24AA16-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24AA16-E/ST is a 16Kbit I2C EEPROM memory IC manufactured by Microchip Technology, packaged in 8-TSSOP surface mount configuration. This non-volatile memory device operates across a wide voltage range (1.7V to 5.5V) and temperature range (-40°C to 125°C), making it suitable for embedded systems, data logging, and configuration storage applications. The device is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching core electrical and mechanical parameters: 16Kbit memory capacity, 2K x 8 organization, I2C interface protocol, 8-TSSOP package, and compatible voltage supply specifications.

Key Parameters

Parameter	Value
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	I2C
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Voltage Supply Range	1.7V ~ 5.5V
Operating Temperature Range	-40°C ~ 125°C
Memory Type	Non-Volatile EEPROM
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24AA16-E/ST is determined by the following mandatory parameters:

Memory Capacity & Organization: Must be 16Kbit with 2K x 8 organization
Interface Protocol: Must support I2C communication
Package Configuration: Must be 8-TSSOP surface mount package with matching 0.173" width (4.40mm)
Voltage Compatibility: Supply voltage range must encompass or be compatible with 1.7V ~ 5.5V
Memory Type: Must be non-volatile EEPROM technology
Compliance: Must maintain ROHS3 compliance status

Two substitute parts meet these criteria and are listed below with their specific electrical characteristics.

Parameter Comparison

Parameter	24AA16-E/ST (Microchip)	M24C16-DRDW8TP/K (STMicroelectronics)	R1EX24016ATAS0I#S0 (Renesas)
Memory Size	16Kbit	16Kbit	16Kbit
Memory Organization	2K x 8	2K x 8	2K x 8
Memory Interface	I2C	I2C	I2C
Clock Frequency	400 kHz	1 MHz	400 kHz
Access Time	900 ns	450 ns	900 ns
Write Cycle Time	5ms	4ms	5ms
Voltage Supply Range	1.7V ~ 5.5V	1.7V ~ 5.5V	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 85°C
Package Type	8-TSSOP	8-TSSOP	8-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

M24C16-DRDW8TP/K (STMicroelectronics): This substitute offers enhanced performance characteristics with 1 MHz clock frequency and 450 ns access time, representing a performance upgrade over the 24AA16-E/ST. The device maintains full voltage compatibility (1.7V ~ 5.5V) and ROHS3 compliance. Operating temperature range is -40°C to 105°C. This part carries AEC-Q100 automotive qualification, indicating suitability for automotive and industrial applications requiring higher reliability standards.

R1EX24016ATAS0I#S0 (Renesas Electronics): This substitute provides electrical equivalence with matching 400 kHz clock frequency and 900 ns access time specifications. Voltage supply range is 1.8V ~ 5.5V, which is compatible with the original part's 1.7V minimum specification for applications operating at 1.8V or above. Operating temperature range is -40°C to 85°C. The device maintains ROHS3 compliance and is supplied in Tape & Reel packaging.

Selection between substitutes depends on application-specific requirements: choose M24C16-DRDW8TP/K for performance-critical or automotive applications; choose R1EX24016ATAS0I#S0 for cost-optimized designs with operating temperatures not exceeding 85°C and minimum supply voltage of 1.8V or higher.

Frequently Asked Questions (FAQ)

Q: Can M24C16-DRDW8TP/K be used as a direct replacement for 24AA16-E/ST?

A: Yes. Both devices share identical memory capacity (16Kbit), organization (2K x 8), I2C interface, 8-TSSOP package, and voltage supply range (1.7V ~ 5.5V). The M24C16-DRDW8TP/K offers faster clock frequency (1 MHz vs 400 kHz) and access time (450 ns vs 900 ns), making it functionally compatible and performance-superior. Temperature range differs: M24C16-DRDW8TP/K operates to 105°C versus 125°C for the original part.

Q: What are the limitations of R1EX24016ATAS0I#S0 as a substitute?

A: The R1EX24016ATAS0I#S0 has two parameter constraints: minimum supply voltage is 1.8V (versus 1.7V for the original), and maximum operating temperature is 85°C (versus 125°C). These limitations apply only to applications requiring operation below 1.8V or above 85°C. For standard industrial applications within these ranges, the device is fully compatible.

Q: Are all three parts pin-compatible?

A: Yes. All three devices use the 8-TSSOP package with identical 0.173" width (4.40mm) and surface mount configuration. Pin assignments for I2C EEPROM devices in this package class are standardized, ensuring direct PCB compatibility without layout modifications.

Q: What compliance certifications apply to these substitutes?

A: All three parts maintain ROHS3 compliance and carry unlimited moisture sensitivity rating (MSL 1). The M24C16-DRDW8TP/K additionally holds AEC-Q100 automotive qualification. All parts are classified as REACH Unaffected and carry EAR99 export classification.

Q: How do clock frequency differences affect system integration?

A: The M24C16-DRDW8TP/K operates at 1 MHz I2C clock frequency, while both the 24AA16-E/ST and R1EX24016ATAS0I#S0 operate at 400 kHz. I2C bus speed is determined by the slowest device on the bus. If the M24C16-DRDW8TP/K is used in a system with other 400 kHz I2C devices, the bus will operate at 400 kHz. The faster device will function correctly at reduced clock speed.

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