swap status, and detect switch actuation per PICMG CompactPCI |
Key Features
| Feature | Design Value |
|---|---|
| Write Combining | Aggregates multiple small writes into burst transfers, reducing bus occupancy and improving throughput for memory-mapped I/O |
| Burst Pipeline Architecture | Enables concurrent read/write operations across both buses with independent buffers, maximizing bidirectional bandwidth |
| Delayed Transaction Support | Handles up to three delayed transactions per direction, accommodating target latency without stalling the bridge |
| Configurable Decoding | VGA palette memory and I/O address space decoding options simplify integration in legacy graphics or peripheral subsystems |
| JTAG Boundary Scan | Full IEEE 1149.1 test access port (TCK, TMS, TDI, TDO, TRST) enables board-level manufacturing test and debug |
Applications
| Industrial Backplane Expansion | CompactPCI Hot-Swap Card |
|---|---|
Use Scenario: Expanding a single PCI host slot into multiple downstream slots in an industrial automation chassis with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Transparent PCI-to-PCI bridge providing electrical isolation, bus segmentation, and clock fanout to nine secondary devices. Use Value: Enables hierarchical bus topology while staying within PCI electrical loading limits (≤10 loads/bus), eliminating signal integrity degradation across long backplane traces. | Use Scenario: Building a multifunction CompactPCI card that supports field-replaceable modules without powering down the system. IC Role / Device Role / Timing Role: Hot-swap controller and bridge, managing insertion/removal sequencing and distributing synchronized clocks to all slots. Use Value: Provides native HSENUM/HSLED signaling and 10 secondary clock outputs, eliminating need for discrete hot-swap ASICs or clock buffers. |
| Legacy System Upgrade | PCI Bus Isolation |
Use Scenario: Integrating modern 66-MHz PCI peripherals into an existing 33-MHz host system without redesigning the motherboard. IC Role / Device Role / Timing Role: Frequency-transparent bridge translating timing and protocol between mismatched bus speeds. Use Value: Supports independent 33/66-MHz operation on each side via P_M66ENA/S_M66ENA controls, preserving legacy timing while enabling high-speed peripherals. | Use Scenario: Isolating noise-sensitive measurement circuitry from high-traffic data acquisition bus segments in test equipment. IC Role / Device Role / Timing Role: Protocol-conforming bridge enforcing transaction boundaries and preventing bus lock propagation. Use Value: Implements bus locking propagation control and predictable latency per PCI Local Bus Spec, ensuring deterministic response times for time-critical subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCI-to-PCI bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCI2050BGHK | Identical electrical and functional specification; non-RoHS 257-pin MicroStar BGA package | Same use cases, but not suitable for RoHS-compliant production or EU markets | Select PCI2050BZHK when lead-free compliance is required; otherwise, GHK offers identical performance at potentially lower cost. |
| PCI2040BPDV | Single 208-pin QFP package; supports only one 66-MHz PCI bus (primary); secondary bus limited to 33 MHz | Lower-cost, space-constrained designs where full 66-MHz secondary operation is unnecessary | Choose PCI2040BPDV only if secondary bus speed ≤33 MHz suffices and QFP assembly is preferred over BGA. |
Compared with PCI2050BGHK, the PCI2050BZHK adds RoHS compliance without performance trade-offs; versus PCI2040BPDV, it delivers full dual-66-MHz capability and 10-clock fanout - critical for high-bandwidth, multi-slot CompactPCI systems requiring deterministic timing and regulatory alignment.
Availability
PCI2050BZHK is available at Aetrix Electronics and suitable for industrial backplane expansion, CompactPCI hot-swap card development, and legacy PCI system upgrades requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for PCI2050BZHK 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 company specializing in analog, embedded processing, and connectivity solutions, with decades of leadership in PCI infrastructure components.
