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

Microchip Technology AT93C56A-10SI-1.8

Name: AT93C56A-10SI-1.8
Brand: Microchip Technology
SKU: AT93C56A-10SI-1.8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AT93C56A-10SI-1.8

Manufacturer:: Microchip Technology

Category:: Memory

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

Datasheet:: AT93C56A-10SI-1.8.pdf

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

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Product details

Overview

AT93C56A-10SI-1.8 from Microchip Technology (formerly Atmel) is a 2 Kbit serial EEPROM with 3-wire interface, configurable 256 × 8 or 128 × 16 organization 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 and 100-year data retention in an 8-lead JEDEC SOIC package for embedded system configuration storage.

For engineers reviewing the AT93C56A-10SI-1.8 datasheet, AT93C56A-10SI-1.8 pinout, AT93C56A-10SI-1.8 application, or AT93C56A-10SI-1.8 equivalent, key selection criteria include low-voltage operation down to 1.8 V, self-timed 10 ms max write cycle, sequential read capability, 2 MHz clock rate at 5 V, and support for both x8/x16 memory mapping via external ORG pin control.

Technical Context

The AT93C56A-10SI-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. Memory access is initiated by rising-edge CS activation followed by start bit and opcode.

Internal organization is user-selectable: ORG = VCC selects 128 × 16 (16-bit words), ORG = GND selects 256 × 8 (8-bit words); unconnected ORG defaults to x16 due to internal 1 MΩ pull-up. The device operates across 1.8 V–5.5 V with separate DC/AC timing specifications per voltage range and supports READY/BUSY status polling via DO during write/erase operations.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	2048 bits (256 × 8 or 128 × 16 configuration)
Supply Voltage Range	1.8 V to 5.5 V - enables direct interfacing with 1.8 V logic and mixed-voltage systems without level shifters
Write Cycle Time	Max 10 ms at 4.5–5.5 V - fully self-timed; no external delay or erase step required before write
Endurance	1 million write cycles - supports frequent firmware parameter updates in field-deployed devices
Data Retention	100 years at 25°C - ensures long-term reliability for calibration data, serial numbers, and configuration settings
Interface Clock Rate	2 MHz maximum at 5 V - provides sufficient throughput for boot-time configuration loading
Operating Temperature	−40°C to +85°C - qualified for industrial and automotive under-hood applications
Package	8-lead JEDEC SOIC (8S1), 150-mil width - standard footprint compatible with automated SMT assembly

Pinout & Package

AT93C56A-10SI-1.8 is housed in an 8-lead JEDEC SOIC (8S1) package measuring 4.80–5.00 mm × 5.79–6.20 mm × 1.35–1.75 mm, with gull-wing leads and 1.27 mm pitch. Pin 1 is marked by a notch or beveled corner.

Pin/Terminal	Circuit Role	Design Meaning
CS	Chip Select	Active-low enable signal; must be held high during self-timed write to poll READY/BUSY on DO
SK	Serial Clock	Input clock synchronizing all data transfers; min/max pulse widths defined per VCC range
DI	Data Input	Serial command and address input; accepts 7-bit opcodes and 9-bit (x8) or 8-bit (x16) addresses
DO	Data Output	Tri-state serial output; outputs data during READ, READY/BUSY status during programming
VCC	Power Supply	1.8 V–5.5 V supply; decoupling capacitor required near pin for noise immunity
GND	Ground	Reference return path for all signals and power; must be low-impedance connection
ORG	Organization Select	Configures memory map: tied to VCC → 128×16, tied to GND → 256×8; not functional on 1.8 V-only variants per datasheet note
DC	Don't Connect	No internal connection; must remain floating or grounded - no drive or load permitted

Key Features

Feature	Design Value
Low-voltage operation	Functional down to 1.8 V supply - eliminates need for voltage translators in 1.8 V microcontroller systems
User-selectable memory organization	Hardware-configurable 256 × 8 or 128 × 16 layout - optimizes byte vs. word access efficiency per host processor architecture
Self-timed write cycle	No external timing control needed; max 10 ms duration - simplifies firmware design and reduces CPU overhead
Sequential read mode	Continuous data stream without dummy bits between addresses - improves read throughput for block configuration loads
Automotive-grade qualification	Rated for −40°C to +85°C with lead-free/halogen-free construction - meets AEC-Q100 stress test requirements for industrial reliability
READY/BUSY status reporting	DO pin indicates programming progress when CS is pulsed high post-write - enables non-blocking polling in real-time systems

