93C56BT-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93C56BT-E/ST is a 2Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and operating at 2 MHz clock frequency. This component is designed for applications requiring persistent data storage in a compact 8-TSSOP surface mount package. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

93C56BT-E/ST

Microchip TechnologyIn Stock: 79293C56BT-E/ST Datasheet

Current PartRFQ

93LC56BT-E/ST

Microchip TechnologyIn Stock: 140393LC56BT-E/ST Datasheet

MFR RecommendedRFQ

BR93L56RFVT-WE2

Rohm SemiconductorIn Stock: 1660BR93L56RFVT-WE2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93C56BT-E/ST is determined by strict alignment of the following parameters:

Critical Parameters (Must Match Exactly):

• Memory Size: 2Kbit
• Memory Organization: 128 x 16
• Memory Interface: Microwire
• Clock Frequency: 2 MHz
• Package / Case: 8-TSSOP (0.173", 4.40mm Width)
• Mounting Type: Surface Mount

Allowable Variation Parameters:

• Supply Voltage Range: Substitute may support wider range (lower minimum acceptable)
• Operating Temperature Range: Substitute may support narrower range (within original bounds)
• Write Cycle Time: Variation permitted within functional requirements
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) formats are interchangeable

Two qualified substitute parts meet these criteria: the 93LC56BT-E/ST from Microchip Technology and the BR93L56RFVT-WE2 from Rohm Semiconductor.

Parameter Comparison

Engineering Selection Recommendations

93LC56BT-E/ST (Microchip Technology): This substitute maintains identical electrical and mechanical specifications to the main part with extended supply voltage range (2.5V ~ 5.5V). Both parts are manufactured by Microchip Technology with Active product status and full RoHS3 compliance. The primary difference is write cycle time (6ms versus 2ms), which is acceptable for applications not requiring rapid sequential write operations. This part is available in Cut Tape (CT) and Digi-Reel® packaging formats.

BR93L56RFVT-WE2 (Rohm Semiconductor): This substitute provides the widest supply voltage range (1.8V ~ 5.5V) and is suitable for low-voltage applications. The operating temperature range is narrower (-40°C ~ 85°C) compared to the main part, restricting use in applications requiring operation above 85°C. Write cycle time is 5ms. This part is available in Tape & Reel (TR) packaging format and carries Active product status with full RoHS3 compliance.

Selection between substitutes depends on application-specific requirements: voltage supply constraints, temperature operating range, and write cycle timing tolerance.

Frequently Asked Questions (FAQ)

Q: Can the 93LC56BT-E/ST directly replace the 93C56BT-E/ST in existing designs?

A: Yes. Both parts share identical memory capacity (2Kbit), organization (128 x 16), interface protocol (Microwire), clock frequency (2 MHz), and package specifications (8-TSSOP). The 93LC56BT-E/ST supports a wider supply voltage range (2.5V ~ 5.5V) and identical operating temperature range (-40°C ~ 125°C). Write cycle time differs (6ms versus 2ms), which is acceptable unless the application requires the faster write specification of the original part.

Q: What are the limitations of the BR93L56RFVT-WE2 substitute?

A: The BR93L56RFVT-WE2 operates within a narrower temperature range (-40°C ~ 85°C) compared to the main part (-40°C ~ 125°C). This restriction eliminates its use in high-temperature applications exceeding 85°C. All other electrical and mechanical parameters align with substitution criteria. The part is suitable for standard industrial and commercial temperature environments.

Q: Are packaging format differences between Tape & Reel (TR) and Cut Tape (CT) significant for substitution?

A: No. Tape & Reel (TR) and Cut Tape (CT) formats represent different supply and handling methods for the same component. Both formats contain identical die and package specifications. Selection between formats depends on assembly process requirements and volume considerations, not electrical compatibility.

Q: What parameters must remain identical for a part to qualify as a substitute?

A: Memory size (2Kbit), memory organization (128 x 16), memory interface (Microwire), clock frequency (2 MHz), and physical package specification (8-TSSOP, 0.173", 4.40mm Width) must remain identical. Supply voltage range may be wider, operating temperature range may be narrower (within original bounds), and write cycle time may vary within functional tolerance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both the 93LC56BT-E/ST and BR93L56RFVT-WE2 carry ROHS3 Compliant status, matching the main part specification. All three parts maintain unlimited moisture sensitivity rating (MSL 1).