AT24C32N-10SC EEPROM 32Kbit I2C Equivalent & Substitute Parts

Part Overview

The AT24C32N-10SC is a 32Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 8-SOIC packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain functional compatibility across memory capacity, interface protocol, and electrical operating parameters.

Key Parameters

Parameter	AT24C32N-10SC
Memory Size	32Kbit
Memory Organization	4K x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Write Cycle Time	10ms
Access Time	900 ns
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Memory Size: 32Kbit (4K x 8 organization)
Memory Interface: I2C protocol
Package / Case: 8-SOIC form factor with 0.154" (3.90mm) width
Mounting Type: Surface Mount

Substitute parts must support these core parameters. Additional electrical parameters including voltage supply range, clock frequency, write cycle time, and operating temperature may vary within acceptable limits for the application. Parts with extended voltage ranges (lower minimum voltage) and wider operating temperature ranges provide enhanced flexibility. Clock frequency and access time improvements are acceptable enhancements that do not compromise backward compatibility.

Parameter Comparison

Parameter	AT24C32N-10SC	BR24G32F-3GTE2	BR24G32FJ-3AGTE2	BR24G32FJ-3GTE2	BR24L32FJ-WE2	BR24S32FJ-WE2	BR24T32FJ-WE2	CAT24C32WI-GT3	M24C32-DFMN6TP	M24C32-DRMN3TP/K	M24C32-RMN6P
Memory Size	32Kbit	32Kbit	32Kbit	32Kbit	32Kbit	32Kbit	32Kbit	32Kbit	32Kbit	32Kbit	32Kbit
Memory Organization	4K x 8	4K x 8	4K x 8	4K x 8	4K x 8	4K x 8	4K x 8	4K x 8	4K x 8	4K x 8	4K x 8
Memory Interface	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	1 MHz	400 kHz	400 kHz	400 kHz	400 kHz	1 MHz	1 MHz	1 MHz	1 MHz
Write Cycle Time	10ms	5ms	5ms	5ms	5ms	5ms	5ms	5ms	5ms	4ms	5ms
Access Time	900 ns	—	—	—	—	—	—	400 ns	450 ns	450 ns	450 ns
Voltage Supply Range	4.5V ~ 5.5V	1.6V ~ 5.5V	1.7V ~ 5.5V	1.6V ~ 5.5V	1.8V ~ 5.5V	1.7V ~ 5.5V	1.6V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 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	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm)	8-SOIC (0.173", 4.40mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status, ensuring long-term availability and manufacturing support. The following selection criteria apply:

RoHS3 Compliance: All substitute parts are ROHS3 compliant, addressing environmental and regulatory requirements that the original AT24C32N-10SC does not meet. This compliance is mandatory for new designs and production transitions.

Voltage Supply Range: Substitute parts feature extended lower voltage limits (1.6V to 1.8V minimum) compared to the original 4.5V minimum. Designs operating at 4.5V ~ 5.5V remain fully compatible. Extended voltage ranges provide flexibility for low-power applications.

Operating Temperature Range: All substitutes support -40°C ~ 85°C operation, exceeding the original 0°C ~ 70°C range. The M24C32-DRMN3TP/K variant extends to -40°C ~ 125°C with automotive AEC-Q100 qualification for temperature-critical applications.

Package Compatibility: BR24G32F-3GTE2 uses 8-SOIC (0.173", 4.40mm width), which differs from the standard 0.154" width. All other substitutes maintain the 0.154" (3.90mm) width for direct PCB footprint compatibility.

Performance Enhancements: Substitute parts offer improved write cycle times (4ms to 5ms versus 10ms) and faster access times (400ns to 450ns versus 900ns), providing performance benefits without compromising backward compatibility.

Programmability Verification: BR24L32FJ-WE2, BR24S32FJ-WE2, CAT24C32WI-GT3, and M24C32-DFMN6TP are verified as programmable through DiGi-Electronics, confirming production readiness.

Frequently Asked Questions (FAQ)

Q: Can BR24G32F-3GTE2 be used as a direct replacement despite the different package width?

A: BR24G32F-3GTE2 uses 8-SOIC (0.173", 4.40mm width) versus the standard 0.154" width. This dimension difference requires PCB footprint verification. All other substitutes maintain the 0.154" width for direct compatibility.

Q: What is the primary reason to transition from AT24C32N-10SC to an active substitute?

A: The AT24C32N-10SC is classified as obsolete. Active substitute parts ensure continued availability, manufacturing support, and compliance with current environmental regulations (ROHS3). All substitutes maintain the core 32Kbit I2C EEPROM functionality.

Q: Are the faster write cycle times of substitute parts backward compatible?

A: Yes. Substitute parts with 4ms to 5ms write cycle times are faster than the original 10ms specification. Designs written for 10ms cycles operate correctly with faster parts. No firmware or timing adjustments are required.

Q: Which substitute is recommended for automotive applications?

A: M24C32-DRMN3TP/K is qualified to AEC-Q100 automotive standards with extended operating temperature range (-40°C ~ 125°C). This part is suitable for automotive-grade designs.

Q: Do all substitutes support the original 4.5V ~ 5.5V supply voltage?

A: Yes. All substitutes support the full 4.5V ~ 5.5V range. Extended lower voltage limits (1.6V to 1.8V) provide additional flexibility but do not affect 5V operation.

Q: What is the significance of ROHS3 compliance on substitute parts?

A: ROHS3 compliance indicates adherence to current environmental and hazardous substance restrictions. This is required for new designs and production in regulated markets. The original AT24C32N-10SC is non-compliant.

Q: Can I use a 1 MHz clock frequency substitute in a 400 kHz design?

A: Yes. Parts rated for 1 MHz operation (BR24G32FJ-3AGTE2, CAT24C32WI-GT3, M24C32-DFMN6TP, M24C32-DRMN3TP/K, M24C32-RMN6P) operate correctly at 400 kHz. Higher clock frequency ratings indicate enhanced performance capability without affecting lower-speed compatibility.

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