AT90PWM161OS-16SNR Equivalent & Substitute Parts

Part Overview

The AT90PWM161OS-16SNR is an AVR 8-bit microcontroller from Microchip Technology's 90PWM Lighting series, designed for embedded lighting control applications. This Surface Mount device operates at 16MHz with 16KB FLASH program memory and integrated PWM peripherals. The part is currently Active in product status with 681 units in stock. Substitute parts are identified when equivalent electrical specifications, memory configurations, and package compatibility align with application requirements.

Substiute Parts

AT90PWM161OS-16SNR

Microchip TechnologyIn Stock: 731AT90PWM161OS-16SNR Datasheet

Current PartRFQ

AT90PWM161-16SNR

Microchip TechnologyIn Stock: 1158AT90PWM161-16SNR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT90PWM161OS-16SNR is determined by strict alignment of the following critical parameters:

Core Electrical Specifications: Identical AVR core processor, 8-bit architecture, 16MHz operating speed, 16KB FLASH program memory, 512 x 8 EEPROM, and 1K x 8 RAM ensure functional equivalence in embedded lighting control applications.

Power Supply Compatibility: Voltage supply range of 2.7V ~ 5.5V must be maintained to ensure operation across the same power distribution systems.

Peripheral Feature Set: Presence of Brown-out Detect/Reset, Power-On Reset (POR), PWM, and Watchdog Timer (WDT) functions are required for lighting control functionality.

Data Conversion Capability: A/D converter configuration of 11x10-bit and D/A converter of 1x10-bit must be preserved.

Package Compatibility: 20-SOIC Surface Mount package with identical physical dimensions (0.295", 7.50mm Width) ensures PCB layout compatibility.

Compliance & Certification: ROHS3 compliance, MSL 3 rating, and REACH Unaffected status must be maintained.

The identified substitute part AT90PWM161-16SNR meets all these criteria with one documented variance: I/O pin count differs (16 I/O versus 20 I/O on the main part). This variance requires application-level verification.

Parameter Comparison

Engineering Selection Recommendations

AT90PWM161-16SNR Substitution Criteria:

The AT90PWM161-16SNR is electrically and mechanically compatible with the AT90PWM161OS-16SNR for applications where the I/O pin count reduction from 20 to 16 does not impact circuit functionality. Both parts maintain identical core processor architecture, memory configuration, operating voltage range, and peripheral feature set required for AVR 90PWM Lighting microcontroller applications.

Both parts carry Active product status from Microchip Technology, ensuring continued manufacturing support and supply chain availability. ROHS3 compliance and MSL 3 certification are maintained across both variants, meeting environmental and moisture handling requirements for Surface Mount assembly processes.

The documented I/O pin count variance (20 versus 16) is the sole electrical difference between these parts. Selection of the substitute part requires confirmation that the application design utilizes 16 or fewer I/O pins, or that unused pins on the main part can be eliminated from the circuit design without functional impact.

Frequently Asked Questions (FAQ)

Q: What is the primary difference between AT90PWM161OS-16SNR and AT90PWM161-16SNR?

A: The substitute part AT90PWM161-16SNR provides 16 I/O pins compared to 20 I/O pins on the main part AT90PWM161OS-16SNR. All other electrical specifications, memory configuration, operating parameters, and package dimensions are identical.

Q: Can AT90PWM161-16SNR be used as a direct replacement in existing PCB designs?

A: Direct replacement is possible only if the circuit design uses 16 or fewer I/O pins. If the original design requires all 20 I/O pins, the substitute part cannot be used without circuit redesign.

Q: Are both parts available in the same package?

A: Yes. Both AT90PWM161OS-16SNR and AT90PWM161-16SNR use the 20-SOIC Surface Mount package with identical physical dimensions (0.295", 7.50mm Width), ensuring PCB footprint compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, carry MSL 3 moisture sensitivity rating (168 Hours), and maintain REACH Unaffected status. Environmental and regulatory compliance is equivalent.

Q: What is the operating temperature range for both parts?

A: Both parts operate across the identical temperature range of -40°C to 105°C (TA), suitable for industrial and commercial lighting control applications.

Q: Are the memory specifications identical between both parts?

A: Yes. Both parts feature 16KB FLASH program memory, 512 x 8 EEPROM, and 1K x 8 RAM. Memory capacity and type are identical.

Q: What is the supply voltage compatibility?

A: Both parts operate across the identical voltage supply range of 2.7V to 5.5V, ensuring compatibility with standard power distribution systems.

Q: Do both parts include PWM functionality for lighting control?

A: Yes. Both parts include PWM, Brown-out Detect/Reset, Power-On Reset (POR), and Watchdog Timer (WDT) peripherals required for lighting control applications.