on February 18th 280

XC3042-100PC84C PLCC84 Package, Logic Blocks, and Performance

The XC3042-100PC84C is a classic programmable logic device from the well-known XC3000 family. It gives you a flexible way to handle digital logic without relying on fixed-function chips. With around 3000 usable gates and 5V operation, it fits perfectly into older boards and long-running systems. You can reprogram it by loading configuration data at power-up, which makes updates much easier. Its 84-pin PLCC package keeps board layouts compact while still offering plenty of I/O connections. From industrial machines to retro computing projects, this device continues to support reliable hardware designs. Here, you’ll get a clear look at its features, structure, and real-world uses.

Catalog

XC3042-100PC84C Overview

The XC3042-100PC84C is a CMOS SRAM based field programmable gate array designed for configurable digital logic implementation. It belongs to the XC3000 family and is supplied in an 84 pin PLCC package. The device operates with a 5 volt supply and requires configuration data at power up to define its logic functions. Its internal structure supports programmable logic blocks and flexible input and output connections for control, interface, and data handling tasks. This component is commonly used in embedded systems, industrial equipment, and legacy digital platforms that require adaptable hardware logic. Looking for XC3042-100PC84C Contact us to check current stock, lead time, and pricing.

Typical Icc vs. Frequency for XC3042-100PC84C

Graph plots typical supply current on the vertical axis in milliamps against clock frequency on the horizontal axis in megahertz, showing current increasing with operating frequency. Two operating modes are identified, labeled Low Power and High Performance, each represented by a rising line. Low Power mode reaches approximately 104 MHz at a current near 120 mA, while High Performance mode extends to about 178 MHz with current approaching 240 mA. The linear trend in both curves indicates proportional growth of dynamic current consumption as switching frequency increases, reflecting frequency dependent power characteristics of the device.

XC3042-100PC84C CAD Model

XC3042-100PC84C Symbol

XC3042-100PC84C Footprint

XC3042-100PC84C 3D Model

Features of XC3042-100PC84C

Usable Logic Gate Capacity

XC3042-100PC84C provides approximately 3000 usable logic gates for implementing digital circuits. This capacity supports control logic, data routing, state machines, and arithmetic operations within a single programmable device. By integrating multiple logic functions into one component, it reduces the need for separate fixed logic ICs and supports compact board layouts.

Configurable Logic Block Structure

The device contains 144 Configurable Logic Blocks that form the core of its programmable architecture. Each block can be arranged to perform combinational and sequential logic functions. This structure allows designers to define custom hardware behavior based on application requirements while maintaining predictable digital operation.

User Input And Output Resources

XC3042-100PC84C includes 74 user accessible input and output pins. These pins enable direct connection to external memory, processors, control lines, and communication interfaces. The available I O count supports flexible system integration in embedded and legacy platforms.

Integrated On Chip Memory

The device incorporates 30784 total RAM bits within its internal structure. This memory can be used for temporary data storage, buffering, and logic related functions. Having built in RAM reduces reliance on external memory for moderate storage needs.

Standard 5 Volt Operating Range

XC3042-100PC84C operates within a supply voltage range of 4.75 volts to 5.25 volts. This range aligns with standard 5 volt digital systems and supports compatibility with TTL and CMOS based circuits commonly used in established designs.

Commercial Temperature Range

The specified operating temperature range is 0 degrees Celsius to 85 degrees Celsius. This makes the device suitable for controlled indoor commercial and industrial environments where stable thermal conditions are maintained.

84 Pin PLCC Package Format

The device is supplied in an 84 pin Plastic Leaded Chip Carrier package with J leads. This surface mount format supports secure board attachment and efficient use of printed circuit board space in medium density layouts.

SRAM Based Reprogrammable Architecture

XC3042-100PC84C uses an SRAM based configuration system. Its logic configuration is loaded at power up from an external source, allowing the device to be reprogrammed when design updates are required. This supports design flexibility without hardware replacement.

