Equivalent & Substitute Parts for 24LC014-E/ST

Part Overview

The 24LC014-E/ST is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 8-TSSOP surface mount packaging. This non-volatile memory device operates across a wide voltage range of 2.5V to 5.5V and temperature range of -40°C to 125°C, making it suitable for industrial and consumer applications requiring persistent data storage.

The part is currently in active production status. Equivalent and substitute parts are identified based on matching core electrical and mechanical parameters: 1Kbit memory capacity, 128 x 8 memory organization, I2C interface protocol, 8-pin surface mount packaging, and compatible voltage/temperature operating ranges.

Key Parameters

Parameter	24LC014-E/ST
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24LC014-E/ST are grouped based on the following substitution criteria:

Core Electrical Parameters (Must Match):

Memory capacity: 1Kbit
Memory organization: 128 x 8
Interface protocol: I2C
Write cycle time: 5ms

Compatible Voltage Ranges: Parts with supply voltage ranges that encompass or overlap with 2.5V ~ 5.5V are considered compatible. Parts with narrower ranges (1.7V ~ 3.6V or 1.8V ~ 5.5V) remain functional in standard 3.3V and 5V applications.

Temperature Operating Range: The original part operates to 125°C. Substitute parts operating to 85°C are suitable for most industrial applications but may have reduced high-temperature capability.

Clock Frequency Variations: The original part operates at 400 kHz. Substitute parts with 1 MHz clock frequency provide enhanced performance while maintaining backward compatibility in I2C bus applications.

Package Compatibility: Primary substitutes use 8-TSSOP packaging (0.173", 4.40mm Width). Secondary substitutes use 8-MSOP (0.110", 2.80mm Width) or 8-LSSOP packaging, which require PCB layout modifications but maintain electrical compatibility.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temperature	Package	Product Status
24LC014-E/ST	Microchip Technology	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active
AT24C01D-XHM-B	Microchip Technology	1Kbit	1 MHz	4.5 µs	1.7V ~ 3.6V	-40°C ~ 85°C	8-TSSOP	Active
AT24C01D-XHM-T	Microchip Technology	1Kbit	1 MHz	4.5 µs	1.7V ~ 3.6V	-40°C ~ 85°C	8-TSSOP	Active
BR24G01FVJ-3GTE2	Rohm Semiconductor	1Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-BJ	Not For New Designs
BR24G01FVM-3AGTTR	Rohm Semiconductor	1Kbit	1 MHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
BR24G01FVT-3GE2	Rohm Semiconductor	1Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
BR24L01AFV-WE2	Rohm Semiconductor	1Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-LSSOP	Not For New Designs
BR24L01AFVM-WTR	Rohm Semiconductor	1Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
BR24L01AFVT-WE2	ROHM Semiconductor	1Kbit	400 kHz	Not specified	1.8V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active
BR24T01FVM-WTR	Rohm Semiconductor	1Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-MSOP	Active
BR24T01FVT-WE2	Rohm Semiconductor	1Kbit	400 kHz	Not specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP-B	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

AT24C01D-XHM-T and AT24C01D-XHM-B are Microchip Technology parts with active product status. Both feature enhanced 1 MHz clock frequency and maintain I2C protocol compatibility. These parts are suitable for applications where higher data transfer rates are beneficial. Note that the voltage range is narrower (1.7V ~ 3.6V), limiting use to 3.3V systems. Both parts are ROHS3 compliant and REACH unaffected.

Secondary Substitutes (Active Status, Alternative Packaging):

BR24G01FVM-3AGTTR, BR24L01AFVM-WTR, and BR24T01FVM-WTR are Rohm Semiconductor parts in active production with 8-MSOP packaging. These require PCB layout modifications due to different package dimensions (0.110", 2.80mm Width versus 0.173", 4.40mm Width). BR24L01AFVM-WTR and BR24T01FVM-WTR maintain 400 kHz clock frequency matching the original part. All three support voltage ranges encompassing 5V operation (1.6V ~ 5.5V or 1.8V ~ 5.5V).

Tertiary Substitutes (Active Status, 8-TSSOP Packaging):

BR24G01FVT-3GE2, BR24L01AFVT-WE2, and BR24T01FVT-WE2 maintain 8-TSSOP packaging compatibility with the original part. All operate at 400 kHz clock frequency. BR24L01AFVT-WE2 and BR24T01FVT-WE2 are in active production status. These parts support voltage ranges of 1.6V ~ 5.5V or 1.8V ~ 5.5V.

Not Recommended for New Designs:

BR24G01FVJ-3GTE2 and BR24L01AFV-WE2 carry "Not For New Designs" status and should be avoided in new product development.

Frequently Asked Questions (FAQ)

Q: Can I substitute AT24C01D-XHM-T for 24LC014-E/ST in a 5V application?

A: No. The AT24C01D-XHM-T operates within 1.7V ~ 3.6V voltage range and is not rated for 5V operation. Use this part only in 3.3V systems. For 5V applications, select BR24G01FVT-3GE2, BR24L01AFVT-WE2, or BR24T01FVT-WE2, which support 1.6V ~ 5.5V or 1.8V ~ 5.5V ranges.

Q: What is the difference between 8-TSSOP and 8-MSOP packaging?

A: 8-TSSOP measures 0.173" (4.40mm) in width, while 8-MSOP measures 0.110" (2.80mm) in width. Both are surface mount packages with 8 pins, but they require different PCB footprints. Substituting between these packages requires PCB layout modification.

Q: Does the higher 1 MHz clock frequency of AT24C01D parts affect compatibility?

A: No. The 1 MHz clock frequency is backward compatible with I2C bus systems designed for 400 kHz operation. The I2C protocol allows devices to operate at lower speeds than their maximum rated frequency. The AT24C01D parts will function correctly in 400 kHz I2C systems.

Q: Why does the original 24LC014-E/ST operate to 125°C while most substitutes operate to 85°C?

A: The 24LC014-E/ST is specified for extended industrial temperature range (-40°C ~ 125°C). Most substitute parts are specified for standard industrial range (-40°C ~ 85°C). For applications requiring 125°C operation, the 24LC014-E/ST remains the appropriate choice.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance and REACH unaffected status, matching the environmental compliance of the original 24LC014-E/ST.

Q: Can I use BR24L01AFVM-WTR as a direct replacement without PCB changes?

A: No. BR24L01AFVM-WTR uses 8-MSOP packaging (0.110", 2.80mm Width) versus the original 8-TSSOP packaging (0.173", 4.40mm Width). PCB footprint modification is required. For direct PCB compatibility without layout changes, use BR24G01FVT-3GE2, BR24L01AFVT-WE2, or BR24T01FVT-WE2, which maintain 8-TSSOP packaging.

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