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ATMEGA169A-MUR Equivalent & Substitute Parts
Part Overview
The ATMEGA169A-MUR is an 8-bit AVR microcontroller from Microchip Technology's ATmega series, featuring 16KB of FLASH program memory, 1KB of RAM, and 512 bytes of EEPROM. This device operates at 16MHz with a supply voltage range of 1.8V to 5.5V and is housed in a 64-QFN (9x9) surface mount package. The part is currently in active production status with full RoHS3 compliance and verified programmability through DiGi-Electronics. Substitute parts are identified when equivalent electrical specifications, memory configurations, and package formats are maintained across the product line.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 16MHz |
| Program Memory Size | 16KB (8K x 16) |
| Program Memory Type | FLASH |
| EEPROM Size | 512 x 8 |
| RAM Size | 1K x 8 |
| Voltage Supply (Vcc/Vdd) | 1.8V ~ 5.5V |
| Number of I/O | 54 |
| Data Converters | A/D 8x10b |
| Connectivity | SPI, UART/USART, USI |
| Peripherals | Brown-out Detect/Reset, LCD, POR, PWM, WDT |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 64-VFQFN Exposed Pad |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitute parts for the ATMEGA169A-MUR are identified based on strict equivalence of the following critical parameters:
- Core processor architecture (AVR)
- Core size (8-Bit)
- Operating frequency (16MHz)
- Program memory capacity and type (16KB FLASH)
- EEPROM and RAM configuration (512 x 8 and 1K x 8 respectively)
- Supply voltage range (1.8V ~ 5.5V)
- I/O count (54 pins)
- Peripheral feature set (Brown-out Detect/Reset, LCD, POR, PWM, WDT)
- Connectivity interfaces (SPI, UART/USART, USI)
- Data converter specifications (A/D 8x10b)
- Package format (64-QFN 9x9)
- Compliance certifications (RoHS3, REACH Unaffected)
The ATMEGA169PA-MUR meets all these criteria and is classified as a parametric equivalent. Packaging format variations (Tape & Reel vs. Cut Tape & Digi-Reel) do not affect functional or electrical equivalence.
Parameter Comparison
| Parameter | ATMEGA169A-MUR | ATMEGA169PA-MUR |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Core Processor | AVR | AVR |
| Core Size | 8-Bit | 8-Bit |
| Speed | 16MHz | 16MHz |
| Program Memory Size | 16KB (8K x 16) | 16KB (8K x 16) |
| Program Memory Type | FLASH | FLASH |
| EEPROM Size | 512 x 8 | 512 x 8 |
| RAM Size | 1K x 8 | 1K x 8 |
| Voltage Supply (Vcc/Vdd) | 1.8V ~ 5.5V | 1.8V ~ 5.5V |
| Number of I/O | 54 | 54 |
| Data Converters | A/D 8x10b | A/D 8x10b |
| Connectivity | SPI, UART/USART, USI | SPI, UART/USART, USI |
| Peripherals | Brown-out Detect/Reset, LCD, POR, PWM, WDT | Brown-out Detect/Reset, LCD, POR, PWM, WDT |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 64-VFQFN Exposed Pad | 64-VFQFN Exposed Pad |
| Product Status | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 3 (168 Hours) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
Both the ATMEGA169A-MUR and ATMEGA169PA-MUR are active production devices from Microchip Technology with identical electrical and functional specifications. Selection between these parts is determined by packaging and availability requirements rather than technical performance differences.
The ATMEGA169A-MUR is supplied in Tape & Reel (TR) format with 895 units currently in stock. The ATMEGA169PA-MUR is supplied in Cut Tape (CT) and Digi-Reel format with 3200 units in stock. Both devices maintain RoHS3 compliance, REACH unaffected status, and identical MSL ratings. DiGi-Electronics programmability verification applies to both variants. Selection should be based on procurement volume requirements, supply chain availability, and packaging format compatibility with assembly processes.
Frequently Asked Questions (FAQ)
Q: Are ATMEGA169A-MUR and ATMEGA169PA-MUR pin-compatible?
A: Yes. Both devices use the 64-QFN (9x9) package format with identical pin assignments, electrical characteristics, and functional specifications.
Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel packaging?
A: Tape & Reel (TR) is continuous reel packaging for high-volume automated assembly. Cut Tape (CT) and Digi-Reel are pre-cut formats suitable for smaller quantities or manual handling. Electrical and functional performance is identical.
Q: Can I substitute ATMEGA169PA-MUR for ATMEGA169A-MUR in existing designs?
A: Yes. The parts are parametric equivalents with identical core specifications, memory configuration, I/O count, peripheral features, and operating parameters. No design modifications are required.
Q: Are both parts RoHS3 compliant?
A: Yes. Both ATMEGA169A-MUR and ATMEGA169PA-MUR are RoHS3 compliant with identical MSL ratings of 3 (168 Hours).
Q: What is the supply voltage range for these microcontrollers?
A: Both devices operate across 1.8V to 5.5V, supporting applications requiring wide voltage tolerance.
Q: How many I/O pins are available on the 64-QFN package?
A: The ATMEGA169A-MUR and ATMEGA169PA-MUR provide 54 I/O pins in the 64-QFN (9x9) package format.
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