AT24C32-10PI EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT24C32-10PI is a 32Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 400 kHz with 8-PDIP through-hole packaging. This component is classified as obsolete product status, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations. The part operates across industrial temperature ranges (-40°C to 85°C) and requires supply voltage between 4.5V and 5.5V.

Key Parameters

Parameter	Value
Memory Size	32Kbit
Memory Organization	4K x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	10 ms
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitute parts for the AT24C32-10PI are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Memory capacity: 32Kbit
Memory organization: 4K x 8 configuration
Interface protocol: I2C
Clock frequency: 400 kHz minimum
Package form factor: 8-DIP through-hole
Operating temperature range: -40°C to 85°C minimum

Allowable Parameter Variations:

Supply voltage range may be broader (lower minimum acceptable if upper limit meets or exceeds 5.5V)
Write cycle time may be faster (lower values acceptable)
Access time specifications must meet or exceed 900 ns performance

Substitute parts meeting these criteria maintain functional compatibility in applications designed for the AT24C32-10PI while accommodating component availability and lifecycle management.

Parameter Comparison

Parameter	AT24C32-10PI	24AA32AF-I/P	BR24L32-W
Manufacturer	Microchip Technology	Microchip Technology	Rohm Semiconductor
Memory Size	32Kbit	32Kbit	32Kbit
Memory Organization	4K x 8	4K x 8	4K x 8
Memory Interface	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	400 kHz
Access Time	900 ns	900 ns	Not specified
Write Cycle Time	10 ms	5 ms	5 ms
Voltage Supply Range	4.5V ~ 5.5V	1.7V ~ 5.5V	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

24AA32AF-I/P (Microchip Technology): This part maintains manufacturer continuity as a Microchip Technology product with active product status. It provides identical memory capacity, organization, and I2C interface specifications. The extended supply voltage range (1.7V to 5.5V) accommodates the original 4.5V to 5.5V requirement. Faster write cycle time (5 ms versus 10 ms) represents improved performance. ROHS3 compliance addresses regulatory requirements absent in the obsolete AT24C32-10PI. Packaging and mounting specifications are identical.

BR24L32-W (Rohm Semiconductor): This alternative from Rohm Semiconductor provides equivalent 32Kbit capacity with matching I2C 400 kHz interface and 8-DIP through-hole package. Extended supply voltage range (1.8V to 5.5V) encompasses original specifications. Write cycle time improvement (5 ms) and ROHS3 compliance are present. This option provides cross-manufacturer substitution capability while maintaining functional compatibility.

Both substitute parts satisfy the electrical and mechanical requirements for direct replacement in applications originally designed for the AT24C32-10PI.

Frequently Asked Questions (FAQ)

Q: Can the 24AA32AF-I/P directly replace the AT24C32-10PI in existing designs?

A: Yes. Both parts share identical memory capacity (32Kbit), organization (4K x 8), I2C interface, 400 kHz clock frequency, and 8-DIP through-hole package. The 24AA32AF-I/P operates across the original supply voltage range and maintains the required operating temperature specification (-40°C to 85°C).

Q: What is the significance of the extended voltage range in substitute parts?

A: The 24AA32AF-I/P (1.7V to 5.5V) and BR24L32-W (1.8V to 5.5V) feature broader minimum voltage specifications compared to the AT24C32-10PI (4.5V to 5.5V). This extended range provides design flexibility for low-power applications while maintaining full compatibility with the original 4.5V to 5.5V operating window.

Q: Are there package or pinout differences between these parts?

A: No. All three parts use identical 8-DIP (0.300", 7.62mm) through-hole packaging with matching pinout configuration, enabling direct socket replacement without PCB modification.

Q: What compliance advantages do the substitute parts offer?

A: Both 24AA32AF-I/P and BR24L32-W carry ROHS3 compliance certification, addressing regulatory requirements for new designs and manufacturing environments. The AT24C32-10PI is classified as RoHS non-compliant.

Q: How do write cycle times affect system performance?

A: The AT24C32-10PI specifies 10 ms write cycle time, while both substitute parts (24AA32AF-I/P and BR24L32-W) complete write operations in 5 ms. Faster write cycles reduce overall system latency during memory programming operations but do not affect read performance or I2C communication speed.

Q: Is the BR24L32-W suitable for applications requiring Microchip-only component specifications?

A: No. The BR24L32-W is manufactured by Rohm Semiconductor. Applications with manufacturer-specific requirements must use the 24AA32AF-I/P to maintain Microchip Technology sourcing.

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