Microchip Technology 25LC080D-I/P

Overview

25LC080D-I/P from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page size, and industrial temperature range (−40°C to +85°C). It operates from 2.5V to 5.5V, supports up to 10 MHz clock frequency, and delivers 5 mA read/write current at 5.5V - used for nonvolatile parameter storage in embedded control systems, sensor calibration data retention, and firmware configuration backup.

For engineers reviewing the 25LC080D-I/P datasheet, 25LC080D-I/P pinout, 25LC080D-I/P application, or 25LC080D-I/P equivalent, key selection criteria include SPI timing compliance at 10 MHz, 32-byte page write capability, hardware write protection via WP pin and STATUS register, and compatibility with PIC® and other SPI-capable microcontrollers in space-constrained industrial designs.

Technical Context

The 25LC080D-I/P implements a standard SPI Mode 0,0 interface with separate SI (data in) and SO (data out) lines, requiring CS, SCK, and HOLD for full protocol support. Its internal architecture includes a 32-byte page latch, status register with WIP/WEL/BP bits, and high-voltage generator for EEPROM cell programming.

Write operations require explicit WREN instruction followed by CS high after final data bit; page writes are bounded strictly within 32-byte physical pages (000h–01Fh, 020h–03Fh, etc.), and crossing boundaries causes wraparound. Built-in power-on reset clears the write enable latch, and HOLD suspends ongoing transfers while preserving internal state.

Key Specifications

Pinout & Package

25LC080D-I/P is packaged in 8-lead PDIP (Plastic Dual In-Line Package), 300 mil body width, through-hole mountable with 0.100" pitch. Pin 1 is marked with notch or dot; package is Pb-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080D-I/SN and AT25080B-10PU-2.7, the 25LC080D-I/P offers optimal trade-off between mechanical robustness (through-hole PDIP), page-write efficiency (32-byte), and industrial-grade reliability - making it ideal for lab validation, small-batch industrial controllers, and repair-friendly designs where solderability and hand-soldering access matter.

Availability

25LC080D-I/P is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control modules, smart energy meters, and medical diagnostic devices requiring stable component supply across extended product lifecycles.

Supply support for 25LC080D-I/P 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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 25LC080D-I/P belongs to Microchip's 25XX080 family of SPI Serial EEPROMs, designed specifically for reliable, low-power, nonvolatile data storage in cost-sensitive industrial and automotive applications where SPI interface simplicity and long-term data integrity are essential.

FAQ

What is the maximum clock frequency supported by the 25LC080D-I/P?

The 25LC080D-I/P supports up to 10 MHz SPI clock frequency when VCC is 4.5V to 5.5V. At 2.5V ≤ VCC < 4.5V, the maximum clock drops to 5 MHz. These limits are defined in Table 1-2 of the DS22151B datasheet and ensure reliable setup/hold timing across voltage and temperature ranges. The 25LC080D-I/P must be operated within these AC specifications to guarantee correct read/write behavior.

Does the 25LC080D-I/P require external pull-up resistors on its SPI lines?

The 25LC080D-I/P does not require external pull-ups on SI, SO, or SCK - these pins are actively driven. However, CS and WP should be pulled high via 10 kΩ resistors in most designs to ensure defined states during power-up and idle periods. HOLD may also benefit from a weak pull-up (100 kΩ) to prevent spurious suspension. The 25LC080D-I/P internal circuitry does not include weak pull-ups on any pin.

How does page write operation work in the 25LC080D-I/P?

In the 25LC080D-I/P, a page write transfers up to 32 bytes starting from an address aligned to a 32-byte boundary (e.g., 0x000, 0x020, 0x040). If the write crosses a boundary, data wraps to the start of the same page - overwriting prior bytes. The 25LC080D-I/P requires CS to go high after the last data bit to initiate the internal 5 ms write cycle. Page writes improve throughput versus byte writes but demand careful address alignment in firmware.

Can the 25LC080D-I/P be used with a 1.8V microcontroller?

No - the 25LC080D-I/P has a minimum VCC of 2.5V and is not rated for 1.8V operation. Attempting to power it from 1.8V will result in undefined behavior, failed writes, or communication errors. For 1.8V systems, consider the 25AA080D-I/P (1.8–5.5V supply) or AT25080B-10PU-2.7. The 25LC080D-I/P is optimized for 3.3V and 5V domains where its 2.5V–5.5V range provides margin and noise immunity.

What happens to the write enable latch after a successful write operation on the 25LC080D-I/P?

After a successful WRITE instruction completes (i.e., CS goes high following the final data bit), the write enable latch in the 25LC080D-I/P is automatically reset. This means the next write attempt will fail unless WREN is reissued. The latch is also cleared on power-up, WRDI execution, or WRSR execution - ensuring default write protection. This behavior prevents accidental overwrites and is fundamental to the 25LC080D-I/P's data safety architecture.