XC3000 Family Architecture Compatibility

The device follows the architecture of the XC3000 FPGA family. It supports established configuration methods and design approaches used within this product series, enabling consistent integration with related devices.

Speed Grade -100 Timing Classification

The -100 speed grade defines the timing performance category of the device. It indicates switching and propagation characteristics within the XC3000 family, supporting stable and predictable digital signal behavior in practical applications.

XC3042-100PC84C Technical Specifications

Product Attribute	Attribute Value
Manufacturer	AMD Xilinx
Voltage - Supply	4.75V ~ 5.25V
Total RAM Bits	30784
Supplier Device Package	84-PLCC (29.31x29.31)
Series	XC3000
Package / Case	84-LCC (J-Lead)
Package	Tray
Operating Temperature	0°C ~ 85°C (TJ)
Number of LABs/CLBs	144
Number of I/O	74
Number of Gates	3000
Mounting Type	Surface Mount
Base Product Number	XC3042
RoHs Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.39.0001

Architecture of XC3042-100PC84C

Structured around eight function blocks, each containing 18 macrocells, the device connects programmable logic resources through a central FastCONNECT II switch matrix that manages internal signal routing. Each function block interfaces with the matrix using 54 input lines and 18 output paths, supporting predictable interconnect delays typical of CPLD structures. I/O blocks positioned along the left side provide external pin connectivity and integrate global control signals labeled I O GCK, I O GSR, and I O GTS for clock, set reset, and tristate distribution. A JTAG controller and in system programming controller appear at the top, indicating boundary scan compliance and reprogrammable configuration capability. Bold signal paths show direct connections from function block outputs to the I O blocks, reducing routing stages for selected outputs.

AC Load Circuit of XC95144XL

Test load configuration connects the device output to a resistive divider formed by R1 tied to VTEST and R2 tied to ground, with a capacitive load CL connected from the output node to ground. The circuit models output switching conditions for AC timing measurements by defining controlled resistive and capacitive loading. A table specifies values for two operating levels, with VCCIO and VTEST set to 3.3 V using R1 of 320 ohms and R2 of 360 ohms, or 2.5 V using R1 of 250 ohms and R2 of 660 ohms, while CL remains 35 pF in both cases. This configuration establishes standardized loading parameters to evaluate output rise and fall characteristics under defined voltage conditions.

Applications of XC3042-100PC84C

Legacy Embedded System Maintenance

The XC3042-100PC84C is widely used to maintain embedded systems developed during the early adoption of programmable logic. Many control boards in manufacturing equipment, instrumentation, and communication hardware were designed around the XC3000 architecture. When these systems require repair, the device allows the original programmable logic to be restored without modifying the printed circuit board. This helps preserve system behavior, timing relationships, and signal compatibility.

Industrial Control Systems Based on XC3000 Architecture

In industrial control platforms built with XC3000 series devices, the XC3042-100PC84C manages sequencing, signal routing, and interface coordination between sensors and actuators. Its 5 volt operating range matches the logic levels used in older automation systems. The device can handle timing control, data path management, and discrete logic replacement within programmable hardware, allowing stable operation in long running production environments.

Retro Computing And Hardware Restoration Projects

The XC3042-100PC84C is used in retro computing projects that aim to preserve or recreate early programmable logic designs. It enables restoration of expansion cards, development boards, and interface modules originally built with XC3042 devices. By supporting the same configuration structure and pin layout, it helps maintain authentic hardware behavior while allowing reprogramming when design files are available.

Educational Study Of Early FPGA Architecture

The device serves as a teaching platform for understanding first generation SRAM based FPGA structures. Students can examine configurable logic blocks, internal memory resources, and external configuration methods in a real hardware device. Working with this architecture provides practical insight into how early programmable logic systems were organized and how digital functions were mapped into hardware.

