Microchip Technology 25LC010AT-I/OT

Overview

25LC010AT-I/OT 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, 16-byte page write capability, and industrial temperature rating (–40°C to +85°C). It features hardware write protection (WP pin), HOLD functionality for interrupt-safe bus suspension, and block-level array protection (none/¼/½/all). Used in microcontroller-based systems for configuration storage, calibration data retention, and firmware parameter backup.

For engineers reviewing the 25LC010AT-I/OT datasheet, 25LC010AT-I/OT pinout, 25LC010AT-I/OT application, or 25LC010AT-I/OT equivalent, key selection criteria include SPI timing compliance at 2.5V–5.5V, WP/HOLD pin behavior under interrupt conditions, endurance (1M cycles), data retention (>200 years), and SOT-23-6 package compatibility with space-constrained PCB layouts.

Technical Context

The 25LC010AT-I/OT implements a standard SPI Mode 0,0/Modes 1,1 interface with separate SI/SO lines, CS-controlled selection, and synchronous serial access. Its internal architecture includes an 8-bit instruction register, page latches, and high-voltage generation circuitry for EEPROM programming.

It supports byte and page write operations (up to 16 bytes within a single 16-byte page boundary), sequential read with automatic address roll-over, and STATUS register polling (WIP/WEL/BP bits) for write cycle completion detection - all while maintaining SO tri-state during HOLD assertion or CS deassertion.

Key Specifications

Pinout & Package

25LC010AT-I/OT is housed in a Pb-free, RoHS-compliant 6-lead SOT-23 package (1.6 mm × 2.8 mm × 1.1 mm height), optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA010AT-I/OT and AT25010B-MAU-Y, the 25LC010AT-I/OT provides optimal balance of industrial temperature support, HOLD capability, and cost-efficiency for 3.3/5 V systems - making it the preferred choice for new designs requiring robust interrupt handling and long-term data integrity.

Availability

25LC010AT-I/OT is available at Aetrix Electronics and suitable for smart metering, industrial sensor calibration, automotive body control modules, and IoT edge device identity management requiring stable component supply across extended product lifecycles.

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

The 25LC010A family was designed specifically for reliable, low-power, SPI-based nonvolatile data storage in cost-sensitive industrial and automotive applications - emphasizing endurance, data retention, and ease of integration with mainstream MCUs.

FAQ

What is the maximum clock frequency supported by the 25LC010AT-I/OT across its full voltage range?

The 25LC010AT-I/OT supports up to 10 MHz at VCC ≥ 4.5 V, 5 MHz at 2.5 V ≤ VCC < 4.5 V, and 3 MHz at 1.8 V ≤ VCC < 2.5 V. However, since the 25LC010AT-I/OT is rated for 2.5–5.5 V operation, its guaranteed maximum is 10 MHz (at 4.5–5.5 V) and 5 MHz (at 2.5–4.5 V). This ensures timing margin for robust SPI communication in noisy industrial environments.

Does the 25LC010AT-I/OT require external pull-up resistors on its SO or WP pins?

No - the 25LC010AT-I/OT has an internally pulled-up WP pin and does not require external pull-up. The SO pin is actively driven and tri-stated when CS is high or HOLD is low, so no pull-up is needed. External pull-ups on SI or SCK are also unnecessary unless shared with open-drain buses; standard push-pull SPI drivers interface directly.

How does the HOLD pin behave during an active write cycle in the 25LC010AT-I/OT?

The HOLD pin has no effect on an ongoing internal write cycle (TWC) in the 25LC010AT-I/OT. Once CS rises after a valid write sequence, the 5 ms internal write begins and cannot be paused or aborted by HOLD. HOLD only suspends SPI command/data transfer - not EEPROM programming - ensuring data integrity even if host interrupts occur mid-write.

Can the 25LC010AT-I/OT be used in a 1.8 V system?

No - the 25LC010AT-I/OT is specified for 2.5–5.5 V operation only. For 1.8 V systems, the pin-compatible 25AA010AT-I/OT (1.8–5.5 V) is the appropriate Microchip alternative. Using the 25LC010AT-I/OT below 2.5 V risks unreliable read/write operation, excessive timing violations, and potential data corruption due to insufficient internal charge pump voltage.

What happens if a page write crosses a 16-byte boundary in the 25LC010AT-I/OT?

If a page write command attempts to cross a 16-byte boundary (e.g., writing 16 bytes starting at address 0x0F), the 25LC010AT-I/OT wraps the data to the start of the same page (0x00), overwriting previously written bytes. This is a documented hardware behavior - application firmware must validate address alignment and split writes across page boundaries to prevent unintended data loss.