Applications

Industrial PLC Configuration Storage	Automotive Body Control Module (BCM)
Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and firmware revision identifiers in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent state retention across power cycles and brownout events. Use Value: Enables field-upgradable parameter sets without requiring battery-backed SRAM; 100-year retention ensures data integrity over equipment lifetime.	Use Scenario: Holding door lock actuator profiles, mirror position presets, and lighting dimming curves in vehicle body control units operating in under-dash locations. IC Role / Device Role / Timing Role: Serial configuration memory interfaced directly to 1.8 V CAN microcontrollers for secure, low-power parameter storage. Use Value: 1.8 V compatibility eliminates level-shifting components; −40°C to +85°C rating ensures operation across full automotive ambient range.
Medical Diagnostic Equipment Calibration	Smart Energy Meter Firmware Parameters
Use Scenario: Archiving factory-calibrated ADC gain/offset coefficients and transducer linearization tables in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: Trusted nonvolatile memory storing safety-critical calibration constants accessed at boot time prior to analog signal processing. Use Value: 1 million write cycles support recalibration during service intervals; 100-year retention satisfies ISO 13485 long-term traceability requirements.	Use Scenario: Maintaining tariff schedules, metering constants, and communication protocol keys in ANSI C12.22-compliant smart electricity meters installed in outdoor utility enclosures. IC Role / Device Role / Timing Role: Tamper-resistant serial EEPROM storing cryptographic keys and billing parameters with write-protection via EWDS instruction. Use Value: Self-timed writes prevent corruption during voltage sags; industrial temp rating ensures reliability in uncontrolled outdoor thermal environments.

Industrial PLC Configuration Storage

Automotive Body Control Module (BCM)

Use Scenario: Storing calibrated sensor offsets, I/O mapping tables, and firmware revision identifiers in programmable logic controllers deployed in factory automation environments.

IC Role / Device Role / Timing Role: Nonvolatile configuration register providing persistent state retention across power cycles and brownout events.

Use Value: Enables field-upgradable parameter sets without requiring battery-backed SRAM; 100-year retention ensures data integrity over equipment lifetime.

Use Scenario: Holding door lock actuator profiles, mirror position presets, and lighting dimming curves in vehicle body control units operating in under-dash locations.

IC Role / Device Role / Timing Role: Serial configuration memory interfaced directly to 1.8 V CAN microcontrollers for secure, low-power parameter storage.

Use Value: 1.8 V compatibility eliminates level-shifting components; −40°C to +85°C rating ensures operation across full automotive ambient range.

Medical Diagnostic Equipment Calibration

Smart Energy Meter Firmware Parameters

Use Scenario: Archiving factory-calibrated ADC gain/offset coefficients and transducer linearization tables in portable ultrasound and ECG devices.

IC Role / Device Role / Timing Role: Trusted nonvolatile memory storing safety-critical calibration constants accessed at boot time prior to analog signal processing.

Use Value: 1 million write cycles support recalibration during service intervals; 100-year retention satisfies ISO 13485 long-term traceability requirements.

Use Scenario: Maintaining tariff schedules, metering constants, and communication protocol keys in ANSI C12.22-compliant smart electricity meters installed in outdoor utility enclosures.

IC Role / Device Role / Timing Role: Tamper-resistant serial EEPROM storing cryptographic keys and billing parameters with write-protection via EWDS instruction.

Use Value: Self-timed writes prevent corruption during voltage sags; industrial temp rating ensures reliability in uncontrolled outdoor thermal environments.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
M95256-DRMN6TP/K	256 Kbit SPI interface, 2.5–5.5 V supply, 5 MHz clock, no ORG pin - fixed 32K × 8 organization	Larger capacity but incompatible instruction set and pinout; requires SPI host driver redesign	Select when higher density and faster SPI throughput are needed, and host supports SPI protocol stack
BR24G02FJ-WE2	2 Kbit I²C interface, 1.7–5.5 V supply, 400 kHz standard mode, 1 MHz fast mode - no ORG pin or sequential read	Requires I²C bus arbitration and ACK/NACK handling; lacks hardware organization select and continuous read mode	Choose for systems already using I²C peripherals and where simpler two-wire interface outweighs loss of sequential read efficiency

Compared with M95256-DRMN6TP/K and BR24G02FJ-WE2, the AT93C56A-10SI-1.8 offers unique 3-wire simplicity with hardware-configurable memory mapping and true sequential read - reducing firmware complexity in resource-constrained 8-bit MCU designs while maintaining 1.8 V compatibility and industrial temperature resilience.