The PCI2050BZHK belongs to TI's Connectivity Solutions portfolio, designed specifically for PCI bus expansion, hierarchical system partitioning, and ruggedized industrial computing platforms requiring hot-swap reliability and power efficiency.
FAQ
What is the primary function of the PCI2050BZHK in a PCI-based system?
The PCI2050BZHK serves as a transparent PCI-to-PCI bridge that electrically and logically isolates two 32-bit PCI buses while enabling concurrent burst-mode transactions between them. It allows system designers to exceed the PCI specification's 10-device electrical loading limit by creating hierarchical bus structures - essential for industrial backplanes and CompactPCI systems. The PCI2050BZHK maintains full PCI Local Bus Spec Rev 2.2 and PCI-to-PCI Bridge Spec Rev 1.1 compliance.
Does the PCI2050BZHK support both 33-MHz and 66-MHz operation on both buses simultaneously?
Yes, the PCI2050BZHK supports independent 33-MHz or 66-MHz operation on both primary and secondary buses. Each bus uses its own M66ENA control signal (P_M66ENA and S_M66ENA) to configure timing mode. This flexibility allows integration into mixed-speed systems - for example, connecting a legacy 33-MHz host to modern 66-MHz peripherals - without protocol translation or performance bottlenecks.
How does the PCI2050BZHK implement CompactPCI hot-swap functionality?
The PCI2050BZHK integrates native CompactPCI hot-swap support per PICMG Spec Rev 1.0, featuring dedicated pins (HSENUM, HSLED, HSSWITCH/GPIO3) and internal logic to manage insertion/removal sequencing, status reporting, and fault detection. It drives the secondary bus low during reset and provides precise timing control for hot-swap controllers - eliminating the need for external hot-swap ASICs in multifunction CPCI cards built around the PCI2050BZHK.
What package type and RoHS status does the PCI2050BZHK use?
The PCI2050BZHK is supplied in a 257-terminal RoHS-compliant MicroStar BGA™ package (ZHK variant), with 1.0-mm ball pitch and 17 × 17 array. It is mechanically and electrically identical to the non-RoHS PCI2050BGHK, differing only in lead-free solder composition and associated process controls - making it suitable for environmentally regulated markets without design or layout changes.
Can the PCI2050BZHK be used in temperature ranges beyond commercial grade (0°C to 70°C)?
No - the PCI2050BZHK is specified only for 0°C to 70°C operation. For extended temperature applications (−40°C to 85°C), Texas Instruments offers the pin-compatible PCI2050BIZHK variant, which shares the same RoHS-compliant 257-ball MicroStar BGA package but is qualified across the industrial temperature range. Designers requiring wider thermal margins must select PCI2050BIZHK instead of PCI2050BZHK.
PCI2050BZHK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 257-LFBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Applications:
- PCI-to-PCI Bridge
- Interface:
- PCI
- Voltage - Supply:
- 3V ~ 3.6V
- Supplier Device Package:
- 257-BGA MICROSTAR (16x16)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
PCI2050BZHK FAQ
1.How can I place an order for PCI2050BZHK through Aetrix?
Please submit a Request for Quotation (RFQ) for PCI2050BZHK 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 PCI2050BZHK reliable?
The price and inventory of PCI2050BZHK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCI2050BZHK is usually 5 days.
3.What payment methods are accepted for PCI2050BZHK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCI2050BZHK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCI2050BZHK?
PCI2050BZHK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCI2050BZHK 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 PCI2050BZHK?
For technical support, including PCI2050BZHK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCI2050BZHK requirements.
6.How does Aetrix verify that PCI2050BZHK is sourced from the original manufacturer or authorized distributors?
All PCI2050BZHK 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 PCI2050BZHK meets industry standards.
7.What is the process for return or replacement of PCI2050BZHK?
All PCI2050BZHK units undergo pre-shipment inspection (PSI). If there is an issue with PCI2050BZHK, 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 PCI2050BZHK part is unused and in its original packaging.
Return procedure for PCI2050BZHK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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