AT93C46C-10SC-2.7 Equivalent & Substitute Parts

Part Overview

The AT93C46C-10SC-2.7 is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring a 3-Wire Serial interface with a 2 MHz clock frequency. This component is designed for non-volatile memory applications requiring serial data access in compact 8-SOIC surface mount packaging.

The AT93C46C-10SC-2.7 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this memory IC.

Substiute Parts

AT93C46C-10SC-2.7

Microchip TechnologyIn Stock: 6219AT93C46C-10SC-2.7 Datasheet

Current PartRFQ

93LC46BXT-I/SNG

Microchip TechnologyIn Stock: 111593LC46BXT-I/SNG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT93C46C-10SC-2.7 is determined by the following critical parameters:

• Memory Capacity & Organization: 1Kbit capacity with 64 x 16 organization must be maintained
• Package Compatibility: 8-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm Width)
• Interface Protocol: Serial memory interface supporting the same data access method
• Voltage Supply Range: Operating voltage window must encompass or exceed the original 2.7V ~ 5.5V range
• Clock Frequency: 2 MHz operation capability
• Non-Volatile Memory Type: EEPROM technology requirement

The substitute part 93LC46BXT-I/SNG meets these criteria while offering improved product status and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 93LC46BXT-I/SNG is the primary substitute for the AT93C46C-10SC-2.7 based on the following engineering criteria:

Product Status: The substitute part maintains active product status, ensuring continued availability and manufacturer support, whereas the original part is obsolete.

Compliance & Certifications: The 93LC46BXT-I/SNG is ROHS3 compliant, addressing modern regulatory requirements. Both parts maintain REACH Unaffected and EAR99 ECCN classifications.

Electrical Compatibility: The substitute operates within an expanded voltage range (2.5V ~ 5.5V) and extended temperature range (-40°C ~ 85°C), providing greater operational flexibility. Write cycle time is improved at 6ms versus 10ms.

Physical Compatibility: Identical 8-SOIC packaging ensures direct board-level substitution without layout modifications.

Interface Consideration: The substitute employs Microwire protocol, which is compatible with 3-Wire Serial applications in typical implementation scenarios for this memory class.

Frequently Asked Questions (FAQ)

Q: Can the 93LC46BXT-I/SNG directly replace the AT93C46C-10SC-2.7 without circuit modifications?

A: Physical and electrical compatibility is maintained. The 8-SOIC package dimensions are identical, and the voltage supply range of the substitute encompasses the original specification. Interface protocol compatibility depends on the host controller's capability to support Microwire protocol in addition to 3-Wire Serial.

Q: What is the difference between 3-Wire Serial and Microwire interfaces?

A: Both are serial memory interface protocols. The substitute part uses Microwire, which is a related serial protocol. Compatibility requires that the host system controller supports Microwire communication or can be configured to operate with this protocol.

Q: Does the extended temperature range of the substitute part affect compatibility?

A: The extended operating temperature range (-40°C ~ 85°C) of the substitute is a superset of the original specification (0°C ~ 70°C). This provides enhanced capability without introducing compatibility issues for applications within the original temperature window.

Q: Is the improved write cycle time of the substitute part a concern?

A: The faster write cycle time (6ms versus 10ms) of the substitute represents improved performance. This does not create compatibility issues; systems designed for the original 10ms specification will operate correctly with the faster substitute.

Q: What packaging options are available for the substitute part?

A: The 93LC46BXT-I/SNG is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. The original part packaging specification was not detailed in the available data.

Q: Are there RoHS compliance implications for using the substitute?

A: The substitute part is ROHS3 compliant, whereas the original is RoHS non-compliant. This represents an improvement for applications subject to RoHS regulations and does not introduce compatibility concerns.