Microchip Technology 25LC010A-E/MS

Overview

25LC010A-E/MS from Microchip Technology Inc. is a 1 Kbit (128 × 8) SPI bus serial EEPROM with 2.5–5.5 V supply range, 10 MHz max clock frequency, and automotive-grade temperature operation (–40°C to +125°C). It features write page mode (16-byte pages), hardware write protection via WP pin, and HOLD functionality for interrupt-safe serial communication - used in engine control units, ADAS sensor modules, and automotive infotainment firmware storage.

For engineers reviewing the 25LC010A-E/MS datasheet, 25LC010A-E/MS pinout, 25LC010A-E/MS application, or 25LC010A-E/MS equivalent, key selection criteria include its automotive temp grade, MSOP-8 package compatibility, SPI timing compliance at 125°C, and block-level write protection configuration via STATUS register BP0/BP1 bits.

Technical Context

The 25LC010A-E/MS implements a standard SPI Mode 0,0/Modes 1,1 interface with separate SI/SO lines and CS-controlled device selection. Its internal architecture includes an 8-bit instruction register, page latches, and high-voltage generation circuitry for EEPROM programming - enabling byte and page writes with self-timed internal cycles (≤5 ms).

It supports dual write-protection mechanisms: hardware-based via the WP pin (active-low, overrides WEL state), and software-configurable via BP0/BP1 bits in the nonvolatile STATUS register - allowing selective protection of 0%, 25%, 50%, or 100% of the 128-byte memory array.

Key Specifications

Pinout & Package

25LC010A-E/MS is packaged in an 8-lead MSOP (Mini Small Outline Package) with 0.65 mm lead pitch, 3.0 mm × 3.0 mm body size, and exposed pad (optional VSS connection). Pin 1 is marked by laser indentation per JEDEC MO-187AA.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC010A-I/MS, the -E/MS variant adds guaranteed operation at +125°C and AEC-Q100 alignment; versus AT25010B-MAHL-T, it trades voltage flexibility and speed for HOLD support and automotive qualification - making it optimal for thermally demanding, interrupt-sensitive automotive nodes.

Availability

25LC010A-E/MS is available at Aetrix Electronics and suitable for engine control units, ADAS sensor modules, and automotive infotainment systems requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for 25LC010A-E/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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory products, with global design and manufacturing infrastructure.

The 25LC010A belongs to Microchip's serial EEPROM product line, engineered specifically for automotive, industrial, and consumer applications requiring robust, low-pin-count nonvolatile storage with SPI simplicity and AEC-Q100 alignment.

FAQ

What is the maximum clock frequency supported by the 25LC010A-E/MS across its full operating voltage and temperature range?

The 25LC010A-E/MS supports up to 10 MHz at VCC ≥ 4.5 V and TA ≤ +125°C, 5 MHz at 2.5 V ≤ VCC < 4.5 V, and 3 MHz at 1.8 V ≤ VCC < 2.5 V - though the -E/MS variant is rated only for 2.5–5.5 V operation. Timing parameters such as TCSS, THD, and TV are fully specified across –40°C to +125°C, ensuring reliable SPI communication in automotive environments.

How does the HOLD function behave during an active write cycle in the 25LC010A-E/MS?

The HOLD pin cannot pause an internal write cycle once initiated; it only suspends SPI command/data transfer sequences. If HOLD is asserted during a write, the device completes the ongoing internal 5 ms write operation before entering hold state. The WIP bit remains set until completion, and SO enters high-impedance - preserving bus integrity without corrupting the write.

Can the 25LC010A-E/MS be used interchangeably with the 25AA010A in a design?

No - the 25LC010A-E/MS has a minimum VCC of 2.5 V and is automotive-qualified (–40°C to +125°C), whereas the 25AA010A operates down to 1.8 V and is rated only for industrial temperature (–40°C to +85°C). Substituting them risks functional failure below 2.5 V or at temperatures above 85°C, and voids AEC-Q100 compliance for the -E/MS part.

What happens to the write enable latch (WEL) in the 25LC010A-E/MS after a successful write operation?

After any successful WRITE, WRSR, or WRDI instruction - or when the WP pin is driven low - the WEL bit in the STATUS register is automatically cleared. This ensures no subsequent write commands execute unless WREN is explicitly reissued, enforcing mandatory write-enable discipline for data integrity in automotive systems.

Is the exposed pad on the MSOP-8 package of the 25LC010A-E/MS electrically connected, and how should it be handled on the PCB?

Yes, the exposed pad (Pin 4) on the 25LC010A-E/MS MSOP-8 package is internally connected to VSS and must be soldered to a PCB ground plane for optimal thermal dissipation and EMI suppression. Microchip recommends connecting it directly to VSS with multiple thermal vias - leaving it floating violates recommended handling and degrades reliability in high-temperature automotive operation.