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Microchip Technology AT93C56A-10SU-1.8
- Part No.:
- AT93C56A-10SU-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C56A-10SU-1.8.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,292
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Product details
Overview
AT93C56A-10SU-1.8 from Microchip Technology (formerly Atmel) is a 2 Kbit serial EEPROM with three-wire interface, supporting 1.8V to 5.5V supply and user-selectable 256 × 8 or 128 × 16 organization via ORG pin. It delivers 2 MHz clock rate at 5V, 10 ms max self-timed write cycle, and 1 million write endurance for embedded configuration storage in industrial controllers and power management systems.
For engineers reviewing the AT93C56A-10SU-1.8 datasheet, AT93C56A-10SU-1.8 pinout, AT93C56A-10SU-1.8 application, or AT93C56A-10SU-1.8 equivalent, key selection criteria include low-voltage operation down to 1.8V, dual memory organization flexibility, sequential read capability, and RoHS-compliant 8-lead SOIC (8S1) packaging with industrial temperature range (−40°C to +85°C).
Technical Context
The AT93C56A-10SU-1.8 implements a synchronous three-wire serial interface (CS/SK/DI/DO) with start-bit–driven instruction decoding and supports READ, WRITE, ERASE, EWEN, EWDS, ERAL, and WRAL commands. Its internal organization is dynamically selected by the ORG pin state-logic high enables 128 × 16 mode, ground enables 256 × 8 mode-and unconnected ORG defaults to x16 via internal 1 MΩ pull-up.
Write operations are self-timed with Ready/Busy status reported on DO when CS is reasserted after tCS ≥ 250 ns; no external erase cycle is required. The device features 100-year data retention and operates across VCC = 1.8V–5.5V with standby current as low as 0.4 µA at 1.8V, making it suitable for battery-backed and energy-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16), enabling compact nonvolatile storage for calibration data or device IDs |
| Supply Voltage Range | 1.8V to 5.5V - supports direct interfacing with 1.8V logic and legacy 3.3V/5V systems without level shifting |
| Max Clock Frequency | 2 MHz at VCC = 5V - enables fast configuration reads during system boot or runtime parameter updates |
| Write Cycle Time | ≤10 ms - deterministic programming latency critical for firmware update sequences and field service operations |
| Endurance | 1 million write cycles - ensures long-term reliability in applications requiring frequent parameter logging or tuning |
| Data Retention | 100 years - guarantees persistent storage integrity over full product lifecycle without refresh |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including motor drives and HVAC control units |
Pinout & Package
AT93C56A-10SU-1.8 is packaged in an 8-lead JEDEC SOIC (8S1), 0.150" wide body, RoHS-compliant and green-marked ("U"). Dimensions: 4.80–5.00 mm × 5.79–6.20 mm × 1.35–1.75 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be held low for entire instruction sequence and minimum tCS (250 ns) before SK edge to initiate valid operation |
| SK | Serial Clock | Synchronous timing reference for DI sampling and DO output; supports up to 2 MHz at 5V with defined tSKH/tSKL minima |
| DI | Data Input | Serial command/data input path; accepts Start Bit + Op Code + Address + Data with setup/hold timing referenced to SK |
| DO | Data Output | Tri-state serial output; returns Read data or Ready/Busy status (logic "1" = ready, "0" = busy) when CS is reasserted post-write |
| GND | Ground Reference | Primary return path for VCC and I/O signals; requires low-impedance connection to minimize noise coupling into serial interface |
| VCC | Power Supply | Single-supply input supporting 1.8V–5.5V; decoupling capacitor (0.1 µF) recommended near pin for stable read/write margins |
| ORG | Organization Select | Hardware-configurable memory layout: tied to VCC → 128 × 16 mode; tied to GND → 256 × 8 mode; floating → defaults to x16 |
| NC | No Connect | Internally unused terminal; must remain unconnected per design - no external bias or routing permitted |
Key Features
| Feature | Design Value |
|---|---|
| Three-wire serial interface | Reduces PCB routing complexity and MCU GPIO usage versus SPI/I²C; compatible with minimal microcontroller firmware overhead |
| User-selectable memory organization | Enables optimal byte- or word-aligned access without software remapping - simplifies host driver development for diverse host architectures |
| Sequential read operation | Eliminates repeated address transmission during block reads, cutting bus traffic by >40% for multi-byte configuration loads |
| Self-timed write cycle | Removes need for external write-complete polling delay or interrupt handling - streamlines host firmware and improves determinism |
| 1.8V low-voltage operation | Direct integration with ultra-low-power MCUs and battery-powered sensors without voltage translation circuitry |
| Industrial temperature rating | Validated operation across −40°C to +85°C ensures robustness in factory automation, outdoor metering, and automotive under-hood modules |
Applications
| Industrial PLC Configuration Storage | Smart Sensor Calibration Data Retention |
|---|---|
|
Use Scenario: Storing I/O mapping tables, scaling coefficients, and alarm thresholds in programmable logic controllers deployed in manufacturing lines. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent settings that survive power loss and reset cycles. Use Value: Enables plug-and-play module replacement without manual reconfiguration; 1M endurance supports decades of field recalibration events. |
Use Scenario: Retaining factory-trimmed offset/gain values and temperature compensation curves in MEMS pressure or humidity sensors. IC Role / Device Role / Timing Role: Precision calibration data vault accessed once at startup and rarely rewritten during lifetime. Use Value: Eliminates need for external trimming components; 100-year retention guarantees accuracy stability across sensor's operational life. |
| Power Supply Unit (PSU) Parameter Backup | Embedded Display Module Font/Icon Storage |
|
