AT24C1024BN-SH-T: Microchip Technology's High-Performance 1Mb EEPROM IC

The AT24C1024BN-SH-T from Microchip Technology is a 1Mb (128K x 8) serial EEPROM designed for mission-critical data storage applications. This in-depth guide covers its technical specifications, industrial applications, and why it remains relevant despite its obsolete status.

Technical Specifications Deep Dive

Memory Architecture

• Density: 1,048,576 bits organized as 131,072 words x 8 bits
• Page Size: 256-byte page write buffer
• Endurance: 1,000,000 write cycles (typical)
• Data Retention: 100 years at 25 C

Advanced I2C Interface Features

• Supports standard (100kHz) and fast (400kHz) modes plus 1MHz high-speed mode
• Hardware write-protect pin for data security
• 32-byte page write mode for efficient data logging

Enhanced Reliability Features

• Advanced write protection: Power-on reset and VCC monitor
• Noise filtering on SCL/SDA inputs
• Electrostatic discharge (ESD) protection >4,000V

Industry Applications

Automotive Systems

Used in:

• ECU parameter storage
• Odometer data retention
• Infotainment system configurations

Industrial Automation

Critical for:

• PLC program storage
• Sensor calibration data
• Equipment configuration parameters

Medical Equipment

Essential in:

• Patient monitoring devices
• Diagnostic equipment settings
• FDA-compliant data logging

Design Considerations

PCB Layout Recommendations

• Place decoupling capacitors within 5mm of VCC pin
• Keep I2C traces <10cm with proper termination
• Follow IPC-2221 standards for SOIC-8 mounting

Thermal Management

• Derating guidelines for >85 C operation
• Recommended solder reflow profile
• Thermal via placement for high-temp environments

Migration Options

While obsolete, these modern alternatives are available:

• AT24CM01 (1Mb with extended temperature range)
• AT24CS01 (1Mb with serial number feature)
• AT25SF041 (4Mb SPI Flash alternative)

Purchasing Information

Our inventory includes:

• Factory-sealed tape and reel (3,000 units/reel)
• Date code verified components
• Full traceability documentation

For technical support or volume pricing, contact our EEPROM specialists at [Your Contact Info].