AT24C08AN-10SC-2.7 Equivalent & Substitute Parts

Part Overview

The AT24C08AN-10SC-2.7 is an 8Kbit EEPROM memory IC with I2C interface operating at 400 kHz, manufactured by Microchip Technology. This device features a 1K x 8 memory organization with 4.5 µs access time and 5ms write cycle time, housed in an 8-SOIC package. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Memory Size	8Kbit
Memory Format	EEPROM
Memory Organization	1K x 8
Interface	I2C
Clock Frequency	400 kHz
Write Cycle Time	5ms
Access Time	4.5 µs
Supply Voltage Range	2.7V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package	8-SOIC (0.154", 3.90mm Width)
RoHS Status	Non-compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Memory capacity (8Kbit) and organization (1K x 8)
I2C interface with 400 kHz clock frequency
Write cycle time (5ms)
Package type (8-SOIC with 0.154" width, 3.90mm)
Supply voltage compatibility (minimum 2.7V requirement)
Operating temperature range (minimum 0°C lower bound)

Substitute parts must maintain these core specifications. Variations in access time, voltage range expansion, temperature range extension, and RoHS compliance status are acceptable provided the primary functional parameters remain constant. Package width variations (8-SOP at 0.173", 4.40mm) represent minor mechanical differences compatible with standard PCB layouts.

Parameter Comparison

Parameter	AT24C08AN-10SC-2.7	24LC08B-I/SN	CAT24C08WI-G	BR24L08F-WE2	BR24L08FJ-WE2	BR24T08FJ-WE2	M24C08-RMN6TP	M24C08-WMN6TP
Memory Size	8Kbit	8Kbit	8Kbit	8Kbit	8Kbit	8Kbit	8Kbit	8Kbit
Memory Organization	1K x 8	256 x 8 x 4	1K x 8	1K x 8	1K x 8	1K x 8	1K x 8	1K x 8
Interface	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz	400 kHz
Write Cycle Time	5ms	5ms	5ms	5ms	5ms	5ms	5ms	5ms
Access Time	4.5 µs	900 ns	900 ns	Not specified	Not specified	Not specified	900 ns	900 ns
Supply Voltage	2.7V ~ 5.5V	2.5V ~ 5.5V	1.7V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V	1.6V ~ 5.5V	1.8V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOP (0.173", 4.40mm)	8-SOP-J (0.154", 3.90mm)	8-SOP-J (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Not For New Designs
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For replacement of the obsolete AT24C08AN-10SC-2.7, the following selection criteria apply:

Primary Recommendation: M24C08-RMN6TP (STMicroelectronics) offers full functional equivalence with identical package dimensions (8-SOIC, 0.154", 3.90mm), ROHS3 compliance, active product status, and verified programmability. Supply voltage range (1.8V ~ 5.5V) encompasses the original specification. This part maintains the highest inventory availability (105,200 pcs) and is actively supported for new designs.

Alternative Selection: 24LC08B-I/SN (Microchip Technology) provides manufacturer continuity with identical package geometry, ROHS3 compliance, and active status. The expanded operating temperature range (-40°C ~ 85°C) and improved access time (900 ns) represent performance enhancements. Verified programmability status supports production integration.

Package-Compatible Alternatives: BR24L08FJ-WE2 and BR24T08FJ-WE2 (Rohm Semiconductor) maintain the 8-SOP-J package with 0.154" width matching the original footprint. Both feature ROHS3 compliance and active product status. BR24L08FJ-WE2 carries verified programmability designation.

Voltage-Constrained Applications: CAT24C08WI-G (Catalyst Semiconductor) supports the lowest supply voltage (1.7V minimum) with ROHS3 compliance and active status. Moisture sensitivity level MSL-3 (168 hours) requires controlled storage conditions compared to MSL-1 alternatives.

Legacy Production Support: M24C08-WMN6TP (STMicroelectronics) maintains compatibility with existing designs but carries "Not For New Designs" status. This part remains suitable for sustaining production of established products.

Frequently Asked Questions (FAQ)

Q: Can I directly replace AT24C08AN-10SC-2.7 with any of the listed substitutes?

A: Direct replacement is possible for parts maintaining identical package dimensions (8-SOIC, 0.154", 3.90mm width). M24C08-RMN6TP, 24LC08B-I/SN, M24C08-WMN6TP, and CAT24C08WI-G are pin-compatible. BR24L08F-WE2 uses 8-SOP packaging with 0.173" width, requiring PCB layout verification. BR24L08FJ-WE2 and BR24T08FJ-WE2 use 8-SOP-J packaging with matching 0.154" width.

Q: What is the significance of the memory organization difference (1K x 8 vs. 256 x 8 x 4)?

A: Both organizations deliver 8Kbit total capacity with identical I2C interface operation. The 256 x 8 x 4 configuration in 24LC08B-I/SN represents internal architecture variation without affecting functional compatibility or address mapping for standard I2C EEPROM applications.

Q: Why do substitute parts have wider operating temperature ranges?

A: The original AT24C08AN-10SC-2.7 specifies 0°C ~ 70°C (industrial grade). Substitute parts typically offer -40°C ~ 85°C (extended industrial/automotive grade) as standard specifications. This represents manufacturing capability expansion and does not require design modification. Applications limited to 0°C ~ 70°C operation remain fully compatible.

Q: Is RoHS compliance mandatory for substitution?

A: The original part is RoHS non-compliant. All listed substitutes are ROHS3 compliant, reflecting current manufacturing standards. For applications subject to RoHS regulations, compliant substitutes are required. For legacy systems without RoHS requirements, compliance status does not affect functional compatibility.

Q: What does "Not For New Designs" status mean for M24C08-WMN6TP?

A: This designation indicates the manufacturer supports existing production but does not recommend this part for new product development. M24C08-RMN6TP represents the active equivalent from the same manufacturer. For sustaining production of established designs, M24C08-WMN6TP remains functionally suitable.

Q: How does access time variation (4.5 µs vs. 900 ns) affect compatibility?

A: Access time represents the delay from address presentation to data availability. Faster access times (900 ns) in substitute parts provide performance improvement without compatibility issues. Applications designed for 4.5 µs access time operate correctly with faster alternatives. No design modification is required.

Q: What is the impact of supply voltage range differences?

A: The original part requires minimum 2.7V. Substitute parts with lower minimums (1.8V, 1.7V, 1.6V) are backward compatible with 2.7V systems. Applications operating at 2.7V ~ 5.5V function identically with any substitute maintaining this range. Lower voltage minimums provide additional design flexibility without affecting existing implementations.

Q: Does MSL (Moisture Sensitivity Level) affect component selection?

A: CAT24C08WI-G specifies MSL-3 (168-hour floor life) compared to MSL-1 (unlimited) for other substitutes. MSL-3 components require controlled storage and handling procedures. For high-volume production with standard moisture control, MSL-1 alternatives are preferred. MSL-3 components remain functionally equivalent but impose additional logistics requirements.

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