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Microchip Technology AT93C56AW-10SU-2.7
- Part No.:
- AT93C56AW-10SU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AT93C56AW-10SU-2.7.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,834
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Product details
Overview
AT93C56AW-10SU-2.7 from Microchip Technology (formerly Atmel) is a 2 Kbit three-wire serial EEPROM with user-selectable 256 × 8 or 128 × 16 organization, low-voltage operation (2.7V to 5.5V), 2 MHz clock rate at 5V, and 1 million write cycles endurance. It serves as nonvolatile configuration storage in industrial control modules, sensor calibration systems, and power management ICs.
For engineers reviewing the AT93C56AW-10SU-2.7 datasheet, AT93C56AW-10SU-2.7 pinout, AT93C56AW-10SU-2.7 application, or AT93C56AW-10SU-2.7 equivalent, key selection criteria include VCC range compatibility (2.7–5.5 V), ORG-pin configurable memory width, self-timed 10 ms max write cycle, and 8-lead SOIC package footprint with RoHS-compliant green finish.
Technical Context
The AT93C56AW-10SU-2.7 implements a synchronous three-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, and EWDS. Its internal logic decodes start bit + opcode + address on rising CS edge and supports sequential read with automatic address increment.
Memory organization is dynamically selected via the ORG pin: tied to VCC enables 128 × 16 mode; grounded enables 256 × 8 mode; unconnected defaults to x16 via internal 1 MΩ pull-up. Write operations require prior EWEN execution and are self-timed with Ready/Busy status reported on DO when CS is reasserted during tWP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16), enabling compact configuration storage without external address decoding logic |
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct interfacing with 3.3 V and 5 V microcontrollers without level shifters |
| Max Clock Frequency | 2 MHz at VCC = 5 V - allows high-speed parameter loading during system boot or calibration sequences |
| Write Cycle Time | ≤10 ms - defines minimum interval between successive writes; impacts firmware update latency in field-programmable devices |
| Endurance | 1 million write cycles - ensures reliable operation over 10+ years in daily-configurable industrial sensors |
| Data Retention | 100 years at 25 °C - guarantees long-term integrity of calibration coefficients and device identity data |
| Operating Temperature | −40 °C to +85 °C - qualified for use in automotive body control modules and outdoor metering equipment |
Pinout & Package
AT93C56AW-10SU-2.7 uses an 8-lead EIAJ SOIC (package code 8S2), 0.200" wide body, RoHS-compliant green finish. Pin 1 is marked by notch or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: must be held low for entire instruction sequence; controls DO high-impedance state and Ready/Busy reporting |
| SK | Serial Clock | Synchronous edge-triggered input: rising edge latches DI; falling edge clocks DO; timing constraints require tSKH/tSKL ≥250 ns (1.8 V) |
| DI | Data Input | Serial instruction/data input: accepts Start Bit (1), Op Code (2 bits), Address (9 or 8 bits), and Data (8 or 16 bits) |
| DO | Data Output | Open-drain output: drives logic levels only during READ; reports Ready/Busy status when CS is reasserted mid-write |
| GND | Ground Reference | Primary return path for VCC current and signal references; requires low-impedance PCB connection to minimize noise coupling |
| VCC | Power Supply | Single-supply input: powers internal logic and memory array; bypass capacitor (0.1 µF) required within 10 mm of pin |
| ORG | Organization Select | Hardware-configured memory width: VCC = x16 (128 words); GND = x8 (256 words); unconnected = x16 default |
| NC | No Connect | Internally unused terminal: must remain floating; no PCB trace or solder mask opening required |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 256 × 8 or 128 × 16 layout eliminates need for software address remapping across product variants |
| Self-timed write cycle | Automatic internal timing (≤10 ms) removes requirement for external write-complete polling or timeout logic in host firmware |
| Three-wire serial interface | Minimal GPIO usage (3 pins) reduces MCU pin count and PCB routing complexity versus SPI or I²C EEPROMs |
| Erase/Write Enable security | EWEN/EWDS instructions prevent accidental overwrites - critical for preserving factory calibration data in production test systems |
| Low standby current | 0.4 µA at 1.8 V enables battery-backed operation in energy-harvesting sensor nodes with multi-year shelf life |
Applications
| Industrial Sensor Calibration | Printer Cartridge Authentication |
|---|---|
|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding factory-trimmed parameters accessed during power-on initialization. Use Value: Enables single-board calibration across 100+ sensor units without firmware modification or external programming fixtures. |
Use Scenario: Authenticating OEM ink cartridges in laser printers using stored cryptographic keys and usage counters. IC Role / Device Role / Timing Role: Secure parameter store with write-protection (EWDS) preventing tampering of cartridge lifetime metrics. Use Value: Supports anti-counterfeiting logic while maintaining <10 µs read latency during cartridge insertion detection. |
| Power Supply Configuration | Motor Drive Fault Logging |
|
Use Scenario: Holding digital potentiometer settings and protection thresholds in programmable DC-DC converters. IC Role / Device Role / Timing Role: Persistent configuration memory updated only during service-mode programming via UART-to-SPI bridge. Use Value: Eliminates manual trim-pot adjustments and enables remote firmware updates of operating parameters. |
Use Scenario: Recording overcurrent event timestamps and fault codes in BLDC motor controllers for predictive maintenance. IC Role / Device Role / Timing Role: Circular buffer implemented in EEPROM with wear-leveling handled by host MCU during write cycles. Use Value: Survives 10,000+ fault records with guaranteed 1M-cycle endurance, supporting 5-year field deployment. |
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 | 4 Kbit capacity, SPI interface (4-wire), 5 MHz max clock, 1.8–5.5 V supply | Requires additional chip select line and different command protocol; higher density suits larger configuration sets | Select when migrating to SPI-based platforms or requiring >2 Kbit storage without changing board layout |
| BR24G256FJ-WE2 | I²C interface (2-wire), 256 Kbit capacity, 1 MHz max clock, 1.6–5.5 V supply | Uses standard I²C addressing (0x50–0x57); higher density but slower write speed (5 ms typical) | Choose for systems already using I²C peripherals to minimize MCU driver development effort |
Compared with M95256-WMN6TP and BR24G256FJ-WE2, the AT93C56AW-10SU-2.7 offers lowest pin count (3-wire), deterministic 10 ms write time, and hardware-configurable organization - making it optimal for cost-sensitive, space-constrained designs where instruction-set simplicity and voltage flexibility are prioritized over raw density.
