AT24C64C-TH-B

Memory IC Overview

The AT24C64C-TH-B is a 65,536-bit (8192 x 8) serial electrically erasable and programmable read-only memory (EEPROM) manufactured by Microchip Technology. It operates within a supply voltage range of 1.8V to 5.5V and supports clock frequencies up to 1 MHz at 5.0V and 400 kHz at 1.8V. The device utilizes a bidirectional 2-wire serial interface with Schmitt trigger inputs for noise suppression. It features hardware write protection via the WP pin, 32-byte page write capability, and an internally timed write cycle of 5 ms maximum. The component is housed in an 8-lead TSSOP package and is rated for industrial operating temperatures from -40°C to +85°C.

Memory IC Feature Summary

• Supports bidirectional data transfer over a standard 2-wire serial bus with hardware address selection.
• Provides hardware data protection through a dedicated Write Protect pin that inhibits all write operations when asserted high.
• Enables efficient data storage using a 32-byte page write mode with automatic internal address incrementing.

Memory IC Applications

• Industrial control systems requiring non-volatile configuration parameter storage
• Commercial applications needing low-power data retention for device calibration values
• Embedded systems storing user settings or operational status logs

Memory IC Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm package type and lead finish specifications. Ensure the selected variant matches the required voltage range and temperature grade for your application environment. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm current availability and compliance with RoHS standards before finalizing procurement orders.

Memory IC Selection Notes

Select this component when a compact 8-pin surface-mount solution is required for moderate-capacity non-volatile storage. The TSSOP package offers space efficiency compared to PDIP options while maintaining compatibility with standard 2-wire interfaces. Consider the 1.8V operation capability if the system design demands lower power consumption during active read and write cycles.

Memory IC Part Context

This EEPROM belongs to the AT24C32C/64C family, which provides scalable memory densities for embedded applications. The series is designed for use in environments where low power and reliable data retention are critical. It shares common interface protocols and electrical characteristics with other members of the AT24Cxx line, facilitating straightforward integration into existing designs.

Memory IC Replacement Considerations

Compatible replacements include other AT24C64 variants with matching TSSOP packaging and voltage ratings. Verify that substitute parts support the same 2-wire serial protocol and offer equivalent endurance and data retention specifications to ensure functional parity without circuit redesign.

Memory IC FAQ

How does the Write Protect (WP) pin function?

When the WP pin is connected to VCC, all write operations to the memory array are inhibited. Connecting it to GND allows normal write operations to proceed.

What is the maximum page size for write operations?

The device supports a 32-byte page write mode. If more than 32 bytes are transmitted, the address rolls over to the beginning of the same page, potentially overwriting previous data.