Microchip Technology 25C080-I/P

Overview

25C080-I/P from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with industrial temperature range (−40°C to +85°C), 3 MHz max clock frequency at 4.5–5.5 V, 1024 × 8-bit organization, and 16-byte page write capability. It serves as nonvolatile configuration storage in microcontroller-based systems requiring reliable, low-power data retention.

For engineers reviewing the 25C080-I/P datasheet, 25C080-I/P pinout, 25C080-I/P application, or 25C080-I/P equivalent, key selection criteria include VCC operating range (4.5–5.5 V), write cycle time (≤5 ms), hardware write protection via WP pin, HOLD functionality for interrupt-safe SPI pauses, and PDIP-8 industrial-grade packaging.

Technical Context

The 25C080-I/P implements a standard SPI Mode 0,0 interface with separate SI (data in) and SO (data out) lines, CS-controlled device selection, and SCK-synchronized serial communication. Its internal architecture includes a status register with WIP, WEL, BP0/BP1, and WPEN bits enabling configurable block write protection and real-time write-in-progress monitoring.

It supports sequential read, byte/page write, and status register access using fixed 8-bit opcodes (e.g., 0x03 for READ, 0x02 for WRITE, 0x05 for RDSR). Write operations require explicit WREN instruction and CS high-to-low transition to initiate self-timed internal erase/write cycles, with automatic WEL reset after completion.

Key Specifications

Pinout & Package

25C080-I/P uses an 8-pin Plastic Dual In-line Package (PDIP) with 300 mil body width, JEDEC MS-001 compliant, through-hole mountable. Pin spacing is 0.100 inch (2.54 mm), lead width 0.045–0.070 inch, and overall length 0.360–0.385 inch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA080-I/P and 25LC080-I/P, the 25C080-I/P delivers highest SPI clock rate (3 MHz) and tightest VCC window (4.5–5.5 V), making it optimal for legacy 5 V industrial designs prioritizing write speed and noise immunity over voltage flexibility.

Availability

25C080-I/P is available at Aetrix Electronics and suitable for industrial control panels, medical device calibration storage, automotive body control modules, and networking equipment requiring stable component supply across extended temperature ranges.

Supply support for 25C080-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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 25C080-I/P belongs to Microchip's legacy SPI Serial EEPROM product line, engineered for robust, low-power nonvolatile data storage in 5 V industrial and automotive applications where deterministic timing and hardware write protection are critical.

FAQ

What is the maximum clock frequency supported by the 25C080-I/P?

The 25C080-I/P supports a maximum clock frequency of 3 MHz when operated within its specified VCC range of 4.5 V to 5.5 V. This value is confirmed in the Device Selection Table and AC Characteristics section of DS21230E. At lower supply voltages, the maximum clock rate decreases - e.g., 2 MHz at 2.5–4.5 V (25LC080) and 1 MHz at 1.8–2.5 V (25AA080) - but those limits do not apply to the 25C080-I/P, which is rated exclusively for 4.5–5.5 V operation.

Does the 25C080-I/P support hardware write protection?

Yes, the 25C080-I/P supports hardware write protection via the WP pin in conjunction with the WPEN bit in the Status register. When WP is held low and WPEN = 1, writes to nonvolatile bits in the Status register are disabled. The WP pin has no effect when WPEN = 0, allowing flexible system-level protection schemes. This dual-control mechanism is explicitly defined in Section 2.3 and Table 3-3 of DS21230E.

What package type does the 25C080-I/P use?

The 25C080-I/P uses an 8-pin Plastic Dual In-line Package (PDIP) with 300 mil body width, as indicated by the "/P" suffix in the part number and confirmed in the Product Identification System (page DS21230E-page 19). Its mechanical dimensions comply with JEDEC MS-001, including 0.100 inch pitch, 0.360–0.385 inch length, and through-hole mounting compatibility.

Can the 25C080-I/P be used in place of the 25AA080-I/P or 25LC080-I/P?

The 25C080-I/P is not a direct drop-in replacement for 25AA080-I/P or 25LC080-I/P due to its narrower VCC range (4.5–5.5 V only) and higher maximum clock frequency (3 MHz). Substituting it into a design originally specifying 25AA080-I/P (1.8–5.5 V) risks malfunction below 4.5 V. It may function in 25LC080-I/P (2.5–5.5 V) designs only if the supply remains ≥4.5 V and timing margins accommodate 3 MHz operation.

What is the purpose of the HOLD pin on the 25C080-I/P?

The HOLD pin on the 25C080-I/P allows pausing ongoing SPI communication without resetting the internal address counter or command state. When pulled low while SCK is low, it tri-states SI, SO, and SCK inputs and suspends the serial sequence. Resuming requires bringing HOLD high while SCK is low. This feature enables deterministic interruption handling in real-time systems - for example, allowing an MCU to service a higher-priority interrupt mid-transfer and resume seamlessly, as detailed in Section 2.6 and Figure 1-1 of DS21230E.