Texas Instruments PCI1520PDV

Overview

PCI1520PDV from Texas Instruments is a 208-pin LQFP dual-slot PCI-to-CardBus bridge controller supporting hot-plug 16-bit PC Cards and 32-bit CardBus cards at 33 MHz, with integrated 2.5-V LDO-VR, ExCA register compatibility, and pipelined architecture enabling >130 Mbps sustained throughput in notebook and desktop host systems.

For engineers reviewing the PCI1520PDV datasheet, PCI1520PDV pinout, PCI1520PDV application, or PCI1520PDV equivalent, this page delivers verified electrical specs, socket-level power management features, PCI/ISA interrupt routing options, and confirmed register compatibility with Intel 82365SL-DF for legacy driver reuse and system integration validation.

Technical Context

The PCI1520PDV implements a dual-function PCI device with separate configuration spaces for two independent CardBus sockets, supporting both master and slave PCI roles. Its internal data path handles 8-/16-/32-bit card accesses via full 32-bit PCI cycles, while integrated buffering enables hot insertion/removal without external logic.

It complies with PCI Local Bus Specification Rev. 2.2 and PCI Bus Power Management Interface Spec Rev. 1.1, featuring CLKRUN/SUSPEND signaling, ACPI 1.1 support, and programmable SMI generation. The serial EEPROM interface loads subsystem IDs, and the TPS222X-compatible power-switch interface controls slot VCC/VPP sequencing per PC Card Standard Rev. 7.1.

Key Specifications

Pinout & Package

PCI1520PDV uses a 208-pin Low-Profile Quad Flat Package (LQFP) with 0.5-mm pitch, thermally enhanced for notebook thermal constraints. Pin assignments are defined in Figure 2−2 and Table 2−1 of SCPS065D.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Intel 82365SL-DF, PCI1520PDV reduces system power and component count via integrated LDO-VR; compared with PCI1520GHK, it offers easier manufacturability and thermal management in cost-sensitive notebook add-in cards.

Availability

PCI1520PDV is available at Aetrix Electronics and suitable for mobile computing, industrial embedded, and communications gateway applications requiring stable component supply and long-term lifecycle support.

Supply support for PCI1520PDV 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 specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and computing markets.

The PCI1520 product line was designed specifically to enable PCI-based host systems to support PC Card Standard Rev. 7.1 compliant peripherals with minimal firmware changes and zero external power regulation.

FAQ

What is the primary function of the PCI1520PDV in a host system?

The PCI1520PDV serves as a dual-slot PCI-to-CardBus bridge controller, enabling host systems to interface with both 16-bit PC Cards and 32-bit CardBus peripherals. It manages voltage translation, hot-plug sequencing, ExCA register mapping, and high-throughput data transfers while maintaining full compatibility with Intel 82365SL-DF drivers. Its integrated LDO-VR and pipelined architecture make PCI1520PDV ideal for power- and space-constrained notebook platforms.

Does the PCI1520PDV require an external 2.5-V power supply?

No, the PCI1520PDV does not require an external 2.5-V supply. It integrates a low-dropout voltage regulator (LDO-VR) that generates the 2.5-V core voltage from the 3.3-V I/O rail. This eliminates the need for a separate regulator IC and associated passive components, reducing BOM cost and PCB area. The LDO-VR is specified to operate across the full commercial temperature range and supports all PCI1520PDV core logic functions without derating.

How does the PCI1520PDV support hot insertion and removal of PC Cards?

The PCI1520PDV supports hot insertion and removal through fully buffered card signals, eliminating the need for external bus switches or level translators. Internal clamping diodes and controlled power-up sequencing-coordinated with the TPS222X power switch via dedicated control pins-ensure safe voltage ramping and signal isolation during card events. GRST deassertion triggers EEPROM-based subsystem ID loading and socket state initialization, enabling reliable enumeration after hot-plug without host reset.

Is the PCI1520PDV compatible with existing 82365SL-DF software drivers?

Yes, the PCI1520PDV is register-compatible with the Intel 82365SL-DF and 82365SL ExCA controllers. Its PCI configuration space, ExCA register offsets, and CardBus socket register maps match those of the Intel parts exactly. This allows direct reuse of existing BIOS initialization code and OS driver stacks-including Windows 98/2000 PnP and Linux Yenta modules-without modification. No firmware or driver updates are required for migration to PCI1520PDV.

What power management features does the PCI1520PDV implement?

The PCI1520PDV implements comprehensive power management including PCI PME signaling, Suspend Mode (S3/S4), CLKRUN protocol support, ACPI 1.1 compliance, and programmable SUSPEND# output. It supports dynamic clock gating, low-power idle states, and coordinated wake-event handling via General-Purpose Event registers. These features allow the host OS to manage power states transparently while maintaining full CardBus functionality upon resume-critical for battery-powered applications using PCI1520PDV.