24LC01BHT-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC01BHT-I/ST is a 1Kbit I2C EEPROM memory IC manufactured by Microchip Technology in an 8-TSSOP surface mount package. This non-volatile memory device operates at 400 kHz I2C clock frequency with 900 ns access time and supports supply voltages from 2.5V to 5.5V across the -40°C to 85°C operating temperature range. The part is ROHS3 compliant and carries an Active product status. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters to ensure functional compatibility in circuit applications.

Key Parameters

Parameter	24LC01BHT-I/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 ~ 85°C
Package Type	8-TSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24LC01BHT-I/ST are classified based on the following substitution criteria:

Primary Substitution Parameters:

Memory Size: 1Kbit (128 x 8 organization)
Memory Interface: I2C protocol
Package Type: 8-TSSOP form factor
Mounting Type: Surface Mount
Operating Temperature Range: -40°C to 85°C
Write Cycle Time: 5ms

Secondary Compatibility Parameters:

Clock Frequency: 400 kHz (primary specification; higher frequencies are compatible)
Access Time: 900 ns (primary specification; faster access times are compatible)
Voltage Supply Range: 2.5V ~ 5.5V (minimum 2.5V required; wider ranges are compatible)

Substitute parts meeting all primary parameters and maintaining compatibility with secondary parameters are classified as direct functional equivalents. Parts with identical electrical specifications are listed as MFR Recommended or Parametric Equivalent designations based on manufacturer recommendation status and product lifecycle stage.

Parameter Comparison

Part Number	Manufacturer	Memory Size	I2C Clock	Access Time	Voltage Supply	Package	Product Status	Inventory
24LC01BHT-I/ST	Microchip Technology	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	8-TSSOP	Active	2400 Pcs
24LC01BT-I/ST	Microchip Technology	1Kbit	400 kHz	4.6 µs	2.5V ~ 5.5V	8-TSSOP	Active	2100 Pcs
AT24CS01-XHM-T	Microchip Technology	1Kbit	1 MHz	550 ns	1.7V ~ 5.5V	8-TSSOP	Active	25400 Pcs
24LC014T-I/ST	Microchip Technology	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	8-TSSOP	Active	3435 Pcs
BR24G01FVT-3GE2	Rohm Semiconductor	1Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	8-TSSOP-B	Active	1163 Pcs
BR24L01AFVT-WE2	ROHM Semiconductor	1Kbit	400 kHz	Not Specified	1.8V ~ 5.5V	8-TSSOP-B	Active	5873 Pcs
BR24T01FVT-WE2	Rohm Semiconductor	1Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	8-TSSOP-B	Active	1284 Pcs
M24C01-RDW6TP	STMicroelectronics	1Kbit	400 kHz	900 ns	1.8V ~ 5.5V	8-TSSOP	Active	53100 Pcs
M24C01-WDW6TP	STMicroelectronics	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	8-TSSOP	Not For New Designs	111051 Pcs

Engineering Selection Recommendations

Direct Functional Equivalents (Recommended for New Designs):

24LC01BT-I/ST, 24LC014T-I/ST, AT24CS01-XHM-T, M24C01-RDW6TP, BR24G01FVT-3GE2, BR24L01AFVT-WE2, and BR24T01FVT-WE2 are all Active product status devices suitable for new circuit designs. These parts maintain 1Kbit memory capacity, I2C interface compatibility, 8-TSSOP package form factor, and -40°C to 85°C operating temperature range.

Microchip Technology Parts: 24LC01BT-I/ST and 24LC014T-I/ST provide identical voltage supply range (2.5V ~ 5.5V) to the primary part. 24LC01BT-I/ST features slower access time (4.6 µs) while 24LC014T-I/ST matches the 900 ns specification. AT24CS01-XHM-T operates at 1 MHz clock frequency with improved 550 ns access time and extended voltage range (1.7V ~ 5.5V).

STMicroelectronics Parts: M24C01-RDW6TP matches all primary electrical specifications with 900 ns access time and 400 kHz clock frequency, supporting 1.8V ~ 5.5V supply range. M24C01-WDW6TP carries "Not For New Designs" status and should not be selected for new applications despite high inventory availability.

Rohm Semiconductor Parts: BR24G01FVT-3GE2, BR24L01AFVT-WE2, and BR24T01FVT-WE2 use 8-TSSOP-B package variant with extended lower voltage support (1.6V or 1.8V minimum). These parts are functionally compatible but require PCB layout verification for package variant compatibility.

Frequently Asked Questions (FAQ)

Q: Can 24LC01BT-I/ST replace 24LC01BHT-I/ST directly?

A: Yes. Both parts are Microchip Technology 1Kbit I2C EEPROM devices in 8-TSSOP packages with identical voltage supply range (2.5V ~ 5.5V) and operating temperature (-40°C ~ 85°C). The primary difference is access time: 24LC01BT-I/ST specifies 4.6 µs versus 900 ns for the original part. This slower access time is compatible with I2C protocol timing requirements and does not affect functional operation in standard applications.

Q: What is the difference between 8-TSSOP and 8-TSSOP-B packages?

A: Both are 8-pin thin shrink small outline packages with 0.173" width and 4.40mm body dimensions. The -B variant designation indicates a package revision by the manufacturer. PCB footprints are mechanically compatible, but design documentation should be verified with the specific manufacturer datasheet to confirm pin assignment and thermal characteristics.

Q: Is AT24CS01-XHM-T compatible with circuits designed for 24LC01BHT-I/ST?

A: Yes, with voltage supply considerations. AT24CS01-XHM-T maintains 1Kbit capacity, I2C interface, and 8-TSSOP package. It operates at 1 MHz clock frequency (faster than the 400 kHz specification) and 550 ns access time (faster than 900 ns), both of which are backward compatible. The extended voltage range (1.7V ~ 5.5V) supports lower supply voltages than the original part (2.5V minimum). Circuits designed for 2.5V ~ 5.5V operation are fully compatible.

Q: Why is M24C01-WDW6TP marked "Not For New Designs"?

A: M24C01-WDW6TP carries this designation due to product lifecycle management by STMicroelectronics. While the part remains functionally equivalent with 900 ns access time and 400 kHz clock frequency, new circuit designs should select M24C01-RDW6TP or other Active status alternatives to ensure long-term supply availability and manufacturer support.

Q: Can Rohm Semiconductor parts substitute for Microchip parts in existing designs?

A: Rohm BR24G01FVT-3GE2, BR24L01AFVT-WE2, and BR24T01FVT-WE2 are functionally equivalent in memory capacity, I2C interface, and package dimensions. However, the 8-TSSOP-B package variant requires verification that PCB footprints and thermal management designs accommodate the manufacturer-specific package revision. Electrical specifications are compatible across the -40°C to 85°C temperature range.

Q: What voltage supply range should be specified for maximum compatibility?

A: The original 24LC01BHT-I/ST specifies 2.5V ~ 5.5V. All substitute parts listed support this range or extend it to lower voltages (1.6V, 1.7V, or 1.8V minimum). For maximum compatibility across all listed substitutes, designs should operate within 2.5V ~ 5.5V. If lower voltage operation is required, AT24CS01-XHM-T (1.7V minimum), M24C01-RDW6TP (1.8V minimum), BR24G01FVT-3GE2 (1.6V minimum), or BR24L01AFVT-WE2 (1.8V minimum) are suitable selections.

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