93LC56C-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC56C-E/ST is a 2Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol. This device is designed for applications requiring persistent data storage with low power consumption and high reliability across industrial temperature ranges. The part is currently in active production status with 757 units available in stock.

Substitute parts are necessary when the original manufacturer's stock is depleted, when alternative packaging formats are required for supply chain optimization, or when enhanced specifications such as extended voltage ranges or automotive-grade qualifications provide additional design margin for specific applications.

Substiute Parts

93LC56C-E/ST

Microchip TechnologyIn Stock: 78193LC56C-E/ST Datasheet

Current PartRFQ

M93C56-RDW3TP/K

STMicroelectronicsIn Stock: 4987M93C56-RDW3TP/K Datasheet

MFR RecommendedRFQ

M93C56-WDW6TP

STMicroelectronicsIn Stock: 52359M93C56-WDW6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93LC56C-E/ST is determined by strict equivalence across the following critical parameters:

• Memory Capacity & Organization: Must be 2Kbit with 256 x 8 or 128 x 16 organization
• Serial Interface Protocol: Must support Microwire interface for direct pin-level compatibility
• Package & Pinout: Must use 8-TSSOP package with identical physical dimensions and pin assignments
• Supply Voltage Compatibility: Substitute must operate within or encompass the 2.5V ~ 5.5V range
• Temperature Range: Substitute must support minimum -40°C ~ 125°C operating window
• RoHS Compliance: Must maintain ROHS3 compliance status

The following parts meet these substitution criteria:

1. M93C56-RDW3TP/K (STMicroelectronics) — Automotive-grade variant with extended voltage range (1.8V ~ 5.5V) and AEC-Q100 qualification
2. M93C56-WDW6TP (STMicroelectronics) — Industrial-grade variant with standard voltage range (2.5V ~ 5.5V) and extended inventory availability

Parameter Comparison

Engineering Selection Recommendations

M93C56-RDW3TP/K Selection Criteria: This substitute is appropriate for applications requiring automotive-grade reliability and extended voltage margin. The AEC-Q100 qualification and 1.8V minimum supply voltage provide enhanced design robustness for automotive and industrial environments. The Tape & Reel packaging format is optimized for high-volume manufacturing processes. This variant is functionally compatible with the 93LC56C-E/ST across all critical parameters while offering superior environmental qualification.

M93C56-WDW6TP Selection Criteria: This substitute provides direct functional equivalence with identical supply voltage specifications (2.5V ~ 5.5V) and maintains full ROHS3 compliance. The Cut Tape & Digi-Reel® packaging format offers flexibility for both prototype and production environments. Significantly higher inventory availability (52,330 units) ensures supply chain continuity. This variant is suitable for standard industrial applications where automotive qualification is not required.

Temperature Range Consideration: The M93C56-WDW6TP operates to 85°C maximum, which is 40°C lower than the original 93LC56C-E/ST specification. Applications requiring full -40°C ~ 125°C operation must use either the original part or the M93C56-RDW3TP/K variant.

Frequently Asked Questions (FAQ)

Q: Can M93C56-RDW3TP/K be used as a direct replacement for 93LC56C-E/ST in all applications? A: Yes, for applications operating within -40°C ~ 125°C. The M93C56-RDW3TP/K meets or exceeds all electrical and mechanical specifications of the original part. The extended voltage range (1.8V ~ 5.5V) provides additional design margin. Pin-level compatibility and Microwire protocol equivalence are confirmed.

Q: What is the primary difference between M93C56-RDW3TP/K and M93C56-WDW6TP? A: The M93C56-RDW3TP/K includes AEC-Q100 automotive qualification and supports extended voltage operation down to 1.8V, with full temperature range to 125°C. The M93C56-WDW6TP is rated to 85°C maximum and maintains standard industrial voltage specifications. Both are functionally equivalent for Microwire EEPROM operations within their respective temperature ranges.

Q: Are there any timing differences that affect circuit design? A: The substitute parts operate at 2 MHz clock frequency versus the original 3 MHz specification. Write cycle time is reduced from 6ms to 5ms. These differences do not affect functional compatibility; circuits designed for the 93LC56C-E/ST will operate correctly with either substitute. The lower clock frequency and faster write cycle provide operational margin.

Q: What packaging format should be selected for production? A: M93C56-RDW3TP/K is supplied in Tape & Reel format, optimized for automated pick-and-place assembly. M93C56-WDW6TP is available in Cut Tape & Digi-Reel® format, suitable for both manual and automated assembly. Selection depends on manufacturing process requirements and volume. Both formats maintain identical component specifications.

Q: Is RoHS compliance maintained across all substitute options? A: Yes. All listed substitutes maintain ROHS3 compliance status, ensuring compatibility with environmental regulations and customer requirements for lead-free manufacturing.