Microchip Technology 24LC02BH-I/MS

Overview

24LC02BH-I/MS from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory with hardware write-protect for the upper half-array (80h–FFh), 400 kHz max clock frequency at V_CC ≥ 2.5 V, and industrial temperature range (–40°C to +85°C). It operates down to 2.5 V, supports page writes of up to 8 bytes, and is commonly used for storing calibration data, configuration settings, or device identifiers in embedded control modules.

For engineers reviewing the 24LC02BH-I/MS datasheet, 24LC02BH-I/MS pinout, 24LC02BH-I/MS application, or 24LC02BH-I/MS equivalent, key selection criteria include its half-array write-protection logic, 1 µA standby current, Schmitt-triggered SDA/SCL inputs for noise immunity, and compatibility with standard I²C bus timing at both 100 kHz and 400 kHz.

Technical Context

The 24LC02BH-I/MS implements a two-wire I²C interface with fixed 7-bit client address (1010xxx) and R/W bit, supporting byte and page write modes with self-timed erase/write cycles. Its internal Address Pointer auto-increments during sequential reads and random-access operations.

Write protection is controlled solely by the WP pin: tied to V_CC, it disables writes to addresses 80h–FFh; tied to V_SS, full-array write access is enabled. Pins A0–A2 are unconnected and may be left floating or tied to V_SS/V_CC without functional impact.

Key Specifications

Pinout & Package

24LC02BH-I/MS is supplied in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed pad optionally connected to V_SS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with 24AA02H-I/MS and AT24C02D-MAHM-T, the 24LC02BH-I/MS uniquely combines AEC-Q100 qualification, hardware half-array write-protection, and guaranteed 400 kHz operation at 2.5 V - making it optimal for automotive and industrial control applications demanding both robustness and selective data security.

Availability

24LC02BH-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply across extended production lifecycles.

Supply support for 24LC02BH-I/MS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.

The 24LC02BH belongs to Microchip's 24XX02H family of I²C serial EEPROMs, designed specifically for reliable, low-power nonvolatile data storage in space-constrained embedded systems requiring industrial or automotive-grade reliability.

FAQ

What is the minimum V_CC required for reliable operation of the 24LC02BH-I/MS?

The 24LC02BH-I/MS requires a minimum V_CC of 2.5 V for full functionality including 400 kHz I²C operation. Below 2.5 V, the device is not specified - unlike the 24AA02H variant which supports down to 1.7 V. Operating the 24LC02BH-I/MS at voltages below 2.5 V may result in undefined timing, failed writes, or communication errors.

How does the WP pin function on the 24LC02BH-I/MS?

On the 24LC02BH-I/MS, the WP pin enables hardware write-protection: when tied to V_CC, writes to memory addresses 80h–FFh are inhibited while reads remain fully functional; when tied to V_SS, full-array write access is enabled. This allows permanent protection of critical firmware metadata stored in the upper half of the 256-byte array.

Can the 24LC02BH-I/MS be used in AEC-Q100 qualified automotive applications?

Yes - the 24LC02BH-I/MS is explicitly AEC-Q100 qualified for automotive use and rated for the industrial temperature range (–40°C to +85°C). Its qualification covers stress testing for temperature cycling, humidity bias, and ESD, making it suitable for body control modules, infotainment configuration storage, and other non-safety-critical automotive subsystems.

What is the maximum page write size supported by the 24LC02BH-I/MS?

The 24LC02BH-I/MS supports an 8-byte page write buffer. When performing a page write, the host must ensure all bytes fall within the same physical page boundary (i.e., addresses aligned to 0x00–0x07, 0x08–0x0F, etc.). Crossing a page boundary causes wraparound within the current page, potentially overwriting previously loaded data - software must enforce alignment.

Are pins A0, A1, and A2 functional on the 24LC02BH-I/MS?

No - pins A0, A1, and A2 are not internally connected on the 24LC02BH-I/MS and serve no addressing or configuration purpose. They may be left floating or tied to V_SS or V_CC without affecting device operation. The 24LC02BH-I/MS uses a fixed I²C client address (1010xxx) with the three most-significant bits of the word address ignored.