Equivalent & Substitute Parts for 93C46AT-E/SN

Part Overview

The 93C46AT-E/SN is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, utilizing Microwire serial interface protocol. This non-volatile memory device operates at 2 MHz clock frequency with a 4.5V to 5.5V supply voltage range and is housed in an 8-SOIC surface mount package. The device is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent memory capacity, interface protocol, package form factor, and operating temperature range are maintained while accommodating variations in supply voltage range and write cycle timing specifications.

Substiute Parts

93C46AT-E/SN

Microchip TechnologyIn Stock: 116193C46AT-E/SN Datasheet

Current PartRFQ

93LC46AT-E/SN

Microchip TechnologyIn Stock: 343893LC46AT-E/SN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93C46AT-E/SN is determined by the following critical parameters:

• Memory capacity and organization (1Kbit, 128 x 8 configuration)
• Serial interface protocol (Microwire)
• Physical package form factor (8-SOIC with identical pin pitch and dimensions)
• Operating temperature range (-40°C to 125°C)
• Surface mount mounting type
• Regulatory compliance (RoHS3, REACH Unaffected)

The 93LC46AT-E/SN qualifies as a direct substitute based on matching all critical parameters. Variations in supply voltage range (2.5V to 5.5V versus 4.5V to 5.5V) and write cycle time (6ms versus 2ms) do not preclude substitution when the application circuit operates within the overlapping voltage window and write timing requirements are compatible with system specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 93C46AT-E/SN and 93LC46AT-E/SN are active production devices with full regulatory compliance. Selection between these parts depends on application-specific requirements:

The 93C46AT-E/SN operates within a 4.5V to 5.5V supply window with a 2ms write cycle time. This part is suitable for applications requiring faster write operations and operating exclusively within the higher voltage range.

The 93LC46AT-E/SN extends the supply voltage range to 2.5V to 5.5V with a 6ms write cycle time. This part accommodates lower voltage system designs and applications where extended write timing is acceptable. The wider voltage specification provides operational flexibility across diverse power supply architectures.

Both devices maintain identical memory capacity, interface protocol, package dimensions, and temperature rating. Substitution is valid when the application circuit operates within the overlapping 4.5V to 5.5V voltage window and write cycle timing requirements are met.

Frequently Asked Questions (FAQ)

Q: Can the 93LC46AT-E/SN replace the 93C46AT-E/SN in all applications?

A: Substitution is valid when the application circuit operates within the 4.5V to 5.5V voltage range and the 6ms write cycle time is compatible with system timing requirements. Applications requiring operation below 4.5V or demanding faster than 6ms write cycles require the original 93C46AT-E/SN specification.

Q: Are the package dimensions identical between these parts?

A: Yes. Both parts use the 8-SOIC package with 0.154" width and 3.90mm dimensions. Pin pitch, lead spacing, and PCB footprint requirements are identical.

Q: What is the primary difference between these two parts?

A: The 93LC46AT-E/SN supports a lower minimum supply voltage (2.5V versus 4.5V) and has a longer write cycle time (6ms versus 2ms). The memory capacity, interface protocol, and all other functional parameters remain identical.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the 93C46AT-E/SN and 93LC46AT-E/SN are ROHS3 compliant with REACH Unaffected status.

Q: What is the Microwire interface protocol?

A: Microwire is a three-wire serial communication protocol consisting of chip select, clock, and data lines. Both parts implement this protocol identically at 2 MHz clock frequency.