93C46CT-E/SN EEPROM Equivalent & Substitute Parts

Part Overview

The 93C46CT-E/SN is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and 8-SOIC surface mount packaging. This non-volatile memory device operates at 3 MHz clock frequency with a 4.5V to 5.5V supply voltage range and supports industrial temperature range (-40°C to 125°C). The part is ROHS3 compliant and carries unlimited moisture sensitivity level (MSL 1).

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements permit operation within broader electrical specifications. All substitute parts listed maintain identical memory capacity, interface protocol, and physical packaging while offering alternative voltage ranges, clock frequencies, or temperature ratings.

Substiute Parts

93C46CT-E/SN

Microchip TechnologyIn Stock: 101693C46CT-E/SN Datasheet

Current PartRFQ

93LC46CT-E/SN

Microchip TechnologyIn Stock: 397993LC46CT-E/SN 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 eligibility is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Memory Size: 1Kbit (all substitutes)
• Memory Interface: Microwire (all substitutes)
• Package / Case: 8-SOIC (all substitutes)
• Mounting Type: Surface Mount (all substitutes)

Variable Parameters Affecting Substitution:

• Voltage Supply Range: The 93C46CT-E/SN requires 4.5V ~ 5.5V. Substitutes with broader ranges (2.5V ~ 5.5V or 1.8V ~ 5.5V) are compatible in applications using 4.5V ~ 5.5V supplies.
• Clock Frequency: The 93C46CT-E/SN operates at 3 MHz. Substitutes operating at 2 MHz are compatible in applications where lower clock speeds are acceptable.
• Write Cycle Time: Variations from 2ms to 6ms are acceptable depending on application timing requirements.
• Operating Temperature: The 93C46CT-E/SN supports -40°C ~ 125°C. Substitutes with -40°C ~ 85°C range are compatible only in applications not exceeding 85°C.

All listed substitutes maintain identical memory capacity, organization, and Microwire interface protocol, ensuring functional compatibility at the system level.

Parameter Comparison

Engineering Selection Recommendations

93LC46CT-E/SN (Microchip Technology): Direct functional equivalent with identical 3 MHz clock frequency and -40°C to 125°C temperature range. Supports broader voltage range (2.5V ~ 5.5V) and longer write cycle time (6ms). Suitable for applications where lower supply voltage operation is beneficial. ROHS3 compliant with unlimited MSL.

CAV93C46VE-GT3 (onsemi): AEC-Q100 automotive qualified device with 2 MHz clock frequency and 2.5V ~ 5.5V voltage range. Maintains full industrial temperature range (-40°C ~ 125°C). Recommended for automotive and mission-critical applications requiring automotive-grade qualification. ROHS3 compliant.

M93C46-RMN3TP/K (STMicroelectronics): AEC-Q100 automotive qualified with widest voltage range (1.8V ~ 5.5V) and full industrial temperature support (-40°C ~ 125°C). Operates at 2 MHz with 5ms write cycle time. Suitable for low-voltage applications and automotive environments. Cut Tape & Digi-Reel packaging. ROHS3 compliant.

M93C46-WMN6P (STMicroelectronics): Standard industrial grade with 2.5V ~ 5.5V voltage range and 2 MHz operation. Temperature range limited to -40°C ~ 85°C. Suitable for consumer and industrial applications not requiring extended high-temperature operation. Tube packaging. ROHS3 compliant.

M93C46-WMN6TP (STMicroelectronics): Identical electrical specifications to M93C46-WMN6P with verified DiGi-Electronics programmability. 2.5V ~ 5.5V voltage range, 2 MHz clock frequency, -40°C ~ 85°C temperature range. Highest inventory availability (61,180 pcs). Cut Tape & Digi-Reel packaging. ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can I use a 2 MHz substitute in place of the 3 MHz 93C46CT-E/SN?

A: Yes, if your application timing permits. Lower clock frequency does not prevent functionality; it only reduces maximum data transfer rate. Verify that your system design does not require the 3 MHz speed specification.

Q: What is the difference between the 93C46CT-E/SN and 93LC46CT-E/SN?

A: Both are Microchip 1Kbit Microwire EEPROM devices in 8-SOIC packaging. The 93LC46CT-E/SN supports lower supply voltages (2.5V minimum vs. 4.5V minimum) and has a longer write cycle time (6ms vs. 2ms). The 93C46CT-E/SN is preferred for 5V-only systems requiring faster write operations.

Q: Are automotive-qualified substitutes compatible with industrial applications?

A: Yes. AEC-Q100 automotive qualification (CAV93C46VE-GT3, M93C46-RMN3TP/K) indicates higher reliability standards and stricter testing. These parts are fully compatible with industrial applications and offer enhanced reliability margins.

Q: What is the impact of different write cycle times?

A: Write cycle time (2ms to 6ms) affects the duration required to complete a single word or page write operation. Longer write times do not prevent functionality but may impact system throughput in write-intensive applications. Verify your application's write frequency requirements.

Q: Can I use M93C46-WMN6P or M93C46-WMN6TP in applications requiring -40°C ~ 125°C operation?

A: No. These parts are rated only to 85°C maximum. Use 93LC46CT-E/SN, CAV93C46VE-GT3, or M93C46-RMN3TP/K for full -40°C ~ 125°C industrial temperature range applications.

Q: What is the difference between Cut Tape & Digi-Reel and Tube packaging?

A: Both are standard packaging formats for surface mount components. Cut Tape & Digi-Reel is suitable for automated pick-and-place assembly. Tube packaging is typically used for manual assembly or lower-volume applications. Electrical performance is identical.

Q: Is M93C46-WMN6TP verified for DiGi-Electronics programmability?

A: Yes. M93C46-WMN6TP carries verified DiGi-Electronics programmability status, indicating compatibility with DiGi-Electronics programming services if required.

Q: Which substitute offers the lowest minimum supply voltage?

A: M93C46-RMN3TP/K supports operation down to 1.8V minimum supply voltage, making it suitable for low-voltage applications. All other substitutes require minimum 2.5V supply voltage.