AT21CS01-SSHM14-T Equivalent & Substitute Parts

Part Overview

The AT21CS01-SSHM14-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 non-volatile memory with 128 x 8 bit organization, housed in an 8-SOIC surface mount package. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent memory capacity, interface compatibility, and package specifications align within the allowed electrical and mechanical parameters for this EEPROM category.

Substiute Parts

AT21CS01-SSHM14-T

Microchip TechnologyIn Stock: 976AT21CS01-SSHM14-T Datasheet

Current PartRFQ

24AA01T-I/SN

Microchip TechnologyIn Stock: 1908924AA01T-I/SN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT21CS01-SSHM14-T is determined by the following critical parameters:

• Memory capacity must equal 1Kbit with 128 x 8 organization
• Memory interface must support I2C protocol
• Package must be 8-SOIC with identical physical dimensions (0.154", 3.90mm Width)
• Surface mount mounting type required
• Operating temperature range must encompass -40°C ~ 85°C
• Supply voltage range must be compatible with system requirements
• RoHS3 compliance and REACH unaffected status required

The 24AA01T-I/SN qualifies as a substitute based on matching memory capacity, I2C interface support, identical 8-SOIC package specification, and equivalent compliance certifications. Clock frequency differences and expanded voltage supply range do not preclude substitution when system design accommodates these variations.

Parameter Comparison

Engineering Selection Recommendations

Selection between AT21CS01-SSHM14-T and 24AA01T-I/SN is based on product availability, compliance requirements, and system specifications. Both components maintain Active product status with verified RoHS3 compliance and REACH unaffected designation. The 24AA01T-I/SN offers higher clock frequency capability (400 kHz versus 125 kbps) and extended voltage supply range (1.7V ~ 5.5V versus 1.7V ~ 3.6V), providing operational flexibility in systems requiring faster I2C communication or broader supply voltage tolerance. Identical memory capacity, organization, write cycle time, operating temperature range, and 8-SOIC package specification ensure functional interchangeability within these parameter boundaries.

Frequently Asked Questions (FAQ)

Q: Can the 24AA01T-I/SN directly replace the AT21CS01-SSHM14-T in existing designs?

A: Direct replacement is possible when system design accommodates the 24AA01T-I/SN's higher clock frequency (400 kHz) and extended voltage supply range (1.7V ~ 5.5V). Both components share identical memory capacity, organization, write cycle time, operating temperature range, and 8-SOIC package dimensions.

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

A: The 24AA01T-I/SN operates at 400 kHz clock frequency compared to the AT21CS01-SSHM14-T's 125 kbps, and supports a wider supply voltage range of 1.7V ~ 5.5V versus 1.7V ~ 3.6V. The AT21CS01-SSHM14-T includes Single Wire interface capability in addition to I2C, while the 24AA01T-I/SN supports I2C only.

Q: Are package dimensions identical between these parts?

A: Yes. Both components use 8-SOIC packaging with 0.154" (3.90mm) width specification, ensuring identical PCB footprint and mounting requirements.

Q: Do both parts meet the same compliance standards?

A: Yes. Both AT21CS01-SSHM14-T and 24AA01T-I/SN are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory requirements.

Q: Which part should be selected for new designs?

A: Selection depends on system requirements. The 24AA01T-I/SN's higher clock frequency and extended voltage range provide greater operational flexibility. The AT21CS01-SSHM14-T's Single Wire interface option may be required for specific legacy system compatibility.