ATMEGA8-16AC Equivalent & Substitute Parts

Part Overview

The ATMEGA8-16AC is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 8KB of FLASH program memory, 1KB of RAM, and 512 bytes of EEPROM. This device operates at 16MHz with integrated peripherals including I2C, SPI, and UART/USART connectivity, along with brown-out detection, power-on reset, PWM, and watchdog timer functionality. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity.

Substiute Parts

ATMEGA8-16AC

Microchip TechnologyIn Stock: 10494ATMEGA8-16AC Datasheet

Current PartRFQ

ATMEGA8-16AU

Microchip TechnologyIn Stock: 1257ATMEGA8-16AU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ATMEGA8-16AC is determined by strict equivalence across core electrical and mechanical parameters. The substitute part must maintain identical specifications for processor architecture, memory configuration, clock speed, I/O count, peripheral set, package type, and pinout. The ATMEGA8-16AU qualifies as a direct substitute based on matching all critical parameters: identical AVR core, 8-bit architecture, 16MHz operation, 8KB FLASH, 1KB RAM, 512-byte EEPROM, 23 I/O pins, identical connectivity (I2C, SPI, UART/USART), matching peripheral features, and 32-TQFP (7x7) package with surface mount configuration. The primary distinction between these parts lies in product status, operating temperature range, RoHS compliance, and packaging format, which do not affect functional substitution in equivalent circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The ATMEGA8-16AU is the direct functional equivalent for ATMEGA8-16AC replacement. Both devices share identical electrical specifications, memory architecture, peripheral configuration, and physical package format. The ATMEGA8-16AU is preferred for new designs and production continuity due to its active product status, extended operating temperature range (-40°C to 85°C versus 0°C to 70°C), and ROHS3 compliance. Applications requiring the original operating temperature specification of 0°C to 70°C remain compatible with the ATMEGA8-16AU, which exceeds this range. The extended temperature capability of the substitute part introduces no functional limitations for standard industrial applications. Pinout compatibility is absolute, requiring no circuit modifications for direct substitution.

Frequently Asked Questions (FAQ)

Q: Are ATMEGA8-16AC and ATMEGA8-16AU pin-for-pin compatible? A: Yes. Both devices use the 32-TQFP (7x7) package with identical pinout. Direct substitution on PCBs designed for ATMEGA8-16AC is possible without layout modifications.

Q: What is the primary reason for substituting ATMEGA8-16AC? A: ATMEGA8-16AC is classified as obsolete. ATMEGA8-16AU is the active equivalent from Microchip Technology, ensuring long-term availability and supply chain continuity.

Q: Do the devices have identical memory specifications? A: Yes. Both contain 8KB FLASH program memory, 1KB RAM, and 512 bytes EEPROM with identical organization and access characteristics.

Q: How do operating temperature ranges differ? A: ATMEGA8-16AC operates from 0°C to 70°C. ATMEGA8-16AU operates from -40°C to 85°C. The substitute part supports a wider temperature envelope, suitable for extended environmental conditions.

Q: Is RoHS compliance a functional difference? A: No. RoHS compliance affects material composition and environmental impact, not electrical function. ATMEGA8-16AU meets ROHS3 standards while ATMEGA8-16AC does not. This distinction is relevant for regulatory and procurement requirements, not circuit performance.

Q: Can ATMEGA8-16AU be used in applications originally designed for ATMEGA8-16AC? A: Yes. Identical electrical specifications, memory configuration, peripheral set, and pinout ensure full functional compatibility. No firmware, circuit design, or PCB modifications are required.

Q: What packaging formats are available? A: ATMEGA8-16AC packaging format is not specified in available data. ATMEGA8-16AU is supplied in Tray format. Confirm packaging requirements with your procurement specification.