Microchip Technology 25LC080D-E/SN

Overview

25LC080D-E/SN from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page write capability, 10 MHz max clock frequency, and industrial/automotive temperature support (−40°C to +125°C). It operates from 2.5V–5.5V and delivers 5 mA read/write current at 5.5V, enabling nonvolatile data storage in microcontroller-based embedded control systems.

For engineers reviewing the 25LC080D-E/SN datasheet, 25LC080D-E/SN pinout, 25LC080D-E/SN application, or 25LC080D-E/SN equivalent, key selection criteria include page size (32 bytes), HOLD/CS timing margins, WPEN-controlled hardware write protection, and automotive-grade reliability (1M endurance, >200-year data retention).

Technical Context

The 25LC080D-E/SN implements a standard SPI Mode 0,0 interface with separate SI (data in) and SO (data out) lines, requiring CS assertion, SCK synchronization, and optional HOLD suspension. Its internal architecture includes a write-enable latch, STATUS register (WIP/WEL/BP0/BP1), and high-voltage generator for EEPROM cell programming.

Write operations are page-limited (32 bytes per page, boundaries at 0x000, 0x020, ..., 0x3E0), with self-timed internal cycles completing in ≤5 ms. Block protection supports none/¼/½/all array segments via BP0/BP1 bits, while hardware write protection engages only when WP = low AND WPEN = 1.

Key Specifications

Pinout & Package

25LC080D-E/SN is packaged in an 8-lead SOIC (SN) with 150-mil width, RoHS-compliant matte tin finish, and JEDEC-standard footprint (pitch: 1.27 mm). The package supports reflow soldering and meets IPC/JEDEC J-STD-020 moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080D-I/SN, the 25LC080D-E/SN adds automotive qualification and extended high-temp operation, while AT25DF041A-SHN-T trades EEPROM simplicity for higher density at the cost of erase latency and reduced endurance predictability.

Availability

25LC080D-E/SN is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, medical diagnostics, and smart metering applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.

Supply support for 25LC080D-E/SN 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 components, and memory solutions, serving industrial, automotive, and consumer markets with integrated silicon and development tools.

The 25LC080D-E/SN belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-power, SPI-compatible nonvolatile storage in resource-constrained embedded systems requiring guaranteed write endurance and long data retention.

FAQ

What is the maximum clock frequency supported by the 25LC080D-E/SN?

The 25LC080D-E/SN supports up to 10 MHz SPI clock frequency when VCC is 4.5V–5.5V. At 2.5V–4.5V, the maximum clock drops to 5 MHz, and at 1.8V–2.5V (not applicable to this part), it would be 3 MHz. These limits ensure setup/hold timing margins are met across voltage and temperature ranges, as verified in Table 1-2 of DS22151B.

Does the 25LC080D-E/SN require external pull-up resistors on its SO or SI lines?

No, the 25LC080D-E/SN does not require external pull-ups on SO or SI. Its SO pin is actively driven (not open-drain) and SI is a standard CMOS input. Pull-ups may be used for bus contention resolution in multi-slave SPI configurations, but they are not required for basic operation per the device's DC characteristics and functional description in DS22151B.

How does the HOLD function operate on the 25LC080D-E/SN during an active SPI transaction?

The HOLD pin on the 25LC080D-E/SN suspends SPI communication mid-transaction when pulled low while SCK is low. All inputs (SI, SCK, CS) are ignored except CS, and SO enters high-impedance. To resume, HOLD must be raised while SCK remains low. This preserves internal state, eliminating the need to restart commands - critical for real-time interrupt handling in MCUs interfacing with 25LC080D-E/SN.

Can the 25LC080D-E/SN be used with a 3.3V microcontroller SPI interface?

Yes, the 25LC080D-E/SN is fully compatible with 3.3V SPI interfaces. Its VCC range is 2.5V–5.5V, VIH1 threshold is 0.7×VCC (≥2.31V at 3.3V), and VOL1 is ≤0.4V at 2.1 mA - all meeting standard 3.3V LVTTL logic levels. No level-shifting is required when VCC = 3.3V, as confirmed in DC Characteristics Table 1-1 of DS22151B.

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

After a successful WRITE instruction completes (i.e., CS rises after the final data bit), the write enable latch in the 25LC080D-E/SN is automatically reset. This prevents unintended subsequent writes and enforces explicit WREN issuance before each new write sequence - a safety mechanism documented in Section 2.3 and Figure 2-2 of DS22151B. Power-up and WRDI also reset this latch.