Microchip Technology 25LC010AT-I/ST

Overview

25LC010AT-I/ST from Microchip Technology Inc. is a 1 Kbit (128 × 8) SPI Serial EEPROM with 16-byte page write capability, 10 MHz max clock frequency at 4.5–5.5 V, and industrial temperature range (−40°C to +85°C). It features hardware write protection via WP pin, HOLD functionality for interrupt-safe serial pauses, and block-level write protection (none/¼/½/all array). Used in microcontroller-based systems for storing calibration data, configuration settings, or firmware patches.

For engineers reviewing the 25LC010AT-I/ST datasheet, 25LC010AT-I/ST pinout, 25LC010AT-I/ST application, or 25LC010AT-I/ST equivalent, key selection criteria include VCC range (2.5–5.5 V), page write timing (≤5 ms), endurance (1,000,000 cycles), data retention (>200 years), and SOIC-8 package compatibility with SPI bus timing constraints.

Technical Context

The 25LC010AT-I/ST implements a standard SPI Mode 0,0 or Mode 1,1 interface with separate SI (data in) and SO (data out) lines, CS-controlled selection, and SCK-synchronized transfers. 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.

Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate self-timed internal write cycle (TWC ≤ 5 ms). The HOLD pin suspends ongoing SPI communication without resetting sequence state, while WP pin disables all nonvolatile writes when asserted low - both functions validated across −40°C to +85°C operation.

Key Specifications

Pinout & Package

25LC010AT-I/ST is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with standard 150-mil width and 1.27 mm pitch. Pin 1 is marked by laser indentation at top-left corner; package is Pb-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC010AT-I/ST, the 25AA010AT-I/ST extends voltage flexibility downward without sacrificing speed or reliability, while the AT25010B-SSHL-T trades clock performance and register compatibility for Atmel/Dialog ecosystem alignment - neither offers pin-for-pin replacement without design review.

Availability

25LC010AT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, and automotive body control module designs requiring stable component supply, long-life data retention, and SPI-compatible nonvolatile storage.

Supply support for 25LC010AT-I/ST 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 family is part of Microchip's serial EEPROM product line designed specifically for reliable, low-power, SPI-based configuration and data logging in industrial, automotive, and consumer applications.

FAQ

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

The 25LC010AT-I/ST supports up to 10 MHz clock frequency when VCC is between 4.5 V and 5.5 V. At 2.5 V ≤ VCC < 4.5 V, the maximum clock frequency is 5 MHz. These limits are defined in Table 1-2 of the DS21832H datasheet and ensure reliable setup/hold timing margins across the industrial temperature range. Exceeding these frequencies may cause read/write failures or data corruption in the 25LC010AT-I/ST.

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

Yes, the 25LC010AT-I/ST supports page write mode with a fixed page size of 16 bytes. This allows up to 16 sequential bytes to be loaded into the page buffer and written in a single internal cycle (≤5 ms). Page boundaries align to addresses ending in 0x0F (e.g., 0x00–0x0F, 0x10–0x1F); crossing a boundary wraps data to the start of the current page. This behavior is explicitly documented for the 25LC010AT-I/ST in Section 2.3.

How does the HOLD pin function in the 25LC010AT-I/ST, and what are its timing requirements?

The HOLD pin in the 25LC010AT-I/ST pauses ongoing SPI communication without resetting the internal address pointer or instruction state. To activate HOLD, the pin must be driven low while SCK is low; to resume, it must be raised high while SCK remains low. Setup (THS) and hold (THH) times are voltage-dependent (20–80 ns), and output transitions are disabled during HOLD. This feature is fully specified for the 25LC010AT-I/ST in Tables 1-2 and Figure 1-1.

What write protection mechanisms are implemented in the 25LC010AT-I/ST?

The 25LC010AT-I/ST implements three layered write protections: (1) hardware WP pin that disables all writes when low; (2) volatile write-enable latch (WEL) set via WREN instruction; (3) nonvolatile block protection bits (BP0/BP1) in the STATUS register controlling 0%, 25%, 50%, or 100% array protection. All three mechanisms are active simultaneously and documented for the 25LC010AT-I/ST in Sections 2.4–2.6 and Table 2-4.

Is the 25LC010AT-I/ST RoHS compliant and Pb-free?

Yes, the 25LC010AT-I/ST is Pb-free and RoHS compliant, as confirmed in the "Features" section of DS21832H and Package Marking Information (Section 4.1). The SOIC-8 package uses matte tin (Sn) plating per JEDEC standards, and the "e3" marking appears on packaging. This compliance applies specifically to the 25LC010AT-I/ST variant and is verified in Microchip's official packaging specifications.