AT21CS01-SSHM13-T Equivalent & Substitute Parts

Part Overview

The AT21CS01-SSHM13-T is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C and Single Wire interface capability at 125 kbps clock frequency. This component is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. The part is housed in an 8-SOIC surface mount package with supply voltage range of 1.7V to 3.6V and operating temperature range of -40°C to 85°C. Substitute parts are identified when equivalent memory capacity, organization, and package specifications are maintained while accommodating different interface speeds and voltage tolerances within acceptable engineering parameters.

Substiute Parts

AT21CS01-SSHM13-T

Microchip TechnologyIn Stock: 1051AT21CS01-SSHM13-T Datasheet

Current PartRFQ

24AA01T-I/SN

Microchip TechnologyIn Stock: 1908924AA01T-I/SN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 24AA01T-I/SN qualifies as a substitute for the AT21CS01-SSHM13-T based on the following alignment of critical parameters:

• Memory capacity and organization remain identical at 1Kbit with 128 x 8 configuration
• Package specification matches exactly: 8-SOIC (0.154", 3.90mm Width) surface mount
• Memory interface maintains I2C protocol compatibility
• Write cycle time is equivalent at 5ms
• Operating temperature range is identical: -40°C to 85°C
• Both components maintain RoHS3 compliance and REACH unaffected status
• Moisture sensitivity level (MSL 3) is consistent

The primary difference is the clock frequency specification: the substitute operates at 400 kHz compared to the main part's 125 kbps, and the supply voltage range is expanded to 1.7V ~ 5.5V. These differences represent enhanced performance characteristics that do not preclude substitution in applications designed for the original part.

Parameter Comparison

Engineering Selection Recommendations

Both the AT21CS01-SSHM13-T and 24AA01T-I/SN maintain Active product status with identical RoHS3 compliance and REACH unaffected certifications, establishing regulatory equivalence. The substitute part 24AA01T-I/SN is manufactured by the same supplier (Microchip Technology) and carries verified DiGi-Electronics programmable status, confirming production consistency and quality assurance alignment.

Selection between these parts should be based on application-specific requirements regarding clock frequency and supply voltage tolerance. The AT21CS01-SSHM13-T operates at 125 kbps with a constrained supply voltage window of 1.7V to 3.6V, while the 24AA01T-I/SN provides 400 kHz operation with expanded voltage tolerance to 5.5V. Both components satisfy identical memory capacity, package footprint, and thermal operating specifications.

Frequently Asked Questions (FAQ)

Q: Can the 24AA01T-I/SN directly replace the AT21CS01-SSHM13-T in existing designs?

A: Yes, the 24AA01T-I/SN is electrically and mechanically compatible as a substitute. Both components share identical 1Kbit memory capacity, 128 x 8 organization, I2C interface protocol, 8-SOIC package footprint, and operating temperature range. The substitute operates at higher clock frequency (400 kHz vs. 125 kbps) and accepts higher supply voltages (up to 5.5V vs. 3.6V), which are backward-compatible enhancements.

Q: What are the key differences between these two parts?

A: The primary differences are clock frequency and supply voltage range. The AT21CS01-SSHM13-T operates at 125 kbps with 1.7V to 3.6V supply, while the 24AA01T-I/SN operates at 400 kHz with 1.7V to 5.5V supply. The substitute also specifies access time at 3500 ns. Both maintain identical write cycle time (5ms), memory organization, and package specifications.

Q: Are there any interface compatibility concerns?

A: The AT21CS01-SSHM13-T supports both I2C and Single Wire interfaces, while the 24AA01T-I/SN supports I2C interface. Applications utilizing only I2C protocol will experience no compatibility issues. Applications requiring Single Wire interface operation must retain the original AT21CS01-SSHM13-T component.

Q: Do both parts meet the same compliance standards?

A: Yes, both components are RoHS3 compliant, REACH unaffected, and carry identical MSL 3 (168 Hours) moisture sensitivity ratings. Both maintain Active product status with equivalent regulatory and environmental certifications.

Q: What packaging formats are available for the substitute part?

A: The 24AA01T-I/SN is available in Cut Tape (CT) and Digi-Reel packaging formats, with Tape & Reel (TR) as the standard supplier device package. The original AT21CS01-SSHM13-T packaging specification is not detailed in the provided data.