Microchip Technology AT93C56AY6-10YH-1.8

Overview

AT93C56AY6-10YH-1.8 from Microchip Technology (formerly Atmel) is a 2 Kbit serial EEPROM with three-wire interface, supporting 1.8V to 5.5V operation, user-selectable 256 × 8 or 128 × 16 organization via ORG pin, and self-timed write cycles ≤10 ms. It delivers 1 million write endurance and 100-year data retention for configuration storage in industrial control modules, automotive body electronics, and embedded sensor nodes.

For engineers reviewing the AT93C56AY6-10YH-1.8 datasheet, AT93C56AY6-10YH-1.8 pinout, AT93C56AY6-10YH-1.8 application, or AT93C56AY6-10YH-1.8 equivalent, key selection criteria include low-voltage compatibility (1.8V min), ultra-thin MLP 2×3 mm package (8Y6), NC/ORG pin behavior, and Ready/Busy status reporting via DO during write cycles.

Technical Context

The AT93C56AY6-10YH-1.8 implements a synchronous three-wire serial interface (CS/SK/DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL. Its internal architecture supports dual memory organizations selected by ORG pin state - logic high enables 128-word × 16-bit mode, ground enables 256-word × 8-bit mode.

It operates across −40°C to +85°C industrial temperature range with standby current as low as 0.4 µA at 1.8V, and features built-in write protection via Erase/Write Disable (EWDS) state that persists until explicitly re-enabled by EWEN. The device outputs Ready/Busy status on DO when CS is asserted post-write initiation, enabling host polling without fixed delay timing.

Key Specifications

Pinout & Package

AT93C56AY6-10YH-1.8 uses the 8-lead Ultra Thin mini-MAP (MLP 2×3 mm) package (ordering code suffix "Y6"), with 0.50 mm pitch, dual no-lead construction, and exposed thermal pad (non-electrical, optional grounding).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT93C56AY6-10YH-1.8, the AT93C56B-10YH-1.8 offers identical functionality with improved process reliability, while the M95256-DRMN6TP/K provides greater density and speed at the cost of interface redesign and larger footprint - neither is pin-compatible, but both serve overlapping configuration-storage roles.

Availability

AT93C56AY6-10YH-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and medical infusion pump settings requiring stable component supply across extended product lifecycles.

Supply support for AT93C56AY6-10YH-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 specializing in microcontrollers, analog components, and nonvolatile memory solutions, with broad industrial and automotive qualifications.

The AT93C56A series was designed for low-power, space-constrained embedded systems requiring reliable serial configuration storage - particularly where 1.8V operation, small footprint, and hardware-selectable memory width are critical.

FAQ

What is the operating voltage range for the AT93C56AY6-10YH-1.8?

The AT93C56AY6-10YH-1.8 operates from 1.8V to 5.5V, supporting direct integration into 1.8V logic domains without level shifters. This low-voltage capability is confirmed in DC Characteristics Table 3-2 (VCC1 parameter), and enables use in battery-powered and energy-efficient systems where supply rails may dip below 2.7V.

How does the ORG pin affect memory organization in the AT93C56AY6-10YH-1.8?

The ORG pin on the AT93C56AY6-10YH-1.8 selects between two memory configurations: tied to VCC enables 128 words × 16 bits, tied to GND enables 256 words × 8 bits. If left unconnected, the internal 1 MΩ pull-up defaults to x16 mode. This hardware-selectable organization is documented in the Functional Description section and Figure 3-1 block diagram.

Does the AT93C56AY6-10YH-1.8 support sequential read operations?

Yes, the AT93C56AY6-10YH-1.8 supports sequential read: after a READ instruction, holding CS high causes automatic address increment and continuous data output on DO without dummy bits between words. This behavior is specified in the Functional Description section and enables efficient bulk configuration retrieval in minimal clock cycles.

What is the maximum clock frequency supported by the AT93C56AY6-10YH-1.8?

The AT93C56AY6-10YH-1.8 supports up to 2 MHz SK clock frequency at VCC = 5.0V, as stated in the Features list and AC Characteristics Table 3-3 (fSK parameter). At lower voltages (1.8V–2.7V), the maximum clock rate reduces to 0.25 MHz, ensuring timing margin across the full operating range.

Is the AT93C56AY6-10YH-1.8 RoHS compliant and lead-free?

Yes, the AT93C56AY6-10YH-1.8 is RoHS compliant and lead-free, as indicated by the "H" suffix in the part number (per Ordering Information Note 3: "H designates Green package + RoHS compliant, with NiPdAu Lead Finish") and confirmed in Package Drawing 8Y6 documentation.