93C86CT-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93C86CT-I/ST is a 16Kbit non-volatile EEPROM memory integrated circuit manufactured by Microchip Technology. This device operates using the Microwire serial interface protocol and is housed in an 8-TSSOP surface mount package. The part is currently active in production and RoHS3 compliant.

Substitute parts are necessary when the original 93C86CT-I/ST becomes unavailable due to supply constraints, when alternative packaging formats are required, or when design specifications permit operation within the extended parameter ranges offered by equivalent devices. Substitution must maintain compatibility across memory capacity, interface protocol, package form factor, and electrical operating characteristics.

Substiute Parts

93C86CT-I/ST

Microchip TechnologyIn Stock: 81893C86CT-I/ST Datasheet

Current PartRFQ

93C86C-I/ST

Microchip TechnologyIn Stock: 167493C86C-I/ST Datasheet

DirectRFQ

93LC86CT-I/ST

Microchip TechnologyIn Stock: 406393LC86CT-I/ST Datasheet

MFR RecommendedRFQ

AT93C86A-10TU-1.8

Microchip TechnologyIn Stock: 5408AT93C86A-10TU-1.8 Datasheet

MFR RecommendedRFQ

AT93C86A-10TU-2.7

Microchip TechnologyIn Stock: 20362AT93C86A-10TU-2.7 Datasheet

MFR RecommendedRFQ

CAV93C86YE-GT3

onsemiIn Stock: 4172CAV93C86YE-GT3 Datasheet

MFR RecommendedRFQ

M93C86-WDW6TP

STMicroelectronicsIn Stock: 3774M93C86-WDW6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 93C86CT-I/ST is determined by the following critical parameters:

Primary Compatibility Criteria:

• Memory capacity must equal 16Kbit
• Memory organization must support 2K x 8 or 1K x 16 configuration
• Package must be 8-TSSOP form factor
• Mounting type must be surface mount
• Operating temperature range must encompass -40°C to 85°C minimum

Interface Protocol Compatibility: Substitute parts are grouped into two interface categories:

1. Microwire Interface - Direct functional equivalents with identical serial protocol
2. 3-Wire Serial Interface - Alternative serial protocol with different timing characteristics

Electrical Operating Range: Substitute parts must operate within the application's supply voltage requirements. The original 93C86CT-I/ST requires 4.5V to 5.5V. Substitutes with wider voltage ranges (2.5V to 5.5V or 1.8V to 5.5V) are compatible when the application supplies voltage within the original specification window.

Compliance and Certification: RoHS3 compliance and REACH unaffected status are maintained across all listed substitutes. Moisture sensitivity level and packaging format variations are noted for assembly process considerations.

Parameter Comparison

Engineering Selection Recommendations

Direct Microwire Interface Substitutes (Highest Compatibility):

The 93LC86CT-I/ST, CAV93C86YE-GT3, and M93C86-WDW6TP maintain the Microwire serial interface protocol identical to the 93C86CT-I/ST. These parts are functionally interchangeable at the protocol level. The 93LC86CT-I/ST is RoHS3 compliant with verified programmability status and operates across an extended supply voltage range of 2.5V to 5.5V. The M93C86-WDW6TP from STMicroelectronics is also RoHS3 compliant with verified programmability and maintains the same voltage range. The CAV93C86YE-GT3 from onsemi is automotive-grade with AEC-Q100 qualification and extends the operating temperature range to 125°C, suitable for high-temperature applications.

Alternative 3-Wire Serial Interface Substitutes:

The AT93C86A-10TU-1.8 and AT93C86A-10TU-2.7 employ a 3-Wire Serial interface protocol rather than Microwire. These parts require firmware or hardware interface modifications and are suitable only when the application design supports protocol conversion or when the 3-Wire Serial interface is acceptable. Both variants are RoHS3 compliant. The AT93C86A-10TU-2.7 has verified programmability status and operates at 2.7V to 5.5V supply voltage. The AT93C86A-10TU-1.8 extends the lower voltage limit to 1.8V for ultra-low-power applications.

Packaging and Compliance Considerations:

The 93C86C-I/ST is supplied in Tube packaging rather than Tape & Reel format. This part is RoHS non-compliant and should be selected only when RoHS compliance is not a design requirement. All other substitutes maintain RoHS3 compliance status.

Programmability Verification:

The 93LC86CT-I/ST and M93C86-WDW6TP carry verified programmability status. The 93C86CT-I/ST, 93C86C-I/ST, AT93C86A-10TU-1.8, and CAV93C86YE-GT3 have not been verified for programmability through DiGi-Electronics testing.

Frequently Asked Questions (FAQ)

Q: Can the 93C86CT-I/ST be replaced with the 93LC86CT-I/ST without circuit modifications?

A: Yes. Both devices use the Microwire serial interface protocol and are housed in identical 8-TSSOP packages. The 93LC86CT-I/ST operates across a wider supply voltage range (2.5V to 5.5V) and is compatible when the application supplies voltage within the original 4.5V to 5.5V specification window. The 93LC86CT-I/ST has a longer write cycle time of 5ms compared to the original 2ms specification.

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

A: Microwire and 3-Wire Serial are distinct serial communication protocols with different timing, signal sequencing, and control requirements. Devices using 3-Wire Serial interface (AT93C86A series) cannot be directly substituted for Microwire devices without modifying the host controller firmware or hardware interface logic.

Q: Is the CAV93C86YE-GT3 suitable for automotive applications?

A: Yes. The CAV93C86YE-GT3 is automotive-grade and carries AEC-Q100 qualification. It operates across an extended temperature range of -40°C to 125°C and maintains Microwire interface compatibility with the 93C86CT-I/ST.

Q: What does Moisture Sensitivity Level 3 mean for the AT93C86A series?

A: Moisture Sensitivity Level 3 indicates the device requires controlled humidity storage conditions of 168 hours maximum at specified temperature and humidity levels before soldering. Level 1 devices (93C86CT-I/ST, 93LC86CT-I/ST, CAV93C86YE-GT3, M93C86-WDW6TP) have unlimited shelf life under normal storage conditions.

Q: Can I use the 93C86C-I/ST as a substitute if RoHS compliance is not required?

A: The 93C86C-I/ST is functionally equivalent to the 93C86CT-I/ST with identical electrical specifications and Microwire interface. The primary difference is RoHS non-compliance status and Tube packaging format instead of Tape & Reel. Selection depends on assembly process requirements and regulatory compliance mandates.

Q: What is the impact of lower clock frequency in substitute parts?

A: The 93C86CT-I/ST operates at 3 MHz clock frequency. Substitute parts operating at 2 MHz (93LC86CT-I/ST, AT93C86A series, CAV93C86YE-GT3, M93C86-WDW6TP) have proportionally longer data transfer times. This affects overall system throughput but does not impact functional compatibility when the application timing budget accommodates the reduced clock speed.

Q: Are all substitute parts available in Tape & Reel packaging?

A: No. The 93C86C-I/ST, AT93C86A-10TU-1.8, and AT93C86A-10TU-2.7 are supplied in Tube packaging. The 93C86CT-I/ST, 93LC86CT-I/ST, CAV93C86YE-GT3, and M93C86-WDW6TP are available in Tape & Reel format suitable for automated assembly processes.

Q: What supply voltage range must I verify before substitution?

A: The original 93C86CT-I/ST requires 4.5V to 5.5V supply voltage. All listed substitutes operate within this range. However, substitutes with extended lower voltage limits (2.5V or 1.8V) are compatible only if the application circuit supplies voltage within the original 4.5V to 5.5V window. Do not assume extended voltage range capability applies to your application without circuit verification.