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

Microchip Technology AT93C56-10SI-2.5

Name: AT93C56-10SI-2.5
Brand: Microchip Technology
SKU: AT93C56-10SI-2.5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT93C56-10SI-2.5

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: AT93C56-10SI-2.5.pdf

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

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Product details

Overview

AT93C56-10SI-2.5 from Microchip Technology (formerly Atmel) is a 2K-bit serial EEPROM with 3-wire interface, configurable as 256 × 8 or 128 × 16 organization via ORG pin, operating at V_CC = 2.5V to 5.5V, and rated for industrial temperature range (−40°C to +85°C). It delivers 1 million write cycles, 100-year data retention, and supports self-timed 10 ms max write cycles in embedded control and sensor calibration applications.

For engineers reviewing the AT93C56-10SI-2.5 datasheet, AT93C56-10SI-2.5 pinout, AT93C56-10SI-2.5 application, or AT93C56-10SI-2.5 equivalent, key selection criteria include low-voltage operation down to 2.5V, industrial-grade reliability, user-selectable x8/x16 memory mapping, 3-wire serial timing compatibility, and SOIC-8 package compatibility with legacy board layouts.

Technical Context

The AT93C56-10SI-2.5 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 architecture uses an ORG pin to select between 256-word × 8-bit or 128-word × 16-bit organization, with internal pull-up enabling x16 mode if ORG is unconnected.

Operation requires explicit Erase/Write Enable (EWEN) before programming; all writes are self-timed with READY/BUSY status reported on DO when CS is asserted post-command. The device supports clock frequencies up to 2 MHz at 5V and scales down to 500 kHz at 2.5V, with AC timing parameters fully characterized across the industrial temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2048 bits (256 × 8 or 128 × 16 configuration)
Supply Voltage Range	2.5V to 5.5V - enables direct integration into 2.5V/3.3V systems without level-shifting
Write Cycle Time	≤10 ms - deterministic self-timed erase-and-write eliminates external timing control
Endurance	1,000,000 write cycles - supports frequent field updates in calibration or configuration storage
Data Retention	100 years at 25°C - ensures long-term firmware parameter integrity over product lifetime
Operating Temperature	−40°C to +85°C - qualified for industrial and automotive under-hood environments
ESD Protection	>4000V HBM - robust handling during assembly and field service

Pinout & Package

AT93C56-10SI-2.5 is housed in an 8-lead JEDEC SOIC (8S1) package, 0.150" wide, with standard gull-wing lead form and 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant and moisture-sensitive level 3.

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select	Active-low enable: must be held low for entire instruction cycle; high state places DO in high-impedance or outputs READY/BUSY
SK	Serial Clock	Synchronous edge-triggered input; rising edge latches DI, falling edge clocks DO; frequency ≤2 MHz at 5V, ≤500 kHz at 2.5V
DI	Data Input	Serial command and address/data input; accepts 7-bit address + opcode for READ/WRITE/ERASE operations
DO	Data Output	Open-drain output; returns read data or READY/BUSY status ('1' = ready, '0' = busy) when CS is high post-write
GND	Ground Reference	Primary return path for V_CC and I/O; requires low-impedance PCB connection to minimize noise coupling
V_CC	Power Supply	Single supply input; decoupling capacitor (0.1 µF ceramic) required within 10 mm of pin
ORG	Organization Select	Logic-high selects 128 × 16 mode; logic-low selects 256 × 8 mode; internal ~1 MΩ pull-up defaults to x16 if left open
DC	No Connect	Internally unused; must remain floating or tied to GND/V_CC per layout best practice - no electrical function

Key Features

Feature	Design Value
User-selectable memory organization	Hardware-configurable 256 × 8 or 128 × 16 via ORG pin - eliminates software rework when changing data width requirements
Multi-voltage operation	2.5V–5.5V supply range - interoperable with 2.5V, 3.3V, and 5V host controllers without external regulators
Self-timed write cycle	No external wait-state generation needed - simplifies firmware design and reduces CPU overhead during nonvolatile writes
Industrial temperature rating	−40°C to +85°C operation - validated for use in motor control, power supplies, and industrial PLC modules
High-reliability nonvolatile storage	1M write cycles and 100-year retention - suitable for infrequent but mission-critical parameter storage (e.g., calibration coefficients)

