AT24C01A-10PI-2.7 Equivalent & Substitute Parts

Part Overview

The AT24C01A-10PI-2.7 is a 1Kbit EEPROM memory IC with I2C interface operating at 400 kHz, manufactured by Microchip Technology. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part is housed in an 8-DIP package suitable for through-hole mounting applications requiring non-volatile memory storage with I2C serial communication.

Substiute Parts

AT24C01A-10PI-2.7

Microchip TechnologyIn Stock: 3225AT24C01A-10PI-2.7 Datasheet

Current PartRFQ

24AA014H-I/P

Microchip TechnologyIn Stock: 233124AA014H-I/P Datasheet

DirectRFQ

24LC01B-I/P

Microchip TechnologyIn Stock: 1031124LC01B-I/P Datasheet

MFR RecommendedRFQ

24LC01B/P

Microchip TechnologyIn Stock: 400224LC01B/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT24C01A-10PI-2.7 is determined by the following critical parameters: memory size (1Kbit), memory organization (128 x 8), I2C interface protocol, 400 kHz clock frequency, 5ms write cycle time, 8-DIP package configuration, and through-hole mounting. All substitute parts listed maintain these core electrical and mechanical specifications. Voltage supply range and operating temperature range variations are permitted within the constraints of the application circuit design. Access time differences do not affect functional compatibility at the specified 400 kHz clock frequency.

Parameter Comparison

Engineering Selection Recommendations

24AA014H-I/P is a direct functional equivalent with active product status and ROHS3 compliance. This part extends the lower voltage supply limit to 1.7V, providing broader operational flexibility. Access time matches the original specification at 900 ns. Selection of this part is appropriate for applications requiring extended low-voltage operation.

24LC01B-I/P is the manufacturer-recommended substitute with verified programmability status and ROHS3 compliance. This part maintains the voltage supply range of 2.5V ~ 5.5V and full operating temperature range of -40°C ~ 85°C. Access time is specified at 4.6 µs, which remains compatible with 400 kHz I2C operation. This part carries the highest inventory availability.

24LC01B/P is an alternative manufacturer-recommended substitute with verified programmability and ROHS3 compliance. This part operates within a reduced temperature range of 0°C ~ 70°C. Selection of this part requires verification that the application does not require operation below 0°C or above 70°C. Access time specification is 4.6 µs.

All substitute parts maintain electrical and mechanical compatibility with the original AT24C01A-10PI-2.7 specification for I2C EEPROM applications.

Frequently Asked Questions (FAQ)

Q: Can 24LC01B-I/P directly replace AT24C01A-10PI-2.7 in existing designs? A: Yes. Both parts share identical memory size (1Kbit), organization (128 x 8), I2C interface, 400 kHz clock frequency, 5ms write cycle time, and 8-DIP package. The 24LC01B-I/P is the manufacturer-recommended substitute with active product status and ROHS3 compliance.

Q: What is the difference between 24LC01B-I/P and 24LC01B/P? A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is operating temperature range: 24LC01B-I/P operates from -40°C to 85°C, while 24LC01B/P operates from 0°C to 70°C. Selection depends on application temperature requirements.

Q: Does the 4.6 µs access time of 24LC01B variants affect I2C communication? A: No. The 4.6 µs access time remains compatible with 400 kHz I2C operation. Access time specifications do not limit clock frequency performance at this operating speed.

Q: Why is 24AA014H-I/P listed as a substitute if it has different voltage specifications? A: The 24AA014H-I/P extends the lower voltage supply limit to 1.7V while maintaining all other electrical and mechanical parameters. This part is suitable for applications requiring extended low-voltage operation while maintaining full compatibility with standard 2.7V ~ 5.5V designs.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts (24AA014H-I/P, 24LC01B-I/P, 24LC01B/P) are ROHS3 compliant. The original AT24C01A-10PI-2.7 is RoHS non-compliant.

Q: Can these parts be used interchangeably in PCB designs? A: Yes. All parts use identical 8-DIP package dimensions (0.300", 7.62mm) and through-hole mounting configuration, allowing direct PCB footprint compatibility without layout modifications.