Texas Instruments PCI1520IGHK

Overview

The PCI1520IGHK from Texas Instruments is a dual-slot CardBus-to-PCI bridge controller in a 209-ball MicroStar BGA (GHK) package, implementing full 32-bit PCI-to-CardBus bridging at 33 MHz with pipelined architecture, integrated LDO-VR for 2.5-V core supply, and hot-swap support for mixed 3.3-V CardBus and 5-V/3.3-V 16-bit PC Cards in notebook/desktop systems.

For engineers reviewing the PCI1520IGHK datasheet, PCI1520IGHK pinout, PCI1520IGHK application, or PCI1520IGHK equivalent, this page delivers verified technical context on ExCA register compatibility, PCI/ISA interrupt routing options, CardBus socket power management, serial EEPROM configuration interface, and dual-slot timing control - all critical for embedded PC Card subsystem design.

Technical Context

The PCI1520IGHK implements a register-compatible ExCA-compliant bridge with two independent PCI configuration functions (Function 0 and Function 1), each mapping to a separate CardBus socket. It supports both PCI master and slave operation, with burst transfers enabled via pipelined data path logic achieving >130 Mbps throughput in both directions.

Its power architecture integrates a low-dropout voltage regulator (LDO-VR) for internal 2.5-V core supply while maintaining 3.3-V I/O tolerance across PCI, CardBus, and 16-bit PC Card interfaces. The device supports CLKRUN protocol, Suspend mode, ACPI 1.1, and PCI Bus Power Management Interface Specification Rev. 1.1.

Key Specifications

Pinout & Package

Package: 209-ball MicroStar BGA (GHK), 1.0-mm ball pitch, 17 × 17 mm body size, RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PCI1520IGHK, the PCI1420 offers reduced integration and single-slot capability, while the CL-PCID001 lacks ExCA compliance and CardBus support entirely - making PCI1520IGHK the sole option for new dual-socket, ACPI-compliant, mixed-voltage CardBus designs.

Availability

PCI1520IGHK is available at Aetrix Electronics and suitable for notebook expansion modules, industrial docking stations, and medical imaging peripherals requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for PCI1520IGHK 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 solutions for industrial, automotive, and computing markets.

The PCI1520IGHK belongs to TI's PC Card controller product line, engineered specifically for low-power, high-integration CardBus bridge applications in mobile and embedded systems requiring ExCA compliance and dual-socket flexibility.

FAQ

What is the primary function of the PCI1520IGHK in a system architecture?

The PCI1520IGHK serves as a dual-slot CardBus-to-PCI bridge controller, enabling seamless interoperability between PCI host systems and both 16-bit PC Cards and 32-bit CardBus peripherals. It manages address translation, burst data transfers, hot-swap detection, and power sequencing - all while maintaining ExCA register compatibility with legacy OS drivers. Its role is foundational in notebook expansion, docking stations, and industrial peripheral interfaces.

Does the PCI1520IGHK require an external 2.5-V power supply?

No, the PCI1520IGHK 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 (VDD_3V3). This eliminates the need for a separate 2.5-V regulator, reducing component count, PCB area, and power conversion losses - a key advantage in space-constrained mobile designs.

How does the PCI1520IGHK support hot insertion and removal of PC Cards?

The PCI1520IGHK supports hot insertion and removal through internal 3-state bidirectional buffering on all card signals, integrated power-switch control (TPS222X_EN), and ExCA-compliant card-detect logic. It monitors VCC sense lines, asserts proper reset sequences upon card insertion, and coordinates power ramping via its power-control registers - all without requiring external buffer ICs or discrete sequencing circuitry.

Is the PCI1520IGHK compatible with standard PC Card drivers?

Yes, the PCI1520IGHK is fully ExCA-compatible and register-mapped identically to the Intel 82365SL-DF and 82365SL controllers. This ensures binary compatibility with existing PCMCIA driver stacks in Windows, Linux, and real-time OS environments. Its dual-function PCI configuration space (Function 0 and Function 1) allows standard OS drivers to manage each socket independently without modification.

What power management features does the PCI1520IGHK implement?

The PCI1520IGHK implements comprehensive power management including Suspend mode (per PCI PM Spec Rev. 1.1), CLKRUN protocol support, ACPI 1.1 compliance, CardBus CCLKRUN control, and internal ring oscillator for wake-up timing. It also supports PCI Bus Lock, PME signaling, and programmable general-purpose I/Os for custom power sequencing - enabling deep-sleep states with sub-mW quiescent current in mobile systems.