Microchip Technology 25LC010AT-H/SN

Overview

25LC010AT-H/SN from Microchip Technology is a 1 kbit (128 × 8) SPI serial EEPROM with 16-byte page write capability, operating across 2.5V–5.5V supply and rated for -40°C to +150°C extended temperature range. It features hardware write-protection (WP), HOLD suspend functionality, and supports up to 5 MHz clock frequency for embedded control, automotive sensor calibration, and industrial configuration storage.

For engineers reviewing the 25LC010AT-H/SN datasheet, 25LC010AT-H/SN pinout, 25LC010AT-H/SN application, or 25LC010AT-H/SN equivalent, key selection criteria include its high-temp SOIC-8 package, 6 ms max internal write cycle time, block-level write protection (BP0/BP1), 1M endurance cycles, and compatibility with standard SPI Mode 0,0 and Mode 1,1 interfaces.

Technical Context

The 25LC010AT-H/SN implements a SPI-compatible serial interface with separate SI (data in) and SO (data out) lines, CS-controlled selection, and HOLD pin for mid-sequence suspension without reset. Its internal architecture includes an 8-bit instruction register, page latches, and HV generator for EEPROM programming.

It supports byte-write and page-write operations within 16-byte boundaries, enforces write enable latch (WEL) activation before writes, and provides real-time status monitoring via RDSR (Read Status Register) with WIP and WEL bits. Block protection is configurable via nonvolatile BP0/BP1 bits to secure 0%, 25%, 50%, or 100% of the memory array.

Key Specifications

Pinout & Package

25LC010AT-H/SN is housed in an 8-lead Pb-free SOIC (SN) package, 3.90 mm body width, RoHS compliant, with standard JEDEC outline and thermal performance validated for extended temperature operation (-40°C to +150°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC010AT-H/SN, 25AA010A-I/SN offers identical functionality at lower cost but sacrifices high-temp qualification, while AT25010B-MAHL-T trades HOLD support and extended temperature for higher clock rate-neither is pin-compatible nor drop-in replaceable due to differing timing and feature sets.

Availability

25LC010AT-H/SN is available at Aetrix Electronics and suitable for automotive engine control, industrial PLC configuration, medical sensor calibration, and smart energy metering applications requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for 25LC010AT-H/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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on embedded control and industrial reliability.

The 25LCXXXA family was designed specifically for high-reliability, extended-temperature SPI EEPROM applications in automotive, industrial, and medical systems where data integrity under thermal stress is critical.

FAQ

What is the maximum clock frequency supported by the 25LC010AT-H/SN at 2.5V supply?

The 25LC010AT-H/SN supports a maximum clock frequency of 3 MHz when VCC is between 2.5V and 4.5V, as specified in Table 1-2 AC Characteristics. This limit ensures reliable setup/hold timing margins and signal integrity under low-voltage, high-temperature conditions. At 4.5V–5.5V, the max clock increases to 5 MHz. The 25LC010AT-H/SN must be operated within these bounds to guarantee correct read/write behavior across its full -40°C to +150°C range.

Does the 25LC010AT-H/SN support page write operations across memory boundaries?

No, the 25LC010AT-H/SN does not support page writes across memory boundaries. Its 16-byte page structure requires all bytes in a single page-write command to reside within the same physical page (e.g., addresses 0x00–0x0F, 0x10–0x1F). Attempting to write across a boundary causes the address counter to wrap to the start of the current page, overwriting earlier data. This behavior is explicitly documented in Figure 3-3 and Section 3.3. The 25LC010AT-H/SN enforces this constraint in hardware to maintain EEPROM integrity.

How does the HOLD pin function during an active write cycle in the 25LC010AT-H/SN?

The HOLD pin in the 25LC010AT-H/SN has no effect on an ongoing internal write cycle. Once CS is raised after a valid write sequence, the 6 ms self-timed write begins and cannot be paused or interrupted by HOLD. HOLD only suspends serial communication (SI/SO/SCK sampling) during active SPI transactions-not during internal EEPROM programming. The 25LC010AT-H/SN will complete the write regardless of HOLD state, and SO remains high-impedance until the cycle finishes and STATUS register becomes readable again.

What protection mechanisms prevent unintended writes to the 25LC010AT-H/SN during power-up?

The 25LC010AT-H/SN incorporates three hardware-level protections against unintended writes at power-up: (1) automatic reset of the write enable latch (WEL), (2) requirement of an explicit WREN instruction before any write is accepted, and (3) built-in power-on/off data protection circuitry that disables write paths until VCC stabilizes. These features ensure the 25LC010AT-H/SN remains in read-only mode until firmware intentionally enables writes-eliminating risk of corruption during brown-out or cold-start conditions.

Can the 25LC010AT-H/SN be used in SPI Mode 3,0 (CPOL=1, CPHA=0)?

No, the 25LC010AT-H/SN supports only SPI Mode 0,0 (CPOL=0, CPHA=0) and Mode 1,1 (CPOL=1, CPHA=1), as confirmed by Figure 1-2 and Figure 1-3 timing diagrams and Section 2.5 Serial Clock description. In Mode 0,0, data is sampled on the rising edge of SCK and output on the falling edge-matching the 25LC010AT-H/SN's SI/SO timing requirements. Using Mode 3,0 would violate setup/hold specifications and result in unreliable communication. The 25LC010AT-H/SN does not support CPHA=0 with CPOL=1.