Direct Replacement In Existing XC3042 Installations

The XC3042-100PC84C functions as a drop in replacement for systems that already use XC3042 series components. It supports the same package format, voltage range, and architectural structure, allowing repair or refurbishment of aging equipment. This approach extends the service life of legacy systems without requiring redesign or conversion to newer programmable platforms.

Device Part Marking XC3042-100PC84C

Package illustration presents the top view of a TQ144 device with labeled part marking fields that define ordering information. Device type appears as XC95xxxXL, indicating the family designation, while the package code TQ144 identifies the 144 pin thin quad flat package. Speed grade is marked as 7C, where the numeric value denotes timing performance and the letter indicates the commercial operating temperature range. A separate horizontal line is shown as not related to the device part number, distinguishing traceability or lot information from ordering identifiers. Pin 1 location is marked by a circular indicator at one corner to define package orientation.

XC3042-100PC84C Advantages and Disadvantages

Advantages

• SRAM based structure allows logic to be reprogrammed when design changes are required

• Established XC3000 architecture supports stable operation in long term legacy systems

• 5 volt supply range matches older TTL and CMOS logic levels

• Moderate gate count fits small to medium scale digital control tasks

• Commonly integrated in earlier embedded and industrial platforms

• 84 pin PLCC package supports compact surface mount board layouts

Disadvantages

• 5 volt operation does not align with modern low voltage digital systems

• Logic capacity is limited compared to current generation FPGA devices

• Power consumption is higher than newer low voltage programmable logic families

• Lacks embedded multipliers and dedicated signal processing resources

• Does not include advanced clock management or high speed interface features

• Development tool compatibility is restricted in modern FPGA design environments

XC3042-100PC84C Alternatives

Part Number	Manufacturer	Key Features	Use Case/Notes
XC3042-100PQ100C	AMD	XC3000 family FPGA with around 3,000 system gates and 144 configurable logic blocks. Operates from a 5V supply and supports surface-mount packaging.	Used in legacy programmable logic designs, interface control, and moderate-density digital applications.
XC3042-125PQ100C	AMD	Similar XC3042 device with alternate speed grade. Provides configurable logic resources and flexible I/O in a PQFP package.	Appropriate for digital control and communication circuits where timing requirements are moderate.
XC3030L-8VQ64C	AMD	Low-power FPGA from the XC3000L series with configurable logic blocks and compact package design. Designed for reduced power consumption.	Suitable for power-sensitive embedded systems and consumer electronic products.
XC3030L-8VQ64I	AMD	Industrial-grade low-power FPGA with extended temperature range and flexible programmable logic resources.	Used in industrial control and embedded systems requiring reliable operation in harsher environments.

About AMD Xilinx

AMD Xilinx operates as the adaptive and embedded computing division of Advanced Micro Devices, Inc. The organization traces its origins to Xilinx, Inc., founded in 1984 in California, where it introduced programmable logic devices that could be configured after manufacturing. Over the years, the company expanded into programmable platforms used in communications infrastructure, industrial automation, aerospace systems, automotive electronics, and data center acceleration. Its portfolio includes programmable logic devices, adaptive system on chip platforms, development software, and design tools that support hardware level customization. Following its acquisition by AMD in 2022, its technologies became part of a broader semiconductor portfolio that combines programmable logic with high performance processing solutions.

Conclusion

The XC3042-100PC84C gives you a practical way to manage programmable logic in 5V digital systems. With its SRAM-based structure, you can reload and update the configuration whenever needed. It offers a solid mix of logic capacity, internal RAM, and flexible I/O connections. The PLCC84 package keeps it easy to integrate into many board layouts. Whether you are maintaining older equipment or working on restoration projects, this device helps you keep original hardware running smoothly. It remains a dependable choice when compatibility and flexibility matter.

Datasheet PDF

XC3042-100PC84C Datasheet:

XC3042-100PC84C.pdf

XC3042-100PC84C.pdf