Availability
AT93C56AW-10SU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, printer cartridge authentication, and power supply configuration requiring stable component supply across extended product lifecycles.
Supply support for AT93C56AW-10SU-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 support for legacy Atmel serial EEPROMs, providing long-term documentation, cross-reference tools, and obsolescence mitigation programs.
The AT93C56A series was designed for low-power, low-voltage embedded systems requiring robust nonvolatile storage in space-constrained industrial and commercial applications - emphasizing pin efficiency, voltage flexibility, and data retention reliability.
FAQ
What is the function of the ORG pin on the AT93C56AW-10SU-2.7?
The ORG pin on the AT93C56AW-10SU-2.7 selects memory organization: tied to VCC configures 128 × 16 mode; grounded configures 256 × 8 mode; left unconnected defaults to x16 via internal 1 MΩ pull-up. This hardware-selectable width eliminates firmware address mapping complexity and supports dual-product reuse of the same AT93C56AW-10SU-2.7 in both byte- and word-oriented systems.
Does the AT93C56AW-10SU-2.7 support sequential read operations?
Yes, the AT93C56AW-10SU-2.7 supports sequential read: after initiating a READ instruction, holding CS low causes automatic address increment and continuous data output on DO without dummy bits between words. This enables efficient bulk parameter retrieval - for example, reading all 256 calibration coefficients in a single CS assertion - reducing host MCU overhead compared to random-access reads.
How does write protection work on the AT93C56AW-10SU-2.7?
Write protection on the AT93C56AW-10SU-2.7 is enforced via EWEN (Erase/Write Enable) and EWDS (Erase/Write Disable) instructions. The device powers up in EWDS state, blocking all programming. An EWEN instruction must precede any ERASE or WRITE command. Executing EWDS afterward restores protection. This two-step mechanism prevents accidental overwrites of critical data like calibration constants or device IDs in the AT93C56AW-10SU-2.7.
What package type does the AT93C56AW-10SU-2.7 use?
The AT93C56AW-10SU-2.7 uses an 8-lead EIAJ SOIC package (package code 8S2), 0.200" wide body, with RoHS-compliant green finish. Its 5.13–5.35 mm width, 7.70–8.26 mm length, and 1.70–2.16 mm height are compatible with standard SOIC-8 footprints and reflow profiles, enabling drop-in replacement for other 8-lead serial EEPROMs in existing industrial PCB layouts.
Is the AT93C56AW-10SU-2.7 suitable for automotive applications?
No - the AT93C56AW-10SU-2.7 is specified for industrial temperature range (−40 °C to +85 °C) and is not qualified to AEC-Q100 standards. While its operating range overlaps with some automotive cabin applications, Microchip's official documentation states "Atmel's products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life," and automotive-grade variants (e.g., AT93C56A-MAU) are separately designated. Use AT93C56AW-10SU-2.7 only in non-safety-critical industrial or commercial systems.
AT93C56AW-10SU-2.7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C56AW-10SU-2.7 FAQ
1.How can I place an order for AT93C56AW-10SU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56AW-10SU-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 AT93C56AW-10SU-2.7 reliable?
The price and inventory of AT93C56AW-10SU-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 AT93C56AW-10SU-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C56AW-10SU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56AW-10SU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56AW-10SU-2.7?
AT93C56AW-10SU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56AW-10SU-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 AT93C56AW-10SU-2.7?
For technical support, including AT93C56AW-10SU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56AW-10SU-2.7 requirements.
6.How does Aetrix verify that AT93C56AW-10SU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C56AW-10SU-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 AT93C56AW-10SU-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C56AW-10SU-2.7?
All AT93C56AW-10SU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56AW-10SU-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 AT93C56AW-10SU-2.7 part is unused and in its original packaging.
Return procedure for AT93C56AW-10SU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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