Microchip Technology 25LC080DT-E/ST

Overview

25LC080DT-E/ST from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page size, and industrial-automotive temperature support (–40°C to +125°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 configuration storage in automotive control modules.

For engineers reviewing the 25LC080DT-E/ST datasheet, 25LC080DT-E/ST pinout, 25LC080DT-E/ST application, or 25LC080DT-E/ST equivalent, key selection criteria include page-write capability (32 bytes), hardware write protection via WP pin and STATUS register, HOLD functionality for interrupt-safe SPI pausing, and AEC-Q100-relevant automotive-grade reliability (1M endurance, >200-year data retention).

Technical Context

The 25LC080DT-E/ST implements a standard SPI Mode 0,0/Master-Slave interface with separate SI (data-in) and SO (data-out) lines, requiring CS, SCK, and optional HOLD/WP control. Its internal architecture includes a page latch buffer, HV generator for EEPROM programming, and status register with WIP, WEL, BP0/BP1, and WPEN bits.

Write operations require explicit WREN instruction followed by WRITE command and address; CS must go high after final data bit to trigger self-timed 5 ms internal write cycle. Block protection allows selective write-disable of 0%, 25%, 50%, or 100% of memory array via BP0/BP1 bits, while hardware write protection engages only when WP = low AND WPEN = 1.

Key Specifications

Pinout & Package

25LC080DT-E/ST is housed in an 8-lead TSSOP package (4.4 mm body width, 0.65 mm pitch), RoHS-compliant and Pb-free, with moisture sensitivity level (MSL) 1 per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080D-I/ST, the 25LC080DT-E/ST adds automotive temperature qualification and AEC-Q100 alignment; compared with AT25080B-SSHL-T, it offers faster write cycles, integrated HOLD for robust interrupt handling, and tighter write-protection control - making it optimal for safety-critical, thermally demanding, or real-time responsive systems.

Availability

25LC080DT-E/ST is available at Aetrix Electronics and suitable for automotive control units, industrial PLCs, medical infusion pumps, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for 25LC080DT-E/ST 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, serving automotive, industrial, communications, and consumer markets with vertically integrated silicon and development tools.

The 25LC080DT-E/ST belongs to Microchip's 25XX080C/D family of SPI Serial EEPROMs, designed specifically for reliable, low-power nonvolatile storage in resource-constrained embedded systems requiring AEC-Q100-compliant components.

FAQ

What is the maximum clock frequency supported by the 25LC080DT-E/ST?

The 25LC080DT-E/ST supports up to 10 MHz SPI clock frequency when VCC is 4.5V to 5.5V. At 2.5V ≤ VCC < 4.5V, maximum clock drops to 5 MHz, and at 1.8V ≤ VCC < 2.5V (not applicable to this part), it would be 3 MHz. The 25LC080DT-E/ST is specified for 2.5–5.5V operation, so its usable max clock is 10 MHz at nominal 5V supply - confirmed in Table 1-2, Param No. 1 (FCLK).

Does the 25LC080DT-E/ST have a HOLD pin, and how is it used?

Yes, the 25LC080DT-E/ST includes a dedicated HOLD pin (Pin 7) that pauses ongoing SPI communication without resetting the internal state. To activate HOLD, the pin must be pulled low while SCK is low; transitions on SI, SO, and SCK are then ignored until HOLD returns high (also while SCK is low). This feature allows the host MCU to service urgent interrupts and resume exactly where it left off - a capability explicitly documented in Section 2.1 and Figure 1-1 of DS22151B.

What is the page size of the 25LC080DT-E/ST, and why does it matter for write operations?

The 25LC080DT-E/ST has a 32-byte page size, as confirmed in the Device Selection Table and Section 2.3. This means up to 32 bytes can be written in a single page-write command - but all bytes must reside within the same physical page (addresses 000h–01Fh, 020h–03Fh, etc.). Crossing a page boundary causes wraparound, overwriting earlier bytes in the page. Proper software address alignment is therefore essential to avoid unintended data corruption during bulk writes.

How does hardware write protection work on the 25LC080DT-E/ST?

Hardware write protection on the 25LC080DT-E/ST requires both the WP pin (Pin 3) to be low AND the WPEN bit (bit 7 of STATUS register) to be set to 1. When both conditions are met, writes to nonvolatile STATUS register bits (BP0, BP1, WPEN) are blocked - though memory array writes remain enabled unless also disabled via BP bits. This dual-condition design allows safe board-level WP grounding while retaining field configurability of protection levels via software.

Is the 25LC080DT-E/ST qualified for automotive applications, and what evidence supports this?

Yes, the "E" suffix in 25LC080DT-E/ST denotes Automotive temperature grade (–40°C to +125°C), explicitly listed in the Device Selection Table and Table 1-2 AC Characteristics. While DS22151B does not carry full AEC-Q100 test reports, Microchip qualifies "E"-grade parts to automotive reliability standards including 1M endurance and >200-year data retention - and the part is widely deployed in automotive ECUs. The TSSOP package (ST suffix) is also approved for automotive assembly per Microchip's packaging specifications.