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Texas Instruments PCI7420GHK
- Part No.:
- PCI7420GHK
- Manufacturer:
- Texas Instruments
- Category:
- Controllers
- Package:
- 288-LFBGA
- Datasheet:
-
PCI7420GHK.pdf
- Description:
- IC CONTROLLER PCI CARD 288LFBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
PCI7420GHK from Texas Instruments is a quad-function PCI-to-CardBus/Smart Card/IEEE 1394a/SD/MMC/MS-Pro controller IC. It integrates two independent PC Card sockets, a dual-port IEEE 1394a-2000 OHCI PHY/Link-layer controller (S100/S200/S400), SD/MMC and Memory Stick Pro socket logic, and supports 33-MHz PCI bus operation with 132-MBps burst transfers. It serves as a high-integration bridge in mobile docking stations and legacy PC Card expansion solutions.
For engineers reviewing the PCI7420GHK datasheet, PCI7420GHK pinout, PCI7420GHK application, or PCI7420GHK equivalent, key selection considerations include its four-function PCI configuration (Functions 0–3), 288-pin BGA MICROSTAR-GHK package, 1.8-V core / 3.3-V I/O voltage domains, IEEE 1394a arbitration enhancements, and Smart Card interface compatibility per PC Card Standard 8.0.
Technical Context
The PCI7420GHK implements four distinct PCI functions: Functions 0 and 1 are register-compatible ExCA controllers for dual PC Card/Smart Card sockets supporting hot insertion, 5-V/3.3-V card power, and Intel 82365SL–DF register mapping; Function 2 integrates a full IEEE 1394a-2000 OHCI-compliant PHY/LLC with two independent cable ports, TPBIAS biasing per port, and physical write posting buffers.
Function 3 provides dedicated SD/MMC and Memory Stick Pro socket control with concurrent signal routing, while the device uses an internal PLL driven by a 24.576-MHz crystal to generate 393.216-MHz and 49.152-MHz clocks for 1394 encoding/decoding and LLC synchronization - enabling S100/S200/S400 data rates without external clock synthesis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PCI Interface | 33-MHz, 32-bit PCI Local Bus Revision 2.3 compliant; supports D0–D3 power states and ACPI 2.0. |
| 1394 Data Rates | S100/S200/S400 (100/200/400 Mbits/s); fully IEEE 1394a-2000 compliant with fly-by concatenation and port disable. |
| Core/I/O Voltage | 1.8-V core logic with internal regulator; 3.3-V I/O cells compatible with both 3.3-V and 5-V PCI signaling environments. |
| Card Support | Dual independent sockets: 16-bit PC Card, CardBus, Smart Card adapter; supports 5-V and 3.3-V card power per socket. |
| Memory Card Interfaces | Dedicated SD/MMC and Memory Stick/MS-Pro controller (Function 3); enables concurrent use of both card types. |
| Package | 288-pin BGA MICROSTAR-GHK; 17 mm × 17 mm footprint; RoHS-compliant (Pb-Free, MSL level not specified). |
| Power Management | Ultralow-power sleep mode; automatic device power-down during suspend; inactive 1394 ports powered down. |
Pinout & Package
PCI7420GHK is housed in a 288-pin MICROSTAR BGA package (GHK drawing) with 17 mm × 17 mm body size and 1.0-mm ball pitch. Pinout reflects four-function PCI enumeration: Function 0 (PC Card Socket 0), Function 1 (PC Card Socket 1), Function 2 (1394 PHY/LLC), and Function 3 (SD/MMC/MS-Pro). Ball assignments follow TI's GHK mechanical layout with dedicated VCCIO/VCCCORE banks, PCI address/data/control groups, CardBus attribute/memory I/O spaces, 1394 TPBIAS/TPA/TPB differential pairs per port, and SD/MS command/data lanes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PCI_AD[31:0] | PCI Address/Data Multiplexed Bus | 32-bit bidirectional multiplexed address/data lines shared across all four PCI functions. |
| PCI_CBE[3:0]# | PCI Command/Byte Enable | Defines transaction type (I/O read/write, memory read/write) and active byte lanes during data phase. |
| PCI_FRAME# | PCI Cycle Frame Indicator | Signals start/end of PCI transaction; asserted by initiator to indicate valid address phase. |
| PCI_IRDY# / PCI_TRDY# | PCI Initiator/Target Ready | Controls data transfer timing: IRDY# indicates initiator ready; TRDY# indicates target ready. |
| 1394_TPA0+/−, TPB0+/− | Differential 1394 Port 0 Signaling | Twisted-pair A carries strobe; twisted-pair B carries data; each port has independent TPBIAS bias terminal. |
| SD_CMD, SD_CLK, SD_DAT[3:0] | Secure Digital Interface | Full 4-bit SD bus support including command, clock, and bidirectional data lanes for SD/MMC cards. |
