25AA128-I/SM

Memory IC Overview

The Microchip Technology 25AA128-I/SM is a 128 Kbit (16,384 x 8-bit) Serial Electrically Erasable PROM accessed via an SPI-compatible serial bus. It operates within a supply voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 10 MHz at 5.5V. The device features self-timed erase and write cycles with a maximum duration of 5 ms. It includes block write protection for none, 1/4, 1/2, or all of the array, along with built-in power-on/off data protection and a write-protect pin. The component is housed in an 8-lead SOIC package and is rated for industrial temperature operation from -40°C to +85°C.

Memory IC Feature Summary

• Supports high-speed SPI communication with a maximum clock frequency of 10 MHz.
• Features low-power CMOS technology with standby current as low as 5 µA.
• Includes hardware write protection capabilities via the WP pin and STATUS register bits.
• Provides high reliability with endurance of 1,000,000 erase/write cycles and data retention exceeding 200 years.

Memory IC Applications

• Data storage in microcontroller systems requiring non-volatile memory
• Industrial control applications operating within industrial temperature ranges
• Automotive electronics compliant with AEC-Q100 qualification standards

Memory IC Procurement Notes

Verify that the ordering suffix 'SM' corresponds to the 8-lead SOIC package variant. Confirm the 'I' suffix indicates the Industrial temperature grade (-40°C to +85°C). Ensure the specific revision level matches the design requirements, as datasheet revisions may update electrical characteristics or packaging details. Cross-reference the manufacturer part number with official distributor catalogs to confirm availability and compliance status.

Memory IC Selection Notes

Select this component when a 128 Kbit capacity is required with SPI interface compatibility. Choose the 25AA128 over the 25LC128 if operation below 2.5V down to 1.8V is necessary. Consider the 8-lead SOIC package for surface-mount assembly needs. Verify that the industrial temperature range meets the environmental constraints of the target application.

Memory IC Part Context

This part belongs to the 25XX128 family of Serial EEPROMs from Microchip Technology. It shares functional similarities with the 25LC128 but differs in minimum supply voltage specifications. The family offers various package options including DFN, PDIP, SOIC, SOIJ, and TSSOP. The 25AA128 variant is specifically designed for lower voltage applications compared to its 2.5V minimum counterpart.

Memory IC Replacement Considerations

The 25LC128-I/SM is a functionally similar alternative within the same family, though it requires a minimum supply voltage of 2.5V instead of 1.8V. Other 25XX128 variants with different package suffixes may serve as physical replacements if pin compatibility is maintained.