RM24C32C-LTAI-B Equivalent & Substitute Parts

Part Overview

The RM24C32C-LTAI-B is a 32Kbit CBRAM non-volatile memory IC manufactured by Renesas Electronics Corporation, featuring I2C interface operation at 1 MHz and 8-TSSOP surface mount packaging. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. Substitute parts must maintain compatibility across memory capacity, interface protocol, package form factor, and electrical operating parameters.

Substiute Parts

RM24C32C-LTAI-B

Renesas Electronics CorporationIn Stock: 861RM24C32C-LTAI-B Datasheet

Current PartRFQ

24CW320T-I/ST

Microchip TechnologyIn Stock: 96024CW320T-I/ST Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RM24C32C-LTAI-B is determined by strict alignment of the following critical parameters:

• Memory Capacity: 32Kbit (non-negotiable)
• Memory Interface: I2C protocol (non-negotiable)
• Clock Frequency: 1 MHz operation (non-negotiable)
• Package Form Factor: 8-TSSOP surface mount (non-negotiable)
• Supply Voltage Range: Must encompass or overlap with 1.65V ~ 3.6V
• Operating Temperature Range: Must encompass or overlap with -40°C ~ 85°C
• Non-Volatile Storage: Required for data retention
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

The 24CW320T-I/ST from Microchip Technology satisfies all substitution criteria. While the memory format differs (EEPROM vs. CBRAM), both technologies provide equivalent non-volatile storage functionality at the specified capacity and interface parameters. The substitute part maintains identical package geometry, I2C interface protocol, and clock frequency specifications.

Parameter Comparison

Engineering Selection Recommendations

The 24CW320T-I/ST is a direct functional substitute for the obsolete RM24C32C-LTAI-B based on the following engineering criteria:

Product Status: The RM24C32C-LTAI-B is classified as obsolete, while the 24CW320T-I/ST maintains active manufacturing status, ensuring long-term availability and supply chain continuity.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for electronic component procurement and deployment.

Electrical Compatibility: The substitute part's supply voltage range (1.6V ~ 5.5V) encompasses the main part's operating range (1.65V ~ 3.6V), ensuring functional operation across all specified voltage conditions. Operating temperature ranges are identical (-40°C ~ 85°C).

Interface and Timing: I2C protocol, clock frequency (1 MHz), and package geometry (8-TSSOP) are identical between main and substitute parts, enabling direct pin-compatible replacement without circuit modification.

Memory Technology Difference: The substitute employs EEPROM technology rather than CBRAM. Both technologies provide equivalent non-volatile storage functionality at the specified 32Kbit capacity. The page write cycle time of the substitute (5ms) is longer than the main part (1.2ms), which may impact applications requiring rapid sequential write operations but does not affect functional compatibility for standard memory access patterns.

Inventory Status: The 24CW320T-I/ST is available in active stock (917 Pcs), supporting immediate procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can the 24CW320T-I/ST directly replace the RM24C32C-LTAI-B without circuit modification?

A: Yes. Both components share identical I2C interface protocol, 1 MHz clock frequency, 8-TSSOP package geometry, and pin configuration. No circuit redesign is required for direct substitution.

Q: What is the functional difference between CBRAM and EEPROM memory technologies?

A: Both CBRAM and EEPROM are non-volatile memory technologies that retain data without power. At the 32Kbit capacity and I2C interface level specified for this application, both technologies provide equivalent data storage and retrieval functionality. The primary difference is internal cell architecture and write cycle timing.

Q: Does the longer page write cycle time (5ms vs. 1.2ms) affect system compatibility?

A: The substitute part's page write cycle time is longer, which may impact applications performing rapid sequential write operations. For standard memory access patterns and typical I2C bus operation, this difference does not affect functional compatibility. Applications requiring the original write performance specifications should evaluate timing-critical requirements against the substitute's 5ms page write specification.

Q: Are the supply voltage ranges compatible?

A: Yes. The substitute part operates across 1.6V ~ 5.5V, which encompasses the main part's 1.65V ~ 3.6V range. The substitute supports operation at the full voltage range of the original component.

Q: Is the 24CW320T-I/ST available for immediate procurement?

A: Yes. The substitute part is classified as active product status with 917 Pcs in current stock inventory, supporting immediate procurement and production deployment.

Q: Do both components meet the same regulatory compliance standards?

A: Yes. Both the RM24C32C-LTAI-B and 24CW320T-I/ST maintain ROHS3 compliance and REACH unaffected status, satisfying identical regulatory requirements for component procurement and deployment.

Q: What is the memory organization difference between the two parts?

A: The main part specifies 32 Bytes page size organization, while the substitute specifies 4K x 8 organization. Both configurations support the same 32Kbit total capacity and I2C interface protocol. The organizational difference does not affect functional compatibility for standard I2C memory access operations.