Availability

AT93C56A-10SI-1.8 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical diagnostic calibration storage, and smart energy meter firmware parameter retention requiring stable component supply and long-lifecycle assurance.

Supply support for AT93C56A-10SI-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, FPGAs, and memory solutions, with emphasis on embedded control and connectivity.

The AT93C56A-10SI-1.8 belongs to Microchip's legacy Atmel serial EEPROM product line, designed specifically for low-power, low-voltage embedded systems requiring reliable nonvolatile storage with minimal pin count and simple host interface logic.

FAQ

What is the memory organization flexibility of the AT93C56A-10SI-1.8?

The AT93C56A-10SI-1.8 supports user-selectable memory mapping: connecting the ORG pin to VCC configures it as 128 × 16 (16-bit words), while tying ORG to GND selects 256 × 8 (8-bit words). This hardware-based selection allows optimization for host processor data bus width without firmware changes. Note that ORG functionality is not available on 1.8 V-only variants per datasheet specification, and AT93C56A-10SI-1.8 complies with this restriction.

Does the AT93C56A-10SI-1.8 require an external erase cycle before writing?

No, the AT93C56A-10SI-1.8 does not require a separate erase cycle before write operations. Each WRITE instruction automatically erases and reprograms the target memory location in a single self-timed operation. The device enters Erase/Write Enable (EWEN) state only after explicit instruction, and remains enabled until EWDS is issued or power is cycled - ensuring data integrity against accidental writes. This behavior is intrinsic to AT93C56A-10SI-1.8's architecture.

What is the maximum clock frequency supported by the AT93C56A-10SI-1.8 at 1.8 V?

At 1.8 V supply, the AT93C56A-10SI-1.8 supports a maximum SK clock frequency of 0.25 MHz, as specified in the AC Characteristics table. This is lower than its 2 MHz rating at 5 V, reflecting reduced internal timing margins at minimum voltage. All timing parameters - including tSKH, tSKL, tCS, and tDIS - scale accordingly per the 1.8 V ≤ VCC ≤ 5.5 V column, and must be observed in host controller firmware for reliable communication with AT93C56A-10SI-1.8.

Can the AT93C56A-10SI-1.8 be used in automotive under-hood applications?

The AT93C56A-10SI-1.8 is rated for industrial temperature range (−40°C to +85°C) and qualified as automotive grade with lead-free/halogen-free construction, making it suitable for cabin and body-control applications. However, it is not rated for extended temperature (−40°C to +125°C) operation required in direct under-hood locations. For such environments, Microchip offers variants like AT93C56A-10SQ-2.7 (−40°C to +125°C), but AT93C56A-10SI-1.8 must be deployed within its specified thermal envelope to ensure reliability.

How does the AT93C56A-10SI-1.8 indicate readiness after a write operation?

The AT93C56A-10SI-1.8 uses its DO pin to report READY/BUSY status: after initiating a WRITE cycle, if CS is brought high for ≥250 ns (tCS), DO outputs logic '0' while programming continues and transitions to logic '1' upon completion. This polling mechanism is valid only when CS is pulsed high *during* the self-timed write window - not after tWP expires. This real-time feedback is a core feature of AT93C56A-10SI-1.8's interface protocol.

AT93C56A-10SI-1.8 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:: 1.8V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

AT93C56A-10SI-1.8 FAQ

1.How can I place an order for AT93C56A-10SI-1.8 through Aetrix?

Please submit a Request for Quotation (RFQ) for AT93C56A-10SI-1.8 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 AT93C56A-10SI-1.8 reliable?

The price and inventory of AT93C56A-10SI-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C56A-10SI-1.8 is usually 5 days.

3.What payment methods are accepted for AT93C56A-10SI-1.8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56A-10SI-1.8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AT93C56A-10SI-1.8?

AT93C56A-10SI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AT93C56A-10SI-1.8 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 AT93C56A-10SI-1.8?

For technical support, including AT93C56A-10SI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56A-10SI-1.8 requirements.

6.How does Aetrix verify that AT93C56A-10SI-1.8 is sourced from the original manufacturer or authorized distributors?

All AT93C56A-10SI-1.8 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 AT93C56A-10SI-1.8 meets industry standards.

7.What is the process for return or replacement of AT93C56A-10SI-1.8?

All AT93C56A-10SI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56A-10SI-1.8, 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 AT93C56A-10SI-1.8 part is unused and in its original packaging.

Return procedure for AT93C56A-10SI-1.8:

1.Submit a request within 90 days.

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

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