93AA46BT-I/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93AA46BT-I/SN is a 1Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and operating at 2 MHz clock frequency. This device is packaged in 8-SOIC surface mount configuration and is rated for industrial temperature range (-40°C to 85°C). The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design flexibility permits selection from qualified alternatives meeting identical electrical and mechanical specifications.

Substiute Parts

93AA46BT-I/SN

Microchip TechnologyIn Stock: 4280593AA46BT-I/SN Datasheet

Current PartRFQ

93AA46B-I/SN

Microchip TechnologyIn Stock: 184893AA46B-I/SN Datasheet

DirectRFQ

AT93C46EN-SH-T

Microchip TechnologyIn Stock: 5854AT93C46EN-SH-T Datasheet

MFR RecommendedRFQ

BR93L46FJ-WE2

Rohm SemiconductorIn Stock: 2428BR93L46FJ-WE2 Datasheet

MFR RecommendedRFQ

BR93L46RF-WE2

Rohm SemiconductorIn Stock: 15400BR93L46RF-WE2 Datasheet

MFR RecommendedRFQ

BR93L46RFJ-WE2

Rohm SemiconductorIn Stock: 9308BR93L46RFJ-WE2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93AA46BT-I/SN is determined by the following critical parameters:

Primary Substitution Criteria:

• Memory capacity: 1Kbit (64 x 16 organization)
• Memory interface protocol: Microwire serial interface
• Clock frequency: 2 MHz operation
• Supply voltage compatibility: 1.8V ~ 5.5V range
• Operating temperature range: -40°C ~ 85°C minimum
• Package footprint: 8-SOIC surface mount
• Regulatory compliance: ROHS3 and REACH requirements

Substitution Categories:

Category 1 - Direct Microchip Technology Equivalent: 93AA46B-I/SN differs only in packaging format (Tube vs. Tape & Reel) while maintaining identical electrical specifications and Microwire interface protocol.

Category 2 - Alternative Interface Protocol (Microchip): AT93C46EN-SH-T uses 3-Wire Serial interface instead of Microwire, with marginally improved write cycle time (5ms vs. 6ms). This represents a functional alternative where interface protocol compatibility with the application circuit is confirmed.

Category 3 - Cross-Manufacturer Microwire Equivalents (Rohm Semiconductor): BR93L46FJ-WE2, BR93L46RF-WE2, and BR93L46RFJ-WE2 maintain Microwire interface protocol and identical memory specifications. Package variations exist (8-SOP-J, 8-SOP) with minor dimensional differences in package width (3.90mm vs. 4.40mm).

Parameter Comparison

Engineering Selection Recommendations

93AA46B-I/SN: Direct electrical equivalent suitable for applications where Tube packaging format is acceptable for assembly processes. Maintains identical Microwire protocol and electrical performance. Recommended for low-volume or manual assembly operations.

AT93C46EN-SH-T: Functionally compatible substitute where 3-Wire Serial interface protocol is supported by the application circuit design. Offers marginally improved write cycle time (5ms). Requires circuit-level interface protocol verification before implementation. Microchip Technology manufacturer ensures consistent quality and support.

BR93L46FJ-WE2, BR93L46RF-WE2, BR93L46RFJ-WE2: Cross-manufacturer alternatives maintaining Microwire protocol compatibility. All three Rohm Semiconductor parts deliver improved write cycle time (5ms vs. 6ms). Package footprint variations (8-SOP-J vs. 8-SOP) require PCB layout verification. All parts maintain ROHS3 compliance and identical voltage/temperature specifications. Selection between these three depends on packaging format requirements (Tape & Reel vs. Cut Tape) and specific package dimension compatibility with PCB design.

All listed substitutes maintain active product status, ROHS3 compliance, and REACH unaffected regulatory standing.

Frequently Asked Questions (FAQ)

Q: Can 93AA46B-I/SN be used as a direct replacement for 93AA46BT-I/SN?

A: Yes. Both parts are electrically identical with Microwire interface, 1Kbit capacity, 2 MHz operation, and 8-SOIC package. The only difference is packaging format (Tube vs. Tape & Reel). Substitution is valid provided the assembly process accommodates Tube format.

Q: What is the key difference between AT93C46EN-SH-T and the other substitutes?

A: AT93C46EN-SH-T uses 3-Wire Serial interface protocol instead of Microwire. While memory capacity and electrical specifications are identical, the serial communication protocol differs. This substitute requires confirmation that the application circuit supports 3-Wire Serial interface before implementation.

Q: Are Rohm Semiconductor parts (BR93L46 series) pin-compatible with the Microchip 93AA46BT-I/SN?

A: All listed Rohm parts maintain 8-pin SOIC/SOP package configuration with Microwire interface protocol. Pin compatibility is confirmed for Microwire protocol applications. However, package dimensions vary slightly (8-SOP-J: 3.90mm width vs. 8-SOP: 4.40mm width). PCB layout verification is required to confirm footprint compatibility with specific board design.

Q: What is the write cycle time difference between the main part and substitutes?

A: The 93AA46BT-I/SN specifies 6ms write cycle time. Rohm Semiconductor parts (BR93L46 series) and AT93C46EN-SH-T offer improved 5ms write cycle time. This represents a performance enhancement with no negative impact on compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the primary part.

Q: Which substitute should be selected for high-volume manufacturing?

A: For high-volume production, Tape & Reel packaging format is standard. Options include 93AA46BT-I/SN (primary), BR93L46FJ-WE2, or BR93L46RFJ-WE2. Selection depends on interface protocol requirement (Microwire vs. 3-Wire Serial) and cross-manufacturer preference.

Q: Can substitutes be mixed within a single production batch?

A: Substitution within a production batch is permissible only when all parts maintain identical interface protocol (Microwire) and electrical specifications. AT93C46EN-SH-T (3-Wire Serial) must not be mixed with Microwire parts in the same batch unless circuit design explicitly supports both protocols.