TS87C52X2-LCA Equivalent & Substitute Parts

Part Overview

The TS87C52X2-LCA is an 80C51-based 8-bit microcontroller manufactured by Microchip Technology, featuring 8KB OTP program memory and 256 bytes of RAM in a 40-PDIL package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The part operates across a 2.7V to 5.5V supply range with an internal oscillator and supports UART/USART connectivity with power-on reset functionality.

Substiute Parts

TS87C52X2-LCA

Microchip TechnologyIn Stock: 1179TS87C52X2-LCA Datasheet

Current PartRFQ

DS87C520-MCL+

Analog Devices Inc./Maxim IntegratedIn Stock: 2458DS87C520-MCL+ Datasheet

MFR RecommendedRFQ

DS87C520-MNL+

Analog Devices Inc./Maxim IntegratedIn Stock: 1279DS87C520-MNL+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TS87C52X2-LCA is based on the following critical parameters:

• Core Processor Compatibility: Both substitute parts use the 8051 core processor, maintaining instruction set compatibility with the 80C51 architecture
• Package Compatibility: All parts use 40-DIP (0.600", 15.24mm) through-hole packaging, ensuring mechanical and electrical pin compatibility
• I/O Count: All parts provide 32 I/O lines, maintaining functional equivalence
• Memory Architecture: OTP program memory with RAM storage, though substitute parts offer increased program memory capacity (16KB vs 8KB)
• Supply Voltage Range: Substitute parts operate within 4.5V ~ 5.5V, which overlaps with the original part's 2.7V ~ 5.5V range
• Operating Temperature: Substitute parts support the original 0°C ~ 70°C range, with DS87C520-MNL+ extending to -40°C ~ 85°C

The DS87C520-MCL+ and DS87C520-MNL+ are functionally equivalent substitutes manufactured by Analog Devices Inc./Maxim Integrated, offering enhanced specifications including higher clock speed (33MHz), larger program memory (16KB), and improved peripheral integration.

Parameter Comparison

Engineering Selection Recommendations

DS87C520-MCL+ is suitable for applications requiring standard industrial temperature operation (0°C ~ 70°C) with active product status and ROHS3 compliance. This part maintains compatibility with the original TS87C52X2-LCA while offering enhanced memory capacity and processing speed.

DS87C520-MNL+ is recommended for applications requiring extended temperature range operation (-40°C ~ 85°C), providing the same functional enhancements as the DS87C520-MCL+ with broader environmental specifications. Both substitute parts are manufactured by Analog Devices Inc./Maxim Integrated and carry active product status, ensuring long-term availability and supply chain continuity.

The transition from the obsolete TS87C52X2-LCA to either DS87C520 variant provides improved compliance posture through ROHS3 certification and enhanced peripheral integration including watchdog timer functionality.

Frequently Asked Questions (FAQ)

Q: Are the DS87C520-MCL+ and DS87C520-MNL+ pin-compatible with the TS87C52X2-LCA?

A: Yes. All three parts use the 40-DIP (0.600", 15.24mm) through-hole package with identical pin counts and I/O configuration (32 I/O lines), ensuring direct mechanical and electrical compatibility.

Q: What is the primary difference between DS87C520-MCL+ and DS87C520-MNL+?

A: The operating temperature range differs. DS87C520-MCL+ operates from 0°C ~ 70°C, while DS87C520-MNL+ extends to -40°C ~ 85°C. Both parts are otherwise functionally identical.

Q: Will the increased program memory (16KB vs 8KB) affect compatibility?

A: No. The larger program memory in the DS87C520 variants is a functional enhancement that does not impact compatibility. Existing code designed for 8KB will execute without modification on the 16KB devices.

Q: What is the impact of the supply voltage range difference?

A: The TS87C52X2-LCA supports 2.7V ~ 5.5V, while DS87C520 variants support 4.5V ~ 5.5V. Applications operating below 4.5V require verification of circuit design compatibility before substitution.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both DS87C520-MCL+ and DS87C520-MNL+ are ROHS3 compliant, whereas the original TS87C52X2-LCA is RoHS non-compliant.

Q: What additional peripherals do the substitute parts provide?

A: The DS87C520 variants include watchdog timer (WDT) and power-fail reset functionality, compared to power-on reset (POR) only in the original part. These enhancements improve system reliability without affecting pin compatibility.