| MS_CMD, MS_CLK, MS_DAT | Memory Stick Interface | Single-line serial interface for Memory Stick and Memory Stick Pro cards; separate from SD signal routing. |
Key Features
| Feature | Design Value |
|---|---|
| Four-Function PCI Device | Enables single-chip integration of CardBus host bridge, Smart Card controller, 1394 OHCI, and flash media socket - eliminating discrete bridge + controller combinations. |
| IEEE 1394a Arbitration Enhancements | Supports multispeed concatenation, short reset, and port disable/suspend/resume - enabling robust topology management in portable FireWire peripherals. |
| Concurrent SD/MMC + MS/MS-Pro Support | Dedicated signal routing allows simultaneous insertion and operation of SD and Memory Stick cards without multiplexing or software arbitration overhead. |
| ExCA Register Compatibility | Direct replacement for Intel 82365SL–DF in existing PC Card driver stacks - no OS or BIOS modification required for migration. |
| Deep FIFO + Physical Write Posting | Buffers up to three outstanding physical writes and employs deep FIFOs to absorb PCI latency spikes - sustaining 132-MBps throughput under host load. |
Applications
| Mobile Docking Station | Legacy PC Card Expansion Card |
|---|---|
|
Use Scenario: A compact docking solution for ultraportable laptops adds CardBus, Smart Card, FireWire, and SD/MS connectivity via a single PCIe-to-PCI bridge and PCI7420GHK. IC Role / Device Role / Timing Role: PCI7420GHK acts as the primary PCI peripheral hub - managing socket arbitration, 1394 link-layer state, and flash media protocol translation. Use Value: Reduces BOM count by consolidating four controller functions into one die; eliminates need for external 1394 PHY or SD host controller ICs. |
Use Scenario: An add-in card for desktop PCs restores legacy PC Card slot functionality while adding modern FireWire and SD card readers. IC Role / Device Role / Timing Role: PCI7420GHK serves as the PCI endpoint that presents four enumerated functions to the host OS - enabling native driver support for each interface. Use Value: Enables Windows Plug-and-Play recognition of CardBus, 1394, and SD devices without custom HAL extensions or firmware overlays. |
| Industrial Thin Client Terminal | Medical Data Acquisition Module |
|
Use Scenario: A fanless thin client uses PCI7420GHK to support smart card-based authentication, field-upgradable firmware via SD card, and FireWire-connected imaging peripherals. IC Role / Device Role / Timing Role: PCI7420GHK handles secure credential validation (Smart Card), local storage access (SD), and real-time video streaming (1394 isochronous channels). Use Value: Single-chip integration ensures deterministic timing for isochronous 1394 transfers and avoids inter-IC skew between discrete controllers. |
Use Scenario: A portable ECG/ultrasound module uses PCI7420GHK to log patient data to SD cards, authenticate clinicians via Smart Card, and stream waveform data over FireWire to host workstations. IC Role / Device Role / Timing Role: PCI7420GHK operates as the system I/O concentrator - coordinating time-critical 1394 isochronous receive buffers and non-volatile SD write operations. Use Value: Built-in 1394 physical write posting and deep FIFOs prevent data loss during transient PCI bus congestion during high-resolution waveform capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-interface PCI controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PCI7421ZHK | Direct successor; replaces PCI7420GHK per TI documentation; identical function set, same 288-pin ZHK BGA package (pin-compatible), enhanced thermal performance. | Same application scope but qualified for newer industrial temperature range; supports updated 1394a errata fixes not present in PCI7420GHK. | Select PCI7421ZHK for new designs requiring long-term supply continuity and documented lifecycle support. |
| PCI7620GHK | Includes Smart Card controller (Function 1 extended); otherwise identical architecture, pinout, and timing to PCI7420GHK. | Required only when Smart Card reader functionality is mandatory; PCI7420GHK omits Smart Card logic to reduce gate count and cost. | Choose PCI7420GHK where Smart Card support is unnecessary - reduces silicon area and power consumption versus PCI7620GHK. |
Compared with PCI7421ZHK, PCI7420GHK lacks updated thermal specs and 1394a errata handling; compared with PCI7620GHK, it excludes Smart Card controller logic - making it optimal for cost-sensitive, non-Smart Card PC Card + FireWire + SD expansion designs.
