24AA01-I/P

Memory IC Overview

The Microchip Technology 24AA01-I/P is a 1 Kbit (128 x 8) Electrically Erasable PROM (EEPROM) featuring a 2-wire I²C compatible serial interface. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports a maximum clock frequency of 400 kHz at voltages above 2.5V, reducing to 100 kHz below that threshold. The device utilizes low-power CMOS technology with standby currents as low as 1 µA and active read currents up to 1 mA. It includes an 8-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. The component is housed in an 8-lead PDIP package and is rated for industrial temperature operation between -40°C and +85°C.

Memory IC Feature Summary

• Supports bidirectional data transmission over a 2-wire serial bus with I²C compatibility.
• Features hardware write protection controlled by the WP pin to inhibit memory writes when tied high.
• Includes an 8-byte page write buffer to optimize data transfer efficiency.
• Integrates Schmitt trigger inputs and filter circuits to suppress noise spikes on the SCL and SDA lines.

Memory IC Applications

• Data logging systems requiring non-volatile storage for sensor readings.
• Configuration storage for microcontroller-based embedded devices.
• Calibration data retention in industrial instrumentation.
• Parameter storage in consumer electronics operating at low voltages.

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the Industrial temperature range (-40°C to +85°C) and 'P' denotes the 8-lead PDIP package. Confirm the voltage range requirement aligns with the 1.7V minimum specification, distinguishing it from variants requiring higher minimum voltages. Ensure the design accounts for the 400 kHz clock limit at VCC ≥ 2.5V and the reduced 100 kHz limit at lower voltages. Check for RoHS compliance status if required by assembly specifications.

Memory IC Selection Notes

Select this component when a 1 Kbit capacity is sufficient and low-voltage operation down to 1.7V is necessary. The 8-lead PDIP package is suitable for through-hole prototyping or applications where surface mount options are not preferred. Consider the 8-byte page write buffer size for write optimization; larger buffers may be needed for higher throughput requirements. Verify that the I²C address coding ('1010') fits within the system's address space constraints.

Memory IC Part Context

The 24AA01 belongs to the 24XX01 family of 1 Kbit serial EEPROMs manufactured by Microchip Technology. This family shares common architectural features such as the 2-wire interface and page write capabilities but differs in voltage ranges and clock speeds across variants like the 24LC01B and 24FC01. The 24AA01 specifically targets applications requiring operation down to 1.7V, unlike the 24LC01B which requires a minimum of 2.5V.

Memory IC Replacement Considerations

The 24LC01B serves as a functional substitute but requires a minimum supply voltage of 2.5V, whereas the 24AA01 supports 1.7V. The 24FC01 offers higher speed compatibility up to 1 MHz but also requires verification against voltage and temperature constraints. Ensure any replacement maintains the 8-lead PDIP package or adapts to the target footprint accordingly.