APA300-FG144I ProASICPLUS FPGA for Programmable Logic Design

ElecSuppliers Part Number GuideAug 29, 2026

When an electronic system needs custom digital logic, a fixed-function IC is not always enough. Different products may require different logic relationships, timing functions, interfaces or data-processing paths, while developing a dedicated ASIC can be too expensive for smaller production volumes.

This is where a programmable FPGA can provide a useful middle ground.

APA300-FG144I belongs to the ProASICPLUS FPGA family and provides approximately 300,000 system gates, 8,192 registers, 72 Kbit of embedded RAM and 100 user I/Os in a 144-pin FBGA package. The device is designed for programmable digital logic applications where hardware behavior needs to be defined by the system designer.

For existing equipment, APA300-FG144I is also an interesting component from a maintenance perspective because the exact package and industrial temperature variant can matter as much as the FPGA logic capacity itself.

APA300-FG144I Programmable Logic Architecture

The fundamental difference between an FPGA and a conventional digital IC is that the FPGA's internal logic can be configured according to the application.

Instead of purchasing a chip with one permanently defined function, engineers can implement their own digital architecture inside the programmable fabric.

That architecture might include:

Control logic

State machines

Counters

Timing circuits

Parallel data paths

Interface logic

Signal processing functions

The FPGA can therefore become the central programmable logic section of a system.

300K-Gate APA300 FPGA

The APA300 designation identifies the 300,000-system-gate class within the ProASICPLUS family.

This capacity places the device well above the smallest programmable logic devices while remaining considerably more compact than much larger FPGA families.

For a product with a moderate amount of custom logic, this can provide enough programmable resources without requiring a very large FPGA package.

The available logic resources also make it possible to consolidate several discrete logic functions into one programmable device.

APA300-FG144I Embedded RAM

Logic capacity is only part of an FPGA design.

Digital systems often need temporary storage for intermediate data, buffers, lookup structures or control information.

APA300-FG144I provides 72 Kbit of embedded RAM, implemented through multiple embedded RAM blocks.

This allows designers to keep certain data-storage functions inside the FPGA instead of adding a separate memory device for every small buffering requirement.

APA300-FG144I 100 User I/Os

The FG144 package provides 100 user I/O connections for APA300-FG144I.

For an FPGA, I/O count has a direct influence on the types of systems that can be implemented.

A design may need connections to several external devices at the same time.

For example, one group of pins could connect to a processor, another to an external memory device and additional signals could connect to control circuitry.

The 100-I/O configuration provides considerable flexibility for a moderate-size digital system.

APA300-FG144I for Custom Digital Logic

One of the most useful applications for APA300-FG144I is replacing a collection of individual logic devices with programmable logic.

A traditional board might require separate chips for:

Counters

Logic gates

Timing generation

Interface conversion

State-machine control

Data buffering

With an FPGA, many of these functions can be implemented inside one programmable device.

This can reduce the number of components on the PCB and make the logic architecture easier to modify during development.

APA300-FG144I and State Machine Design

Many industrial controllers rely on state machines.

A machine may move through states such as:

Idle

Initialization

Ready

Running

Warning

Fault

Shutdown

The FPGA can implement these relationships directly in hardware logic.

This approach can provide deterministic behavior without requiring every event to be handled sequentially by a microcontroller.

For applications where timing relationships are important, hardware-based state machines can be particularly useful.

APA300-FG144I Parallel Data Processing

A microcontroller generally executes instructions sequentially.

An FPGA can perform multiple hardware operations concurrently.

This difference becomes valuable when a system needs several signals to be monitored or processed at the same time.

For example, an FPGA can contain separate logic paths for input monitoring, timing generation and data buffering while all of these functions operate concurrently.

APA300-FG144I can therefore be considered when a design needs hardware-level parallelism but does not justify developing a dedicated ASIC.

APA300-FG144I Timing Control

Digital systems often contain timing relationships that are difficult to manage using software alone.

An FPGA can create counters, timing windows and synchronized control signals directly within programmable logic.

The ProASICPLUS family includes global clock networks intended to distribute clock signals through the device.

For system designers, this provides another way to organize timing-sensitive logic within the FPGA rather than spreading timing functions across multiple external ICs.

APA300-FG144I PLL Resources

APA300 devices include PLL resources that can be used in clock-management designs.

Clock management can be useful when the external system clock does not directly match the frequencies required by different sections of the design.

Instead of creating every clock externally, selected timing functions can be handled within the programmable logic architecture.

The actual clock configuration should always be evaluated against the requirements of the finished design.

APA300-FG144I Flash-Based FPGA

An important characteristic of the ProASICPLUS architecture is its Flash-based programmable technology.

This differs from FPGA families that depend on an external configuration memory to load their logic after power-up.

For system designers, the configuration architecture can influence the startup sequence, PCB design and overall system complexity.

This is particularly interesting in equipment where predictable power-up behavior is important.

