AT24MAC402-SSHM-T

Memory IC Overview

The AT24MAC402-SSHM-T is a 2-Kbit (256 x 8) serial EEPROM manufactured by Microchip Technology. It features an I2C-compatible 2-wire interface with a maximum clock frequency of 1 MHz at 2.5V and 5.0V, and 400 kHz at 1.7V. The device operates within a supply voltage range of 1.7V to 5.5V and supports access times up to 550 ns. It includes factory-programmed read-only EUI-48 addresses and 128-bit serial numbers in an extended memory block. The component is housed in an 8-lead SOIC package and functions across temperatures from -40°C to +85°C.

Memory IC Feature Summary

• Integrates globally unique, factory-programmed EUI-48 addresses and 128-bit serial numbers in a dedicated read-only extended memory area.
• Provides flexible data protection through hardware write protection via the WP pin and both permanent and reversible software write protection for the first-half of the array.
• Supports bidirectional data transfer protocols with Schmitt trigger filtered inputs for noise suppression on the I2C bus.

Memory IC Applications

• Embedded systems requiring unique hardware device identification or node addressing.
• Industrial and commercial applications necessitating low-power and low-voltage operations.
• Firmware binding and production line tracking utilizing guaranteed unique serial numbers.

Memory IC Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type, as the AT24MAC402 series is available in multiple form factors including SOIC, TSSOP, UDFN, and SOT23. Confirm that the application environment remains within the specified operating temperature range and voltage limits to ensure reliable performance and adherence to RoHS compliance standards.

Memory IC Selection Notes

Select this component when a single device must provide both standard non-volatile storage and immutable hardware identity. The AT24MAC402 is distinct from the AT24MAC602, which supports EUI-64 addresses; choose the MAC402 specifically for EUI-48 compatibility. Ensure the design accommodates the separate I2C addressing sequences required to access the standard EEPROM array versus the extended memory blocks containing the unique identifiers.

Memory IC Part Context

This part belongs to the AT24MAC family of Serial EEPROMs designed by Microchip Technology (formerly Atmel). These devices combine standard electrically erasable programmable read-only memory capabilities with embedded identity management features. The family simplifies hardware design by eliminating the need for external components to store unique MAC addresses or serial numbers.

Memory IC Replacement Considerations

AT24MAC602-SSHM-T