Technical Summary: 24256 B I2C-Compatible EEPROM

Overview

The 24256 B is a high-performance, I2C-compatible Electrically Erasable Programmable Read-Only Memory (EEPROM) designed for applications requiring reliable non-volatile data storage. With a storage capacity of 256 Kbits (32 Kbytes), this component provides a robust solution for embedded systems, consumer electronics, and industrial applications. The device supports a wide voltage range and offers low power consumption, making it suitable for battery-operated devices.

Featuring an industry-standard I2C interface, the 24256 B ensures seamless integration with microcontrollers and other digital systems. Its electrically erasable and reprogrammable memory cells allow for up to 1,000,000 write cycles, ensuring long-term durability and data retention for up to 100 years.

Features

• Memory Capacity: 256 Kbits (32 Kbytes) organized as 32,768 x 8 bits.
• Interface: I2C-compatible (supports standard, fast, and fast-mode plus up to 1 MHz).
• Voltage Range: Operates from 1.7V to 5.5V, supporting a wide range of applications.
• Write Endurance: 1,000,000 write cycles per byte.
• Data Retention: 100 years minimum at 25°C.
• Low Power Consumption: Active current of 1 mA (typical) and standby current of 1 µA (typical).
• Page Write Mode: Supports 64-byte page write operations for efficient data storage.
• Hardware Write Protection: WP pin enables protection against inadvertent writes.
• Temperature Range: Industrial-grade operation from -40°C to +85°C.
• Packaging Options: Available in 8-pin PDIP, SOIC, TSSOP, and UDFN packages.

Applications

The 24256 B is widely used in applications requiring non-volatile memory storage with high reliability and low power consumption. Key application areas include:

• Embedded Systems: Configuration storage, firmware updates, and parameter storage in microcontrollers.
• Consumer Electronics: Smartphones, wearables, and IoT devices for storing user settings and calibration data.
• Automotive Systems: Event logging, sensor calibration, and infotainment system storage.
• Industrial Automation: Data logging, equipment configuration, and factory calibration settings.
• Medical Devices: Secure storage of patient data and device configuration in portable medical equipment.

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_CC): -0.6V to +6.5V
• Input Voltage (V_IN): -0.6V to V_CC + 0.6V
• Storage Temperature: -65°C to +150°C
• Operating Temperature: -40°C to +85°C

DC Characteristics

• Supply Current (Active Read): 1 mA (typical) at 1 MHz, V_CC = 5V
• Supply Current (Standby): 1 µA (typical) at V_CC = 5V
• Input Low Voltage (V_IL): -0.5V to 0.3V_CC
• Input High Voltage (V_IH): 0.7V_CC to V_CC + 0.5V

AC Characteristics

• Clock Frequency (f_SCL): Up to 1 MHz (Fast-Mode Plus)
• Start Condition Hold Time (t_HD;STA): 0.6 µs (min)
• Stop Condition Setup Time (t_SU;STO): 0.6 µs (min)
• Data Hold Time (t_HD;DAT): 0 µs (min)

Package Information

8-Pin PDIP (Plastic Dual In-Line Package)

• Dimensions: 9.81 mm x 6.35 mm body, 2.54 mm pitch.
• Pin Configuration:
  • Pin 1: A0 (Address Input)
  • Pin 2: A1 (Address Input)
  • Pin 3: A2 (Address Input)
  • Pin 4: V_SS (Ground)
  • Pin 5: SDA (Serial Data)
  • Pin 6: SCL (Serial Clock)
  • Pin 7: WP (Write Protect)
  • Pin 8: V_CC (Supply Voltage)

8-Pin SOIC (Small Outline Integrated Circuit)

• Dimensions: 5.00 mm x 4.00 mm body, 1.27 mm pitch.
• Pin Configuration: Same as PDIP.

8-Pin TSSOP (Thin Shrink Small Outline Package)

• Dimensions: 3.00 mm x 4.40 mm body, 0.65 mm pitch.
• Pin Configuration: Same as PDIP.

8-Pin UDFN (Ultra-Thin Dual Flat No-Lead)

• Dimensions: 2.00 mm x 3.00 mm body, 0.50 mm pitch.
• Pin Configuration: Same as PDIP.

Conclusion

The 24256 B I2C-compatible EEPROM is a versatile and reliable memory solution for a wide range of applications. Its combination of high endurance, low power consumption, and flexible voltage operation makes it an ideal choice for designers seeking non-volatile storage in space-constrained or power-sensitive environments. With multiple packaging options and industrial-grade temperature support, this component is well-suited for demanding applications across various industries.