Microchip Technology AT25020A-10PU-1.8

Overview

AT25020A-10PU-1.8 from Microchip Technology (formerly Atmel) is a 2-Kbit SPI serial EEPROM organized as 256 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 mode 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 AT25020A-10PU-1.8 datasheet, AT25020A-10PU-1.8 pinout, AT25020A-10PU-1.8 application, or AT25020A-10PU-1.8 equivalent, key selection criteria include 1.8 V minimum supply, 5 ms max self-timed write cycle, block write protection granularity (1/4, 1/2, or full array), HOLD pin for serial communication suspension, and JEDEC SOIC-8 package compatibility with legacy PCB layouts.

Technical Context

The AT25020A-10PU-1.8 implements a synchronous SPI slave interface compliant with Modes 0 and 3, using separate SI and SO pins for full-duplex data transfer with MSB-first framing. Its internal architecture includes an 8-bit instruction register, status register with BP1/BP0 protection bits, and automatic address increment during page writes.

It operates as a true SPI slave with no internal clock generation-SCK is strictly input-only-and supports read/write operations without external erase cycles. The HOLD pin enables pause/resume of ongoing serial sequences while maintaining internal state, and the WP pin provides hardware-level write inhibition independent of software commands.

Key Specifications

Pinout & Package

AT25020A-10PU-1.8 uses an 8-lead JEDEC SOIC (8S1) package, 0.150" wide body, RoHS-compliant green plastic gull-wing outline with 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95256-DRMN6TP/K and CAT25256VI-GT3, the AT25020A-10PU-1.8 offers optimal balance of proven reliability, minimal pin count, and precise 2-Kbit allocation-ideal for cost-sensitive industrial controllers where over-provisioning memory increases BOM cost without benefit.

Availability

AT25020A-10PU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, smart energy metering, and automotive body control module applications requiring stable component supply across extended product lifecycles.

Supply support for AT25020A-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 a focus on embedded control and connectivity.

The AT25020A-10PU-1.8 belongs to Microchip's legacy serial EEPROM product line, designed specifically for robust, low-power nonvolatile storage in industrial and commercial systems where SPI simplicity and long-term data integrity are paramount.

FAQ

What is the maximum clock frequency supported by AT25020A-10PU-1.8 at 1.8 V supply?

The AT25020A-10PU-1.8 supports up to 5 MHz SCK frequency when operated at 1.8 V, as specified in Table 4 AC Characteristics under the 1.8–5.5 V voltage column. This ensures reliable timing margins for low-voltage microcontroller interfaces while maintaining full SPI Mode 0/3 compatibility. The 20 MHz rating applies only at VCC ≥ 4.5 V.

Does AT25020A-10PU-1.8 require an external erase command before writing?

No, the AT25020A-10PU-1.8 does not require a separate erase command. All write operations-including byte and page writes-are fully self-timed and automatically include necessary erase-and-program sequencing. The device enters write mode only after successful WREN execution and valid WRITE instruction, with internal logic managing cell conditioning without host intervention.

How is write protection implemented on AT25020A-10PU-1.8?

AT25020A-10PU-1.8 implements dual-layer write protection: hardware via the WP pin (low disables all writes instantly), and software via BP1/BP0 bits in the status register (configurable 1/4, 1/2, or full array lock). Both mechanisms operate independently-WP override takes precedence, and status register protection persists through power cycles due to nonvolatile BP bit storage.

What package type does AT25020A-10PU-1.8 use, and is it RoHS-compliant?

AT25020A-10PU-1.8 uses an 8-lead JEDEC SOIC package (8S1), 0.150" wide body, with gull-wing leads and 1.27 mm pitch. The "U" suffix explicitly denotes Green Package compliance with RoHS Directive 2011/65/EU and halogen-free materials, verified per Microchip's packaging documentation.

Can AT25020A-10PU-1.8 be used in automotive applications?

The AT25020A-10PU-1.8 is qualified for industrial temperature range (−40°C to +85°C) and is not officially qualified for automotive AEC-Q100 stress testing. While functionally compatible in benign automotive subsystems (e.g., infotainment UI storage), Microchip explicitly states in its disclaimer that these devices are "not intended, authorized, or warranted for use in automotive applications"-designers must verify suitability per specific vehicle OEM requirements.