Microchip Technology AT25010B-MAHL-E

Overview

AT25010B-MAHL-E from Microchip Technology is a 1 Kbit (128 × 8) SPI Serial EEPROM IC designed for nonvolatile data storage in embedded control and system configuration circuits. It operates from 1.8V to 5.5V, supports up to 20 MHz clock rate at 5V, features hardware/software write protection via WP pin and STATUS register, and delivers 1,000,000 write cycles with 100-year data retention - deployed in industrial sensor nodes and power management firmware storage.

For engineers reviewing the AT25010B-MAHL-E datasheet, AT25010B-MAHL-E pinout, AT25010B-MAHL-E application, or AT25010B-MAHL-E equivalent, key selection criteria include low-voltage SPI compatibility (1.8V–5.5V), 8-byte page write capability, block-level write protection (1/4, 1/2, or full array), HOLD/CS-controlled serial suspend functionality, and industrial temperature range (-40°C to +85°C) compliance.

Technical Context

The AT25010B-MAHL-E implements a synchronous SPI slave interface supporting Modes 0 and 3, with data latched on SCK rising edge and output on falling edge. Its internal architecture includes a high-voltage generation circuit for EEPROM programming, a STATUS register with BP1/BP0 bits for nonvolatile block protection, and a Power-on Reset (POR) circuit ensuring safe initialization before instruction acceptance.

It integrates hardware-based write inhibition via the WP pin and software-controlled write enable/disable (WREN/WRDI) with status feedback through RDY/BSY bit. The HOLD pin enables real-time suspension of ongoing serial transfers without resetting the command sequence - critical for multi-master arbitration or interrupt-driven host systems.

Key Specifications

Pinout & Package

AT25010B-MAHL-E is packaged in an 8-lead SOIC (Small Outline Integrated Circuit) with standard JEDEC MS-012AC footprint and gull-wing leads. This surface-mount package supports automated PCB assembly and offers thermal and mechanical reliability for reflow-soldered industrial designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95010-WMN6TP and BR25G010FJ-WE2, the AT25010B-MAHL-E uniquely combines HOLD functionality, precise SPI Mode 0/3 timing compliance, and verified industrial-grade reliability - making it optimal for applications requiring deterministic serial suspend and long-term field stability under thermal stress.

Availability

AT25010B-MAHL-E is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system boot configuration, and smart energy meter firmware patch logging requiring stable component supply across extended production lifecycles.

Supply support for AT25010B-MAHL-E 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 AT25010B-MAHL-E belongs to Microchip's AT25xxx family of SPI Serial EEPROMs, engineered specifically for robust, low-power nonvolatile storage in industrial, automotive, and communications infrastructure applications where data integrity and long-term reliability are critical.

FAQ

What is the memory organization of the AT25010B-MAHL-E?

The AT25010B-MAHL-E contains 1,024 bits of EEPROM memory organized as 128 words × 8 bits. This structure supports byte-addressable reads and writes, with 8-byte page write capability to optimize sequential data updates. The memory array is accessed via SPI commands including READ (0x03) and WRITE (0x02), and its layout is fixed - no bank switching or extended addressing is implemented in this device.

Does the AT25010B-MAHL-E support both SPI Mode 0 and Mode 3?

Yes, the AT25010B-MAHL-E supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1). In both modes, data is sampled on the rising edge of SCK and output on the falling edge. The key distinction lies in SCK idle state polarity: low in Mode 0 and high in Mode 3. The AT25010B-MAHL-E datasheet documents Mode 0 operation, but electrical specifications validate full compatibility with Mode 3 timing.

How does the Write-Protect (WP) pin function on the AT25010B-MAHL-E?

The WP pin on the AT25010B-MAHL-E provides hardware-level write inhibition: when pulled low, it disables all write operations - including memory writes and STATUS register modifications - regardless of WEL bit state. If WP goes low mid-transaction, it interrupts pending writes but has no effect once the internal write cycle begins. For full protection, WP should be tied to VCC (high) during normal operation and grounded only during maintenance or field lockout.

What is the purpose of the HOLD pin on the AT25010B-MAHL-E?

The HOLD pin on the AT25010B-MAHL-E suspends ongoing SPI communication without resetting the command state machine. When asserted (low) while CS is active and SCK is low, it places SO in high-impedance and ignores SI/SCK inputs until deasserted. This enables time-critical host interrupts or bus arbitration without losing context - however, HOLD does not pause active internal write cycles, which continue to completion.

What are the default settings of the STATUS register after power-up on the AT25010B-MAHL-E?

At power-up, the AT25010B-MAHL-E initializes its STATUS register with WEL = 0 (write disabled), RDY/BSY = 0 (ready state), and BP1/BP0 unchanged from their last written value (nonvolatile). The device enters Standby mode, requires a CS low-to-high transition to accept instructions, and ships with memory array pre-filled with 0xFFh and BP bits set to 00 (no protection enabled).