Microchip Technology 25AA080D-I/WF16K

Overview

25AA080D-I/WF16K from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page write capability, 1.8–5.5 V supply range, and industrial temperature rating (–40°C to +85°C). It interfaces via standard SPI bus (CS/SI/SO/SCK/HOLD/WP), supports hardware write protection, and targets firmware storage, calibration data retention, and configuration memory in embedded control systems.

For engineers reviewing the 25AA080D-I/WF16K datasheet, 25AA080D-I/WF16K pinout, 25AA080D-I/WF16K application, or 25AA080D-I/WF16K equivalent, key selection criteria include page size (32 B), V_CC min (1.8 V), HOLD functionality for interrupt-safe operation, and WPEN-controlled hardware write protection - all critical for low-voltage, mission-critical nonvolatile storage designs.

Technical Context

The 25AA080D-I/WF16K implements a synchronous serial interface compliant with SPI Mode 0,0 and Mode 1,1, using rising-edge SI sampling and falling-edge SO output timing. Its internal architecture includes a 32-byte page latch, status register with WIP/WEL/BP0/BP1 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 within 32-byte physical pages (000h–01Fh, 020h–03Fh, etc.), and crossing boundaries wraps data to the start of the current page. Built-in power-on reset clears the write enable latch, and HOLD suspends ongoing transfers while maintaining internal state.

Key Specifications

Pinout & Package

25AA080D-I/WF16K is packaged in an 8-lead TDFN (2 mm × 3 mm, 0.5 mm pitch), RoHS-compliant, with wettable flank leads for automated optical inspection. The package is marked "C41" per Microchip's marking convention for 25AA080D I-temp devices in TDFN.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA080T-I/MS, the 25AA080D-I/WF16K offers superior thermal performance and smaller footprint in TDFN, while AT25080B-SSHL-T trades voltage flexibility and endurance for legacy compatibility - making the 25AA080D-I/WF16K optimal for next-generation compact, low-power industrial controllers.

Availability

25AA080D-I/WF16K is available at Aetrix Electronics and suitable for industrial sensor nodes, medical diagnostic devices, smart energy meters, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for 25AA080D-I/WF16K 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 25AA080D belongs to Microchip's 25XX080 family of SPI Serial EEPROMs, engineered for robust, low-power nonvolatile storage in cost-sensitive embedded systems where reliability, wide voltage operation, and SPI interoperability are mandatory.

FAQ

What is the maximum clock frequency supported by the 25AA080D-I/WF16K across its full voltage range?

The 25AA080D-I/WF16K supports up to 10 MHz at V_CC ≥ 4.5 V, 5 MHz at 2.5 V ≤ V_CC < 4.5 V, and 3 MHz at 1.8 V ≤ V_CC < 2.5 V. These graded limits ensure setup/hold timing margins are maintained across process and temperature variations. All timing parameters in DS22151B Table 1-2 are specified per voltage bin, and the 25AA080D-I/WF16K must operate within these bounds to guarantee reliable communication. The 25AA080D-I/WF16K does not support overclocking beyond these values.

How does the HOLD function behave during an active write cycle in the 25AA080D-I/WF16K?

The HOLD pin has no effect during an internal write cycle (TWC) in the 25AA080D-I/WF16K - once CS goes high after a WRITE command, the device ignores HOLD transitions until the write completes and returns to standby. HOLD only suspends ongoing SPI transfers (reads, writes, status reads) that are actively clocked; it cannot pause or abort an in-progress erase/write operation. This behavior is explicitly documented in Section 2.8 and Figure 1-1 of DS22151B.

Can the 25AA080D-I/WF16K be used in a system powered by a 1.8 V rail without level shifters?

Yes, the 25AA080D-I/WF16K is fully specified for 1.8 V operation: DC characteristics (D002/D003), AC timing (Table 1-2), and functional operation are all validated at V_CC = 1.8 V. Its VIH1 threshold is 0.7×V_CC (1.26 V), and VIL2 is 0.2×V_CC (0.36 V), matching typical 1.8 V GPIO logic levels. No level shifting is required when interfacing with 1.8 V microcontrollers such as the PIC16LF19xx or STM32L0 series, provided layout follows Microchip's SPI routing guidelines.

What happens if a page write crosses a 32-byte boundary in the 25AA080D-I/WF16K?

If a page write command attempts to cross a 32-byte boundary (e.g., writing 10 bytes starting at address 0x01E), the 25AA080D-I/WF16K wraps the excess data to the start of the same page (0x000), overwriting previously loaded bytes. This behavior is defined in Section 2.3 and Figure 2-3 of DS22151B. Software must enforce page alignment - either by truncating writes at boundaries or splitting commands - to prevent unintended data corruption. The 25AA080D-I/WF16K does not auto-align or reject misaligned writes.

Is the 25AA080D-I/WF16K pin-compatible with the 25LC080D series?

Yes, the 25AA080D-I/WF16K shares identical pinout, instruction set, timing, and package dimensions with the 25LC080D series (e.g., 25LC080D-I/SN), differing only in V_CC range (1.8–5.5 V vs. 2.5–5.5 V) and some DC specs. Both use the same 8-pin TDFN footprint and electrical interface. However, substituting 25AA080D-I/WF16K into a 25LC080D design enables 1.8 V operation but requires verification that downstream logic tolerates the wider voltage margin - especially for WP and HOLD input thresholds.