AT93C86-10SC EEPROM 16Kbit 3-Wire Serial Equivalent & Substitute Parts

Part Overview

The AT93C86-10SC is a 16Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, featuring a 3-Wire Serial interface with 2 MHz clock frequency and 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device operates within a 4.5V to 5.5V supply voltage range and supports 2K x 8 or 1K x 16 memory organization with a 10ms write cycle time.

Key Parameters

Parameter	AT93C86-10SC
Memory Size	16Kbit
Memory Format	EEPROM
Memory Organization	2K x 8, 1K x 16
Memory Interface	3-Wire Serial
Clock Frequency	2 MHz
Write Cycle Time	10ms
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

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

Memory capacity: 16Kbit
Memory format: EEPROM non-volatile storage
Package type: 8-SOIC surface mount with identical 0.154" width
Memory organization: 2K x 8 or 1K x 16 configuration
Interface protocol: 3-Wire Serial or Microwire (compatible serial protocols)
Clock frequency: 2 MHz or higher
Write cycle time: 10ms or faster
Supply voltage compatibility: Minimum 4.5V support

Substitute parts are grouped into two categories based on interface compatibility and product status:

Category 1: Active Microchip Technology Parts (Microwire Interface)

93AA86/SN: Active product with Microwire interface, 3 MHz clock, 5ms write cycle, 1.8V ~ 6V supply range
Provides superior performance characteristics and RoHS3 compliance

Category 2: Active STMicroelectronics Parts (Microwire Interface)

M93C86-RMN3TP/K: Automotive-grade with AEC-Q100 qualification, -40°C ~ 125°C operating range, 2 MHz clock
M93C86-WMN6P: Industrial-grade, -40°C ~ 85°C operating range, 2.5V ~ 5.5V supply
M93C86-WMN6TP: Industrial-grade, -40°C ~ 85°C operating range, 2.5V ~ 5.5V supply, highest inventory availability

All substitute parts maintain 16Kbit capacity, 2K x 8 / 1K x 16 organization, and 8-SOIC packaging. Interface migration from 3-Wire Serial to Microwire requires protocol-level firmware or hardware adaptation.

Parameter Comparison

Parameter	AT93C86-10SC	93AA86/SN	M93C86-RMN3TP/K	M93C86-WMN6P	M93C86-WMN6TP
Memory Size	16Kbit	16Kbit	16Kbit	16Kbit	16Kbit
Memory Format	EEPROM	EEPROM	EEPROM	EEPROM	EEPROM
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	4.5V ~ 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
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	709 Pcs	938 Pcs	12900 Pcs	5092 Pcs	45200 Pcs

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: All substitute parts (93AA86/SN, M93C86-RMN3TP/K, M93C86-WMN6P, M93C86-WMN6TP) are ROHS3 compliant, whereas the AT93C86-10SC is RoHS non-compliant. Selection of any substitute part satisfies modern environmental and regulatory compliance mandates.

For Automotive Applications: M93C86-RMN3TP/K is the only substitute part with AEC-Q100 qualification and automotive-grade designation. This part supports extended operating temperature range (-40°C ~ 125°C) and is suitable for automotive embedded systems requiring reliability certification.

For Industrial and Commercial Applications: M93C86-WMN6TP offers the highest inventory availability (45200 Pcs) with verified DiGi-Electronics programmability, industrial temperature range (-40°C ~ 85°C), and active product status. This part is optimal for high-volume production requiring supply chain stability.

For Extended Supply Voltage Range: 93AA86/SN supports the widest supply voltage range (1.8V ~ 6V) and offers the fastest write cycle time (5ms). This part is suitable for applications requiring low-voltage operation or battery-powered systems.

Interface Protocol Consideration: All substitute parts use Microwire interface instead of the original 3-Wire Serial interface. Design migration requires protocol-level adaptation in firmware or hardware interface circuitry. Microwire is a compatible serial protocol but requires interface controller modification.

Frequently Asked Questions (FAQ)

Q: Can I directly replace AT93C86-10SC with any of the substitute parts without circuit modification?

A: Direct pin-compatible replacement is possible due to identical 8-SOIC packaging. However, the interface protocol differs: AT93C86-10SC uses 3-Wire Serial while all substitutes use Microwire. Circuit-level interface adaptation is required for proper operation.

Q: What is the difference between 3-Wire Serial and Microwire interfaces?

A: Both are serial communication protocols for EEPROM devices. 3-Wire Serial and Microwire differ in signal timing, command structure, and protocol sequencing. Firmware or hardware interface logic must be updated to support the Microwire protocol used by substitute parts.

Q: Which substitute part offers the best performance improvement?

A: 93AA86/SN provides the fastest write cycle time (5ms versus 10ms) and highest clock frequency (3 MHz versus 2 MHz). M93C86-RMN3TP/K and M93C86-WMN6TP both offer 5ms write cycle time with extended temperature ranges compared to the original part.

Q: Are all substitute parts RoHS compliant?

A: Yes. All four substitute parts (93AA86/SN, M93C86-RMN3TP/K, M93C86-WMN6P, M93C86-WMN6TP) are ROHS3 compliant. The original AT93C86-10SC is RoHS non-compliant.

Q: Which substitute part has the best supply availability?

A: M93C86-WMN6TP has the highest inventory (45200 Pcs) with verified programmability status and active product classification, providing optimal supply chain reliability for production environments.

Q: Can I use M93C86-RMN3TP/K in non-automotive applications?

A: Yes. M93C86-RMN3TP/K is automotive-qualified but can be used in any application. Its extended temperature range (-40°C ~ 125°C) and AEC-Q100 certification provide additional reliability margins suitable for demanding industrial or commercial environments.

Q: What is the voltage compatibility range for each substitute?

A: 93AA86/SN: 1.8V ~ 6V; M93C86-RMN3TP/K: 1.8V ~ 5.5V; M93C86-WMN6P: 2.5V ~ 5.5V; M93C86-WMN6TP: 2.5V ~ 5.5V. All support the original 4.5V ~ 5.5V range of AT93C86-10SC.

Q: Is firmware modification required for substitution?

A: Yes. Interface protocol migration from 3-Wire Serial to Microwire requires firmware modification to support the different command structure and timing requirements of the Microwire protocol.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message