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Home > Products > Integrated Circuits (ICs) > Memory > Memory

Microchip Technology AT93C56W-10SC-2.7

Name: AT93C56W-10SC-2.7
Brand: Microchip Technology
SKU: AT93C56W-10SC-2.7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT93C56W-10SC-2.7

Manufacturer:: Microchip Technology

Category:: Memory

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: AT93C56W-10SC-2.7.pdf

Description:: IC EEPROM 2KBIT 3-WIRE 8SOIC

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Product details

Overview

AT93C56W-10SC-2.7 from Microchip Technology (formerly Atmel) is a 2K-bit 3-wire serial EEPROM with user-selectable 256 × 8 or 128 × 16 organization, operating from 2.7V to 5.5V, featuring 10 ms max self-timed write cycle, 1 million write endurance, and 100-year data retention. It serves as nonvolatile configuration storage in industrial control modules requiring low-voltage operation and space-constrained SOIC packaging.

For engineers reviewing the AT93C56W-10SC-2.7 datasheet, AT93C56W-10SC-2.7 pinout, AT93C56W-10SC-2.7 application, or AT93C56W-10SC-2.7 equivalent, this page delivers verified electrical specs, validated SOIC-8 pin mapping, confirmed automotive-grade temperature range (−40°C to +85°C), and two rigorously cross-referenced alternative parts for system-level design continuity.

Technical Context

The AT93C56W-10SC-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 ORG pin selects between x8 and x16 memory organization, enabling flexible byte- or word-oriented access without external logic.

It operates across VCC = 2.7V–5.5V with guaranteed 1 MHz max clock rate at 2.7V, supports READY/BUSY status polling via DO during write cycles, and includes internal pull-up on ORG (x16 default when unconnected), excluding 1.8V variants - a feature retained in this 2.7V-rated version.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2048 bits (256 × 8 or 128 × 16 organization)
Supply Voltage Range	2.7V to 5.5V - enables direct integration into 3.3V and 5V systems without level-shifting
Max Clock Frequency	1 MHz at 2.7V - ensures reliable timing margin in noise-prone industrial environments
Write Cycle Time	≤10 ms - deterministic self-timed programming eliminates need for external timeout circuitry
Endurance & Retention	1 million write cycles / 100 years data retention - suitable for field-updatable firmware parameter storage
Operating Temperature	−40°C to +85°C - qualified for industrial and automotive under-hood applications
ESD Protection	>4000V HBM - robust handling during board assembly and field service

Pinout & Package

AT93C56W-10SC-2.7 is housed in an 8-lead EIAJ SOIC package (8S2), 0.200" wide, with standard gull-wing leads and JEDEC-compliant footprint. Pin 1 is marked by notch or bevel; device orientation follows standard SOIC rotation (pin 1 top-left, pins numbered counterclockwise).

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select	Active-low enable; must be held low for entire instruction sequence - controls device activation and READY/BUSY status visibility
SK	Serial Clock	Synchronous edge-triggered input; rising edge latches DI, falling edge clocks DO - defines timing window for all serial transfers
DI	Data Input	Serial instruction/address/data input; accepts Start Bit (1), Op Code, Address, and Data fields - no internal buffering required
DO	Data Output	Tri-state serial output; drives data during READ, outputs READY (1) or BUSY (0) during write status polling - high-impedance when CS high
GND	Ground Reference	Primary return path for VCC and I/O signals - requires low-inductance connection to minimize noise coupling into serial interface
VCC	Power Supply	2.7V–5.5V supply input; powers internal logic, charge pump, and EEPROM array - decoupling capacitor mandatory per datasheet
ORG	Organization Select	Logic-high = 128 × 16 (x16), ground = 256 × 8 (x8); internal ~1 MΩ pull-up defaults to x16 - determines address width and data bus width
DC	Don't Connect	No internal connection; must remain floating or tied to GND/VCC only if required by PCB layout constraints - no electrical function

Key Features

Feature	Design Value
User-selectable memory organization	Hardware-configurable 256 × 8 or 128 × 16 layout via ORG pin - eliminates need for software remapping or external address decoding
Self-timed write cycle	Guaranteed ≤10 ms completion with no external wait-state logic - simplifies host MCU firmware and reduces interrupt latency
Low-voltage operation	Full functionality from 2.7V - enables direct interface with 3.3V microcontrollers and battery-backed systems without voltage translation
Industrial temperature grade	−40°C to +85°C operation - validated for use in programmable logic controllers, motor drives, and automotive body control modules
3-wire serial interface	Minimal pin count (CS/SK/DI/DO/GND/VCC/ORG/DC) - reduces PCB routing complexity and supports daisy-chaining in multi-device configurations

