AT93C86-10SC-2.7 EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT93C86-10SC-2.7 is a 16Kbit EEPROM memory IC manufactured by Microchip Technology, featuring 3-Wire Serial interface with 2 MHz clock frequency in 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The device supports 2K x 8 or 1K x 16 memory organization with 10ms write cycle time and operates across 2.7V to 5.5V supply voltage range at 0°C to 70°C temperature range.

Key Parameters

Parameter	Value
Memory Size	16Kbit
Memory Format	EEPROM
Memory Organization	2K x 8, 1K x 16
Memory Interface	3-Wire Serial / Microwire
Clock Frequency	2 MHz
Write Cycle Time	10ms (AT93C86) / 5ms (Substitutes)
Voltage Supply Range	2.7V ~ 5.5V (Main) / 1.8V ~ 6V (Substitutes)
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant (Main) / ROHS3 Compliant (Substitutes)

Substitute Part Grouping Explanation

Substitution for the AT93C86-10SC-2.7 is determined by the following critical parameters:

Memory Capacity: 16Kbit (fixed requirement)
Memory Format: EEPROM technology
Memory Organization: 2K x 8 or 1K x 16 configuration
Package: 8-SOIC form factor with identical physical dimensions
Interface Compatibility: 3-Wire Serial (AT93C86) or Microwire protocol (functionally compatible for this memory class)
Clock Frequency: Minimum 2 MHz operation
Supply Voltage: Overlap within operating range
Write Cycle Time: 5ms to 10ms acceptable for most applications

The substitute parts listed below meet these core electrical and mechanical requirements while offering improved product status and compliance characteristics.

Parameter Comparison

Parameter	AT93C86-10SC-2.7	93AA86/SN	M93C86-RMN3TP/K	M93C86-WMN6P	M93C86-WMN6TP
Manufacturer	Microchip Technology	Microchip Technology	STMicroelectronics	STMicroelectronics	STMicroelectronics
Memory Size	16Kbit	16Kbit	16Kbit	16Kbit	16Kbit
Memory Organization	2K x 8, 1K x 16	2K x 8, 1K x 16	2K x 8, 1K x 16	2K x 8, 1K x 16	2K x 8, 1K x 16
Memory Interface	3-Wire Serial	Microwire	Microwire	Microwire	Microwire
Clock Frequency	2 MHz	3 MHz	2 MHz	2 MHz	2 MHz
Write Cycle Time	10ms	5ms	5ms	5ms	5ms
Voltage Supply Range	2.7V ~ 5.5V	1.8V ~ 6V	1.8V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Automotive Grade	No	No	Yes (AEC-Q100)	No	No

Engineering Selection Recommendations

For Standard Commercial Applications: The 93AA86/SN from Microchip Technology is the primary substitute, offering active product status, ROHS3 compliance, and identical memory organization. This part maintains Microchip ecosystem compatibility while providing improved write cycle time (5ms vs. 10ms) and extended supply voltage range (1.8V ~ 6V).

For Extended Temperature Range Applications: The M93C86-RMN3TP/K from STMicroelectronics provides automotive-grade qualification (AEC-Q100) with operating temperature range of -40°C to 125°C, suitable for industrial and automotive environments requiring enhanced reliability specifications.

For High-Volume Production: The M93C86-WMN6TP offers the largest available inventory (45,200 pcs) with verified DiGi-Electronics programmability, ROHS3 compliance, and active product status. This part is optimized for production continuity and supply chain stability.

For Flexible Supply Voltage Requirements: The 93AA86/SN supports the widest supply voltage range (1.8V ~ 6V), accommodating both low-power and standard voltage applications within a single part number.

Frequently Asked Questions (FAQ)

Q: Can the AT93C86-10SC-2.7 be directly replaced with 93AA86/SN? A: Yes. Both parts share identical 16Kbit capacity, 2K x 8 / 1K x 16 organization, 8-SOIC packaging, and compatible serial interface protocols. The 93AA86/SN operates at 3 MHz (vs. 2 MHz) and features faster write cycles (5ms vs. 10ms), making it functionally superior. Supply voltage overlap (2.7V ~ 5.5V) ensures compatibility in existing designs.

Q: What is the difference between 3-Wire Serial and Microwire interfaces? A: Both protocols are functionally compatible for 16Kbit EEPROM memory access in this product class. Microwire is an industry-standard serial protocol that encompasses 3-Wire Serial functionality. Substituting AT93C86 (3-Wire Serial) with Microwire-based parts (93AA86, M93C86 series) maintains full compatibility.

Q: Why do substitute parts have faster write cycle times (5ms vs. 10ms)? A: Improved semiconductor manufacturing processes and design optimization in active production parts enable faster write operations. This enhancement is backward-compatible; applications designed for 10ms cycles operate correctly with 5ms write times.

Q: Is the M93C86-RMN3TP/K suitable for automotive applications? A: Yes. The M93C86-RMN3TP/K carries AEC-Q100 automotive qualification and operates across -40°C to 125°C, meeting automotive reliability and temperature requirements. This part is recommended for automotive and industrial applications requiring extended temperature range.

Q: What does ROHS3 compliance mean for this EEPROM? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. The original AT93C86-10SC-2.7 is RoHS non-compliant; all substitute parts are ROHS3 compliant, supporting modern environmental and regulatory requirements.

Q: Can I use M93C86-WMN6TP in place of M93C86-RMN3TP/K? A: Both parts share identical memory specifications and 8-SOIC packaging. The M93C86-RMN3TP/K offers automotive qualification and extended temperature range (-40°C to 125°C), while M93C86-WMN6TP operates -40°C to 85°C without automotive certification. Selection depends on application temperature and qualification requirements.

Q: What inventory considerations should guide part selection? A: M93C86-WMN6TP offers the highest inventory (45,200 pcs), ensuring production continuity. M93C86-RMN3TP/K (12,900 pcs) and M93C86-WMN6P (5,092 pcs) provide automotive-grade and alternative packaging options respectively. 93AA86/SN (938 pcs) maintains Microchip ecosystem compatibility with lower inventory levels.

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