AT24C01D-XHM-T Equivalent & Substitute Parts

Part Overview

The AT24C01D-XHM-T is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz clock frequency. This device is housed in an 8-TSSOP package and operates across a supply voltage range of 1.7V to 3.6V with an access time of 4.5 µs. The part maintains Active product status and is RoHS3 compliant. Substitute parts are identified to address inventory availability, packaging preferences, or specific operational parameter requirements while maintaining functional equivalence in 1Kbit I2C EEPROM applications.

Key Parameters

Parameter	Value
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	4.5 µs
Write Cycle Time	5ms
Voltage Supply Range	1.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	8-TSSOP
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following core parameters: memory size (1Kbit), memory organization (128 x 8), I2C interface protocol, write cycle time (5ms), and surface mount packaging. Parts are grouped into three categories based on operational characteristics:

Category 1: Direct Microchip Technology Substitutes (Same Manufacturer, Enhanced or Compatible Specifications)

AT24CS01-XHM-T: Identical memory specifications with extended voltage range (1.7V ~ 5.5V) and improved access time (550 ns vs 4.5 µs)
24LC014-I/MS, 24LC014H-I/MS, 24LC014T-I/MS, 24LC014T-I/ST: 1Kbit I2C EEPROM devices with 400 kHz or 1 MHz operation, extended voltage range (2.5V ~ 5.5V), and alternative packaging formats
24VL014/MS, 24VL014/ST, 24VL014H/ST: Low-voltage variants (1.5V ~ 3.6V) with 400 kHz operation and reduced temperature range (-20°C ~ 85°C)

Category 2: Alternative Manufacturer Substitutes (Rohm Semiconductor)

BR24G01FVM-3AGTTR: 1Kbit I2C EEPROM with 1 MHz operation, extended voltage range (1.6V ~ 5.5V), and 8-MSOP packaging
BR24G01FVJ-3GTE2: 1Kbit I2C EEPROM with 400 kHz operation and 8-TSSOP packaging; marked as Not For New Designs

All substitute parts maintain 1Kbit capacity, 128 x 8 organization, I2C interface, 5ms write cycle time, and surface mount technology. Voltage supply range, clock frequency, access time, and package format vary among substitutes to accommodate different application requirements.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Product Status
AT24C01D-XHM-T	Microchip	1Kbit	1 MHz	4.5 µs	1.7V ~ 3.6V	-40°C ~ 85°C	8-TSSOP	Active
AT24CS01-XHM-T	Microchip	1Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24LC014-I/MS	Microchip	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24LC014H-I/MS	Microchip	1Kbit	1 MHz	400 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24LC014T-I/MS	Microchip	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
24LC014T-I/ST	Microchip	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24VL014/MS	Microchip	1Kbit	400 kHz	900 ns	1.5V ~ 3.6V	-20°C ~ 85°C	8-MSOP	Active
24VL014/ST	Microchip	1Kbit	400 kHz	900 ns	1.5V ~ 3.6V	-20°C ~ 85°C	8-TSSOP	Active
24VL014H/ST	Microchip	1Kbit	400 kHz	900 ns	1.5V ~ 3.6V	-20°C ~ 85°C	8-TSSOP	Active
BR24G01FVM-3AGTTR	Rohm	1Kbit	1 MHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
BR24G01FVJ-3GTE2	Rohm	1Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Not For New Designs

Engineering Selection Recommendations

For Direct Replacement with Enhanced Performance: AT24CS01-XHM-T is the primary substitute when maintaining identical 8-TSSOP packaging is required. This part offers superior access time (550 ns) and extended voltage range (1.7V ~ 5.5V) while preserving 1 MHz operation and Active product status.

For Extended Voltage Range Applications: 24LC014H-I/MS or 24LC014T-I/MS support extended voltage operation (2.5V ~ 5.5V) with 1 MHz or 400 kHz clock frequencies respectively. Both maintain Active status and RoHS3 compliance. Package format is 8-MSOP.

For Low-Voltage Applications: 24VL014/ST or 24VL014H/ST are suitable for systems operating at 1.5V ~ 3.6V. These parts maintain 8-TSSOP packaging and Active product status, though operating temperature range is reduced to -20°C ~ 85°C.

For Alternative Manufacturer Requirement: BR24G01FVM-3AGTTR (Rohm Semiconductor) provides 1 MHz operation with extended voltage range (1.6V ~ 5.5V) and Active product status. Package format is 8-MSOP. BR24G01FVJ-3GTE2 is not recommended for new designs.

Compliance and Certification: All recommended substitutes maintain RoHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification. Moisture Sensitivity Level is 1 (Unlimited) for all parts except 24LC014H-I/MS (MSL 2, 1 Year).

Frequently Asked Questions (FAQ)

Q: Can AT24CS01-XHM-T replace AT24C01D-XHM-T in all applications? A: AT24CS01-XHM-T is functionally compatible as a direct substitute. It maintains identical memory capacity, I2C interface, 1 MHz operation, and 8-TSSOP packaging. The extended voltage range (1.7V ~ 5.5V vs 1.7V ~ 3.6V) and improved access time (550 ns vs 4.5 µs) make it suitable for applications requiring broader supply voltage tolerance or faster access performance.

Q: What is the difference between 24LC014 and 24VL014 series? A: The 24LC014 series operates at 2.5V ~ 5.5V supply voltage with full temperature range (-40°C ~ 85°C). The 24VL014 series is optimized for low-voltage applications (1.5V ~ 3.6V) with reduced temperature range (-20°C ~ 85°C). Both maintain 1Kbit capacity and I2C interface. Selection depends on system voltage requirements and operating temperature specifications.

Q: Are 8-TSSOP and 8-MSOP packages interchangeable? A: 8-TSSOP and 8-MSOP packages have different physical dimensions and pin layouts. 8-TSSOP measures 0.173" width (4.40mm), while 8-MSOP measures 0.118" width (3.00mm). PCB footprints are not interchangeable. Select the package format matching your circuit board design requirements.

Q: Why is BR24G01FVJ-3GTE2 marked as "Not For New Designs"? A: Parts marked "Not For New Designs" indicate the manufacturer is phasing out the product line. While functional equivalence is maintained, Microchip Technology or Rohm alternatives with Active status are recommended for new circuit designs to ensure long-term availability and support.

Q: What clock frequency should I select for my application? A: The AT24C01D-XHM-T operates at 1 MHz. Substitute parts offer both 1 MHz (24LC014H, BR24G01FVM) and 400 kHz (24LC014, 24VL014) options. Selection depends on I2C bus speed requirements. 1 MHz operation supports faster data transfer rates; 400 kHz is standard for legacy systems. Both maintain 5ms write cycle time.

Q: Are all substitute parts RoHS3 compliant? A: All substitute parts listed maintain RoHS3 compliance and REACH Unaffected status, consistent with the AT24C01D-XHM-T. Moisture Sensitivity Level is 1 (Unlimited) for most parts, except 24LC014H-I/MS which specifies MSL 2 (1 Year).

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