Applications

Motor Control Calibration	Industrial Sensor Configuration
Use Scenario: Storing factory-trimmed gain/offset values and runtime calibration data for BLDC motor drivers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during boot and periodic recalibration; communicates via 3-wire SPI-like interface synchronized to host MCU clock. Use Value: Enables field-updatable motor profiles without requiring flash reprogramming; 2.5V operation matches low-power MCU supply rails.	Use Scenario: Holding sensor linearization tables and environmental compensation coefficients in pressure/temperature transmitters. IC Role / Device Role / Timing Role: Serial EEPROM providing persistent storage for sensor-specific correction data; accessed during initialization and maintenance mode. Use Value: Supports 1M write cycles for repeated field recalibration; industrial temp rating ensures stability across operating environment.
Embedded Power Supply Settings	Medical Device Configuration
Use Scenario: Saving user-defined voltage/current limits, soft-start parameters, and fault thresholds in programmable DC power supplies. IC Role / Device Role / Timing Role: Configuration memory interfaced to microcontroller over minimal 3-wire bus; retains settings across AC power cycles. Use Value: Eliminates need for larger SPI Flash; 10 ms write time allows fast save-on-exit without blocking critical control loops.	Use Scenario: Storing device-specific safety parameters, usage logs, and regulatory compliance flags in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, long-life nonvolatile memory for audit-trail and configuration data; accessed only during setup or firmware update. Use Value: 100-year data retention meets medical device shelf-life requirements; ESD >4kV protects against handling damage during assembly.

Motor Control Calibration

Industrial Sensor Configuration

Use Scenario: Storing factory-trimmed gain/offset values and runtime calibration data for BLDC motor drivers.

IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during boot and periodic recalibration; communicates via 3-wire SPI-like interface synchronized to host MCU clock.

Use Value: Enables field-updatable motor profiles without requiring flash reprogramming; 2.5V operation matches low-power MCU supply rails.

Use Scenario: Holding sensor linearization tables and environmental compensation coefficients in pressure/temperature transmitters.

IC Role / Device Role / Timing Role: Serial EEPROM providing persistent storage for sensor-specific correction data; accessed during initialization and maintenance mode.

Use Value: Supports 1M write cycles for repeated field recalibration; industrial temp rating ensures stability across operating environment.

Embedded Power Supply Settings

Medical Device Configuration

Use Scenario: Saving user-defined voltage/current limits, soft-start parameters, and fault thresholds in programmable DC power supplies.

IC Role / Device Role / Timing Role: Configuration memory interfaced to microcontroller over minimal 3-wire bus; retains settings across AC power cycles.

Use Value: Eliminates need for larger SPI Flash; 10 ms write time allows fast save-on-exit without blocking critical control loops.

Use Scenario: Storing device-specific safety parameters, usage logs, and regulatory compliance flags in portable diagnostic equipment.

IC Role / Device Role / Timing Role: Secure, long-life nonvolatile memory for audit-trail and configuration data; accessed only during setup or firmware update.

Use Value: 100-year data retention meets medical device shelf-life requirements; ESD >4kV protects against handling damage during assembly.

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 (4-wire), 2.5V–5.5V, 5ms write cycle, SO-8 package	Higher density, faster write, but requires SPI master with 4-wire support instead of 3-wire	Select when migrating to higher-capacity storage and existing design supports SPI protocol stack
STK12C68-5BI	8K-bit NVSRAM, parallel interface, 4.5V–5.5V only, battery-backed, SO-28 package	Byte-level random access and SRAM-like speed, but larger footprint and no low-voltage support	Select when ultra-fast read/write and volatile/nonvolatile hybrid operation are required, and board space permits SO-28

Compared with M95256-WMN6TP and STK12C68-5BI, the AT93C56-10SI-2.5 offers optimal balance of low-pin-count 3-wire simplicity, 2.5V compatibility, industrial temperature range, and proven reliability for cost-sensitive embedded systems where 2K-bit capacity suffices.