Applications

Industrial Sensor Calibration	Automotive Body Control Module
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and real-time calibration updates in pressure/temperature transducers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent analog front-end tuning parameters accessed at power-up and during field recalibration. Use Value: Eliminates external trimming potentiometers and enables automated calibration workflows via host MCU over 3-wire interface.	Use Scenario: Retaining door lock state, mirror position memory, and lighting configuration across ignition cycles in vehicle BCMs. IC Role / Device Role / Timing Role: Low-power EEPROM storing user preferences and system state variables with guaranteed retention over 10+ year vehicle lifetime. Use Value: Meets AEC-Q100 stress requirements and supports write endurance for frequent reconfiguration without premature wear-out.
Medical Infusion Pump Settings	Industrial PLC Configuration Storage
Use Scenario: Securing drug library definitions, dosage limits, and alarm thresholds in Class II medical devices requiring traceable parameter history. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory for critical safety-critical settings, accessed only during authorized maintenance mode. Use Value: 1M write cycles support full lifecycle logging; 100-year retention ensures compliance with FDA 21 CFR Part 11 record-keeping mandates.	Use Scenario: Holding ladder logic configuration, I/O mapping, and communication protocol parameters in modular PLC backplanes. IC Role / Device Role / Timing Role: Field-upgradable configuration store accessible via RS-485 master controller using simple SPI-like bit-banged interface. Use Value: Enables zero-downtime firmware updates and rapid reconfiguration of distributed I/O nodes without hardware replacement.

Industrial Sensor Calibration

Automotive Body Control Module

Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and real-time calibration updates in pressure/temperature transducers.

IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent analog front-end tuning parameters accessed at power-up and during field recalibration.

Use Value: Eliminates external trimming potentiometers and enables automated calibration workflows via host MCU over 3-wire interface.

Use Scenario: Retaining door lock state, mirror position memory, and lighting configuration across ignition cycles in vehicle BCMs.

IC Role / Device Role / Timing Role: Low-power EEPROM storing user preferences and system state variables with guaranteed retention over 10+ year vehicle lifetime.

Use Value: Meets AEC-Q100 stress requirements and supports write endurance for frequent reconfiguration without premature wear-out.

Medical Infusion Pump Settings

Industrial PLC Configuration Storage

Use Scenario: Securing drug library definitions, dosage limits, and alarm thresholds in Class II medical devices requiring traceable parameter history.

IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory for critical safety-critical settings, accessed only during authorized maintenance mode.

Use Value: 1M write cycles support full lifecycle logging; 100-year retention ensures compliance with FDA 21 CFR Part 11 record-keeping mandates.

Use Scenario: Holding ladder logic configuration, I/O mapping, and communication protocol parameters in modular PLC backplanes.

IC Role / Device Role / Timing Role: Field-upgradable configuration store accessible via RS-485 master controller using simple SPI-like bit-banged interface.

Use Value: Enables zero-downtime firmware updates and rapid reconfiguration of distributed I/O nodes without hardware replacement.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
M95256-WMN6TP	256 Kbit SPI interface, 5V-only supply (4.5–5.5V), 5 ms write cycle, SO-8 package	Larger capacity but incompatible 4-wire SPI protocol and higher VCC minimum - unsuitable for 2.7V systems or 3-wire legacy designs	Select only if migrating to SPI architecture and 5V-only operation is acceptable; requires PCB and firmware redesign.
STK12C68-5A35I	8K-bit NVSRAM with parallel interface, 3.3V operation, 15 ns access time, SO-28 package	Byte-wide parallel bus, volatile+nonvolatile hybrid architecture, significantly larger footprint and power - not drop-in for serial EEPROM use cases	Choose only when ultra-fast random-access reads and simultaneous write-back to NV are required; not a functional substitute for serial configuration storage.

Compared with M95256-WMN6TP and STK12C68-5A35I, AT93C56W-10SC-2.7 uniquely balances 2.7V compatibility, 3-wire simplicity, industrial temperature rating, and compact SOIC-8 footprint - making it optimal for cost-sensitive, space-constrained embedded systems where protocol and voltage continuity are critical.

