TS80C31X2-VIA Equivalent & Substitute Parts

Part Overview

The TS80C31X2-VIA is an 8-bit microcontroller from the 80C series manufactured by Microchip Technology. This ROMless device operates at 60/30MHz with 32 I/O pins and 128 x 8 bytes of RAM, housed in a 40-PDIL package. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Substiute Parts

TS80C31X2-VIA

Microchip TechnologyIn Stock: 1089TS80C31X2-VIA Datasheet

Current PartRFQ

AT89S51-24PU

Microchip TechnologyIn Stock: 11094AT89S51-24PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TS80C31X2-VIA is determined by the following critical parameters:

• Core Architecture: 8051-compatible processor family (80C51 or 89S series)
• Package Compatibility: 40-DIP form factor with 0.600" (15.24mm) pitch
• Pin Count & I/O: 32 I/O pins minimum
• RAM Configuration: 128 x 8 bytes minimum
• Voltage Range: 4.0V ~ 5.5V supply compatibility
• Operating Temperature: -40°C ~ 85°C range
• Memory Architecture: ROMless or FLASH-based variants acceptable

The AT89S51-24PU qualifies as a direct substitute based on these parameters. While it features FLASH memory (4KB) instead of ROMless architecture, it maintains full 8051 instruction set compatibility, identical pin configuration, and equivalent electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The AT89S51-24PU is suitable for applications requiring TS80C31X2-VIA replacement based on the following factors:

• Product Status: The substitute is active and in production, ensuring long-term availability and supply chain stability.
• Compliance: The AT89S51-24PU meets ROHS3 compliance requirements, whereas the original part is non-compliant. This is significant for applications subject to environmental regulations.
• Electrical Compatibility: Both devices operate within overlapping voltage ranges (4.0V ~ 5.5V for the substitute encompasses the original 4.5V ~ 5.5V specification) and identical temperature ranges.
• Pin & Package Compatibility: Identical 40-DIP package and pin configuration enable direct socket replacement without PCB redesign.
• Memory Architecture Difference: The substitute provides 4KB FLASH memory versus the ROMless design of the original. Applications requiring external program memory must account for this functional change.
• Speed Consideration: The substitute operates at 24MHz maximum, lower than the original 60/30MHz specification. This may impact timing-critical applications.

Frequently Asked Questions (FAQ)

Q: Can the AT89S51-24PU directly replace the TS80C31X2-VIA in existing designs?

A: Physical and electrical replacement is possible due to identical pin configuration, package format, and voltage/temperature specifications. However, the FLASH memory architecture of the substitute differs from the ROMless design of the original. Applications using external program memory must be re-evaluated for compatibility with the integrated FLASH approach.

Q: What is the primary difference between these two microcontrollers?

A: The TS80C31X2-VIA is a ROMless device requiring external program memory, while the AT89S51-24PU integrates 4KB of FLASH memory. Both share the same 8051 instruction set, pin configuration, and core specifications.

Q: Are there speed implications when substituting the AT89S51-24PU?

A: Yes. The substitute operates at a maximum of 24MHz compared to the original 60/30MHz specification. Applications with timing-dependent functions must verify that 24MHz operation meets performance requirements.

Q: Does the substitute meet modern compliance standards?

A: The AT89S51-24PU is ROHS3 compliant and REACH unaffected, whereas the original TS80C31X2-VIA is RoHS non-compliant. This makes the substitute suitable for applications subject to environmental regulations.

Q: Is the 40-DIP package still widely available?

A: The AT89S51-24PU is available in active production with 11,000 units in stock. The 40-DIP through-hole package remains standard for this device family.

Q: What supply voltage range does the substitute support?

A: The AT89S51-24PU operates from 4.0V to 5.5V, which is compatible with the original specification of 4.5V to 5.5V. The wider lower voltage limit provides additional design flexibility.