AT24C164-10SC-2.7 Equivalent & Substitute Parts

Part Overview

The AT24C164-10SC-2.7 is a 16Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 900 ns access time. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design requirements and production continuity. The 8-SOIC package and I2C protocol make this device suitable for applications requiring non-volatile memory with serial communication.

Key Parameters

Parameter	Value
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	10ms
Voltage Supply Range	2.7V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package Type	8-SOIC
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters: memory size (16Kbit), memory organization (2K x 8), package type (8-SOIC), and communication interface. The AT24C164-10SC-2.7 operates with I2C protocol at 400 kHz. Substitute parts must maintain compatibility with these core specifications.

The identified substitute parts are grouped as follows:

I2C Interface Substitutes (Direct Protocol Match):

24AA16H-I/SN (Microchip Technology): Maintains I2C 400 kHz interface with identical memory organization and package
R1EX24016ASAS0I#U0 (Renesas Electronics Corporation): I2C 400 kHz interface with compatible memory specifications

Alternative Interface Substitute (SPI Protocol):

M95160-DFMN6TP (STMicroelectronics): SPI interface at 20 MHz; requires protocol conversion in application design

Parameter Comparison

Parameter	AT24C164-10SC-2.7	24AA16H-I/SN	M95160-DFMN6TP	R1EX24016ASAS0I#U0
Manufacturer	Microchip Technology	Microchip Technology	STMicroelectronics	Renesas Electronics
Memory Size	16Kbit	16Kbit	16Kbit	16Kbit
Memory Organization	2K x 8	2K x 8	2K x 8	2K x 8
Memory Interface	I2C	I2C	SPI	I2C
Clock Frequency	400 kHz	400 kHz	20 MHz	400 kHz
Access Time	900 ns	900 ns	Not specified	900 ns
Write Cycle Time	10ms	5ms	5ms	5ms
Voltage Supply Range	2.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.8V ~ 5.5V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-SOIC	8-SOIC	8-SOIC	8-SOP
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct I2C Protocol Replacement: The 24AA16H-I/SN is the primary substitute for the AT24C164-10SC-2.7. Both devices maintain I2C 400 kHz interface compatibility with identical memory organization and 8-SOIC packaging. The 24AA16H-I/SN offers extended operating temperature range (-40°C to 85°C), improved write cycle time (5ms vs. 10ms), and ROHS3 compliance. This part is active in production with 1706 units in stock.

For Extended Temperature Range Applications: The R1EX24016ASAS0I#U0 provides I2C 400 kHz interface with identical memory specifications and extended temperature range. The package designation differs (8-SOP vs. 8-SOIC), requiring PCB layout verification. This part is active with 1179 units in stock and ROHS3 compliant.

For SPI Protocol Applications: The M95160-DFMN6TP operates with SPI interface at 20 MHz and is not a direct protocol substitute. Selection of this part requires application firmware modification to support SPI communication. This part is active with 5890 units in stock and ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can the 24AA16H-I/SN directly replace the AT24C164-10SC-2.7 without PCB modifications?

A: Yes. Both devices use I2C protocol at 400 kHz, identical memory organization (2K x 8), and 8-SOIC packaging. Pin-to-pin compatibility is maintained. No PCB layout changes are required.

Q: What is the difference between the 24AA16H-I/SN and R1EX24016ASAS0I#U0?

A: Both maintain I2C 400 kHz interface and 16Kbit memory. The primary difference is package type: 24AA16H-I/SN uses 8-SOIC while R1EX24016ASAS0I#U0 uses 8-SOP. PCB footprint verification is necessary before selection.

Q: Why is the M95160-DFMN6TP listed as a substitute if it uses SPI instead of I2C?

A: The M95160-DFMN6TP matches memory size, organization, and package dimensions but operates with SPI protocol. This part is suitable only for applications where firmware can be modified to support SPI communication. Direct pin substitution is not possible.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 24AA16H-I/SN, M95160-DFMN6TP, and R1EX24016ASAS0I#U0 are all ROHS3 compliant. The original AT24C164-10SC-2.7 is RoHS non-compliant.

Q: What is the impact of the improved write cycle time in substitute parts?

A: Substitute parts offer 5ms write cycle time compared to 10ms in the original part. This represents a 50% improvement in write performance and does not negatively impact compatibility with existing designs.

Q: Does the extended voltage supply range of substitute parts affect circuit design?

A: No. The substitute parts support lower minimum voltage (1.7V or 1.8V vs. 2.7V), which provides additional design flexibility. Existing circuits designed for 2.7V to 5.5V operation remain fully compatible.

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