93C46CT-E/MNY EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93C46CT-E/MNY is a 1Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, designed for Microwire serial interface applications. This component operates at 3 MHz clock frequency with a 2ms write cycle time and is housed in an 8-TDFN surface mount package. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent memory capacity, interface compatibility, and electrical operating ranges align with the original specification, enabling direct replacement in applications where functional requirements are met.

Substiute Parts

93C46CT-E/MNY

Microchip TechnologyIn Stock: 106793C46CT-E/MNY Datasheet

Current PartRFQ

AT93C46DY6-YH-T

Microchip TechnologyIn Stock: 2392AT93C46DY6-YH-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93C46CT-E/MNY is determined by the following critical parameters:

Memory Capacity & Organization: Substitute parts must provide 1Kbit capacity with 128 x 8 or 64 x 16 organization to maintain functional equivalence.

Serial Interface Compatibility: The original part uses Microwire protocol. Substitute parts using 3-Wire Serial interface are functionally compatible as both protocols support the same memory access patterns for 1Kbit EEPROM devices.

Electrical Operating Range: Supply voltage and temperature ranges must encompass or match the original specification to ensure reliable operation in the target application environment.

Package & Mounting: Surface mount packages with compatible pinout and physical dimensions enable direct board-level replacement.

Compliance & Certifications: RoHS3 compliance and REACH unaffected status are maintained across substitute parts to meet regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

AT93C46DY6-YH-T is an active production substitute for the 93C46CT-E/MNY. Both parts are manufactured by Microchip Technology and maintain ROHS3 compliance and REACH unaffected status.

The substitute part provides equivalent 1Kbit memory capacity with identical organization (128 x 8, 64 x 16). The 3-Wire Serial interface is functionally compatible with Microwire protocol for this memory class.

Key operational differences exist in clock frequency (2 MHz vs. 3 MHz), write cycle time (5ms vs. 2ms), and temperature range (-40°C ~ 85°C vs. -40°C ~ 125°C). The substitute part supports a wider supply voltage range (1.8V ~ 5.5V), providing greater flexibility in low-voltage applications.

Selection between these parts depends on application-specific requirements for operating temperature, write cycle performance, and supply voltage constraints. Both parts carry active product status and full regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can AT93C46DY6-YH-T directly replace 93C46CT-E/MNY on the PCB?

A: Physical replacement is possible due to compatible surface mount packages (8-TDFN and 8-Mini Map, both 2x3mm). However, interface protocol differences (Microwire vs. 3-Wire Serial) and operational parameter variations require circuit-level compatibility assessment before implementation.

Q: What are the key differences in operating temperature ranges?

A: The original 93C46CT-E/MNY operates from -40°C to 125°C, while the substitute AT93C46DY6-YH-T operates from -40°C to 85°C. Applications requiring operation above 85°C must use the original part.

Q: How do clock frequency differences affect substitution?

A: The original part operates at 3 MHz while the substitute operates at 2 MHz. This affects data transfer rates but does not prevent functional substitution in applications where the lower clock frequency is acceptable.

Q: Are both parts RoHS compliant?

A: Yes, both 93C46CT-E/MNY and AT93C46DY6-YH-T are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: What is the significance of the write cycle time difference?

A: The original part has a 2ms write cycle time while the substitute has a 5ms write cycle time. Applications with strict write performance requirements must account for this difference in system timing.

Q: Does the wider supply voltage range of the substitute part affect compatibility?

A: The substitute part supports 1.8V ~ 5.5V compared to the original 4.5V ~ 5.5V. This provides additional flexibility for low-voltage applications while remaining compatible with standard 5V systems.