Microchip Technology AT93C56AY1-10YI-1.8

Overview

AT93C56AY1-10YI-1.8 from Microchip Technology (formerly Atmel) is a 2 Kbit serial EEPROM with 3-wire interface, supporting 256 × 8 or 128 × 16 organization selectable via ORG pin, 1.8 V to 5.5 V supply range, and automotive-grade industrial temperature operation (–40°C to +85°C). It delivers 1 million write cycles, 100-year data retention, and self-timed 10 ms max write cycle - used in embedded system configuration storage, sensor calibration data logging, and power-management parameter backup.

For engineers reviewing the AT93C56AY1-10YI-1.8 datasheet, AT93C56AY1-10YI-1.8 pinout, AT93C56AY1-10YI-1.8 application, or AT93C56AY1-10YI-1.8 equivalent, key selection considerations include low-voltage compatibility down to 1.8 V, dual-word-width flexibility, TSSOP-compatible 8-lead MAP package (8Y1), sequential read capability, and READY/BUSY status reporting via DO pin during write/erase operations.

Technical Context

The AT93C56AY1-10YI-1.8 implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Its internal organization is dynamically selected by the ORG pin state: tied to VCC for 128 × 16 mode or GND for 256 × 8 mode - no pull-up dependency in 1.8 V versions.

It operates across 1.8 V to 5.5 V with guaranteed AC timing at 0.25 MHz minimum clock rate (fSK) under 1.8 V conditions, features input leakage ≤3.0 µA, standby current as low as 0.1 µA at 1.8 V, and supports status polling via DO pin after CS assertion during write/erase cycles.

Key Specifications

Pinout & Package

AT93C56AY1-10YI-1.8 uses an 8-lead Miniature Array Package (MAP), 4.90 mm × 3.00 mm body, non-leaded, dual-footprint compatible with SOIC/TSSOP footprints - optimized for space-constrained PCB layouts while maintaining hand-solderability and reflow compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95256-DRMN3TP/K and STK12C68-5LH1T, the AT93C56AY1-10YI-1.8 offers minimal pin count (8-pin MAP), lowest standby current (0.1 µA), and hardware-configurable word width - making it optimal for cost-sensitive, space-constrained, ultra-low-power designs where 2 Kbit capacity suffices and 3-wire simplicity is preferred over SPI or parallel interfaces.

Availability

AT93C56AY1-10YI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded configuration storage, and automotive body control module applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

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

The AT93C56AY1-10YI-1.8 belongs to Microchip's legacy Atmel serial EEPROM product line, designed specifically for low-power, pin-efficient configuration and calibration storage in industrial, automotive, and consumer electronics.

FAQ

What is the memory organization flexibility of the AT93C56AY1-10YI-1.8?

The AT93C56AY1-10YI-1.8 supports user-selectable internal organization: 256 × 8 bits when the ORG pin is grounded, or 128 × 16 bits when ORG is connected to VCC. Unlike higher-voltage variants, the 1.8 V version does not feature an internal pull-up on ORG - the pin must be actively driven to ensure reliable configuration. This hardware-selectable mode eliminates software overhead for address translation.

Does the AT93C56AY1-10YI-1.8 support sequential read operations?

Yes, the AT93C56AY1-10YI-1.8 supports sequential read: once a READ instruction is issued with a starting address, holding CS low allows continuous clocking of SK to output successive memory locations without reissuing the address. A dummy '0' bit precedes the first data word but is omitted between subsequent words - enabling efficient bulk data retrieval with minimal host intervention.

What is the guaranteed write endurance and data retention for the AT93C56AY1-10YI-1.8?

The AT93C56AY1-10YI-1.8 is rated for 1 million write/erase cycles and 100 years of data retention at +85°C. These specifications are production-tested and guaranteed across the full industrial temperature range (–40°C to +85°C), ensuring long-term reliability in applications such as sensor calibration storage and configuration backup where field updates occur infrequently but must remain valid for product lifetime.

How does the AT93C56AY1-10YI-1.8 indicate readiness during a write cycle?

The AT93C56AY1-10YI-1.8 uses the DO pin to report READY/BUSY status: after initiating a WRITE or ERASE instruction, if CS is brought high for ≥250 ns (tCS), DO outputs '0' while programming is active and '1' when complete. This polling mechanism eliminates need for fixed delay timers and allows precise synchronization with host firmware - a core feature confirmed in the device's functional description and timing diagrams.

What package type is used by the AT93C56AY1-10YI-1.8 and what are its layout advantages?

The AT93C56AY1-10YI-1.8 uses an 8-lead Miniature Array Package (MAP), designated 8Y1, measuring 4.90 mm × 3.00 mm. Its dual-footprint design matches both SOIC and TSSOP land patterns, easing migration from legacy packages. The non-leaded construction improves thermal performance and solder joint reliability, while the compact size saves PCB area in space-constrained applications like portable instrumentation and automotive ECUs.