93LC46A/P EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC46A/P is a 1Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, featuring Microwire serial interface protocol. This non-volatile memory device operates at 2 MHz clock frequency with a 6ms write cycle time and supports supply voltages from 2.5V to 5.5V. The component is housed in an 8-DIP through-hole package and maintains active product status with ROHS3 compliance. Substitute parts are identified when equivalent memory capacity, interface protocol, package type, and electrical specifications align within acceptable operational parameters.

Substiute Parts

93LC46A/P

Microchip TechnologyIn Stock: 860593LC46A/P Datasheet

Current PartRFQ

93LC46A-I/P

Microchip TechnologyIn Stock: 449793LC46A-I/P Datasheet

MFR RecommendedRFQ

AT93C46D-PU

Microchip TechnologyIn Stock: 250303AT93C46D-PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 93LC46A/P are identified based on the following critical parameters:

Primary Substitution Criteria:

• Memory capacity: 1Kbit
• Package type: 8-DIP through-hole configuration
• Memory format: EEPROM non-volatile technology
• Clock frequency: 2 MHz operation
• Mounting compatibility: Through-hole assembly

Interface Protocol Consideration: The 93LC46A/P uses Microwire serial interface. The AT93C46D-PU employs 3-Wire Serial interface, which represents a different protocol family. While both are Microchip EEPROM solutions with identical memory capacity and package, the interface difference requires circuit-level compatibility verification.

Voltage and Temperature Ranges: The 93LC46A-I/P maintains identical supply voltage range (2.5V ~ 5.5V) and extends operating temperature to -40°C ~ 85°C. The AT93C46D-PU supports wider voltage range (1.8V ~ 5.5V) and identical extended temperature range.

Parameter Comparison

Engineering Selection Recommendations

93LC46A-I/P Selection: This part is a direct functional equivalent to the 93LC46A/P. Both devices share identical Microwire interface protocol, memory organization, clock frequency, and supply voltage specifications. The 93LC46A-I/P extends the operating temperature range to -40°C ~ 85°C, providing broader environmental compatibility. Both parts maintain ROHS3 compliance and active product status. Selection of 93LC46A-I/P is appropriate for applications requiring extended temperature operation or when the original part becomes unavailable.

AT93C46D-PU Selection: This part shares identical memory capacity, package configuration, and clock frequency with the 93LC46A/P. However, the AT93C46D-PU implements 3-Wire Serial interface protocol rather than Microwire. This interface difference requires circuit redesign and firmware modification. The AT93C46D-PU offers extended voltage range (1.8V ~ 5.5V) and reduced write cycle time (5ms). Selection is appropriate only when circuit architecture supports 3-Wire Serial protocol or when low-voltage operation (1.8V) is required. ROHS3 compliance and active product status are maintained.

Frequently Asked Questions (FAQ)

Q: Can 93LC46A-I/P directly replace 93LC46A/P without circuit modification?

A: Yes. Both parts implement identical Microwire serial interface protocol, memory capacity, and electrical specifications. The 93LC46A-I/P operates across an extended temperature range (-40°C ~ 85°C) compared to the original part (0°C ~ 70°C). Pin configuration and package dimensions are identical, enabling direct substitution in through-hole applications.

Q: What is the primary difference between 93LC46A-I/P and AT93C46D-PU?

A: The interface protocol differs. The 93LC46A-I/P uses Microwire serial interface, while the AT93C46D-PU uses 3-Wire Serial interface. These protocols are not compatible at the circuit level. Direct substitution requires circuit redesign and firmware modification to accommodate the different serial communication protocol.

Q: Can AT93C46D-PU be used in applications requiring 2.5V minimum supply voltage?

A: Yes. The AT93C46D-PU supports supply voltage range from 1.8V to 5.5V, which encompasses the 2.5V minimum requirement. The part provides additional flexibility for low-voltage applications below 2.5V where the 93LC46A/P cannot operate.

Q: Are all three parts ROHS3 compliant?

A: Yes. The 93LC46A/P, 93LC46A-I/P, and AT93C46D-PU all maintain ROHS3 compliance status with Moisture Sensitivity Level 1 (Unlimited).

Q: What is the package compatibility across these three parts?

A: All three parts use identical 8-DIP through-hole package configuration (0.300", 7.62mm). Physical footprint and pin spacing are compatible for PCB assembly without layout modification.