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Microchip Technology AT93C56A-10SU-2.7
- Part No.:
- AT93C56A-10SU-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C56A-10SU-2.7.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,162
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Product details
Overview
AT93C56A-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, operating from 2.7V to 5.5V, featuring 2 MHz clock rate at 5V, 1 million write cycles endurance, and 100-year data retention. It serves as nonvolatile configuration storage in industrial control modules, embedded sensor nodes, and power management ICs.
For engineers reviewing the AT93C56A-10SU-2.7 datasheet, AT93C56A-10SU-2.7 pinout, AT93C56A-10SU-2.7 application, or AT93C56A-10SU-2.7 equivalent, key selection considerations include voltage range compatibility (2.7–5.5 V), ORG-pin configurable memory width, self-timed 10 ms max write cycle, standby current of 6.0 µA at 2.7 V, and JEDEC SOIC-8 packaging with RoHS-compliant green finish.
Technical Context
The AT93C56A-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–driven opcodes and supports sequential read with automatic address incrementing.
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 firmware parameter or calibration storage without external address latches |
| Supply Voltage Range | 2.7 V to 5.5 V - supports direct interfacing with 3.3 V and 5 V microcontrollers without level-shifting |
| Max Clock Frequency | 2 MHz at VCC = 5 V - delivers up to 250 kbit/s serial throughput for rapid configuration loading |
| Write Cycle Time | ≤10 ms - deterministic self-timed programming allows precise host timing budgeting without polling overhead |
| Endurance & Retention | 1 million write cycles / 100 years data retention - suitable for field-updatable systems requiring long-term reliability |
| Standby Current | 6.0 µA at 2.7 V - minimizes quiescent power in battery-backed or energy-harvesting applications |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial-grade operation in motor drives, PLCs, and outdoor equipment |
Pinout & Package
AT93C56A-10SU-2.7 is packaged in an 8-lead JEDEC SOIC (8S1), 0.150" wide body, RoHS-compliant green plastic gull-wing package with NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: must be held low for entire instruction sequence; high state places DO in high-impedance or outputs Ready/Busy |
| SK | Serial Clock | Synchronous edge-triggered input: rising edge clocks DI data in and DO data out; frequency ≤2 MHz at 5 V |
| DI | Data Input | Serial command/address/data input path; accepts Start Bit (1), Op Code, address, and write data per instruction |
| DO | Data Output | Open-drain output: drives data during READ, reports Ready (1) or Busy (0) during write/erase when CS is high post-initiation |
| GND | Ground Reference | Primary return path for VCC and I/O; requires low-impedance connection to minimize noise coupling into serial interface |
| VCC | Power Supply | Single supply input: powers core logic and I/O buffers; bypass capacitor (0.1 µF) required near pin for stable operation |
| ORG | Organization Select | Logic-level controlled memory width: VCC = x16 (128 words), GND = x8 (256 words); unconnected defaults to x16 |
| NC | No Connect | Internally unused terminal; must remain floating - no external connection or PCB trace required |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 256 × 8 or 128 × 16 layout via ORG pin - eliminates need for software bit-packing or external multiplexing |
| Three-wire serial interface | Minimal GPIO footprint (3 pins) with no chip-enable arbitration or bidirectional bus contention - simplifies MCU integration |
| Self-timed write cycle | No external timing control or erase-before-write required - reduces firmware complexity and eliminates risk of partial writes |
| Ready/Busy status reporting | DO pin signals completion or progress during write/erase when CS is pulsed high - enables efficient polling without fixed delays |
| Low-voltage operation | Functional down to 2.7 V with guaranteed 6.0 µA standby current - supports brown-out tolerant designs in 3.3 V systems |
| Industrial temperature grade | Rated −40 °C to +85 °C - validated for use in programmable logic controllers, HVAC controllers, and industrial gateways |
Applications
| Industrial Sensor Calibration | Embedded Power Management |
|---|---|
|
Use Scenario: Storing factory-trimmed offset/gain coefficients and temperature compensation tables for analog sensor front-ends in smart transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding calibration constants accessed at power-on reset before ADC initialization. Use Value: Enables single-pass calibration during manufacturing and field recalibration without firmware update; 100-year retention ensures accuracy over product lifetime. |
Use Scenario: Holding dynamic voltage/frequency scaling (DVFS) profiles and fault log history in DC-DC controller modules for telecom base stations. IC Role / Device Role / Timing Role: Serial configuration store accessed by PMIC's internal state machine during boot and runtime reconfiguration. Use Value: Supports adaptive power optimization across thermal zones; 1M endurance allows daily profile updates over 27 years. |
| Motor Drive Parameter Storage | IoT Edge Device Identity |
|
