AT89LS52-16AC Equivalent & Substitute Parts

Part Overview

The AT89LS52-16AC is an 8051-based 8-bit microcontroller manufactured by Microchip Technology, featuring 8KB FLASH program memory, 256 bytes of RAM, and 32 I/O pins operating at 16MHz. This device is classified as obsolete and is no longer in active production. Finding equivalent substitute parts is necessary due to limited availability and the product's end-of-life status. The AT89LS52-16AU serves as the direct manufacturer-recommended substitute, offering identical core functionality with improved product status and compliance certifications.

Substiute Parts

AT89LS52-16AC

Microchip TechnologyIn Stock: 1220AT89LS52-16AC Datasheet

Current PartRFQ

AT89LS52-16AU

Microchip TechnologyIn Stock: 2098AT89LS52-16AU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT89LS52-16AC with the AT89LS52-16AU is based on strict equivalence across all critical electrical and mechanical parameters. Both devices share identical core specifications: 8051 processor architecture, 8-bit core size, 16MHz clock speed, 8KB FLASH memory, 256 bytes RAM, 32 I/O pins, 2.7V to 4V supply voltage range, and 44-TQFP surface mount packaging. The substitution is valid because all allowed electrical parameters for this microcontroller category remain unchanged between the two part numbers. The primary differentiator is product lifecycle status and compliance certifications rather than functional capability.

Parameter Comparison

Engineering Selection Recommendations

The AT89LS52-16AU is the direct substitute for the AT89LS52-16AC based on manufacturer designation. Selection of the AT89LS52-16AU is supported by its active product status, ensuring long-term availability and supply chain reliability. The substitute offers ROHS3 compliance, meeting current environmental and regulatory requirements, whereas the main part is RoHS non-compliant. The extended operating temperature range of -40°C to 85°C on the substitute provides broader thermal operating conditions compared to the main part's 0°C to 70°C range. Both devices maintain identical electrical specifications, package geometry, and pin configuration, ensuring direct functional equivalence in circuit applications.

Frequently Asked Questions (FAQ)

Q: Are the AT89LS52-16AC and AT89LS52-16AU pin-compatible? A: Yes. Both devices use the 44-TQFP (10x10) surface mount package with identical pin assignments, I/O configuration (32 pins), and electrical characteristics. Direct substitution on the PCB is possible without layout modifications.

Q: What is the difference between the -16AC and -16AU suffix designations? A: The suffix indicates packaging and product lifecycle status. The -16AC uses tube packaging and is obsolete. The -16AU uses tray packaging and maintains active product status with current manufacturing support.

Q: Can the AT89LS52-16AU operate in the same voltage range as the AT89LS52-16AC? A: Yes. Both devices operate within the 2.7V to 4V supply voltage range. The substitute maintains full compatibility with existing power supply designs.

Q: Does the extended temperature range of the AT89LS52-16AU affect compatibility? A: No. The extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) represents an expansion of the operating envelope. Applications designed for the main part's temperature range operate identically on the substitute.

Q: Is the AT89LS52-16AU RoHS compliant? A: Yes. The AT89LS52-16AU is ROHS3 compliant, meeting current environmental regulations. The original AT89LS52-16AC is RoHS non-compliant.

Q: Are there any memory or performance differences between these parts? A: No. Both devices feature identical 8KB FLASH program memory, 256 bytes RAM, 16MHz clock speed, and peripheral configuration (UART/USART, WDT). Functional performance is equivalent.

Q: What is the moisture sensitivity level for both parts? A: Both the AT89LS52-16AC and AT89LS52-16AU have MSL 3 rating with a 168-hour floor life. Identical moisture handling and storage procedures apply to both devices.