IA8X44PLC44IR3

Application Specific Microcontrollers Overview

The IA8X44PLC44IR3 is an 8-bit microcontroller based on the Intel 80C51 architecture, manufactured by Innovasic Semiconductor and distributed by Analog Devices Inc. It features a 12-MHz clock speed, 192 bytes of internal RAM, and supports up to 64 Kbytes each of external program and data memory. The device integrates a Serial Interface Unit (SIU) for SDLC/HDLC communication with a maximum data rate of 2.4 Mbps. It operates within a voltage range of 4.5 V to 5.5 V and is housed in a 44-pin Plastic Leaded Chip Carrier (PLCC) package.

Application Specific Microcontrollers Feature Summary

• Form, fit, and function compatible with Intel 8044 and 8344 series
• Integrated SIU supporting SDLC/HDLC protocols at 2.4 Mbps
• 192 bytes internal RAM and 64-Kbyte external memory addressing
• Four 8-bit I/O ports and two 16-bit timer/counters

Application Specific Microcontrollers Applications

• SDLC/HDLC communications controllers
• Embedded systems requiring 80C51 compatibility
• Industrial control applications

Application Specific Microcontrollers Procurement Notes

Verify that the component is sourced from authorized distributors to ensure authenticity, as Innovasic utilizes cloning technology for replacement ICs. Confirm the specific suffix indicates the PLCC package and RoHS compliance status if required. Cross-reference part numbers with the Intel 8044/8344 series documentation provided in the datasheet errata section to confirm functional equivalence.

Application Specific Microcontrollers Selection Notes

Select the IA8X44PLC44IR3 when an 80C51-compatible controller with integrated serial protocol handling is needed. Ensure the design accommodates the 4.5 V to 5.5 V supply voltage range. Verify that the 44-pin PLCC footprint matches the PCB layout, noting the specific pin assignments for the PLCC variant differ from the PDIP version.

Application Specific Microcontrollers Part Context

This component belongs to the IA8044/IA8344 family produced by Innovasic Semiconductor. It serves as a drop-in replacement for legacy Intel 8044 and 8344 microcontrollers. The 'PLC' suffix denotes the 44-pin PLCC package, while 'I' typically indicates industrial temperature range and 'R3' may refer to specific packaging or revision details defined by the distributor.

Application Specific Microcontrollers Replacement Considerations

The IA8044 and IA8344 are direct replacements for Intel 8044 and 8344 devices. Check the Errata section of the datasheet for known functional differences between the Innovasic clone and the original Intel silicon before finalizing the design.

Application Specific Microcontrollers FAQ

Does the IA8X44PLC44IR3 have internal ROM?

No, the IA8344 variant (which corresponds to the PLC package designation in this context) contains 192 bytes of internal RAM but no internal ROM. Program execution relies on external program memory.

What is the maximum serial data rate supported?

The integrated Serial Interface Unit (SIU) supports a maximum serial data rate of 2.4 Mbps.

Is the device compatible with standard 80C51 instructions?

Yes, the IA8044 and IA8344 execute all ASM51 instructions and are fully compatible with the Intel 80C51 instruction set.