Texas Instruments PCI2050BPPM

Overview

PCI2050BPPM from Texas Instruments is a PCI-to-PCI bridge IC enabling high-performance interconnection between two 32-bit, 66-MHz PCI buses. It supports concurrent bidirectional burst transfers, write combining, and internal two-tier arbitration for up to nine secondary bus masters. The device operates at 3.3-V core logic with universal 3.3-V/5-V tolerant I/Os and is packaged in a 208-terminal QFP for industrial embedded systems requiring hierarchical bus expansion.

For engineers reviewing the PCI2050BPPM datasheet, PCI2050BPPM pinout, PCI2050BPPM application, or PCI2050BPPM equivalent, key selection criteria include 66-MHz dual-bus timing compliance, CompactPCI hot-swap support, PCI Bus Power Management Interface Specification (Rev 1.1) compatibility, and configurable secondary clock outputs for multi-slot backplane designs.

Technical Context

The PCI2050BPPM implements a transparent bridge architecture compliant with PCI Local Bus Specification Rev 2.2 and PCI-to-PCI Bridge Specification Rev 1.1. It features independent read/write buffers per direction, pipeline-enabled burst transfers, and frame-to-frame latency of only four PCI clocks between primary and secondary buses.

Its arbitration system supports both internal two-tier arbitration (for up to nine secondary masters) and external secondary bus arbitration. Secondary clock generation includes ten configurable outputs with mask control via GPIO, and power management adheres to PCI Bus Power Management Interface Specification Rev 1.1 with defined behavior in D0–D3 states.

Key Specifications

Pinout & Package

PCI2050BPPM is housed in a 208-terminal Quad Flat Package (QFP), designated PPM in Texas Instruments documentation. This RoHS-compliant package measures 28 mm × 28 mm with 0.65-mm lead pitch and exposes all primary and secondary PCI interface signals, JTAG test ports, GPIOs, and dedicated hot-swap control terminals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCI-to-PCI bridge applications.

Compared with PCI2050BPPM, the PDV variant offers identical electrical and functional behavior but demands mechanical redesign, while the GHK BGA version delivers superior density and thermal performance at the cost of solder-reflow process complexity-neither is pin-compatible without layout changes.

Availability

PCI2050BPPM is available at Aetrix Electronics and suitable for industrial backplane expansion, CompactPCI hot-swap systems, and multi-slot embedded servers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for PCI2050BPPM 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 technologies with over 50 years of innovation in industrial and communications infrastructure.

The PCI2050BPPM belongs to TI's Connectivity Solutions portfolio, engineered specifically for PCI bus hierarchy extension in ruggedized, high-availability systems where electrical loading, hot-swap reliability, and deterministic latency are critical design constraints.

FAQ

What is the maximum supported PCI bus frequency for PCI2050BPPM?

The PCI2050BPPM supports operation at up to 66 MHz on both its primary and secondary PCI buses. This is confirmed in Section 1.1 Features and Section 6.4 AC parameters of the SCPS076G data manual. The device maintains full compliance with PCI Local Bus Specification Rev 2.2 at this speed, including setup/hold timing and signal integrity requirements. PCI2050BPPM achieves this using advanced submicron CMOS technology and optimized internal buffering.

Does PCI2050BPPM support both 3.3-V and 5-V PCI signaling environments?

Yes, PCI2050BPPM features universal PCI interfaces with 3.3-V core logic and I/Os tolerant of both 3.3-V and 5-V signaling environments. This is explicitly stated in the "Features" section (page 1−1) and reinforced in the Ordering Information table (page 1−2). The device does not require external level shifters when interfacing with mixed-voltage PCI slots, simplifying system integration in legacy-to-modern upgrade paths.

How many secondary PCI clock outputs does PCI2050BPPM provide, and are they configurable?

PCI2050BPPM provides ten secondary PCI clock outputs (S_CLKOUT0 through S_CLKOUT9), each capable of 33-MHz or 66-MHz operation. These outputs are configurable via the Secondary Clock Control Register and can be individually masked using GPIO inputs, as detailed in Sections 3.15.2 and 5.8 of the SCPS076G manual. This allows dynamic clock gating for power optimization in multi-slot CompactPCI systems.

Is PCI2050BPPM compatible with CompactPCI hot-swap functionality?

Yes, PCI2050BPPM implements full CompactPCI hot-swap functionality per PICMG 1.0 specification. Dedicated pins-including HSLED, HSENUM, and HSSWITCH/GPIO3-enable hardware-controlled insertion/removal sequencing, status indication, and safe power ramping. Section 3.14 and Table 2−14 confirm these signals are present on the PPM package, and the data manual states it is "an ideal solution for multifunction compact PCI cards."

What arbitration capability does PCI2050BPPM offer for secondary bus masters?

PCI2050BPPM provides internal two-tier arbitration supporting up to nine secondary bus masters, as specified in Section 1.1 Features and Section 3.6.2. It also includes an interface for external secondary bus arbitration (Section 3.6.3), allowing system designers to integrate custom or third-party arbiters when more than nine masters are required. This dual-mode flexibility ensures scalability in complex I/O expansion architectures.