Microchip Technology AT25010AN-10SU-2.7-T

Overview

AT25010AN-10SU-2.7-T from Microchip Technology (formerly Atmel) is a 1-Kbit SPI serial EEPROM organized as 128 words × 8 bits, operating from 2.7V to 5.5V with 20 MHz max clock rate at 5V, 8-byte page write capability, and hardware/software write protection via WP pin and status register. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules.

For engineers reviewing the AT25010AN-10SU-2.7-T datasheet, AT25010AN-10SU-2.7-T pinout, AT25010AN-10SU-2.7-T application, or AT25010AN-10SU-2.7-T equivalent, key selection criteria include VCC range compatibility (2.7–5.5V), SOIC-8 package footprint, SPI Mode 0/3 timing compliance, block write protection granularity, and 1 million endurance cycles for firmware parameter logging.

Technical Context

The AT25010AN-10SU-2.7-T implements a synchronous slave SPI interface with dedicated SI/SO lines, CS-controlled selection, and HOLD pin for serial communication suspension without reset. Its internal architecture includes an 8-bit instruction register, status register with BP1/BP0 for 1/4–full array protection, and automatic address increment during page writes.

It supports self-timed internal write cycles (≤5 ms), requires WREN before WRITE, and maintains high-impedance SO during CS high or HOLD active. Write disable occurs automatically post-write cycle, and RDY bit in status register indicates busy state-enabling polling-based write completion detection without external timing constraints.

Key Specifications

Pinout & Package

AT25010AN-10SU-2.7-T uses an 8-lead JEDEC SOIC (8S1) package: 0.150" wide body, gull-wing leads, RoHS-compliant green finish ("U" suffix), industrial temperature range (−40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95128-WMN6TP and 25AA010A-I/SN, the AT25010AN-10SU-2.7-T offers optimal balance of 2.7V compatibility, proven field reliability, and cost efficiency for 1-Kbit configuration storage - making it ideal for legacy 3.3V designs where voltage margin is constrained.

Availability

AT25010AN-10SU-2.7-T is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, medical device settings backup, and automotive body control module applications requiring stable component supply across extended production lifecycles.

Supply support for AT25010AN-10SU-2.7-T 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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on embedded control and connectivity.

The AT25010AN-10SU-2.7-T belongs to Microchip's legacy AT25 serial EEPROM family, designed for low-voltage, low-power nonvolatile storage in resource-constrained embedded systems where SPI interface simplicity and long-term data integrity are critical.

FAQ

What is the maximum SPI clock frequency supported by the AT25010AN-10SU-2.7-T?

The AT25010AN-10SU-2.7-T supports up to 20 MHz SCK frequency when VCC = 5.0V, 10 MHz at 2.7–3.6V, and 5 MHz at 1.8–2.7V. These values are specified in Table 4 of the datasheet and reflect guaranteed timing margins under load conditions (CL = 30 pF + 1 TTL gate). The AT25010AN-10SU-2.7-T must be operated within these limits to ensure reliable read/write operations.

Does the AT25010AN-10SU-2.7-T require an external pull-up resistor on the SO pin?

No, the AT25010AN-10SU-2.7-T features an internally controlled tri-state output buffer on the SO pin, which transitions to high-impedance when CS is high or HOLD is asserted. External pull-ups are unnecessary and may cause bus contention during active output phases. The AT25010AN-10SU-2.7-T relies on proper CS timing and master-side input termination instead.

How does block write protection work on the AT25010AN-10SU-2.7-T?

Block write protection on the AT25010AN-10SU-2.7-T is controlled by BP1/BP0 bits in the status register, enabling protection of 0%, 25%, 50%, or 100% of the 128-word array. For the AT25010AN-10SU-2.7-T, Level 1 (BP1=0, BP0=1) protects addresses 0x60–0x7F (32 bytes), matching its 1-Kbit organization. Protection is enforced regardless of WREN status or WP pin state.

Can the AT25010AN-10SU-2.7-T be used in automotive applications?

The AT25010AN-10SU-2.7-T is rated for industrial temperature (−40°C to +85°C) and is not qualified to AEC-Q100 standards. While it may function in some automotive cabin environments, Microchip explicitly states in the datasheet disclaimer that "Atmel's products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life." For automotive use, consider AEC-Q100-qualified alternatives like the 25LC010A-I/P.

What happens if the WP pin is pulled low during an active write cycle on the AT25010AN-10SU-2.7-T?

If the WP pin is pulled low after the internal write cycle has already started on the AT25010AN-10SU-2.7-T, the ongoing write completes normally. However, WP low prevents subsequent write attempts-including WREN, WRSR, and WRITE instructions-until WP is returned high. This behavior ensures partial writes are not aborted mid-cycle, preserving data consistency for the AT25010AN-10SU-2.7-T.