Use Scenario: Saving user-adjusted voltage/current limits, fan speed profiles, and fault log history in AC/DC and DC/DC power supplies. IC Role / Device Role / Timing Role: Critical runtime parameter backup memory with guaranteed write completion signaling via DO Ready/Busy. Use Value: Prevents configuration loss during brown-out events; ≤10 ms write time allows safe save-on-exit during graceful shutdown. |
Use Scenario: Hosting bitmap fonts, UI icons, and language strings in medical display panels and HMI touchscreens. IC Role / Device Role / Timing Role: Read-mostly serial code/data repository accessed during GUI initialization and dynamic theme switching. Use Value: Reduces main MCU Flash footprint; 2 MHz read speed enables sub-100 ms display boot with full localized UI assets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT93C56B-10SU-1.8 | Successor part with enhanced ESD rating (4 kV HBM), improved tSKH/tSKL specs, and updated qualification per AEC-Q100 Grade 2 (optional) | Preferred for new designs targeting automotive or high-noise industrial environments where robustness is prioritized over legacy compatibility | Select AT93C56B-10SU-1.8 if board-level ESD immunity >2 kV and extended qualification are required; pinout and instruction set are identical |
| M95256-DWMN6TP | 256 Kbit SPI EEPROM (32K × 8), 5 MHz max clock, 5 ms write cycle, VCC = 1.8V–5.5V, same SOIC-8 package | Higher density and faster interface suit applications needing larger configuration space or higher throughput, but requires SPI driver instead of custom 3-wire | Choose M95256-DWMN6TP only when migrating to SPI infrastructure or requiring >2 Kbit capacity; not drop-in due to protocol and pin function differences |
Compared with AT93C56A-10SU-1.8, AT93C56B-10SU-1.8 offers verified reliability upgrades without layout changes, while M95256-DWMN6TP trades protocol simplicity for density and speed - selection hinges on whether system architecture favors minimal GPIO use (3-wire) or standardized peripheral interfaces (SPI).
Availability
AT93C56A-10SU-1.8 is available at Aetrix Electronics and suitable for industrial PLCs, smart sensors, power supply units, and embedded display modules requiring stable component supply and long-term obsolescence management.
Supply support for AT93C56A-10SU-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 acquired Atmel in 2016 and maintains its serial EEPROM portfolio with focus on industrial-grade nonvolatile memory solutions.
The AT93C56A series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems requiring reliable, low-voltage configuration storage with minimal MCU resource usage.
FAQ
What is the memory organization of AT93C56A-10SU-1.8, and how is it selected?
The AT93C56A-10SU-1.8 supports two internal organizations: 256 × 8 (256 words × 8 bits) or 128 × 16 (128 words × 16 bits). Selection is controlled by the ORG pin: connect ORG to VCC for x16 mode, to GND for x8 mode. If left unconnected, the internal 1 MΩ pull-up defaults to x16 mode. This hardware-selectable layout eliminates software configuration overhead and ensures deterministic addressing behavior at power-up.
Does AT93C56A-10SU-1.8 require an external erase cycle before writing?
No, AT93C56A-10SU-1.8 does not require a separate erase cycle. Each WRITE instruction automatically erases the target location before programming, and the entire process is self-timed within the ≤10 ms maximum write cycle. The device enters Erase/Write Enable (EWEN) state only after explicit EWEN command execution, ensuring data integrity against accidental writes.
What is the meaning of "-10SU-1.8" in AT93C56A-10SU-1.8?
In AT93C56A-10SU-1.8, "-10" denotes 10 MHz equivalent timing grade (not clock speed), "SU" specifies 8-lead JEDEC SOIC (8S1) package, and "-1.8" indicates 1.8V–5.5V operating voltage range. The "U" suffix confirms RoHS-compliant, lead-free, green-packaged construction per manufacturer ordering conventions.
Can AT93C56A-10SU-1.8 operate reliably at 1.8V supply?
Yes, AT93C56A-10SU-1.8 is fully specified for operation from 1.8V to 5.5V. At 1.8V, it guarantees tSKH/tSKL ≥ 1000 ns, fSK ≥ 0.25 MHz, ISB1 ≤ 1.0 µA standby current, and valid VIH/VIL thresholds per Table 3-2. All AC/DC parameters in the datasheet explicitly cover the 1.8V–2.7V range, confirming robust functionality at minimum supply.
How is Ready/Busy status reported during write operations for AT93C56A-10SU-1.8?
During a write cycle, AT93C56A-10SU-1.8 outputs Ready/Busy status on the DO pin when CS is brought high after being held low for ≥250 ns (tCS). A logic "1" on DO indicates completion and readiness for next instruction; a logic "0" means programming is still active. This status is only valid if CS is reasserted before the end of tWP (10 ms max); no status is returned after tWP expires.
AT93C56A-10SU-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:
- 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-10SU-1.8 FAQ
1.How can I place an order for AT93C56A-10SU-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56A-10SU-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-10SU-1.8 reliable?
The price and inventory of AT93C56A-10SU-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-10SU-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C56A-10SU-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56A-10SU-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56A-10SU-1.8?
AT93C56A-10SU-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56A-10SU-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-10SU-1.8?
For technical support, including AT93C56A-10SU-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56A-10SU-1.8 requirements.
6.How does Aetrix verify that AT93C56A-10SU-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C56A-10SU-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-10SU-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C56A-10SU-1.8?
All AT93C56A-10SU-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56A-10SU-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-10SU-1.8 part is unused and in its original packaging.
Return procedure for AT93C56A-10SU-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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