Microchip 11LC161T-I/TT EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The Microchip 11LC161T-I/TT is a 16Kbit single-wire EEPROM memory IC in SOT-23-3 surface mount packaging. This non-volatile memory device operates at 100 kHz clock frequency with a 5ms write cycle time and supports supply voltages from 2.5V to 5.5V across an operating temperature range of -40°C to 85°C. The part is active in production status and ROHS3 compliant. Equivalent and substitute parts are identified based on matching memory capacity, interface type, package configuration, and electrical specifications to ensure direct functional replacement in circuit designs.

Key Parameters

Parameter	Specification
Memory Type	Non-Volatile EEPROM
Memory Size	16Kbit
Memory Organization	2K x 8
Memory Interface	Single Wire
Clock Frequency	100 kHz
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	SOT-23-3 (TO-236-3, SC-59)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 11LC161T-I/TT are qualified based on the following critical parameters:

Memory Specifications: All substitute parts maintain 16Kbit capacity with 2K x 8 organization and single-wire interface operation at 100 kHz clock frequency with 5ms write cycle time.

Package Compatibility: All substitutes use SOT-23-3 surface mount packaging, ensuring mechanical and electrical compatibility with existing PCB layouts.

Voltage Supply Range: The 11LC161T-I/TT operates at 2.5V ~ 5.5V. Substitute parts 11AA160T-I/TT and 11AA161T-I/TT support an extended range of 1.8V ~ 5.5V, providing broader voltage compatibility. The 11LC160T-I/TT maintains the same 2.5V ~ 5.5V range as the main part.

Operating Temperature: All parts operate across -40°C ~ 85°C, ensuring thermal compatibility.

Compliance & Certifications: All parts are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited moisture sensitivity level).

Parameter Comparison

Parameter	11LC161T-I/TT (Main)	11AA160T-I/TT	11AA161T-I/TT	11LC160T-I/TT
Memory Size	16Kbit	16Kbit	16Kbit	16Kbit
Memory Organization	2K x 8	2K x 8	2K x 8	2K x 8
Memory Interface	Single Wire	Single Wire	Single Wire	Single Wire
Clock Frequency	100 kHz	100 kHz	100 kHz	100 kHz
Write Cycle Time	5ms	5ms	5ms	5ms
Voltage Supply Range	2.5V ~ 5.5V	1.8V ~ 5.5V	1.8V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	SOT-23-3	SOT-23-3	SOT-23-3	SOT-23-3
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts are manufactured by Microchip Technology and maintain active production status. Selection between the main part and substitutes is determined by voltage supply requirements and packaging format availability.

For applications requiring operation below 2.5V, the 11AA160T-I/TT and 11AA161T-I/TT are suitable substitutes due to their extended 1.8V ~ 5.5V supply range. Both parts are ROHS3 compliant and carry unlimited MSL rating, meeting the same environmental and regulatory requirements as the main part.

For applications with supply voltage constraints at 2.5V or above, the 11LC160T-I/TT provides direct substitution with identical voltage specifications and compliance certifications.

Packaging format differences (Tape & Reel versus Cut Tape & Digi-Reel) do not affect electrical or mechanical compatibility and are determined by procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can the 11AA160T-I/TT replace the 11LC161T-I/TT in all applications?

A: The 11AA160T-I/TT is electrically compatible for applications operating at 2.5V or above. The extended 1.8V ~ 5.5V supply range of the 11AA160T-I/TT provides additional flexibility for lower voltage designs. Both parts share identical memory capacity, organization, interface type, clock frequency, write cycle time, package configuration, and compliance certifications.

Q: What is the difference between the 11AA160T-I/TT and 11AA161T-I/TT?

A: Both parts are functionally equivalent with identical electrical specifications, memory organization, and package configuration. The difference lies in packaging format: 11AA160T-I/TT is supplied in Cut Tape & Digi-Reel format, while 11AA161T-I/TT is supplied in Tape & Reel format. Selection is based on assembly process requirements and procurement preferences.

Q: Is the 11LC160T-I/TT a direct substitute for the 11LC161T-I/TT?

A: Yes, the 11LC160T-I/TT is a direct substitute with matching voltage supply range (2.5V ~ 5.5V), memory specifications, clock frequency, write cycle time, SOT-23-3 package configuration, and compliance certifications. Both parts are suitable for identical circuit applications.

Q: Do all substitute parts support the same operating temperature range?

A: Yes, all substitute parts operate across -40°C ~ 85°C, matching the main part specification.

Q: Are there any compliance or regulatory differences between the main part and substitutes?

A: No. All parts are ROHS3 compliant, REACH unaffected, carry MSL rating 1 (unlimited), and share identical ECCN (EAR99) and HTSUS (8542.32.0051) classifications.

Q: What packaging formats are available for these parts?

A: The 11LC161T-I/TT and 11LC160T-I/TT are supplied in Tape & Reel (TR) format. The 11AA160T-I/TT is supplied in Cut Tape (CT) & Digi-Reel format. The 11AA161T-I/TT is supplied in Tape & Reel (TR) format. Packaging format does not affect electrical or mechanical compatibility.

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