FT93C46A-UTR-T Equivalent & Substitute Parts

Part Overview

The FT93C46A-UTR-T is a 1Kbit EEPROM memory IC manufactured by Fremont Micro Devices Ltd, featuring a 3-wire serial interface and 8-TSSOP surface mount packaging. This non-volatile memory device operates at 1 MHz clock frequency with a 10ms write cycle time and is designed for applications requiring small-capacity serial EEPROM storage. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent memory capacity, interface type, package form factor, and operating temperature range are maintained, while allowing variations in clock frequency, write cycle time, and supply voltage range that do not compromise system functionality.

Substiute Parts

FT93C46A-UTR-T

Fremont Micro Devices LtdIn Stock: 30314FT93C46A-UTR-T Datasheet

Current PartRFQ

AT93C46D-TH-B

Microchip TechnologyIn Stock: 2367AT93C46D-TH-B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FT93C46A-UTR-T is determined by the following mandatory parameters:

• Memory capacity must equal 1Kbit
• Memory format must be EEPROM with 3-wire serial interface
• Package must be 8-TSSOP with identical physical dimensions (0.173", 4.40mm Width)
• Operating temperature range must encompass -40°C to 85°C
• Mounting type must be surface mount
• RoHS3 compliance must be maintained

Parameters that may vary between the main part and substitutes include clock frequency, write cycle time, supply voltage range, and packaging format (cut tape versus tube), provided these variations do not restrict system-level performance or create incompatibilities with existing designs.

Parameter Comparison

Engineering Selection Recommendations

The AT93C46D-TH-B qualifies as a direct substitute for the FT93C46A-UTR-T based on matching memory capacity, interface protocol, package dimensions, and operating temperature specifications. Both parts maintain RoHS3 compliance and identical 8-TSSOP form factors suitable for surface mount assembly.

The AT93C46D-TH-B offers enhanced performance characteristics: 2 MHz clock frequency (versus 1 MHz) and 5ms write cycle time (versus 10ms), providing faster operation when system timing permits. The expanded supply voltage range (1.8V ~ 5.5V versus 4.5V ~ 5.5V) provides greater flexibility for low-voltage applications.

Selection between these parts should be based on system voltage requirements, timing constraints, and packaging logistics. The AT93C46D-TH-B is suitable for designs requiring faster write operations or operating from lower supply voltages. The FT93C46A-UTR-T remains appropriate for applications with 4.5V minimum supply voltage and standard timing requirements.

Frequently Asked Questions (FAQ)

Q: Can the AT93C46D-TH-B replace the FT93C46A-UTR-T in existing designs?

A: Yes. Both parts share identical memory capacity (1Kbit), 3-wire serial interface, 8-TSSOP package dimensions, and -40°C to 85°C operating temperature range. The AT93C46D-TH-B operates at higher clock frequency and faster write cycle time, which are backward-compatible with designs expecting the FT93C46A-UTR-T.

Q: What is the difference between Cut Tape and Tube packaging?

A: Cut Tape (CT) and Tube are packaging formats for component delivery and handling. Cut Tape provides individual component strips suitable for automated pick-and-place assembly. Tube packaging provides bulk quantities in protective containers. Both formats contain identical die and lead configurations; selection depends on assembly process requirements and inventory management practices.

Q: Does the wider supply voltage range of the AT93C46D-TH-B affect compatibility?

A: No. The AT93C46D-TH-B accepts 1.8V to 5.5V supply voltage, which encompasses the FT93C46A-UTR-T operating range of 4.5V to 5.5V. Designs powered within the 4.5V to 5.5V window operate identically on either part. Designs requiring operation below 4.5V require the AT93C46D-TH-B.

Q: Are there any timing considerations when substituting these parts?

A: The AT93C46D-TH-B operates at 2 MHz clock frequency and 5ms write cycle time, compared to 1 MHz and 10ms for the FT93C46A-UTR-T. These faster specifications are compatible with designs expecting the original part. No timing adjustments are required.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the FT93C46A-UTR-T and AT93C46D-TH-B are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8542.32.0051.