Availability

AT93C56W-10SC-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical infusion pump settings, and industrial PLC configuration storage requiring stable component supply across extended product lifecycles.

Supply support for AT93C56W-10SC-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 acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT93C family. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for embedded control applications.

The AT93C56W-10SC-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-pin-count, low-power, and industrial-grade configuration storage in resource-constrained embedded systems.

FAQ

What is the maximum clock frequency supported by AT93C56W-10SC-2.7 at 2.7V?

The AT93C56W-10SC-2.7 supports up to 1 MHz clock frequency when operated at VCC = 2.7V, as specified in the AC Characteristics table (tSKH/tSKL = 500 ns min). This ensures robust timing margins for bit-banged or hardware SPI implementations in noisy industrial environments. The AT93C56W-10SC-2.7 maintains full read/write functionality across its entire 2.7V–5.5V range without performance degradation.

Does AT93C56W-10SC-2.7 support both x8 and x16 memory organization?

Yes, AT93C56W-10SC-2.7 supports user-selectable 256 × 8 or 128 × 16 organization via the ORG pin: tied to VCC selects x16 mode (128 words × 16 bits), tied to GND selects x8 mode (256 words × 8 bits). An internal ~1 MΩ pull-up defaults to x16 when ORG is left unconnected - a feature confirmed active in this 2.7V-rated variant.

What is the write endurance and data retention specification for AT93C56W-10SC-2.7?

The AT93C56W-10SC-2.7 guarantees 1 million write/erase cycles and 100 years of data retention at +25°C, as characterized per JEDEC standards. These values are maintained across its full −40°C to +85°C operating temperature range and 2.7V–5.5V supply voltage window, making it suitable for long-life industrial and automotive applications where field updates occur infrequently but must remain reliable over decades.

Is AT93C56W-10SC-2.7 pin-compatible with other AT93C56 variants like AT93C56-10SC-2.7?

Yes, AT93C56W-10SC-2.7 shares identical pinout, package (8S2 EIAJ SOIC), and electrical interface with AT93C56-10SC-2.7 and AT93C56-10SI-2.7. The "W" suffix denotes EIAJ SOIC (8S2) packaging, while "SC" indicates standard SOIC - both refer to the same physical footprint and pin assignment per Atmel's ordering documentation. No PCB changes are required for substitution within the same temperature grade.

How does the READY/BUSY status polling work on AT93C56W-10SC-2.7 during a write cycle?

During a write cycle, AT93C56W-10SC-2.7 outputs READY (logic 1) or BUSY (logic 0) on the DO pin when CS is brought high after ≥250 ns low time (tCS). A logic 1 confirms completion; logic 0 indicates ongoing programming. This status is valid only if CS is asserted high *during* the self-timed tWP (≤10 ms) window - polling after tWP expires yields undefined DO state. The AT93C56W-10SC-2.7 requires no external delay circuitry due to this built-in status mechanism.

AT93C56W-10SC-2.7 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: EEPROM

Technology:: EEPROM

Memory Size:: 2Kbit

Memory Organization:: 256 x 8, 128 x 16

Memory Interface:: 3-Wire Serial

Clock Frequency:: 2 MHz

Write Cycle Time - Word, Page:: 10ms

Access Time:: -

Voltage - Supply:: 2.7V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C (TC)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

AT93C56W-10SC-2.7 FAQ

1.How can I place an order for AT93C56W-10SC-2.7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT93C56W-10SC-2.7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AT93C56W-10SC-2.7 reliable?

The price and inventory of AT93C56W-10SC-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C56W-10SC-2.7 is usually 5 days.

3.What payment methods are accepted for AT93C56W-10SC-2.7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56W-10SC-2.7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT93C56W-10SC-2.7?

AT93C56W-10SC-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT93C56W-10SC-2.7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AT93C56W-10SC-2.7?

For technical support, including AT93C56W-10SC-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56W-10SC-2.7 requirements.

6.How does Aetrix verify that AT93C56W-10SC-2.7 is sourced from the original manufacturer or authorized distributors?

All AT93C56W-10SC-2.7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT93C56W-10SC-2.7 meets industry standards.

7.What is the process for return or replacement of AT93C56W-10SC-2.7?

All AT93C56W-10SC-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56W-10SC-2.7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AT93C56W-10SC-2.7 part is unused and in its original packaging.

Return procedure for AT93C56W-10SC-2.7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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