Texas Instruments PCI1420ZHK

Overview

PCI1420ZHK from Texas Instruments is a PCI-to-CardBus bridge controller supporting two independent PC Card/CardBus sockets, compliant with the 1997 PC Card Standard and PCI Local Bus Specification Rev 2.2. It delivers >130 Mbps throughput via pipelined architecture, supports mix-and-match 5-V/3.3-V 16-bit PC Cards and 3.3-V CardBus cards, and features five PCI memory windows and two I/O windows per R2 socket.

For engineers reviewing the PCI1420ZHK datasheet, PCI1420ZHK pinout, PCI1420ZHK application, or PCI1420ZHK equivalent, key selection considerations include its 209-terminal MicroStar BGA™ package (ZHK), ExCA register compatibility with Intel 82365SL, distributed DMA support, hot-insertion capability, and dual-slot power management via TPS2206/2216 interface.

Technical Context

The PCI1420ZHK implements a fully pipelined data path enabling sustained burst transfers between PCI and CardBus domains, with separate configuration space for each socket and support for both PCI master and slave operation. It integrates Exchangeable Card Architecture (ExCA) registers mapped in memory and I/O space, and provides parallel/serial ISA and PCI interrupt signaling paths.

Its internal buffering eliminates need for external hot-swap protection circuitry, while advanced submicron CMOS technology enables operation at 33 MHz with multiple low-power modes. The device uses a serial EEPROM interface to load subsystem ID/vendor ID and includes dedicated pins for socket activity LEDs, CLKRUN, CCLKRUN, and PCI Bus Lock (LOCK).

Key Specifications

Pinout & Package

The PCI1420ZHK is housed in a 209-terminal MicroStar BGA™ package (ZHK), RoHS-compliant with SnAgCu finish and JEDEC MSL Level-3 (260°C, 168 hr).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PCI1420GHK and PCI1420PDV, the PCI1420ZHK offers RoHS-compliant SnAgCu interconnects and JEDEC Level-3-260°C moisture sensitivity - critical for high-reliability, volume-manufactured notebook platforms where long-term solder joint integrity and environmental compliance are mandatory.

Availability

PCI1420ZHK is available at Aetrix Electronics and suitable for notebook computer expansion, desktop docking stations, industrial data acquisition hubs, and medical imaging peripheral interfaces requiring stable component supply and long-term lifecycle support.

Supply support for PCI1420ZHK 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 designing analog, embedded processing, and wireless chips for industrial, automotive, and computing applications.

The PCI1420ZHK belongs to TI's PC Card Controllers product line, engineered specifically for high-throughput, low-latency bridging between PCI host systems and dual-slot PC Card/CardBus peripherals in space-constrained mobile platforms.

FAQ

What is the primary function of the PCI1420ZHK?

The PCI1420ZHK is a PCI-to-CardBus bridge controller that enables communication between a PCI host bus and two independent PC Card or CardBus sockets. It handles protocol translation, voltage level adaptation, hot insertion/removal control, and DMA coordination. Its pipelined architecture sustains >130 Mbps throughput, and it supports mixed 5-V/3.3-V 16-bit cards and 3.3-V CardBus cards. The PCI1420ZHK is used in notebook computers, docking stations, and industrial controllers where legacy and modern PC Card peripherals coexist.

Does the PCI1420ZHK support hot insertion and removal of PC Cards?

Yes, the PCI1420ZHK supports hot insertion and removal of both 16-bit PC Cards and 32-bit CardBus cards. All card signals are internally buffered to eliminate the need for external hot-swap protection circuitry. This capability is implemented per the 1997 PC Card Standard and verified through TI's design validation. The PCI1420ZHK also provides dedicated control signals such as CCLKRUN# and socket activity LED outputs to coordinate safe insertion/removal sequences in systems using the PCI1420ZHK.

What package type and mounting technology does the PCI1420ZHK use?

The PCI1420ZHK uses a 209-terminal MicroStar BGA™ package designated ZHK, with SnAgCu (lead-free) ball finish and JEDEC MSL Level-3 rating (260°C peak, 168-hour floor life). It is RoHS-compliant and designed for surface-mount reflow assembly. Unlike the PDV LQFP variant, the ZHK package requires BGA-specific PCB layout, stencil design, and reflow profiling. The PCI1420ZHK's ZHK package is not mechanically or electrically interchangeable with GHK (SnPb) or PDV (LQFP) variants.

Is the PCI1420ZHK compatible with Intel 82365SL register sets?

Yes, the PCI1420ZHK is register-compatible with the Intel 82365SL-DF and 82365SL ExCA controllers. Its Exchangeable Card Architecture (ExCA) registers are mapped identically in memory and I/O space, enabling reuse of existing BIOS initialization code and OS drivers without modification. This compatibility extends to socket configuration, interrupt routing, and power management registers. The PCI1420ZHK maintains this alignment while adding enhancements including pipelined throughput, distributed DMA, and expanded window allocation - all accessible through the same ExCA register interface used by the PCI1420ZHK.

What power management features does the PCI1420ZHK support?

The PCI1420ZHK complies with the PCI Bus Power Management Interface Specification and supports CLKRUN#, CCLKRUN#, and PCI Bus Lock (LOCK#) signals. It implements multiple low-power modes coordinated with host system power states, including clock gating and selective functional shutdown. The device uses an internal ring oscillator for autonomous timing during low-power states and supports fast wake-up from suspend. These capabilities are integral to the PCI1420ZHK's design for battery-powered notebooks and thermally constrained docking solutions.