FT93C46A-USR-B Equivalent & Substitute Parts

Part Overview

The FT93C46A-USR-B is a 1Kbit EEPROM memory IC manufactured by Fremont Micro Devices Ltd, featuring a 3-Wire Serial interface operating at 1 MHz. This non-volatile memory device is housed in an 8-SOP package and is actively produced. Substitute parts are identified when equivalent memory capacity, compatible interface protocols, matching package dimensions, and overlapping voltage specifications are available from alternative manufacturers.

Substiute Parts

FT93C46A-USR-B

Fremont Micro Devices LtdIn Stock: 107876FT93C46A-USR-B Datasheet

Current PartRFQ

M93C46-WMN6P

STMicroelectronicsIn Stock: 3499M93C46-WMN6P Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FT93C46A-USR-B is determined by the following criteria:

• Memory Capacity: 1Kbit EEPROM with 128 x 8 or 64 x 16 organization
• Interface Compatibility: 3-Wire Serial or Microwire protocol (both are compatible serial EEPROM interfaces)
• Package Compatibility: 8-SOIC or 8-SOP surface mount packages with matching 0.154" width
• Voltage Range: Supply voltage specification must encompass or overlap with 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C range
• Compliance: ROHS3 compliant, MSL 1 rating

The M93C46-WMN6P meets these criteria through equivalent memory capacity, compatible Microwire serial interface, matching 8-SOIC package dimensions, and overlapping voltage and temperature specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the FT93C46A-USR-B and M93C46-WMN6P are actively produced components with ROHS3 compliance and MSL 1 ratings, making them suitable for equivalent application use. The M93C46-WMN6P offers enhanced performance characteristics including higher clock frequency (2 MHz vs. 1 MHz) and faster write cycle time (5ms vs. 10ms), while maintaining identical memory capacity and package footprint. The M93C46-WMN6P supports a wider supply voltage range (2.5V ~ 5.5V), providing additional design flexibility. Both devices operate across the same temperature range and are housed in mechanically compatible 8-SOIC packages.

Frequently Asked Questions (FAQ)

Q: Can the M93C46-WMN6P directly replace the FT93C46A-USR-B?

A: Yes. Both devices share identical memory capacity (1Kbit), memory organization (128 x 8, 64 x 16), operating temperature range (-40°C ~ 85°C), and package dimensions (8-SOIC, 0.154" width). The 3-Wire Serial and Microwire interfaces are compatible serial EEPROM protocols. Supply voltage ranges overlap at 4.5V ~ 5.5V.

Q: What are the performance differences?

A: The M93C46-WMN6P operates at 2 MHz clock frequency compared to 1 MHz for the FT93C46A-USR-B, and features a 5ms write cycle time versus 10ms. The M93C46-WMN6P also supports a lower minimum supply voltage (2.5V vs. 4.5V).

Q: Are both parts RoHS compliant?

A: Yes. Both the FT93C46A-USR-B and M93C46-WMN6P are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Do the packages have identical pin configurations?

A: Both devices use 8-SOIC packages with matching 0.154" (3.90mm) width. Pin-level compatibility depends on specific application circuit design and interface protocol implementation.

Q: What is the inventory status of substitute parts?

A: The FT93C46A-USR-B has 107,800 pieces in stock. The M93C46-WMN6P has 3,485 pieces in stock.