24LC65/P

Memory IC Overview

The Microchip Technology 24LC65/P is a 64K-bit (8K x 8) serial EEPROM utilizing an I2C interface. It operates within a voltage range of 2.5V to 6.0V and supports clock frequencies up to 400 kHz with a typical access time of 900 ns. The device features a 64-byte input cache for efficient page writes, high endurance blocks rated for 10 million cycles, and standard array endurance of 1 million cycles. Data retention exceeds 200 years. It is housed in an 8-pin PDIP package and functions within a commercial temperature range of 0°C to +70°C.

Memory IC Feature Summary

• Supports industry-standard two-wire I2C bus protocol with programmable chip select addresses for multi-device expansion.
• Includes a 64-byte input cache to enable fast sequential write loads without interrupting the bus during internal programming cycles.
• Features a relocatable high-endurance memory block capable of 10 million erase/write cycles for frequently changing data.

Memory IC Applications

• Low-power nonvolatile code and data storage in personal communication devices
• Industrial systems requiring reliable data logging with high endurance capabilities
• Embedded controllers needing secure configuration storage with programmable write protection

Memory IC Procurement Notes

Verify that the ordering suffix '/P' corresponds to the 8-pin PDIP package rather than surface mount variants like '/SM'. Confirm the specific temperature grade matches the application requirements, as the 'LC' series typically denotes commercial range (0°C to +70°C). Ensure compatibility with the system's I2C pull-up resistor values for the desired clock speed.

Memory IC Selection Notes

Select this component when a 64K-bit capacity is required with robust endurance characteristics for critical data segments. The 24LC65/P is suitable for designs operating between 2.5V and 6.0V where through-hole mounting is preferred. Consider the security options if write protection for specific memory blocks is necessary to prevent inadvertent data corruption.

Memory IC Part Context

This part belongs to the 24XX65 family, which includes the 24AA65 and 24C65 variants. These devices share identical pinouts and functional architectures but differ in supply voltage ranges and temperature specifications. The 24LC65 specifically targets commercial applications with a wider voltage tolerance compared to some industrial counterparts.

Memory IC Replacement Considerations

Direct substitutes include the 24AA65/P for lower voltage operation down to 1.8V, or the 24C65/P for broader industrial temperature ranges. Verify that any replacement maintains the same PDIP-8 package footprint and I2C addressing scheme to ensure board compatibility.