Microchip Technology AT25320AY6-10YH-1.8

Overview

AT25320AY6-10YH-1.8 from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 × 8 bits, operating from 1.8 V to 5.5 V, supporting 20 MHz clock rate at 5 V, featuring 32-byte page write mode and hardware/software write protection via WP pin and status register. It is used in industrial control modules for nonvolatile parameter storage under low-power conditions.

For engineers reviewing the AT25320AY6-10YH-1.8 datasheet, AT25320AY6-10YH-1.8 pinout, AT25320AY6-10YH-1.8 application, or AT25320AY6-10YH-1.8 equivalent, key selection criteria include 1.8 V minimum supply, 8-lead MLP 2×3 mm ultra-thin DFN package, SPI Mode 0/3 compatibility, block write protection granularity, and automotive-grade temperature range (–40°C to +85°C).

Technical Context

The AT25320AY6-10YH-1.8 operates as an SPI slave device with separate SI (input) and SO (output) pins, using MSB-first transmission and requiring WREN before WRITE. Its internal architecture includes a nonvolatile status register with BP0/BP1 bits enabling 0%, 25%, 50%, or 100% array protection and WPEN bit controlling hardware write protect functionality.

It supports HOLD pin suspension of ongoing serial transfers without resetting the sequence, and integrates self-timed write cycles (≤5 ms) with no external erase required. The device uses a synchronous serial interface compliant with JEDEC-standard SPI timing for Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), though datasheet validation confirms Mode 0 operation.

Key Specifications

Pinout & Package

AT25320AY6-10YH-1.8 is packaged in an 8-lead Ultra Thin Mini-MAP (MLP 2×3 mm), a dual-no-lead DFN package with 0.50 mm pitch, footprint-compatible with space-constrained PCB layouts requiring minimal board area and low profile (<0.60 mm height).

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95320-DRMN6TP/K and BR24T32FJ-WE2, AT25320AY6-10YH-1.8 uniquely combines MLP 2×3 mm footprint, 20 MHz operation at 5 V, HOLD pin support, and automotive temperature qualification - making it optimal for space-constrained, high-speed, and thermally demanding industrial designs.

Availability

AT25320AY6-10YH-1.8 is available at Aetrix Electronics and suitable for industrial PLC modules, automotive body controllers, and medical infusion pumps requiring stable component supply across extended product lifecycles.

Supply support for AT25320AY6-10YH-1.8 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 is a global semiconductor company delivering microcontrollers, analog devices, FPGAs, and memory solutions for industrial, automotive, and communications markets.

The AT25320A series belongs to Microchip's legacy serial EEPROM product line, engineered for robust, low-voltage, SPI-based nonvolatile storage in harsh environments where reliability and long-term data integrity are critical.

FAQ

What is the maximum clock frequency supported by AT25320AY6-10YH-1.8 at 1.8 V supply?

The AT25320AY6-10YH-1.8 supports up to 5 MHz at 1.8 V, as specified in Table 1-3 AC Characteristics under "1.8–5.5 V" column. This ensures reliable SPI communication in ultra-low-power systems while maintaining timing margins across temperature and voltage extremes.

Does AT25320AY6-10YH-1.8 support SPI Mode 3 (CPOL=1, CPHA=1)?

Yes, AT25320AY6-10YH-1.8 is compatible with SPI Modes 0 and 3 per its datasheet features list. However, functional validation and timing diagrams in the official documentation are provided exclusively for Mode 0 (CPOL=0, CPHA=0), and Mode 3 operation must be verified in-system with appropriate clock polarity/phase configuration.

How does the HOLD pin function during an active write cycle in AT25320AY6-10YH-1.8?

The HOLD pin cannot suspend an internal write cycle once initiated; it only affects serial communication. During an active write (indicated by RDY=1 in status register), HOLD has no effect - commands other than RDSR are ignored until write completion. HOLD is effective only during read/write instruction framing, not during tWC.

What package type does AT25320AY6-10YH-1.8 use, and what are its key mechanical dimensions?

AT25320AY6-10YH-1.8 uses the 8-lead Ultra Thin Mini-MAP (MLP 2×3 mm) package, designated as 8Y6. Its body measures 2.00 mm × 3.00 mm with 0.50 mm pitch, total height ≤0.60 mm, and NiPdAu lead finish - optimized for high-density PCB layouts in compact industrial and automotive modules.

Can AT25320AY6-10YH-1.8 be used in automotive applications requiring AEC-Q100 qualification?

No - although AT25320AY6-10YH-1.8 is rated for –40°C to +85°C and labeled "Available in Automotive" in marketing materials, it is not AEC-Q100 qualified. For automotive applications requiring formal qualification, designers must select Microchip's dedicated AEC-Q100-compliant EEPROM variants such as the AT25320AN-10SU-1.8 in SOIC-8.