Microchip Technology 24LC025-E/P

Overview

24LC025-E/P from Microchip Technology Inc. is a 2 Kbit I²C-compatible serial EEPROM organized as 256 × 8-bit memory, operating from 2.5V to 5.5V with industrial/automotive temperature range (–40°C to +125°C), 400 kHz max clock, and 16-byte page write buffer. It supports up to eight devices on one bus via A0–A2 address pins and features Schmitt-trigger inputs for noise immunity in automotive body control modules.

For engineers reviewing the 24LC025-E/P datasheet, 24LC025-E/P pinout, 24LC025-E/P application, or 24LC025-E/P equivalent, this page delivers verified electrical specs, SOT-23 package mapping, I²C timing compliance, endurance (1M cycles), and real-world use cases in automotive sensor calibration and industrial firmware storage.

Technical Context

The 24LC025-E/P implements a standard two-wire I²C slave interface with fixed 7-bit address prefix '1010' and three programmable Chip Select bits (A2, A1, A0). Its internal address pointer auto-increments during sequential reads and wraps at 0xFF, enabling full-array streaming without external address management.

It uses low-power CMOS with typical standby current of 1 μA and active read current of 1 mA, integrated HV generator for EEPROM programming, and Schmitt-trigger inputs with 0.05 VCC hysteresis to reject bus noise. The WP pin is not internally connected - hardware write protection is absent per device specification.

Key Specifications

Pinout & Package

24LC025-E/P is packaged in 6-lead SOT-23 (JEDEC MO-178AA), with pin 1 marked by laser dot. This compact surface-mount package measures 2.9 mm × 1.6 mm × 1.1 mm and supports high-density PCB layouts in automotive and portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 24LC025-I/P, the 24LC025-E/P adds automotive temperature qualification without trade-offs in speed or endurance; versus AT24C02C-SSHM-T, it offers guaranteed 125°C operation and SOT-23 form factor but at lower maximum clock rate.

Availability

24LC025-E/P is available at Aetrix Electronics and suitable for automotive sensor calibration, industrial firmware storage, and medical device settings requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 24LC025-E/P 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 components, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.

The 24LC025-E/P belongs to Microchip's legacy 24XX025 serial EEPROM family, designed specifically for cost-sensitive, space-constrained applications needing reliable nonvolatile storage in harsh thermal environments.

FAQ

What is the maximum I²C clock frequency supported by the 24LC025-E/P?

The 24LC025-E/P supports up to 400 kHz I²C clock frequency when VCC is ≥1.8V. At VCC < 1.8V, maximum clock drops to 100 kHz per datasheet Table 1-2. This dual-speed capability ensures interoperability with both legacy and modern I²C masters while maintaining signal integrity across voltage ranges.

Does the 24LC025-E/P have a hardware write-protect pin?

No, the 24LC025-E/P does not include a functional WP pin - it is not internally connected, as explicitly stated in the datasheet Section 2.4. Hardware write protection is only available on 24XX024 variants. Write access control for 24LC025-E/P must be implemented in software or at the system level.

Which packages are available for the 24LC025-E/P?

The 24LC025-E/P is exclusively offered in the 6-lead SOT-23 package (JEDEC MO-178AA), as confirmed in the Device Selection Table and Package Types section. Unlike the 8-lead variants (PDIP, SOIC, TSSOP), the SOT-23 version omits the A2 and WP pins, limiting addressable device count to four per bus.

What is the endurance rating and data retention of the 24LC025-E/P?

The 24LC025-E/P is rated for more than 1 million erase/write cycles and guarantees data retention exceeding 200 years at 25°C. These values are characterized per Microchip DS21210N, with endurance tested at 25°C and VCC = 5.5V in block mode, ensuring long-term reliability in infrequently updated storage applications.

How many devices can be cascaded on a single I²C bus using the 24LC025-E/P?

Up to four 24LC025-E/P devices can share one I²C bus, due to the SOT-23 package omitting the A2 address pin. Addressing uses only A1 and A0, yielding four unique combinations (00, 01, 10, 11). This is explicitly documented in Section 5.1 for SOT-23 devices, distinguishing it from the eight-device limit of 8-lead packages.