Microchip Technology 25LC010A-E/P

Overview

25LC010A-E/P from Microchip Technology Inc. is a 1 Kbit (128 × 8) SPI Serial EEPROM with 16-byte page write capability, 10 MHz max clock frequency, and automotive-grade temperature support (−40°C to +125°C). It features hardware write protection (WP pin), HOLD functionality for interrupt-safe serial communication, and block-level array protection (none/¼/½/all). Used in engine control units, ADAS sensor modules, and automotive infotainment for nonvolatile parameter storage.

For engineers reviewing the 25LC010A-E/P datasheet, 25LC010A-E/P pinout, 25LC010A-E/P application, or 25LC010A-E/P equivalent, key selection criteria include VCC range (2.5–5.5 V), endurance (1 million cycles), data retention (>200 years), SPI timing compliance (Mode 0,0 and 1,1), and automotive qualification per E-temp grade.

Technical Context

The 25LC010A-E/P implements a standard SPI interface with separate SI (data in), SO (data out), SCK (clock), CS (chip select), WP (write-protect), and HOLD (pause) signals. It uses an internal 8-bit instruction register and supports MSb-first transmission of READ/WRITE/RDSR/WRSR commands.

Write operations require explicit WREN instruction and CS high transition to initiate self-timed internal write cycle (≤5 ms). Block protection is controlled via BP0/BP1 bits in the STATUS register, enabling selective write-locking of memory segments - critical for firmware configuration safety in automotive systems.

Key Specifications

Pinout & Package

25LC010A-E/P is supplied in 8-lead PDIP (Plastic Dual In-line Package) with lead finish Matte Tin (Pb-free, RoHS compliant). Pin 1 is marked by laser dot; package outline conforms to JEDEC MS-001.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA010A-I/P and AT25010B-SSH-T, the 25LC010A-E/P uniquely delivers automotive-grade reliability (E-temp), integrated HOLD for interrupt-safe operation, and hardware WP pin - making it the sole choice for safety-critical powertrain and ADAS subsystems requiring guaranteed data integrity.

Availability

25LC010A-E/P is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, and automotive infotainment systems requiring stable component supply across long production lifecycles.

Supply support for 25LC010A-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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 25LC010A belongs to Microchip's serial EEPROM product line, engineered specifically for automotive and industrial applications demanding high reliability, extended temperature operation, and robust SPI interface compliance.

FAQ

What is the maximum clock frequency supported by the 25LC010A-E/P?

The 25LC010A-E/P supports up to 10 MHz clock frequency when VCC is 4.5 V to 5.5 V. At 2.5 V ≤ VCC < 4.5 V, the maximum clock frequency is 5 MHz. These limits are specified in Table 1-2 of the DS21832H datasheet and ensure reliable setup/hold timing across automotive voltage ranges. The 25LC010A-E/P must be operated within these AC characteristics to guarantee correct read/write behavior.

Does the 25LC010A-E/P support page write operations, and what is the page size?

Yes, the 25LC010A-E/P supports page write mode with a fixed page size of 16 bytes. This allows up to 16 consecutive bytes to be loaded into the page buffer and written in a single internal cycle (≤5 ms). Physical page boundaries align to addresses ending in 0h–Fh (e.g., 00h–0Fh, 10h–1Fh), and crossing a boundary wraps data to the start of the same page - a behavior explicitly documented in the DS21832H functional description.

How does the HOLD pin function in the 25LC010A-E/P, and what design benefit does it provide?

The HOLD pin on the 25LC010A-E/P suspends ongoing SPI communication while preserving the internal address pointer and command state. When pulled low (with SCK low), SI/SO/SCK enter high-impedance, allowing the host MCU to service higher-priority interrupts without losing transaction context. This eliminates the need to restart SPI sequences, reducing firmware complexity and ensuring deterministic timing - especially valuable in real-time automotive systems using the 25LC010A-E/P.

What write protection mechanisms are implemented in the 25LC010A-E/P?

The 25LC010A-E/P implements three layered write protections: (1) hardware WP pin (Pin 3) that disables all writes when low; (2) volatile Write Enable Latch (WEL) set/reset via WREN/WRDI instructions; and (3) nonvolatile Block Protection bits (BP0/BP1) in the STATUS register controlling 0%, 25%, 50%, or 100% array lock. These are detailed in Tables 2-3 and 2-4 of DS21832H and collectively prevent accidental or malicious corruption of stored calibration data.

Is the 25LC010A-E/P qualified for automotive applications, and what temperature range does it support?

Yes, the 25LC010A-E/P carries the "E" suffix denoting Automotive qualification, with full operation guaranteed from −40°C to +125°C. This rating is validated per AEC-Q100 stress test requirements and confirmed in the Device Selection Table (page 1) and Electrical Characteristics (Table 1-1) of DS21832H. Its Pb-free, RoHS-compliant 8-lead PDIP package further supports automotive manufacturing standards.