Microchip Technology AT25010N-10SI-2.7

Overview

AT25010N-10SI-2.7 from Atmel (now Microchip) is a 1-Kbit SPI serial EEPROM organized as 128 words × 8 bits, operating from 2.7V to 5.5V, supporting 3.0 MHz clock rate at 5V, and featuring hardware write protection via WP pin and 8-byte page write capability. It is used in industrial control systems for parameter storage, calibration data retention, and firmware configuration backup.

For engineers reviewing the AT25010N-10SI-2.7 datasheet, AT25010N-10SI-2.7 pinout, AT25010N-10SI-2.7 application, or AT25010N-10SI-2.7 equivalent, key selection considerations include SPI Mode 0/3 compatibility, block write protection granularity (1/4, 1/2, or full array), self-timed 10 ms max write cycle, and JEDEC SOIC-8 packaging with industrial temperature range (-40°C to +85°C).

Technical Context

The AT25010N-10SI-2.7 operates as an SPI slave device with dedicated SI/SO pins, CS-controlled selection, and HOLD pin for pausing communication without reset. Its instruction set includes WREN/WRDI for latch control and RDSR/WRSR for status and protection register access.

It implements nonvolatile BP1/BP0 bits in the status register to configure four protection levels-none, top quarter (0x60–0x7F), top half (0x40–0x7F), or full array (0x00–0x7F)-and supports MSB-first 8-bit op-code + address + data transfers initiated by CS falling edge.

Key Specifications

Pinout & Package

AT25010N-10SI-2.7 uses an 8-lead JEDEC SOIC package (package code 8S1), 0.150" wide body, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25010N-10SI-2.7, M95010-WMN6TP extends thermal range while maintaining pin and functional compatibility, whereas 25AA010A-I/SN improves power efficiency and ESD robustness at the cost of slightly higher unit price and different marking convention.

Availability

AT25010N-10SI-2.7 is available at Aetrix Electronics and suitable for industrial automation, embedded instrumentation, and medical device manufacturing requiring stable component supply across long product lifecycles.

Supply support for AT25010N-10SI-2.7 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

Atmel Corporation, now part of Microchip Technology, is a semiconductor company specializing in microcontrollers, nonvolatile memory, and security ICs for industrial and automotive markets.

The AT25010N-10SI-2.7 belongs to Atmel's SPI Serial EEPROM family, designed specifically for reliable, low-voltage, low-pin-count nonvolatile storage in space-constrained embedded systems.

FAQ

What is the maximum clock frequency supported by the AT25010N-10SI-2.7?

The AT25010N-10SI-2.7 supports up to 3.0 MHz at VCC = 5.0 V and 2.1 MHz at VCC = 2.7 V. These values are specified in the AC Characteristics table and reflect guaranteed timing margins across the full industrial temperature range. The AT25010N-10SI-2.7 does not require external clock dividers when interfaced with common 3.3 V or 5 V microcontrollers running SPI peripherals at these rates.

Does the AT25010N-10SI-2.7 require a separate erase command before writing?

No, the AT25010N-10SI-2.7 performs automatic erase during the write cycle - no explicit ERASE instruction is needed. Each WRITE operation internally erases and reprograms the target byte or page. This simplifies firmware design and eliminates risk of stale data from incomplete erase sequences. The AT25010N-10SI-2.7 achieves this through its floating-gate EEPROM cell architecture.

How does the HOLD pin function during an active SPI transaction on the AT25010N-10SI-2.7?

The HOLD pin suspends serial communication while preserving the internal address counter and instruction state. To activate HOLD, it must be driven low while SCK is low; resuming requires driving HOLD high while SCK remains low. During HOLD, SI inputs are ignored and SO enters high-impedance. This behavior is fully documented in the AT25010N-10SI-2.7 functional description and timing diagrams.

Can the AT25010N-10SI-2.7 be used with SPI Mode 1 or Mode 2 interfaces?

No - the AT25010N-10SI-2.7 explicitly supports only SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as stated in its Features section. Attempting Mode 1 or Mode 2 will result in incorrect sampling of SI/SO data due to mismatched clock polarity and phase. The AT25010N-10SI-2.7's timing diagrams and instruction timing are validated exclusively for Modes 0 and 3.

What happens if the WP pin is pulled low during a write operation on the AT25010N-10SI-2.7?

If WP is driven low while CS is still low but before the internal write cycle begins, the AT25010N-10SI-2.7 aborts the write and returns to standby. If WP goes low after the internal write has started, it has no effect - the cycle completes normally. This behavior is defined in the WRITE PROTECT section of the AT25010N-10SI-2.7 datasheet and ensures predictable failure modes during voltage brownouts or noise events.