93C46T/SMB21

Memory IC Overview

The Microchip Technology 93C46T/SMB21 is a 1-kbit (64 x 16) Microwire serial EEPROM housed in an SMB-8 surface-mount package. It operates with a supply voltage range of 4.5 V to 5.5 V and supports a maximum clock frequency of 1 MHz. The device features a typical access time of 200 ns and maintains data retention for up to 200 years. It is designed for industrial temperature ranges, typically spanning -40°C to +85°C.

Memory IC Feature Summary

• Supports Microwire 3-wire serial interface for efficient pin usage
• Provides high-density non-volatile storage in a compact surface-mount footprint
• Ensures long-term data integrity with extended retention specifications

Memory IC Applications

• Industrial control systems requiring parameter storage
• Consumer electronics configuration memory
• Automotive sensor calibration data logging

Memory IC Procurement Notes

Verify the specific suffix 'SMB21' against the official Microchip datasheet to confirm package dimensions and tape-and-reel specifications. Ensure compatibility with existing PCB footprints for the SMB-8 package. Confirm that the 1 MHz clock speed meets system timing requirements compared to higher-speed variants like the 93C46B series.

Memory IC Selection Notes

Select this component when a small surface-mount EEPROM is required for low-pin-count applications. The SMB-8 package offers space savings over PDIP options. Verify that the 1 MHz interface speed is sufficient for the application's data throughput needs, as faster alternatives exist within the same family.

Memory IC Part Context

This part belongs to the 93C46A/B/C family of Microwire EEPROMs from Microchip Technology. These devices are widely used for storing calibration data, user settings, and identification codes in embedded systems where non-volatile memory is essential but board space is limited.

Memory IC Replacement Considerations

Direct replacements include other 93C46 variants such as 93C46B or 93C46C if higher clock speeds are acceptable. Ensure the substitute part matches the SMB-8 package or requires adapter solutions. Cross-reference with 93LC46 series for pin-compatible upgrades.