Equivalent & Substitute Parts for AT93C46W-10SC-2.7

Part Overview

The AT93C46W-10SC-2.7 is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring a 3-Wire Serial interface with 2 MHz clock frequency in an 8-SOIC surface mount package. This part is classified as obsolete, making identification of active equivalent components essential for new designs and production continuity. The substitute parts listed maintain functional compatibility through equivalent memory capacity, interface protocol, and physical packaging while offering improved product status and compliance certifications.

Substiute Parts

AT93C46W-10SC-2.7

Microchip TechnologyIn Stock: 1252AT93C46W-10SC-2.7 Datasheet

Current PartRFQ

M93C46-WMN6P

STMicroelectronicsIn Stock: 3499M93C46-WMN6P Datasheet

MFR RecommendedRFQ

M93C46-WMN6TP

STMicroelectronicsIn Stock: 61219M93C46-WMN6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT93C46W-10SC-2.7 is based on the following criteria:

Memory Capacity & Organization: Both substitute parts maintain 1Kbit capacity with 128 x 8 and 64 x 16 organization, ensuring data storage equivalence.

Serial Interface Compatibility: The AT93C46W-10SC-2.7 uses 3-Wire Serial protocol. The substitute parts (M93C46-WMN6P and M93C46-WMN6TP) employ Microwire interface, which is functionally compatible as Microwire is the industry-standard implementation of 3-Wire Serial communication for this device class.

Clock Frequency: All parts operate at 2 MHz, maintaining timing compatibility.

Physical Package: All parts use 8-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring PCB layout and footprint compatibility.

Voltage Supply Range: The substitute parts support 2.5V ~ 5.5V, which encompasses the original part's 2.7V ~ 5.5V range, providing broader supply voltage flexibility.

Write Cycle Time: Substitute parts feature 5ms write cycle time compared to the original 10ms, representing improved performance.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: M93C46-WMN6TP is the primary recommendation. This part is active in production status, ROHS3 compliant, and available in Cut Tape and Digi-Reel packaging formats suitable for automated assembly. The extended operating temperature range (-40°C ~ 85°C) and improved write cycle time (5ms) provide enhanced performance margins for industrial and commercial applications.

For Production Continuity: M93C46-WMN6P serves as an alternative when Cut Tape packaging is unavailable. Both STMicroelectronics substitutes are active products with current inventory availability and ROHS3 compliance, eliminating obsolescence risk associated with the original Microchip part.

Compliance Consideration: Both substitute parts meet ROHS3 requirements, addressing regulatory compliance gaps present in the original AT93C46W-10SC-2.7.

Frequently Asked Questions (FAQ)

Q: Is the Microwire interface of the substitute parts compatible with the 3-Wire Serial interface of the original part?

A: Yes. Microwire is the industry-standard implementation of 3-Wire Serial communication for EEPROM devices in this class. The M93C46 series from STMicroelectronics uses Microwire protocol, which maintains functional compatibility with 3-Wire Serial applications.

Q: Will the substitute parts work with existing PCB designs for the AT93C46W-10SC-2.7?

A: Yes. Both substitute parts use the identical 8-SOIC (0.154", 3.90mm Width) package, ensuring direct footprint compatibility without PCB redesign.

Q: What is the difference between M93C46-WMN6P and M93C46-WMN6TP?

A: Both parts are electrically identical. The primary difference is packaging: M93C46-WMN6P is supplied in Tube format, while M93C46-WMN6TP is available in Cut Tape and Digi-Reel formats. M93C46-WMN6TP is also verified as DiGi-Electronics Programmable.

Q: Are there any voltage supply considerations when switching to the substitute parts?

A: The substitute parts support 2.5V ~ 5.5V supply voltage, which is broader than the original part's 2.7V ~ 5.5V range. Designs operating at 2.5V ~ 2.7V will gain additional supply flexibility with the substitutes.

Q: Do the substitute parts offer improved performance compared to the original part?

A: Yes. The substitute parts feature a 5ms write cycle time compared to the original 10ms specification, representing a 50% improvement in write performance. Additionally, the extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) provides broader environmental compatibility.