93AA46A-I/P EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93AA46A-I/P is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and operating at 2 MHz clock frequency. This device is designed for applications requiring non-volatile memory storage in compact 8-DIP through-hole packaging. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance, memory capacity, interface compatibility, and physical packaging specifications are maintained across the component family, enabling direct replacement in existing designs.

Substiute Parts

93AA46A-I/P

Microchip TechnologyIn Stock: 83393AA46A-I/P Datasheet

Current PartRFQ

AT93C46D-PU

Microchip TechnologyIn Stock: 250303AT93C46D-PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The AT93C46D-PU qualifies as a direct substitute based on the following alignment of critical parameters:

Memory Capacity & Organization: Both devices provide 1Kbit storage capacity with 128 x 8 organization, ensuring identical data storage capability and address space compatibility.

Serial Interface Protocol: The 93AA46A-I/P uses Microwire protocol, while the AT93C46D-PU implements 3-Wire Serial protocol. These protocols are functionally equivalent for this memory class, supporting the same serial communication methodology with compatible timing and signal requirements.

Operating Specifications: Identical supply voltage range (1.8V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and clock frequency (2 MHz) ensure electrical compatibility in system integration.

Physical Package: Both devices utilize 8-DIP through-hole packaging with identical 0.300" (7.62mm) pitch, enabling direct PCB footprint compatibility and socket interchangeability.

Compliance & Certification: Both parts maintain ROHS3 compliance, EAR99 export classification, and MSL 1 moisture sensitivity rating, ensuring equivalent regulatory and environmental qualification status.

Parameter Comparison

Engineering Selection Recommendations

Both the 93AA46A-I/P and AT93C46D-PU maintain Active product status with equivalent compliance certifications (ROHS3, EAR99, REACH Unaffected), confirming long-term availability and regulatory qualification for production applications.

The AT93C46D-PU demonstrates improved write cycle performance at 5ms compared to the 93AA46A-I/P at 6ms, providing marginal performance advantage in write-intensive applications. The AT93C46D-PU additionally supports dual memory organization (128 x 8 and 64 x 16), offering enhanced flexibility for specific application requirements.

Selection between these parts should be based on existing firmware protocol implementation and system integration requirements. Both devices are electrically and mechanically interchangeable within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can the AT93C46D-PU directly replace the 93AA46A-I/P in existing designs?

A: Yes. Both devices share identical supply voltage range, operating temperature, clock frequency, package type, and through-hole mounting configuration. The 3-Wire Serial protocol of the AT93C46D-PU is functionally equivalent to the Microwire protocol of the 93AA46A-I/P for this memory class, supporting direct substitution provided firmware supports the protocol variant.

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

A: Both protocols implement serial communication using three signal lines for this memory class. Microwire and 3-Wire Serial are functionally compatible implementations within the Microchip EEPROM product family, supporting equivalent timing and signal requirements for memory access operations.

Q: Are the PCB footprints identical?

A: Yes. Both devices utilize 8-DIP through-hole packaging with 0.300" (7.62mm) pitch, ensuring identical PCB footprint compatibility and direct socket interchangeability without layout modifications.

Q: What are the compliance and certification differences?

A: Both parts maintain identical compliance status: ROHS3 compliant, EAR99 export classification, REACH unaffected, and MSL 1 moisture sensitivity rating. No compliance or certification differences exist between these devices.

Q: Does the AT93C46D-PU offer any performance advantages?

A: The AT93C46D-PU provides a 1ms faster write cycle time (5ms versus 6ms) and supports dual memory organization options (128 x 8 and 64 x 16). These represent marginal performance and flexibility improvements for specific application scenarios.