24LC512-I/ST14 Equivalent & Substitute Parts

Part Overview

The 24LC512-I/ST14 is a 512Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface communication at 400 kHz with 900 ns access time. This component is housed in a 14-TSSOP surface mount package and operates across a supply voltage range of 2.5V to 5.5V with an operating temperature range of -40°C to 85°C. The part maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified to address inventory availability, performance requirements, or specific application constraints while maintaining functional compatibility within the I2C EEPROM category.

Key Parameters

Parameter	Value
Memory Size	512Kbit
Memory Organization	64K 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	14-TSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution logic for the 24LC512-I/ST14 is determined by the following critical parameters: memory capacity (512Kbit), memory organization (64K x 8), I2C interface protocol, and surface mount packaging. Substitute parts must maintain identical memory specifications and I2C communication protocol to ensure functional compatibility.

Two substitute parts are identified:

24FC512-I/ST14 qualifies as a substitute based on matching memory capacity, organization, and I2C interface. This part operates at an enhanced clock frequency of 1 MHz with improved access time of 400 ns, and supports an extended lower voltage supply range of 1.7V to 5.5V. The package remains 14-TSSOP, maintaining mechanical compatibility.

24LC512-I/ST qualifies as a substitute based on matching memory capacity, organization, clock frequency, and I2C interface specifications. This part differs in package configuration, utilizing an 8-TSSOP form factor instead of 14-TSSOP. Electrical specifications remain identical to the main part.

Parameter Comparison

Parameter	24LC512-I/ST14 (Main)	24FC512-I/ST14 (Substitute)	24LC512-I/ST (Substitute)
Memory Size	512Kbit	512Kbit	512Kbit
Memory Organization	64K x 8	64K x 8	64K x 8
Memory Interface	I2C	I2C	I2C
Clock Frequency	400 kHz	1 MHz	400 kHz
Access Time	900 ns	400 ns	900 ns
Write Cycle Time	5ms	5ms	5ms
Voltage Supply Range	2.5V ~ 5.5V	1.7V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	14-TSSOP	14-TSSOP	8-TSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three parts maintain Active product status and ROHS3 compliance, confirming current manufacturing availability and environmental regulatory adherence. Selection between the main part and substitutes depends on specific application requirements:

The 24LC512-I/ST14 remains the primary selection when standard I2C clock frequency of 400 kHz and 900 ns access time meet application timing requirements, with the 14-TSSOP package providing the specified form factor.

The 24FC512-I/ST14 is selected when enhanced performance is required, offering 1 MHz clock frequency and 400 ns access time. This part additionally supports lower voltage operation down to 1.7V, expanding compatibility with low-power system designs. The 14-TSSOP package maintains identical mechanical footprint.

The 24LC512-I/ST is selected when the 8-TSSOP package footprint is compatible with board layout constraints. Electrical and timing specifications remain identical to the main part, with reduced pin count and smaller physical dimensions.

Frequently Asked Questions (FAQ)

Q: Can 24FC512-I/ST14 be used as a direct replacement for 24LC512-I/ST14?

A: Yes. The 24FC512-I/ST14 maintains identical memory capacity, organization, and I2C interface protocol. Enhanced clock frequency and access time provide backward compatibility with applications designed for the 24LC512-I/ST14. The extended lower voltage range (1.7V minimum) expands operational flexibility without compromising existing designs.

Q: What is the primary difference between 24LC512-I/ST14 and 24LC512-I/ST?

A: The primary difference is package configuration. The 24LC512-I/ST14 uses 14-TSSOP packaging, while the 24LC512-I/ST uses 8-TSSOP packaging. All electrical specifications, memory capacity, and I2C interface parameters are identical. Package selection depends on PCB layout requirements and available board space.

Q: Are all three parts compatible with the same I2C bus configuration?

A: Yes. All three parts implement the I2C interface protocol and operate within compatible voltage ranges for standard I2C systems. The 24FC512-I/ST14 supports higher clock frequencies (1 MHz) compared to the 400 kHz specification of the other two parts, allowing faster data transfer rates on the same I2C bus.

Q: What are the compliance certifications for these parts?

A: All three parts are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is MSL 1 (unlimited) for all parts, indicating no moisture sensitivity restrictions during storage or handling.

Q: Can 24LC512-I/ST be used in applications requiring 14-TSSOP packaging?

A: No. The 24LC512-I/ST uses 8-TSSOP packaging and cannot be directly substituted in designs requiring 14-TSSOP form factor due to different pin configurations and physical dimensions. The 24FC512-I/ST14 maintains the 14-TSSOP package and serves as the appropriate substitute in this scenario.

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