93LC56BT-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC56BT-I/ST is a 2Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and 8-TSSOP surface mount packaging. This component is actively produced and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same memory capacity, interface protocol, and package form factor.

Key Parameters

Parameter	Specification
Memory Size	2Kbit
Memory Organization	128 x 16
Memory Interface	Microwire
Clock Frequency	2 MHz
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Write Cycle Time	6ms

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence in the following parameters: memory size (2Kbit), memory organization (128 x 16), memory interface protocol (Microwire), package type (8-TSSOP), and mounting method (Surface Mount). Parts are grouped into two categories based on operational compatibility:

Category 1: Direct Electrical Equivalents — Parts maintaining identical clock frequency (2 MHz), voltage supply range (2.5V ~ 5.5V minimum), and operating temperature range (-40°C ~ 85°C). These parts are pin-compatible and functionally interchangeable without circuit modification.

Category 2: Enhanced Performance Variants — Parts with improved specifications including higher clock frequency (3 MHz), extended voltage supply range (1.7V ~ 5.5V or 1.8V ~ 5.5V), or extended operating temperature range (-40°C ~ 125°C). These parts maintain core memory specifications and package compatibility but offer performance enhancements.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Voltage Supply	Operating Temperature	Write Cycle Time	Product Status	Packaging
93LC56BT-I/ST	Microchip Technology	2Kbit	2 MHz	2.5V ~ 5.5V	-40°C ~ 85°C	6ms	Active	Cut Tape & Digi-Reel
93LC56B-I/ST	Microchip Technology	2Kbit	2 MHz	2.5V ~ 5.5V	-40°C ~ 85°C	6ms	Active	Tube
93LC56BT-E/ST	Microchip Technology	2Kbit	2 MHz	2.5V ~ 5.5V	-40°C ~ 125°C	6ms	Active	Cut Tape & Digi-Reel
BR93L56RFVT-WE2	Rohm Semiconductor	2Kbit	2 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	Active	Tape & Reel
BR93G56FVT-3AGE2	Rohm Semiconductor	2Kbit	3 MHz	1.7V ~ 5.5V	-40°C ~ 85°C	5ms	Active	Tape & Reel
BR93G56FVT-3BGE2	ROHM Semiconductor	2Kbit	3 MHz	1.7V ~ 5.5V	-40°C ~ 85°C	5ms	Obsolete	Not Specified

Engineering Selection Recommendations

Primary Substitutes (Active Status, Verified Compatibility):

93LC56B-I/ST and 93LC56BT-E/ST are direct Microchip Technology alternatives maintaining identical electrical specifications to the 93LC56BT-I/ST. Selection between these parts depends on packaging requirements: 93LC56B-I/ST is supplied in Tube packaging, while 93LC56BT-E/ST is supplied in Cut Tape & Digi-Reel format. The 93LC56BT-E/ST offers extended operating temperature range (-40°C ~ 125°C) for applications requiring higher temperature operation.

BR93L56RFVT-WE2 (Rohm Semiconductor) maintains 2 MHz clock frequency and equivalent memory specifications with extended lower voltage supply capability (1.8V minimum). This part is actively produced and verified for DiGi-Electronics programming compatibility.

Secondary Substitutes (Enhanced Performance):

BR93G56FVT-3AGE2 and BR93G56FVT-3BGE2 (Rohm Semiconductor) provide 3 MHz clock frequency operation with extended lower voltage supply range (1.7V minimum). BR93G56FVT-3AGE2 is actively produced. BR93G56FVT-3BGE2 is obsolete and should not be selected for new designs.

Compliance Status:

All active substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical ECCN (EAR99) and HTSUS (8542.32.0051) classifications as the main part.

Frequently Asked Questions (FAQ)

Q: Can 93LC56B-I/ST replace 93LC56BT-I/ST in production?

A: Yes. Both parts are manufactured by Microchip Technology with identical electrical specifications (2Kbit, 2 MHz, 2.5V ~ 5.5V, -40°C ~ 85°C). The difference is packaging format: 93LC56B-I/ST uses Tube packaging while 93LC56BT-I/ST uses Cut Tape & Digi-Reel. Verify packaging compatibility with your assembly process before substitution.

Q: What is the advantage of 93LC56BT-E/ST over 93LC56BT-I/ST?

A: The 93LC56BT-E/ST extends the operating temperature range to -40°C ~ 125°C, enabling use in high-temperature applications. All other electrical parameters remain identical. Select this part only if your application requires operation above 85°C.

Q: Are Rohm Semiconductor parts (BR93L56RFVT-WE2, BR93G56FVT-3AGE2) compatible with circuits designed for 93LC56BT-I/ST?

A: Yes, with voltage supply considerations. Both Rohm parts maintain 2Kbit memory capacity, 128 x 16 organization, Microwire interface, and 8-TSSOP packaging. BR93L56RFVT-WE2 operates at 2 MHz with 1.8V ~ 5.5V supply. BR93G56FVT-3AGE2 operates at 3 MHz with 1.7V ~ 5.5V supply. Verify your circuit's voltage supply range and clock frequency requirements before substitution.

Q: Why is BR93G56FVT-3BGE2 listed as obsolete?

A: BR93G56FVT-3BGE2 has been discontinued by ROHM Semiconductor. For new designs, use BR93G56FVT-3AGE2, which provides equivalent specifications and active production status.

Q: What is the difference between 2 MHz and 3 MHz clock frequency variants?

A: Clock frequency determines maximum data transfer rate. The 3 MHz variants (BR93G56FVT-3AGE2, BR93G56FVT-3BGE2) support faster serial communication than 2 MHz parts. Both are compatible with 8-TSSOP packaging and 2Kbit memory capacity. Select based on your system's clock frequency requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status identical to the main part 93LC56BT-I/ST.

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