Microchip Technology AT25010A-10PU-1.8

Overview

AT25010A-10PU-1.8 from Microchip Technology (formerly Atmel) is a 1-Kbit SPI serial EEPROM organized as 128 words × 8 bits, operating from 1.8 V to 5.5 V, supporting 20 MHz clock rate at 5 V, featuring 8-byte page write and hardware/software write protection. It serves as nonvolatile configuration storage in industrial sensor nodes and embedded control modules requiring low-voltage operation.

For engineers reviewing the AT25010A-10PU-1.8 datasheet, AT25010A-10PU-1.8 pinout, AT25010A-10PU-1.8 application, or AT25010A-10PU-1.8 equivalent, key selection criteria include 1.8 V minimum supply, SPI Mode 0/3 compatibility, block write protection granularity, HOLD/CS suspend capability, and PDIP-8 package suitability for through-hole prototyping and legacy industrial PCBs.

Technical Context

The AT25010A-10PU-1.8 implements a synchronous slave SPI interface with dedicated SI/SO lines, CS-controlled selection, and independent HOLD and WP pins for real-time communication suspension and hardware-level write inhibition. Its status register supports four block protection levels (none, 1/4, 1/2, full array) via BP1/BP0 bits.

Internally, it uses self-timed 5 ms max write cycles with no erase prerequisite, 1 million endurance cycles, and 100-year data retention. The device powers up write-disabled and requires explicit WREN instruction before programming - a requirement enforced regardless of WP pin state.

Key Specifications

Pinout & Package

AT25010A-10PU-1.8 is packaged in an 8-lead JEDEC PDIP (0.300" wide body, 8P3), suitable for breadboarding, manual soldering, and legacy board rework.

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/P, the AT25010A-10PU-1.8 uniquely balances ultra-low-voltage operation (1.8 V), proven 100-year retention, and legacy PDIP-8 compatibility - making it optimal for cost-sensitive, long-lifecycle industrial upgrades where voltage flexibility and mechanical fit are non-negotiable.

Availability

AT25010A-10PU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and medical device settings storage requiring stable component supply across extended product lifecycles.

Supply support for AT25010A-10PU-1.8 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 broad industrial and automotive qualification programs.

The AT25010A-10PU-1.8 belongs to Microchip's legacy serial EEPROM product line, engineered for robust, low-power nonvolatile storage in resource-constrained embedded systems where reliability and long-term availability are prioritized over feature expansion.

FAQ

What is the minimum supply voltage supported by the AT25010A-10PU-1.8?

The AT25010A-10PU-1.8 supports a minimum supply voltage of 1.8 V, as confirmed by its "−1.8" suffix and DC Characteristics table specifying VCC1 = 1.8 V min. This allows direct integration with 1.8 V logic families and battery-powered systems where voltage headroom is constrained. Operation below 1.8 V is not guaranteed and may result in undefined behavior or failed write cycles. The AT25010A-10PU-1.8 maintains full functionality-including SPI communication, page write, and status register access-across the entire 1.8 V to 5.5 V range.

Does the AT25010A-10PU-1.8 support SPI Mode 3, and how is it configured?

Yes, the AT25010A-10PU-1.8 explicitly supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as stated in its Features section. No hardware configuration is required-the device automatically adapts to the master's clock polarity and phase settings. Mode selection is handled entirely by the host MCU's SPI peripheral configuration; the AT25010A-10PU-1.8 does not contain mode-select pins or internal registers for this purpose. Timing parameters in Table 4 are specified per voltage range to ensure reliable operation under either mode.

How does the HOLD pin function during an active SPI transaction on the AT25010A-10PU-1.8?

The HOLD pin on the AT25010A-10PU-1.8 suspends serial communication without resetting the internal address counter or command state. To activate HOLD, the pin must be driven low while SCK is low; the SO pin immediately enters high-impedance, and SI inputs are ignored. To resume, HOLD is returned high while SCK remains low-then normal clocking resumes from the exact bit position where it paused. This behavior is fully documented in the HOLD Timing diagram (Figure 10) and enables deterministic interruption for higher-priority MCU tasks without data loss or re-synchronization overhead in the AT25010A-10PU-1.8.

What protection mechanisms prevent unintended writes to the AT25010A-10PU-1.8?

The AT25010A-10PU-1.8 employs three layered protections: (1) hardware write disable via the WP pin (low = all writes blocked), (2) software write enable latch requiring explicit WREN instruction before any WRITE/WRSR command, and (3) nonvolatile block protection bits (BP1/BP0) that lock memory segments. All three operate independently-WP overrides WREN, and block protection restricts address ranges even when WREN is asserted. The AT25010A-10PU-1.8 powers up with WEN = 0 and BP1/BP0 = 00 (no protection), ensuring safe default behavior until explicitly configured.

Is the AT25010A-10PU-1.8 pin-compatible with other variants in the AT25010A family?

Yes, all AT25010A variants-including AT25010A-10PU-1.8, AT25010A-10PU-2.7, and surface-mount versions like AT25010AN-10SU-1.8-share identical 8-pin functional mapping and electrical characteristics per their respective voltage grades. The "PU" suffix denotes PDIP-8 packaging with RoHS-compliant green finish, while "−1.8" specifies the 1.8–5.5 V operating range. Pinout remains consistent across packages (PDIP, SOIC, TSSOP, MLP), enabling drop-in substitution where board layout permits mechanical adaptation. The AT25010A-10PU-1.8 thus offers seamless migration between voltage grades and package types without firmware or schematic changes.