Microchip Technology 25LC010AT-I/SN

Overview

25LC010AT-I/SN from Microchip Technology Inc. is a 1 Kbit (128 × 8-bit) SPI Serial EEPROM with 16-byte page write capability, 10 MHz max clock frequency at 4.5–5.5V, and industrial temperature range (−40°C to +85°C). It features hardware write protection (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 parameters.

For engineers reviewing the 25LC010AT-I/SN datasheet, 25LC010AT-I/SN pinout, 25LC010AT-I/SN application, or 25LC010AT-I/SN equivalent, key selection criteria include VCC range (2.5–5.5V), SO/SI/SCK/CS/HOLD/WP/VSS/VCC 8-pin interface, 5 µA standby current, 5 ms max write cycle time, and 1M endurance cycles - all critical for low-power embedded storage designs.

Technical Context

The 25LC010AT-I/SN implements a standard SPI Mode 0,0 or Mode 1,1 interface with separate SI (data-in) and SO (data-out) lines, requiring only CS, SCK, SI, SO, WP, HOLD, VCC, and VSS. 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 latch enable state; writes are inhibited if WP = low or WEL = 0. The HOLD pin suspends ongoing transfers without resetting the sequence, allowing host MCU to service higher-priority interrupts while preserving SPI state - validated across all supported VCC ranges (2.5–5.5V) and temperatures (−40°C to +85°C).

Key Specifications

Pinout & Package

25LC010AT-I/SN is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with standard 150-mil body width and gull-wing leads. Pin 1 is marked by laser dot or notch; 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 25AA010AT-I/SN and AT25010B-SSHL-T, the 25LC010AT-I/SN provides optimal cost-performance balance for industrial temperature-range applications without requiring sub-2.5V operation or AEC-Q100 certification - reducing BOM cost while maintaining full functional compatibility.

Availability

25LC010AT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply and long-term obsolescence management.

Supply support for 25LC010AT-I/SN 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.

The 25LC010A family delivers cost-optimized, SPI-compatible EEPROMs targeting space-constrained, low-power embedded systems requiring reliable nonvolatile storage - designed for seamless integration with PIC® and other mainstream MCUs.

FAQ

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

The 25LC010AT-I/SN supports up to 10 MHz clock frequency when VCC is between 4.5V and 5.5V. At 2.5V ≤ VCC < 4.5V, the maximum clock frequency is 5 MHz. These limits are defined in the AC Characteristics table (DS21832H, Table 1-2) and ensure reliable setup/hold timing across the full industrial temperature range.

Does the 25LC010AT-I/SN require external pull-up resistors on its SO or SI lines?

No, the 25LC010AT-I/SN does not require external pull-up resistors on SO or SI. The SO pin is actively driven or tri-stated; SI is CMOS input with no pull-up requirement. Pull-ups are only needed if the host MCU lacks internal weak pull-ups and the bus is shared - but this is a system-level design choice, not a device requirement.

How does the HOLD function behave during a write cycle in the 25LC010AT-I/SN?

The HOLD function is disabled during an internal write cycle (TWC) in the 25LC010AT-I/SN. While HOLD can pause read or command sequences, it has no effect once the write cycle begins - the device completes the internal programming regardless of HOLD state. This behavior is documented in Section 2.8 (Power-On State) and Figure 2-2 of DS21832H.

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

No, the 25LC010AT-I/SN is not rated for 1.8V operation. Its specified VCC range is 2.5V to 5.5V. For 1.8V systems, Microchip's 25AA010AT-I/SN (1.8–5.5V) is the compatible alternative. Using 25LC010AT-I/SN below 2.5V violates Absolute Maximum Ratings and may result in unreliable reads/writes or increased failure rate.

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

If a page write command attempts to cross a 16-byte boundary in the 25LC010AT-I/SN, data wraps around to the start of the same page instead of advancing to the next page. For example, writing 16 bytes starting at address 0x6F fills 0x6F–0x7E then overwrites 0x70–0x7F. This wrap behavior is explicitly stated in Section 2.3 and requires firmware to enforce page-aligned writes.