Equivalent & Substitute Parts for 24LC01BHT-I/SN

Part Overview

The 24LC01BHT-I/SN is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 400 kHz with 8-SOIC surface mount packaging. This device is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical parameters, memory organization, interface protocol, and package specifications align with the main part, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value
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 ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution relationships are established based on the following criteria:

Electrical Parameter Alignment: Memory size (1Kbit), memory organization (128 x 8), I2C interface protocol, and write cycle time (5ms) must match exactly.

Clock Frequency Compatibility: Parts operating at 400 kHz are direct substitutes. Parts with higher clock frequencies (1 MHz) are functionally compatible but represent performance upgrades.

Access Time Tolerance: Parts with access times of 900 ns or 4.6 µs are acceptable substitutes, as slower access times do not prevent circuit operation in standard I2C applications.

Voltage Supply Range: Substitutes must support the minimum 2.5V supply requirement of the main part. Parts with extended lower voltage ranges (1.7V or 1.8V) are compatible.

Operating Temperature Range: The main part operates -40°C to 85°C. Substitutes with identical or extended temperature ranges are acceptable.

Package Specification: All substitutes use 8-SOIC surface mount packaging with identical physical dimensions (0.154", 3.90mm Width).

Compliance Status: All substitutes maintain ROHS3 compliance and Active or equivalent product status.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temperature	Package	Product Status
24LC01BHT-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24LC01BH-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24AA014HT-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24AA01T-I/SN	Microchip Technology	1Kbit	400 kHz	3500 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24LC01BT-E/SN	Microchip Technology	1Kbit	400 kHz	4.6 µs	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
24LC01BT-I/SN	Microchip Technology	1Kbit	400 kHz	4.6 µs	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
AT24CS01-SSHM-T	Microchip Technology	1Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
24LC014T-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
BR24C21FJ-E2	Rohm Semiconductor	1Kbit	400 kHz	Not Specified	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
M24C01-RMN6TP	STMicroelectronics	1Kbit	400 kHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
M24C01-WMN6P	STMicroelectronics	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Not For New Designs

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance): 24LC01BH-I/SN, 24LC014T-I/SN, and M24C01-RMN6TP provide equivalent functionality with matching 900 ns access time and 400 kHz clock frequency. These parts are suitable for one-to-one replacement in existing designs.

Extended Voltage Range Substitutes: 24AA014HT-I/SN and 24AA01T-I/SN support lower supply voltage operation (1.7V minimum) while maintaining 1Kbit capacity and I2C interface. These are compatible for applications requiring extended voltage range capability.

Extended Temperature Range Substitute: 24LC01BT-E/SN operates to 125°C maximum, providing thermal margin for high-temperature applications while maintaining 2.5V to 5.5V supply compatibility.

Performance Upgrade Option: AT24CS01-SSHM-T operates at 1 MHz clock frequency with 550 ns access time, offering faster I2C communication while maintaining 1Kbit memory organization and 8-SOIC packaging.

Cross-Manufacturer Alternatives: M24C01-RMN6TP (STMicroelectronics) and BR24C21FJ-E2 (Rohm Semiconductor) provide functionally equivalent 1Kbit I2C EEPROM solutions in 8-SOIC packaging with matching electrical specifications.

Obsolescence Consideration: M24C01-WMN6P carries "Not For New Designs" status and should be avoided for new circuit development despite electrical equivalence.

Frequently Asked Questions (FAQ)

Q: Can 24AA01T-I/SN replace 24LC01BHT-I/SN in all applications?

A: 24AA01T-I/SN is electrically compatible with 3500 ns access time versus 900 ns for the main part. In standard I2C applications operating at 400 kHz, the slower access time does not prevent functionality. However, applications with strict timing requirements may require verification.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging is supplied on continuous tape for automated assembly processes. Cut Tape (CT) & Digi-Reel packaging provides the same component in smaller quantities on cut tape segments. Both use identical 8-SOIC surface mount packages with no electrical or functional differences.

Q: Is AT24CS01-SSHM-T a suitable substitute despite 1 MHz clock frequency?

A: Yes. The 1 MHz clock frequency is a performance upgrade that maintains backward compatibility with 400 kHz I2C bus operation. The device will operate correctly on standard 400 kHz I2C buses while offering faster communication capability when the bus supports higher frequencies.

Q: Can I use M24C01-WMN6P in new designs?

A: M24C01-WMN6P is marked "Not For New Designs" and should not be selected for new circuit development. Use M24C01-RMN6TP or equivalent active-status alternatives instead.

Q: What voltage range must a substitute support?

A: Substitutes must support the main part's minimum supply voltage of 2.5V. Parts with extended lower voltage ranges (1.7V or 1.8V) are compatible and provide additional design flexibility for low-power applications.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, ensuring compatibility with environmental and regulatory requirements matching the main part.

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