AT24C01B-TSU-T Equivalent & Substitute Parts

Part Overview

The AT24C01B-TSU-T is a 1Kbit EEPROM memory IC with I2C interface operating at 1 MHz, manufactured by Microchip Technology in SOT-23-5 surface mount packaging. This component is classified as obsolete, which necessitates identification of active equivalent parts to ensure design continuity and supply chain reliability. The part maintains full compatibility with standard I2C protocols and operates across industrial temperature ranges, making substitute selection critical for ongoing production and maintenance applications.

Substiute Parts

AT24C01B-TSU-T

Microchip TechnologyIn Stock: 8825AT24C01B-TSU-T Datasheet

Current PartRFQ

AT24CS01-STUM-T

Microchip TechnologyIn Stock: 1000413AT24CS01-STUM-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT24C01B-TSU-T is determined by strict equivalence across the following critical parameters:

• Memory capacity (1Kbit) and organization (128 x 8 bits)
• I2C serial interface protocol
• Operating frequency (1 MHz maximum)
• Access time specification (550 ns)
• Write cycle time (5ms)
• Supply voltage range compatibility
• Operating temperature range (-40°C to 85°C)
• Physical package (SOT-23-5 surface mount)
• Regulatory compliance (RoHS3, REACH)

The AT24CS01-STUM-T meets all these criteria and represents the active production equivalent. Substitution is valid only when all parameters remain within specified tolerances.

Parameter Comparison

Engineering Selection Recommendations

The AT24CS01-STUM-T is the direct equivalent for AT24C01B-TSU-T replacement. Selection is based on the following factors:

• Both parts are manufactured by Microchip Technology, ensuring consistent design and quality standards
• The substitute maintains identical electrical specifications across all critical parameters
• AT24CS01-STUM-T is in active production status, providing long-term supply availability
• Supply voltage range of the substitute (1.7V ~ 5.5V) encompasses the original specification (1.8V ~ 5.5V), ensuring compatibility in all existing applications
• Both parts carry identical regulatory certifications (RoHS3, REACH Unaffected)
• Pinout and package dimensions are identical (SOT-23-5), enabling direct PCB-level substitution without layout modifications

Frequently Asked Questions (FAQ)

Q: Can AT24CS01-STUM-T be used as a direct replacement for AT24C01B-TSU-T?

A: Yes. Both parts are electrically and mechanically equivalent. The substitute operates across an identical temperature range, maintains the same I2C interface protocol, and is housed in the same SOT-23-5 package. No circuit modifications are required.

Q: What is the difference in supply voltage specifications?

A: AT24C01B-TSU-T operates from 1.8V to 5.5V, while AT24CS01-STUM-T operates from 1.7V to 5.5V. The substitute has a lower minimum voltage threshold, making it compatible with all applications designed for the original part.

Q: Are there any differences in memory access characteristics?

A: No. Both parts provide identical access time (550 ns), write cycle time (5ms), and clock frequency (1 MHz). Data access patterns and timing-dependent operations remain unchanged.

Q: Why is the original part obsolete?

A: AT24C01B-TSU-T is classified as obsolete by the manufacturer. AT24CS01-STUM-T represents the active production equivalent and is the recommended part for new designs and ongoing supply requirements.

Q: Is the packaging identical?

A: Yes. Both parts use SOT-23-5 surface mount packaging with identical pinout and physical dimensions. PCB footprints are directly compatible without modification.

Q: Are regulatory certifications maintained?

A: Yes. Both parts are RoHS3 compliant and REACH unaffected, maintaining identical environmental and regulatory compliance status.