APA300-FG144I Power-Up Architecture

The FPGA configuration method becomes relevant when designing the complete system.

A programmable device that requires external configuration management can add another device and another stage to the startup process.

A Flash-based FPGA architecture can simplify parts of this arrangement.

For industrial equipment, reducing the number of components involved in system initialization can also make troubleshooting easier.

APA300-FG144I Industrial Temperature Version

The I suffix identifies the industrial temperature version.

This matters when the FPGA is used in equipment exposed to a wider operating temperature range.

The APA300-FG144I variant is specified for industrial-temperature operation, unlike the commercial version with the same basic FPGA architecture.

For an existing industrial PCB, changing from an industrial-grade device to a commercial-grade variant should not be treated as a simple part-number substitution.

APA300-FG144I 2.5V FPGA

APA300-FG144I operates from a core supply in the approximately 2.3V to 2.7V range, with 2.5V as the nominal supply level. Its I/O configuration supports 2.5V and 3.3V signaling options depending on the selected I/O standard.

This distinction is important during PCB design.

The FPGA core supply and external I/O voltage environment should be considered separately.

A board that connects APA300-FG144I to multiple voltage domains needs to configure the I/O banks appropriately.

APA300-FG144I I/O Planning

FPGA pin assignment should be planned before PCB routing begins.

The designer needs to consider which pins are connected to:

Clock inputs

Reset signals

High-speed interfaces

External memory

Control signals

General-purpose I/O

Power and ground

Changing the pin assignment late in development can force PCB changes.

For an existing design, the original pin mapping is therefore a critical part of FPGA replacement.

APA300-FG144I PCB Design

A 144-pin FBGA package allows a relatively compact implementation, but it also requires careful PCB design.

The FPGA should have an appropriate power distribution network around its supply pins.

Decoupling capacitors should be positioned according to the power architecture.

High-speed signals should have controlled routing and appropriate return paths.

The BGA fan-out strategy should also be considered during the initial PCB layout rather than after the schematic is completed.

APA300-FG144I in Communication Equipment

Programmable logic can be useful in communication equipment because different interfaces often need custom control logic.

An FPGA can handle protocol-related state machines, data buffering, timing generation and interface management.

This can allow the same basic hardware platform to support different firmware or logic configurations.

For specialized communication equipment, this flexibility can be more valuable than simply selecting a processor with a higher clock frequency.

APA300-FG144I in Industrial Control

Industrial control systems frequently contain deterministic logic.

A controller may need to react to external events within a predictable time window.

Hardware logic implemented in an FPGA can handle certain time-critical operations independently of a software processor.

APA300-FG144I can therefore be used as the programmable logic element alongside a microcontroller or processor.

The FPGA does not necessarily have to replace the CPU.

In many systems, the two devices perform different jobs.

APA300-FG144I FPGA and Microcontroller

An MCU is usually better suited to sequential application processing.

An FPGA is better suited to parallel hardware logic.

Combining them can create a useful architecture.

The MCU can manage:

User interfaces

Configuration

Communication protocols

System monitoring

Parameter management

The FPGA can manage:

Precise timing

Parallel signal processing

Custom interfaces

High-speed control logic

This division can reduce the processing burden on the MCU.

APA300-FG144I Replacement Considerations

Replacing an APA300-FG144I requires more than matching the number of gates.

Engineers should compare:

FPGA architecture

Logic capacity

Embedded RAM

I/O count

Clock resources

PLL resources

I/O standards

Core voltage

Package

Pin assignment

Temperature grade

Programming method

A newer FPGA may offer significantly greater performance but still be unsuitable as a direct replacement because its package, power requirements or configuration process may be different.

APA300-FG144I Package Compatibility

The FG144 designation identifies the 144-pin fine-pitch BGA configuration.

APA300-FG144I is supplied in a 144-FBGA package with a compact footprint.

For a production PCB that has already been qualified, maintaining this package can be important.

Even if another FPGA offers similar logic resources, changing the package can require PCB redesign, new assembly parameters and another round of system testing.

APA300-FG144I Sourcing

For procurement, the full part number APA300-FG144I should be used.

The APA300 family includes multiple package configurations and different temperature variants.

For an existing BOM, the difference between FG144, other package versions and commercial or industrial ordering variants can be significant.

Suppliers should therefore confirm the exact manufacturer part number before quotation and shipment.

APA300-FG144I for Existing FPGA Designs

APA300-FG144I is a useful example of why FPGA selection is closely connected to the overall hardware architecture.

Its value is not simply the 300K-gate figure.

The combination of programmable logic, embedded RAM, I/O resources, clock functions, Flash-based configuration and the FG144 package determines how the device fits into an actual PCB.

For a new programmable-logic project, engineers need to evaluate the required logic capacity and I/O architecture first.

For an existing product, however, the exact APA300-FG144I configuration can be much more important because the FPGA may already be tied to a validated PCB, pin assignment and programmed logic design.