Microchip Technology 25LC010AT-I/MS

Overview

25LC010AT-I/MS from Microchip Technology Inc. is a 1 Kbit (128 × 8) SPI serial EEPROM with 2.5–5.5 V supply range, 10 MHz max clock frequency, and industrial temperature rating (–40°C to +85°C). It features hardware write protection (WP pin), HOLD functionality for interrupt-safe pausing, and 16-byte page write capability - used for nonvolatile configuration storage in microcontroller-based embedded systems.

For engineers reviewing the 25LC010AT-I/MS datasheet, 25LC010AT-I/MS pinout, 25LC010AT-I/MS application, or 25LC010AT-I/MS equivalent, key selection criteria include SPI interface compatibility, VCC voltage range compliance, page-write boundary handling, and hardware write-protection behavior under power-up and WP assertion.

Technical Context

The 25LC010AT-I/MS implements a standard SPI Mode 0,0 (CPOL=0, CPHA=0) interface with separate SI/SO lines and active-low CS. Its internal architecture includes an 8-bit instruction register, status register (WIP/WEL/BP0/BP1), and page latches enabling up to 16-byte writes within fixed 16-byte physical pages (00h–0Fh, 10h–1Fh, etc.).

Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate self-timed internal write cycle (≤5 ms). The HOLD pin suspends ongoing SPI transfers without resetting the sequence, and WP pin disables all writes when low - both functions are active during standby and read modes.

Key Specifications

Pinout & Package

25LC010AT-I/MS is packaged in an 8-lead MSOP (Micro Small Outline Package), 3.0 mm × 3.0 mm body, 0.65 mm pitch, with exposed pad (optional VSS connection). Pin 1 marked by laser dot; pin numbering follows standard MSOP convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA010AT-I/MS and AT25010B-MAHM-T, the 25LC010AT-I/MS provides optimal balance of industrial temperature support, hardware write protection fidelity, and MSOP footprint - avoiding unnecessary speed or voltage range overhead in cost-sensitive embedded designs.

Availability

25LC010AT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration storage, automotive body control module settings, and medical device configuration backup requiring stable component supply and long-term lifecycle support.

Supply support for 25LC010AT-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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 25LC010A series belongs to Microchip's SPI Serial EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems across industrial, automotive, and medical markets.

FAQ

What is the maximum clock frequency supported by the 25LC010AT-I/MS?

The 25LC010AT-I/MS 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 drops to 5 MHz. These limits are defined in Table 1-2 of the DS21832H datasheet and must be observed to ensure reliable SPI communication. Exceeding them risks data corruption or command rejection.

Does the 25LC010AT-I/MS support page write operations, and what is the page size?

Yes, the 25LC010AT-I/MS supports page write mode with a fixed page size of 16 bytes. Physical pages begin at addresses 00h, 10h, 20h, ..., 70h. Writing across a page boundary causes wraparound to the start of the current page - software must enforce alignment. This behavior is documented in Section 2.3 and Figure 2-3 of the DS21832H datasheet.

How does the WP pin function on the 25LC010AT-I/MS?

The WP (Write-Protect) pin on the 25LC010AT-I/MS disables all write operations (array and STATUS register) when held low, regardless of WEL state. It does not affect reads or HOLD functionality. If WP is low during power-up or while a write is in progress, the write enable latch resets but ongoing writes complete. This behavior is specified in Table 2-4 and Section 2.7 of DS21832H.

What is the operating temperature range for the 25LC010AT-I/MS?

The 25LC010AT-I/MS is rated for the Industrial temperature range of –40°C to +85°C, as indicated by the "I" suffix in the part number. This is confirmed in the Device Selection Table (page 1) and Electrical Characteristics section (Table 1-1) of DS21832H. It is not qualified for automotive (–40°C to +125°C) use - that requires the "E" variant (e.g., 25LC010AE).

Can the 25LC010AT-I/MS be used with 3.3 V microcontrollers?

Yes, the 25LC010AT-I/MS is fully compatible with 3.3 V microcontrollers: its VCC range (2.5–5.5 V) includes 3.3 V, and its input thresholds (VIH1 = 0.7×VCC, VIL1 = 0.3×VCC) align with standard 3.3 V CMOS logic levels. No level translation is needed when interfacing with 3.3 V SPI masters, as verified in DC Characteristics Table D001–D003 of DS21832H.