Microchip Technology AT25080-10PC-1.8

Overview

AT25080-10PC-1.8 from Atmel is an 8-Kbit SPI serial EEPROM organized as 1024 × 8-bit memory, operating at 1.8V–3.6V supply, supporting 500 kHz max clock rate (1.8V), with 32-byte page write, block write protection, and 1 million write cycles endurance. It serves as nonvolatile configuration storage in low-power embedded systems such as smart meters and portable medical devices.

For engineers reviewing the AT25080-10PC-1.8 datasheet, AT25080-10PC-1.8 pinout, AT25080-10PC-1.8 application, or AT25080-10PC-1.8 equivalent, key selection criteria include 1.8V operation capability, SPI Mode 0/3 compatibility, hardware/software write protection, 5 ms typical write cycle time, and PDIP-8 packaging for through-hole prototyping and industrial control modules.

Technical Context

The AT25080-10PC-1.8 implements a synchronous 3-wire SPI slave interface with dedicated SI (input) and SO (output) pins, requiring CS activation and MSB-first data framing. Its internal architecture includes an 8-bit instruction register handling op-codes for READ, WRITE, WREN, WRDI, RDSR, and WRSR - all self-timed without external erase cycles.

Block write protection is managed via nonvolatile BP0/BP1 bits in the status register, enabling selective locking of 0%, 25%, 50%, or 100% of the 1024-word array. The HOLD pin suspends ongoing serial transfers without resetting sequence state, while WP provides hardware-level inhibition of status register writes when WPEN = 1 and WP = low.

Key Specifications

Pinout & Package

AT25080-10PC-1.8 uses an 8-pin Plastic Dual Inline Package (PDIP) with 0.300" body width, compliant with JEDEC MS-001 BA standard. Pin 1 is marked by a notch or dot; leads are gull-wing shaped with 0.100" pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95080-DRMN3TP/K and BR24G08NUX-10, the AT25080-10PC-1.8 offers unique HOLD pin support for interrupt-safe serial transfers and PDIP-8 packaging for prototyping - making it optimal for industrial control and development-stage designs where debug flexibility and deterministic timing matter more than raw speed or minimal footprint.

Availability

AT25080-10PC-1.8 is available at Aetrix Electronics and suitable for smart energy metering, portable medical devices, industrial PLC I/O modules, and automotive body control units requiring stable component supply across extended product lifecycles.

Supply support for AT25080-10PC-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

Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for embedded systems.

The AT25080-10PC-1.8 belongs to Atmel's SPI Serial EEPROM product line, designed specifically for low-voltage, low-power embedded applications demanding reliable nonvolatile storage with flexible voltage operation and robust data protection.

FAQ

What is the maximum SPI clock frequency supported by the AT25080-10PC-1.8 at 1.8V?

The AT25080-10PC-1.8 supports up to 500 kHz SCK frequency when operated at 1.8V–3.6V. This value is specified in the AC Characteristics table under fSCK for the 1.8–3.6V voltage range. Exceeding this limit may cause read/write failures or timing violations, especially under worst-case temperature and process corners.

Does the AT25080-10PC-1.8 require an external erase command before writing new data?

No, the AT25080-10PC-1.8 does not require a separate erase command. All write operations are self-timed and automatically erase the target memory location prior to programming. A Write Enable (WREN) instruction must precede each WRITE or WRSR command, but no explicit ERASE instruction exists in the AT25080-10PC-1.8 instruction set.

How does the HOLD pin function during an active SPI read sequence on the AT25080-10PC-1.8?

When the HOLD pin is asserted low during an active SPI read, the AT25080-10PC-1.8 pauses data transmission on SO without resetting the internal address counter. SCK may continue toggling, but SI inputs are ignored and SO remains in high-impedance state until HOLD returns high while SCK is low - then reading resumes from the same address.

Can the AT25080-10PC-1.8 be used in industrial temperature applications?

The AT25080-10PC-1.8 is rated for commercial temperature range (0°C to +70°C). For industrial operation (-40°C to +85°C), use the functionally identical AT25080-10PI-1.8 variant - same pinout, electrical specs, and 1.8V operation, but qualified across the extended temperature range.

What happens if the WP pin is held low while the WPEN bit is '0' in the AT25080-10PC-1.8 status register?

If WPEN = 0, the WP pin has no effect on write protection - all memory and status register writes remain enabled regardless of WP pin state. This allows safe installation in systems where WP is tied to ground, while still permitting full configuration via software-controlled WRSR instructions.