Availability
PCI7420GHK is available at Aetrix Electronics and suitable for mobile docking stations, legacy PC Card expansion cards, industrial thin clients, medical data acquisition modules, and embedded FireWire/SD interface subsystems requiring stable component supply despite its obsolete status.
Supply support for PCI7420GHK 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 founded in 1930, specializing in analog, embedded processing, and connectivity technologies with broad industrial, automotive, and computing design expertise.
The PCI7420GHK belongs to TI's PCI-to-peripheral bridge product line, designed specifically to consolidate legacy PC Card, IEEE 1394, and flash memory interfaces into single-chip solutions for space-constrained mobile and docking platforms.
FAQ
What is the functional difference between PCI7420GHK and PCI7620GHK?
The PCI7420GHK and PCI7620GHK share identical PCI-to-CardBus, IEEE 1394a, and SD/MMC/MS-Pro controller functionality. The key distinction is that PCI7620GHK includes a full Smart Card controller in Function 1, whereas PCI7420GHK omits this logic. Both use the same 288-pin MICROSTAR-GHK BGA package and are register-compatible for Functions 0, 2, and 3. PCI7420GHK is optimized for lower cost and power when Smart Card support is unnecessary.
Is PCI7420GHK pin-compatible with any newer TI replacement?
Yes, PCI7420GHK is pin-compatible with PCI7421ZHK, which TI explicitly lists as its replacement. Both devices use 288-ball BGA packages (GHK vs. ZHK) with identical ball pitch and mechanical footprint. Electrical pin assignments, PCI configuration space layout, and function enumeration match precisely - enabling drop-in PCB replacement where thermal and reliability requirements permit.
Does PCI7420GHK support hot insertion and removal of PC Cards?
Yes, PCI7420GHK fully supports hot insertion and removal of PC Cards. Its internal buffering isolates card signals from the host bus, and it implements the PC Card Standard 8.0 hot-swap protocol. The device monitors card presence, manages power sequencing, and asserts appropriate ExCA interrupts - all without requiring external hot-swap controllers or level shifters.
What clock sources does PCI7420GHK require for IEEE 1394 operation?
PCI7420GHK requires a single 24.576-MHz crystal connected to its XIN/XOUT pins to drive the internal PLL. This PLL generates the 393.216-MHz reference for 1394 encoding and the 49.152-MHz clock for LLC synchronization. No additional clocks are needed for 1394 operation - the device synthesizes all required timing internally from this one crystal source.
Can PCI7420GHK simultaneously operate SD and Memory Stick cards?
Yes, PCI7420GHK supports concurrent operation of SD/MMC and Memory Stick/MS-Pro cards. Function 3 provides physically separate signal paths - SD_CMD/CLK/DAT[3:0] and MS_CMD/CLK/DAT - allowing both card types to be inserted and accessed independently without multiplexing or software arbitration. This enables dual-slot flash media readers in compact form factors.
PCI7420GHK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 288-LFBGA
- Programmable:
- Not Verified
- Protocol:
- PCI CardBus
- Function:
- Controller
- Interface:
- PCI
- Standards:
- IEEE 1394a-2000, OHCI
- Voltage - Supply:
- 3.3V, 5V
- Current - Supply:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- 288-BGA Microstar (16x16)
- Grade:
- -
- Qualification:
- -
PCI7420GHK FAQ
1.How can I place an order for PCI7420GHK through Aetrix?
Please submit a Request for Quotation (RFQ) for PCI7420GHK 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 PCI7420GHK reliable?
The price and inventory of PCI7420GHK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PCI7420GHK is usually 5 days.
3.What payment methods are accepted for PCI7420GHK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PCI7420GHK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PCI7420GHK?
PCI7420GHK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PCI7420GHK 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 PCI7420GHK?
For technical support, including PCI7420GHK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PCI7420GHK requirements.
6.How does Aetrix verify that PCI7420GHK is sourced from the original manufacturer or authorized distributors?
All PCI7420GHK 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 PCI7420GHK meets industry standards.
7.What is the process for return or replacement of PCI7420GHK?
All PCI7420GHK units undergo pre-shipment inspection (PSI). If there is an issue with PCI7420GHK, 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 PCI7420GHK part is unused and in its original packaging.
Return procedure for PCI7420GHK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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