Use Scenario: Saving user-adjusted PID loop gains, acceleration ramps, and safety torque limits in variable-frequency drives. IC Role / Device Role / Timing Role: Persistent parameter bank loaded at startup to restore operational settings after power loss. Use Value: Eliminates manual reconfiguration after maintenance; ORG-pin flexibility allows same PCB to support 8-bit or 16-bit tuning resolution. |
Use Scenario: Securing device-specific cryptographic keys, MAC addresses, and firmware version stamps in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Trusted identity vault accessed only by secure bootloader during authenticated boot sequence. Use Value: Prevents cloning via hardware-bound credentials; low 2.7 V operation extends battery life in coin-cell powered deployments. |
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 operation | Requires additional CS and SCK lines; higher density suits larger configuration sets | Select when migrating to SPI-based platforms or needing >2 Kbit storage without redesigning communication stack |
| AT25020B-SSHL-T | 2 Kbit SPI EEPROM, 20 MHz clock, 1.8–5.5 V, 5 ms max write time, SOIC-8 | Faster write and clock speed; lacks ORG-pin organization select | Choose for latency-sensitive applications where fixed 256 × 8 layout suffices and higher throughput justifies SPI overhead |
Compared with M95256-WMN6TP and AT25020B-SSHL-T, the AT93C56A-10SU-2.7 offers unique ORG-pin configurability and three-wire simplicity but trades off clock speed and voltage flexibility - optimal for cost- and pin-constrained industrial designs prioritizing interface minimalism over raw bandwidth.
Availability
AT93C56A-10SU-2.7 is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded power management, motor drive parameter storage, and IoT edge device identity applications requiring stable component supply and long-term obsolescence planning.
Supply support for AT93C56A-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, delivering high-reliability nonvolatile memory solutions for industrial and automotive markets.
The AT93C56A-10SU-2.7 belongs to the AT93CxxA family of low-voltage three-wire EEPROMs designed specifically for space-constrained embedded systems requiring robust, pin-efficient configuration storage with extended data retention.
FAQ
What is the function of the ORG pin on the AT93C56A-10SU-2.7?
The ORG pin on the AT93C56A-10SU-2.7 selects internal 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 software bit manipulation and supports flexible data alignment in the AT93C56A-10SU-2.7's 2 Kbit array.
Does the AT93C56A-10SU-2.7 require an external erase cycle before writing?
No, the AT93C56A-10SU-2.7 does not require a separate erase cycle before writing. Each WRITE instruction performs both erase and program operations automatically within its self-timed 10 ms max cycle. The device enters Erase/Write Enable (EWEN) state only after explicit EWEN command execution, ensuring data integrity against accidental writes.
What package type is used for the AT93C56A-10SU-2.7?
The AT93C56A-10SU-2.7 uses an 8-lead JEDEC SOIC (8S1) package - 0.150" wide body, gull-wing leads, RoHS-compliant green plastic housing with NiPdAu lead finish. This standard surface-mount package ensures compatibility with automated assembly processes and provides mechanical robustness for industrial PCB environments.
How does the AT93C56A-10SU-2.7 indicate write completion?
The AT93C56A-10SU-2.7 indicates write completion via Ready/Busy status on the DO pin: when CS is brought high after initiating a write, DO outputs logic '1' if complete or logic '0' if still busy. This status is valid only if CS is asserted ≥250 ns after SK edge; it cannot be read after the self-timed tWP cycle ends.
Is the AT93C56A-10SU-2.7 suitable for automotive applications?
No - the AT93C56A-10SU-2.7 is specified for industrial temperature range (−40 °C to +85 °C) and is not qualified to AEC-Q100 automotive standards. While functional in benign automotive subsystems, Microchip documentation explicitly states "Atmel's products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life," excluding safety-critical vehicle systems.
AT93C56A-10SU-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:
- 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
AT93C56A-10SU-2.7 FAQ
1.How can I place an order for AT93C56A-10SU-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56A-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 AT93C56A-10SU-2.7 reliable?
The price and inventory of AT93C56A-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 AT93C56A-10SU-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C56A-10SU-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56A-10SU-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56A-10SU-2.7?
AT93C56A-10SU-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56A-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 AT93C56A-10SU-2.7?
For technical support, including AT93C56A-10SU-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56A-10SU-2.7 requirements.
6.How does Aetrix verify that AT93C56A-10SU-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C56A-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 AT93C56A-10SU-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C56A-10SU-2.7?
All AT93C56A-10SU-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56A-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 AT93C56A-10SU-2.7 part is unused and in its original packaging.
Return procedure for AT93C56A-10SU-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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