25AA128T-I/ST

Memory IC Overview

The Microchip Technology 25AA128T-I/ST is a 128 Kbit Serial Electrically Erasable PROM featuring a 16,384 x 8-bit organization. It interfaces via an SPI-compatible serial bus with a maximum clock frequency of 10 MHz. The device operates within a supply voltage range of 1.8V to 5.5V and supports industrial temperature ranges from -40°C to +85°C. It utilizes low-power CMOS technology, offering standby current as low as 5 µA at 5.5V. The component includes self-timed erase and write cycles with a maximum duration of 5 ms.

Memory IC Feature Summary

• Supports sequential read operations and page writes up to 64 bytes within a single physical page boundary.
• Includes built-in write protection mechanisms such as power-on/off data protection, a write enable latch, and a dedicated write-protect pin.
• Features block write protection allowing selection to protect none, one-quarter, one-half, or the entire memory array.
• Provides hardware write protection functionality controlled by the WP pin in conjunction with the WPEN bit in the STATUS register.

Memory IC Applications

• Data storage for configuration parameters in microcontroller systems
• Non-volatile memory for storing calibration data in sensor modules
• Code storage for bootloaders in embedded applications

Memory IC Procurement Notes

Verify that the specific ordering suffix 'T' corresponds to the required tape and reel packaging format rather than tube packaging. Confirm the 'I' designation aligns with the necessary industrial temperature operating range for the target environment. Ensure compatibility with the system's SPI interface voltage levels and check for any specific RoHS compliance requirements mandated by the end product regulations.

Memory IC Selection Notes

Select this component when a 128 Kbit capacity is required with SPI interface compatibility. Choose this part over the 25LC128 variant if the application demands operation at supply voltages below 2.5V, specifically down to 1.8V. Consider this device for designs requiring robust hardware write protection features and high endurance specifications suitable for frequent data logging tasks.

Memory IC Part Context

This component belongs to the 25XX128 family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25LC128 but differs primarily in its lower minimum operating voltage specification. The family offers multiple package options including TSSOP, SOIC, and DFN, providing flexibility for various PCB layout constraints and thermal management needs.

Memory IC Replacement Considerations

25LC128T-I/ST