ATMEGA164P-15MZ Equivalent & Substitute Parts

Part Overview

The ATMEGA164P-15MZ is an 8-bit AVR microcontroller from Microchip Technology's ATmega series, featuring 16KB FLASH memory, 1KB RAM, and 512 bytes EEPROM. This device integrates 32 I/O pins, multiple communication interfaces (I2C, SPI, UART/USART), and operates at 16MHz with an internal oscillator. The part is qualified to AEC-Q100 automotive standards and complies with ROHS3 and REACH requirements.

The ATMEGA164P-15MZ carries an Obsolete product status. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring this microcontroller's specific feature set and performance characteristics.

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
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
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package	44-VQFN (7x7)
Grade	Automotive
Qualification	AEC-Q100
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the ATMEGA164P-15MZ is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must maintain identical specifications for core processor architecture, memory configuration, I/O count, voltage supply range, operating temperature range, package type, and automotive qualification status.

The ATMEGA164P-B15MZ qualifies as a parametric equivalent based on the following criteria:

Identical AVR core processor and 8-bit architecture
Matching 16MHz clock speed and 16KB FLASH memory capacity
Equivalent 1KB RAM and 512-byte EEPROM configuration
Same 32 I/O pin count and connectivity interfaces (I2C, SPI, UART/USART)
Identical peripheral feature set (Brown-out Detect/Reset, POR, PWM, WDT)
Matching 2.7V to 5.5V supply voltage range
Equivalent -40°C to 125°C operating temperature range
Identical 44-VQFN (7x7) surface mount package
Matching automotive grade and AEC-Q100 qualification
Equivalent ROHS3 compliance and MSL rating

Parameter Comparison

Parameter	ATMEGA164P-15MZ	ATMEGA164P-B15MZ
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
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
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package	44-VQFN (7x7)	44-VQFN (7x7)
Grade	Automotive	Automotive
Qualification	AEC-Q100	AEC-Q100
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active

Engineering Selection Recommendations

The ATMEGA164P-B15MZ serves as the direct parametric equivalent for the obsolete ATMEGA164P-15MZ. Both parts maintain identical electrical specifications, memory architecture, I/O configuration, and automotive qualification status. The primary distinction is product lifecycle status: the ATMEGA164P-15MZ is obsolete, while the ATMEGA164P-B15MZ maintains active production status.

For applications currently using the ATMEGA164P-15MZ, the ATMEGA164P-B15MZ provides full functional and pin compatibility without design modification. Both parts comply with ROHS3 and REACH requirements, carry AEC-Q100 automotive qualification, and operate across the identical -40°C to 125°C temperature range. The active production status of the ATMEGA164P-B15MZ ensures long-term supply chain availability and support.

Frequently Asked Questions (FAQ)

Q: Are the ATMEGA164P-15MZ and ATMEGA164P-B15MZ pin-compatible?

A: Yes. Both parts use the identical 44-VQFN (7x7) surface mount package with 32 I/O pins in the same configuration. No PCB layout modifications are required for substitution.

Q: Can the ATMEGA164P-B15MZ replace the ATMEGA164P-15MZ in existing designs?

A: Yes. The ATMEGA164P-B15MZ is a parametric equivalent with identical core processor, memory capacity, clock speed, voltage supply range, operating temperature range, and peripheral feature set. Direct substitution is supported without firmware or hardware changes.

Q: What is the difference between these two part numbers?

A: The ATMEGA164P-15MZ is obsolete, while the ATMEGA164P-B15MZ is in active production. All electrical and mechanical specifications are identical. The suffix variation reflects manufacturing or qualification batch designation.

Q: Are both parts automotive-qualified?

A: Yes. Both the ATMEGA164P-15MZ and ATMEGA164P-B15MZ carry automotive grade classification and AEC-Q100 qualification, meeting automotive industry reliability and quality standards.

Q: What is the MSL rating for these microcontrollers?

A: Both parts carry MSL rating 3 with a 168-hour floor life. Standard moisture control procedures during storage and handling apply.

Q: Do both parts support the same communication interfaces?

A: Yes. Both parts integrate I2C, SPI, and UART/USART interfaces with identical peripheral support including Brown-out Detect/Reset, Power-On Reset (POR), PWM, and Watchdog Timer (WDT).

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