93LC46BT/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC46BT/ST is a 1Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, designed for non-volatile data storage applications requiring Microwire serial interface communication. This device operates across a 2.5V to 5.5V supply voltage range and is housed in an 8-TSSOP surface mount package. The part is currently in active production status with verified programmability through DiGi-Electronics. Alternative equivalent parts may be required due to packaging availability, extended temperature range requirements, or supply chain considerations.

Substiute Parts

93LC46BT/ST

Microchip TechnologyIn Stock: 604493LC46BT/ST Datasheet

Current PartRFQ

93LC46BT-I/ST

Microchip TechnologyIn Stock: 137193LC46BT-I/ST Datasheet

MFR RecommendedRFQ

BR93L46RFV-WE2

Rohm SemiconductorIn Stock: 2895BR93L46RFV-WE2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Equivalent substitution for the 93LC46BT/ST is determined by strict alignment of the following electrical and mechanical parameters: 1Kbit memory capacity, 64 x 16 memory organization, Microwire serial interface protocol, 2 MHz clock frequency operation, and 8-pin TSSOP/SSOP package configuration. Substitute parts must maintain identical memory specifications and interface compatibility to ensure functional equivalence in circuit applications.

The following substitute parts meet these core substitution criteria:

93LC46BT-I/ST (Microchip Technology) — Manufacturer-recommended equivalent with identical electrical specifications and package type, differentiated by extended operating temperature range (-40°C to 85°C) and alternative packaging format (Cut Tape & Digi-Reel).

BR93L46RFV-WE2 (Rohm Semiconductor) — Cross-manufacturer equivalent with matching memory capacity, organization, and Microwire interface. Operates across extended supply voltage range (1.8V ~ 5.5V) and temperature range (-40°C to 85°C). Package variant is 8-LSSOP with equivalent 0.173" width and 4.40mm pitch. Product status is Not For New Designs.

Parameter Comparison

Engineering Selection Recommendations

93LC46BT-I/ST is the primary equivalent substitute for the 93LC46BT/ST. Both parts are manufactured by Microchip Technology and maintain active product status. The 93LC46BT-I/ST provides extended operating temperature range (-40°C to 85°C) compared to the base part (0°C to 70°C), making it suitable for industrial and automotive applications requiring wider temperature performance. Electrical specifications, memory capacity, interface protocol, and package dimensions are identical. This part is recommended for applications where extended temperature operation or alternative packaging formats (Cut Tape & Digi-Reel) are required.

BR93L46RFV-WE2 is a cross-manufacturer equivalent from Rohm Semiconductor. This part maintains identical memory specifications and Microwire interface compatibility. The BR93L46RFV-WE2 offers extended supply voltage range (1.8V minimum versus 2.5V minimum) and extended operating temperature range (-40°C to 85°C). However, this part carries a "Not For New Designs" product status designation, indicating it is in mature or declining production phase. The 8-LSSOP package is mechanically compatible with equivalent pin pitch and width specifications. This part is suitable only for legacy system maintenance or replacement applications where new design qualification is not required.

Frequently Asked Questions (FAQ)

Q: Can 93LC46BT-I/ST be used as a direct replacement for 93LC46BT/ST?

A: Yes. Both parts are manufactured by Microchip Technology with identical memory capacity (1Kbit), organization (64 x 16), Microwire interface, clock frequency (2 MHz), and 8-TSSOP package configuration. The 93LC46BT-I/ST provides extended operating temperature range (-40°C to 85°C versus 0°C to 70°C). Electrical and functional compatibility is complete.

Q: What are the differences between 93LC46BT/ST and BR93L46RFV-WE2?

A: Both parts share identical 1Kbit memory capacity, 64 x 16 organization, Microwire interface, and 2 MHz clock frequency. Differences include: manufacturer (Microchip versus Rohm), package variant (8-TSSOP versus 8-LSSOP), write cycle time (6ms versus 5ms), supply voltage range (2.5V-5.5V versus 1.8V-5.5V), and product status (Active versus Not For New Designs). Pin pitch and package width are equivalent.

Q: Is BR93L46RFV-WE2 suitable for new product designs?

A: No. The BR93L46RFV-WE2 carries a "Not For New Designs" product status designation. This part is appropriate only for legacy system maintenance, repair, or replacement applications. For new designs, use 93LC46BT/ST or 93LC46BT-I/ST.

Q: Are there package compatibility concerns when substituting between 8-TSSOP and 8-LSSOP variants?

A: The 8-TSSOP and 8-LSSOP packages maintain equivalent pin pitch (0.173" width, 4.40mm pitch) and are mechanically compatible for PCB footprint purposes. Pin assignments and functional interface are identical across both package types.

Q: What is the minimum supply voltage requirement for each part?

A: 93LC46BT/ST and 93LC46BT-I/ST require minimum 2.5V supply voltage. BR93L46RFV-WE2 operates at minimum 1.8V supply voltage, providing extended low-voltage capability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All three parts (93LC46BT/ST, 93LC46BT-I/ST, and BR93L46RFV-WE2) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).