Availability

AT93C56-10SI-2.5 is available at Aetrix Electronics and suitable for motor control calibration, industrial sensor configuration, embedded power supply settings, medical device configuration, and industrial PLC firmware parameter storage requiring stable component supply across extended production lifecycles.

Supply support for AT93C56-10SI-2.5 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 broad industrial and automotive qualification expertise.

The AT93C56-10SI-2.5 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 memory organization of AT93C56-10SI-2.5?

The AT93C56-10SI-2.5 provides 2048 bits of serial EEPROM organized as either 256 words × 8 bits or 128 words × 16 bits, selected by the logic level applied to the ORG pin. When ORG is tied to V_CC, the x16 mode is active; when grounded, x8 mode is selected. An internal pull-up (~1 MΩ) defaults to x16 if ORG is left unconnected. This configuration is fixed at power-on and does not require software initialization.

Does AT93C56-10SI-2.5 support 2.5V-only operation?

Yes, AT93C56-10SI-2.5 is explicitly rated for V_CC = 2.5V to 5.5V operation, making it compatible with 2.5V logic systems without level translation. Its AC characteristics-including maximum clock frequency (500 kHz), tSKH/tSKL (500 ns), and tWP (10 ms)-are fully specified and guaranteed across this full voltage range, including at the 2.5V minimum.

How is write protection implemented on AT93C56-10SI-2.5?

AT93C56-10SI-2.5 uses instruction-based write protection: the Erase/Write Enable (EWEN) instruction must be issued before any ERASE or WRITE command, and Erase/Write Disable (EWDS) disables all programming functions. READ remains always enabled. No hardware write-protect pin is present; protection relies entirely on correct command sequencing and software discipline to prevent accidental writes.

What package type is used for AT93C56-10SI-2.5?

AT93C56-10SI-2.5 is supplied in an 8-lead JEDEC-standard SOIC package (designated 8S1), 0.150" wide, with gull-wing leads and 1.27 mm pitch. This package is pin-compatible with industry-standard 8-pin SOIC footprints and supports reflow soldering per J-STD-020. The "SI" suffix in the part number explicitly denotes this SOIC-8 industrial-grade variant.

Can AT93C56-10SI-2.5 be used in automotive applications?

AT93C56-10SI-2.5 is qualified for industrial temperature range (−40°C to +85°C) and meets AEC-Q200 stress test requirements for passive components, but it is not officially AEC-Q100 qualified as an integrated circuit. For automotive applications requiring full AEC-Q100 compliance, Microchip offers the AT93C56-10XU-2.5 (AEC-Q100 Grade 2, −40°C to +105°C); the AT93C56-10SI-2.5 may be used in non-safety-critical automotive subsystems subject to customer qualification.

AT93C56-10SI-2.5 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:: 2.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

AT93C56-10SI-2.5 FAQ

1.How can I place an order for AT93C56-10SI-2.5 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT93C56-10SI-2.5 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 AT93C56-10SI-2.5 reliable?

The price and inventory of AT93C56-10SI-2.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C56-10SI-2.5 is usually 5 days.

3.What payment methods are accepted for AT93C56-10SI-2.5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56-10SI-2.5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT93C56-10SI-2.5?

AT93C56-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT93C56-10SI-2.5 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 AT93C56-10SI-2.5?

For technical support, including AT93C56-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56-10SI-2.5 requirements.

6.How does Aetrix verify that AT93C56-10SI-2.5 is sourced from the original manufacturer or authorized distributors?

All AT93C56-10SI-2.5 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 AT93C56-10SI-2.5 meets industry standards.

7.What is the process for return or replacement of AT93C56-10SI-2.5?

All AT93C56-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56-10SI-2.5, 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 AT93C56-10SI-2.5 part is unused and in its original packaging.

Return procedure for AT93C56-10SI-2.5:

1.Submit a request within 90 days.

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

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