AT21CS01-SSHM11-T Equivalent & Substitute Parts

Part Overview

The AT21CS01-SSHM11-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. Substitute parts are identified when equivalent memory capacity, interface protocol, package form factor, and voltage supply range maintain functional compatibility within the specified operating parameters.

Substiute Parts

AT21CS01-SSHM11-T

Microchip TechnologyIn Stock: 1181AT21CS01-SSHM11-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-SSHM11-T is determined by the following critical parameters:

• Memory capacity must equal 1Kbit with 128 x 8 organization
• Package form factor must be 8-SOIC with identical 0.154" (3.90mm) width
• Memory interface must support I2C protocol
• Write cycle time must not exceed 5ms
• Voltage supply range must encompass or be compatible with 1.7V ~ 3.6V minimum requirement
• Operating temperature range must cover -40°C ~ 85°C
• RoHS3 compliance and REACH unaffected status required

The identified substitute part 24AA01T-I/SN meets these criteria with the following considerations: it maintains identical memory capacity and organization, uses the same 8-SOIC package, supports I2C interface, and operates within compatible temperature and voltage parameters.

Parameter Comparison

Engineering Selection Recommendations

The 24AA01T-I/SN qualifies as a direct substitute based on Active product status, identical RoHS3 compliance, and REACH unaffected designation. Both components are manufactured by Microchip Technology and maintain equivalent memory specifications and package geometry. The substitute part operates at higher clock frequency (400 kHz versus 125 kbps) and supports an extended voltage supply range (1.7V ~ 5.5V versus 1.7V ~ 3.6V), providing enhanced performance margin without compromising compatibility. Both parts maintain identical write cycle time and operating temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can the 24AA01T-I/SN replace the AT21CS01-SSHM11-T in existing designs?

A: Yes. Both components share identical 1Kbit memory capacity, 128 x 8 organization, 8-SOIC package geometry, and operating temperature range. The substitute part's higher clock frequency and extended voltage range do not create incompatibility.

Q: What is the primary difference between these two parts?

A: The 24AA01T-I/SN operates at 400 kHz clock frequency compared to the AT21CS01-SSHM11-T at 125 kbps. Additionally, the substitute supports voltage supply from 1.7V to 5.5V versus 1.7V to 3.6V for the main part. The AT21CS01-SSHM11-T includes Single Wire interface capability, which is not specified for the 24AA01T-I/SN.

Q: Are both parts physically identical?

A: Yes. Both components use the 8-SOIC package with 0.154" (3.90mm) width, enabling direct PCB footprint compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the AT21CS01-SSHM11-T and 24AA01T-I/SN are RoHS3 compliant and REACH unaffected.

Q: What is the write cycle time for both parts?

A: Both components specify 5ms write cycle time for word and page operations.