Microchip Technology AT93C56AY1-10YI-2.7

Overview

AT93C56AY1-10YI-2.7 from Microchip Technology (formerly Atmel) is a 2K-bit serial EEPROM with 3-wire interface, supporting user-selectable 256 × 8 or 128 × 16 organization via the ORG pin. It operates from 2.7V to 5.5V, delivers up to 2 MHz clock rate at 5V, features self-timed write cycles (≤10 ms), and is qualified for industrial temperature range (−40°C to +85°C) in an 8-lead Miniature Array Package (MAP). It is used in embedded system configuration storage, sensor calibration data retention, and power-management parameter backup.

For engineers reviewing the AT93C56AY1-10YI-2.7 datasheet, AT93C56AY1-10YI-2.7 pinout, AT93C56AY1-10YI-2.7 application, or AT93C56AY1-10YI-2.7 equivalent, key selection considerations include voltage range compatibility (2.7–5.5 V), x8/x16 organization flexibility, automotive-grade reliability (1M write cycles, 100-year data retention), and MAP package footprint constraints in space-constrained PCB layouts.

Technical Context

The AT93C56AY1-10YI-2.7 implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, and EWDS. Its internal logic decodes 9-bit addresses for 2K-bit capacity and supports sequential read with automatic address incrementing while CS remains asserted.

Operation relies on chip-select–gated timing windows: tCS (min 250 ns), tCSS (50 ns), tDIS/tDIH (100 ns), and tPD (250 ns output delay). The ORG pin selects memory width-tied to VCC for 128 × 16 mode, grounded for 256 × 8 mode-and is not functional in 1.8V variants, but fully supported in this 2.7V version.

Key Specifications

Pinout & Package

AT93C56AY1-10YI-2.7 is housed in an 8-lead Miniature Array Package (MAP), 4.90 mm × 3.00 mm body, non-leaded, dual footprint compatible with standard SOIC layouts. Pin 1 is marked by an index area on the top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95256-DRMN6TP/K and STK12C68-55I-WH6F, AT93C56AY1-10YI-2.7 uniquely balances low-pin-count 3-wire simplicity, dual-word-width flexibility, and robust 2.7V industrial operation - making it optimal for resource-constrained embedded systems where deterministic timing and minimal I/O count are prioritized over raw speed or density.

Availability

AT93C56AY1-10YI-2.7 is available at Aetrix Electronics and suitable for motor control configuration storage, smart sensor calibration data retention, and industrial PLC I/O module identity management requiring stable component supply across extended production lifecycles.

Supply support for AT93C56AY1-10YI-2.7 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 specializing in microcontrollers, analog devices, FPGAs, and memory solutions, with a focus on embedded control and connectivity.

The AT93C56A series belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-power, pin-efficient nonvolatile storage in industrial, automotive, and consumer applications where reliability and voltage flexibility are essential.

FAQ

What is the memory organization of AT93C56AY1-10YI-2.7, and how is it selected?

The AT93C56AY1-10YI-2.7 supports two memory organizations: 256 × 8 bits or 128 × 16 bits. Selection is controlled by the ORG pin - tied to VCC for 128 × 16 mode, grounded for 256 × 8 mode. When left unconnected, the internal 1 MΩ pull-up defaults to x16 mode. This hardware-selectable configuration eliminates firmware complexity and enables reuse across different data-width architectures without changing the AT93C56AY1-10YI-2.7 part number.

Does AT93C56AY1-10YI-2.7 support 1.8 V operation?

No, AT93C56AY1-10YI-2.7 is a 2.7 V–5.5 V device, indicated by the "-2.7" suffix in its ordering code. It is not rated for 1.8 V operation. For 1.8 V compatibility, Microchip offers variants such as AT93C56AY1-10YI-1.8, which has separate DC and AC characterization for the lower voltage range and disables the ORG pin functionality.

What package type is used for AT93C56AY1-10YI-2.7, and what are its key mechanical dimensions?

AT93C56AY1-10YI-2.7 uses the 8-lead Miniature Array Package (MAP), designated as 8Y1. Its body measures 4.90 mm × 3.00 mm with 0.65 mm lead pitch. It features a dual footprint compatible with JEDEC SOIC-8 land patterns, enabling drop-in replacement in existing SOIC layouts while offering reduced height and improved thermal performance.

How does the AT93C56AY1-10YI-2.7 indicate readiness after a write operation?

After initiating a WRITE cycle, the AT93C56AY1-10YI-2.7 outputs READY/BUSY status on the DO pin when CS is brought high after ≥250 ns low time (tCS). A logic '1' on DO indicates completion; logic '0' means programming is still active. This status is valid only if CS is asserted high within the self-timed write window (≤10 ms); no status is returned if CS remains low past tWP.

Is AT93C56AY1-10YI-2.7 qualified for automotive applications?

AT93C56AY1-10YI-2.7 is specified for industrial temperature range (−40°C to +85°C) and carries automotive-grade reliability qualifications including 1 million write cycles and 100-year data retention. While not AEC-Q100 certified out-of-box, it is widely deployed in automotive subsystems such as body control modules and infotainment peripherals where extended temperature and high endurance are required - qualification testing may be performed per application-specific requirements.