Equivalent & Substitute Parts for 24LC025/ST

Part Overview

The 24LC025/ST is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface with 400 kHz clock frequency and 900 ns access time. Housed in an 8-TSSOP surface mount package, this non-volatile memory device operates across a 2.5V to 5.5V supply range and is rated for 0°C to 70°C operating temperature. The device is ROHS3 compliant and carries Active product status. Equivalent and substitute parts are identified to address inventory availability, extended temperature range requirements, or enhanced performance specifications while maintaining functional compatibility.

Key Parameters

Parameter	24LC025/ST
Memory Size	2Kbit
Memory Organization	256 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	0°C ~ 70°C
Package Type	8-TSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24LC025/ST are classified based on the following substitution criteria:

Primary Substitution Parameters:

Memory Size: 2Kbit (256 x 8 organization)
Memory Interface: I2C protocol
Package Type: 8-TSSOP form factor
Mounting Type: Surface Mount
Write Cycle Time: 5ms
RoHS Compliance: ROHS3 Compliant

Allowable Variations:

Clock Frequency: 400 kHz (standard) or 1 MHz (enhanced performance)
Access Time: 900 ns (standard) or faster (400 ns, 550 ns)
Voltage Supply Range: 2.5V ~ 5.5V (standard) or extended to 1.7V ~ 5.5V
Operating Temperature: 0°C ~ 70°C (standard) or extended to -40°C ~ 85°C
Manufacturer: Microchip Technology or Rohm Semiconductor

Parts are grouped into three categories: MFR Recommended (manufacturer-approved alternatives), Parametric Equivalents (matching all core specifications), and Enhanced Performance variants (higher clock frequency or wider operating ranges).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temperature	Package	Product Status
24LC025/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	0°C ~ 70°C	8-TSSOP	Active
24AA02-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24AA024-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24LC024-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24LC024H-I/ST	Microchip Technology	2Kbit	1 MHz	400 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24LC025-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24LC02B-I/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
AT24CS02-XHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
AT24HC02C-XHM-B	Microchip Technology	2Kbit	1 MHz	550 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active
24LC02B/ST	Microchip Technology	2Kbit	400 kHz	900 ns	2.5V ~ 5.5V	0°C ~ 70°C	8-TSSOP	Active
BR24G02FVT-3AGE2	Rohm Semiconductor	2Kbit	1 MHz	Not Specified	1.6V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active

Engineering Selection Recommendations

Direct Parametric Equivalent: 24LC02B/ST is a parametric equivalent matching all core specifications of the 24LC025/ST, including identical voltage supply range (2.5V ~ 5.5V) and operating temperature (0°C ~ 70°C). Both devices are ROHS3 compliant and Active status. This part is suitable for direct substitution in applications with identical environmental and electrical constraints.

Extended Temperature Range Alternatives: 24LC025-I/ST, 24LC024-I/ST, and 24LC02B-I/ST extend the operating temperature range to -40°C ~ 85°C while maintaining the 2.5V ~ 5.5V supply voltage. These parts are appropriate for applications requiring wider temperature operation. All three are ROHS3 compliant and Active status.

Low Voltage Supply Alternatives: 24AA02-I/ST and 24AA024-I/ST support extended supply voltage range (1.7V ~ 5.5V) and operating temperature (-40°C ~ 85°C). These parts are suitable for battery-powered or low-voltage applications. Both are ROHS3 compliant and Active status.

Enhanced Performance Variants: 24LC024H-I/ST, AT24CS02-XHM-T, and AT24HC02C-XHM-B operate at 1 MHz clock frequency with improved access times (400 ns or 550 ns). These parts support extended temperature ranges (-40°C ~ 85°C) and are ROHS3 compliant. 24LC024H-I/ST maintains 2.5V ~ 5.5V supply range, while AT24CS02-XHM-T and AT24HC02C-XHM-B support 1.7V ~ 5.5V.

Cross-Manufacturer Alternative: BR24G02FVT-3AGE2 from Rohm Semiconductor provides 1 MHz operation with 1.6V ~ 5.5V supply range and -40°C ~ 85°C operating temperature. This part is ROHS3 compliant and Active status, suitable for applications requiring alternative sourcing.

Frequently Asked Questions (FAQ)

Q: Can 24LC025-I/ST replace 24LC025/ST? A: Yes. Both devices share identical memory specifications (2Kbit, I2C, 400 kHz, 900 ns access time) and 8-TSSOP packaging. The primary difference is extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C). Substitution is valid for applications operating within the original temperature specification.

Q: What is the difference between 24LC024-I/ST and 24LC025-I/ST? A: Both devices are functionally equivalent with identical electrical specifications (2Kbit, I2C, 400 kHz, 900 ns, 2.5V ~ 5.5V, -40°C ~ 85°C). The part number suffix indicates different device variants within the Microchip product line. Selection between these parts is based on inventory availability and application requirements.

Q: Are 1 MHz variants (24LC024H-I/ST, AT24CS02-XHM-T) backward compatible? A: Yes. Higher clock frequency (1 MHz) and faster access time (400 ns or 550 ns) are performance enhancements that do not affect I2C protocol compatibility. These parts operate at the same 2Kbit memory capacity and 256 x 8 organization. Systems designed for 400 kHz operation will function with 1 MHz variants, though the enhanced performance will not be utilized.

Q: Can I use 24AA02-I/ST in a 2.5V ~ 5.5V application? A: Yes. The 24AA02-I/ST supports 1.7V ~ 5.5V supply range, which encompasses the 2.5V ~ 5.5V specification of the original part. This part is suitable for substitution in applications operating within the original voltage range.

Q: What is the significance of packaging variants (Tube, Cut Tape, Bulk)? A: Packaging affects procurement and handling but does not impact electrical or functional performance. Tube, Cut Tape (CT), and Bulk packaging options are available for the same die and electrical specifications. Selection is based on manufacturing assembly requirements and inventory management practices.

Q: Is BR24G02FVT-3AGE2 from Rohm Semiconductor fully compatible? A: The BR24G02FVT-3AGE2 meets all core functional requirements (2Kbit, I2C, 8-TSSOP, 1 MHz operation, -40°C ~ 85°C). The primary consideration is supply voltage range (1.6V ~ 5.5V versus 2.5V ~ 5.5V). This part is suitable for applications requiring alternative manufacturer sourcing or extended low-voltage operation.

Q: Which substitute part has the widest operating temperature range? A: All substitute parts with extended temperature specifications (-40°C ~ 85°C) provide the widest operating range. These include 24AA02-I/ST, 24AA024-I/ST, 24LC024-I/ST, 24LC024H-I/ST, 24LC025-I/ST, 24LC02B-I/ST, AT24CS02-XHM-T, AT24HC02C-XHM-B, and BR24G02FVT-3AGE2.

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