AT93C46R-10SC-2.7 Equivalent & Substitute Parts

Part Overview

The AT93C46R-10SC-2.7 is a 1Kbit EEPROM memory IC with 3-Wire Serial interface, manufactured by Microchip Technology in 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device operates across a 2.7V to 5.5V supply range with a 2 MHz clock frequency and 10ms write cycle time, serving applications requiring non-volatile serial memory storage in compact form factors.

Substiute Parts

AT93C46R-10SC-2.7

Microchip TechnologyIn Stock: 23008AT93C46R-10SC-2.7 Datasheet

Current PartRFQ

93AA46/SN

Microchip TechnologyIn Stock: 293293AA46/SN Datasheet

DirectRFQ

AT93C46DN-SH-B

Microchip TechnologyIn Stock: 20128AT93C46DN-SH-B Datasheet

MFR RecommendedRFQ

CAV93C46VE-GT3

onsemiIn Stock: 3722CAV93C46VE-GT3 Datasheet

MFR RecommendedRFQ

M93C46-RMN3TP/K

STMicroelectronicsIn Stock: 9539M93C46-RMN3TP/K Datasheet

MFR RecommendedRFQ

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 for the AT93C46R-10SC-2.7 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Memory size: 1Kbit
• Package type: 8-SOIC surface mount
• Memory format: EEPROM non-volatile technology
• Clock frequency: 2 MHz
• Supply voltage overlap with 2.7V minimum requirement

Interface Consideration: The AT93C46R-10SC-2.7 uses 3-Wire Serial interface. Substitute parts may employ either 3-Wire Serial or Microwire interface protocols, as both are compatible serial communication standards for this memory class and pin-compatible in 8-SOIC packaging.

Substitutes are grouped into two categories:

1. Direct 3-Wire Serial Interface Match: AT93C46DN-SH-B maintains identical interface protocol with enhanced specifications (active status, wider temperature range, faster write cycle).

2. Microwire Interface Alternatives: 93AA46/SN, CAV93C46VE-GT3, M93C46-RMN3TP/K, M93C46-WMN6P, and M93C46-WMN6TP provide equivalent memory capacity and packaging with Microwire serial interface, which is functionally compatible for 1Kbit EEPROM applications in 8-SOIC form factor.

Parameter Comparison

Engineering Selection Recommendations

For Direct Protocol Replacement: AT93C46DN-SH-B is the primary recommendation for applications requiring 3-Wire Serial interface continuity. This part maintains identical interface protocol while offering active product status, ROHS3 compliance, extended temperature range (-40°C to 85°C), and improved write cycle time (5ms versus 10ms). Supply voltage range (1.8V to 5.5V) encompasses the original specification.

For Microwire Interface Applications: When Microwire protocol is acceptable, multiple active alternatives exist:

• M93C46-WMN6TP (STMicroelectronics): Highest inventory availability (61,180 pcs), verified programmable status, 2.5V to 5.5V supply range, -40°C to 85°C operating temperature, 5ms write cycle time.

• M93C46-RMN3TP/K (STMicroelectronics): Automotive-grade with AEC-Q100 qualification, extended temperature range (-40°C to 125°C), 1.8V to 5.5V supply range, suitable for automotive applications.

• CAV93C46VE-GT3 (onsemi): Automotive-grade with AEC-Q100 qualification, highest temperature rating (-40°C to 125°C), 2.5V to 5.5V supply range.

• 93AA46/SN (Microchip Technology): Lowest supply voltage floor (1.8V), verified programmable status, maintains Microchip manufacturer continuity.

All substitute parts are ROHS3 compliant and REACH unaffected, addressing environmental regulatory requirements absent in the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can I use a Microwire interface part as a substitute for the 3-Wire Serial AT93C46R-10SC-2.7?

A: Microwire and 3-Wire Serial are distinct serial communication protocols. Direct substitution requires protocol compatibility at the system level. If your application firmware or hardware interface is designed specifically for 3-Wire Serial, use AT93C46DN-SH-B. If your system supports Microwire protocol, the M93C46 and 93AA46 series are compatible alternatives.

Q: What is the difference between the write cycle times listed (10ms versus 5ms)?

A: Write cycle time is the duration required to complete a single word or page write operation to the EEPROM. The original AT93C46R-10SC-2.7 specifies 10ms; substitute parts offer 5ms, representing a 2x improvement. This does not affect functional compatibility but reduces overall programming time in production environments.

Q: Are all substitute parts pin-compatible with the AT93C46R-10SC-2.7?

A: All listed substitutes use 8-SOIC surface mount packaging with identical 0.154" (3.90mm) width. Pin assignments for 1Kbit EEPROM devices in this package class are standardized. Verify pinout compatibility with your specific application schematic before implementation.

Q: Which substitute part has the widest operating temperature range?

A: CAV93C46VE-GT3 and M93C46-RMN3TP/K both operate across -40°C to 125°C, the widest range among available substitutes. Both are automotive-grade with AEC-Q100 qualification.

Q: What is the minimum supply voltage requirement for substitutes?

A: The original part requires 2.7V minimum. Substitutes range from 1.8V (93AA46/SN, AT93C46DN-SH-B, M93C46-RMN3TP/K) to 2.5V (CAV93C46VE-GT3, M93C46-WMN6P, M93C46-WMN6TP). Verify your system's minimum supply voltage against the selected substitute specification.

Q: Is RoHS compliance important for my application?

A: The original AT93C46R-10SC-2.7 is RoHS non-compliant. All active substitute parts are ROHS3 compliant. If your application, end market, or supply chain requires RoHS compliance, any listed substitute satisfies this requirement.