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ATMEGA16L-8AC Equivalent & Substitute Parts
Part Overview
The ATMEGA16L-8AC is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 16KB of FLASH program memory, 1KB of RAM, and 512 bytes of EEPROM. This device integrates 32 I/O pins, internal oscillator, and peripheral support for I2C, SPI, and UART/USART communication protocols. The ATMEGA16L-8AC is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 8MHz |
| Program Memory Size | 16KB (8K x 16) |
| Program Memory Type | FLASH |
| RAM Size | 1K x 8 |
| EEPROM Size | 512 x 8 |
| Number of I/O | 32 |
| Voltage Supply (Vcc/Vdd) | 2.7V ~ 5.5V |
| Data Converters | A/D 8x10b |
| Connectivity | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Package / Case | 44-TQFP (10x10) |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution of the ATMEGA16L-8AC is determined by strict equivalence across the following critical parameters:
- Core Architecture: AVR processor family
- Memory Configuration: 16KB FLASH, 1KB RAM, 512 bytes EEPROM
- I/O Count: 32 pins minimum
- Operating Voltage: 2.7V to 5.5V supply range
- Package Format: 44-TQFP (10x10) surface mount
- Connectivity Interfaces: I2C, SPI, UART/USART support
- Peripheral Set: Brown-out Detect/Reset, POR, PWM, WDT
The ATMEGA16L-8AU meets all substitution criteria, maintaining identical electrical specifications and pinout compatibility while offering improved product status and compliance certifications.
Parameter Comparison
| Parameter | ATMEGA16L-8AC | ATMEGA16L-8AU |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Core Processor | AVR | AVR |
| Core Size | 8-Bit | 8-Bit |
| Speed | 8MHz | 8MHz |
| Program Memory Size | 16KB (8K x 16) | 16KB (8K x 16) |
| Program Memory Type | FLASH | FLASH |
| RAM Size | 1K x 8 | 1K x 8 |
| EEPROM Size | 512 x 8 | 512 x 8 |
| Number of I/O | 32 | 32 |
| Voltage Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Data Converters | A/D 8x10b | A/D 8x10b |
| Connectivity | I2C, SPI, UART/USART | I2C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT |
| Package / Case | 44-TQFP (10x10) | 44-TQFP (10x10) |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Packaging | Not specified | Tray |
Engineering Selection Recommendations
The ATMEGA16L-8AU is the direct functional equivalent for ATMEGA16L-8AC replacement. Selection of the ATMEGA16L-8AU is supported by the following factors:
- Product Status: The ATMEGA16L-8AU maintains active product status, ensuring continued availability and manufacturing support, whereas the ATMEGA16L-8AC is obsolete.
- Compliance Certifications: The ATMEGA16L-8AU is ROHS3 compliant, meeting current environmental and regulatory requirements. The ATMEGA16L-8AC is RoHS non-compliant.
- Operating Temperature Range: The ATMEGA16L-8AU supports an extended operating temperature range of -40°C to 85°C, compared to the ATMEGA16L-8AC range of 0°C to 70°C, providing greater thermal flexibility for diverse application environments.
- Electrical Equivalence: All core electrical parameters, memory configuration, I/O count, connectivity interfaces, and peripheral functionality are identical between both devices.
- Pinout Compatibility: Both devices utilize the 44-TQFP (10x10) package format, ensuring direct PCB compatibility without layout modifications.
Frequently Asked Questions (FAQ)
Q: Are ATMEGA16L-8AC and ATMEGA16L-8AU pin-for-pin compatible?
A: Yes. Both devices use the 44-TQFP (10x10) package format with identical pinout configuration. Direct PCB substitution is possible without layout changes.
Q: What is the primary reason to substitute ATMEGA16L-8AC with ATMEGA16L-8AU?
A: The ATMEGA16L-8AC is classified as obsolete. The ATMEGA16L-8AU is the active equivalent, ensuring long-term supply availability and manufacturing support.
Q: Do the devices have identical memory specifications?
A: Yes. Both devices feature 16KB FLASH program memory, 1KB RAM, and 512 bytes EEPROM with identical access characteristics.
Q: What is the difference in operating temperature range?
A: The ATMEGA16L-8AC operates from 0°C to 70°C. The ATMEGA16L-8AU operates from -40°C to 85°C, providing extended thermal coverage for industrial and extended-temperature applications.
Q: Are there compliance differences between the two parts?
A: Yes. The ATMEGA16L-8AU is ROHS3 compliant, while the ATMEGA16L-8AC is RoHS non-compliant. For applications requiring RoHS compliance, the ATMEGA16L-8AU is the required selection.
Q: Do both devices support the same communication protocols?
A: Yes. Both devices support I2C, SPI, and UART/USART connectivity with identical peripheral implementation.
Q: What packaging formats are available for the ATMEGA16L-8AU?
A: The ATMEGA16L-8AU is supplied in Tray packaging. The ATMEGA16L-8AC packaging format is not specified in available documentation.
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