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Microchip Technology AT93C56W-10SI-2.5
- Part No.:
- AT93C56W-10SI-2.5
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C56W-10SI-2.5.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,762
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Product details
Overview
AT93C56W-10SI-2.5 from Microchip Technology (formerly Atmel) is a 2K-bit serial EEPROM with 3-wire interface, supporting 256 × 8 or 128 × 16 organization selectable via ORG pin, 2.5V–5.5V supply range, 10 ms max self-timed write cycle, and industrial temperature operation (−40°C to +85°C). It serves as nonvolatile configuration storage in microcontroller-based embedded systems requiring low-voltage reliability.
For engineers reviewing the AT93C56W-10SI-2.5 datasheet, AT93C56W-10SI-2.5 pinout, AT93C56W-10SI-2.5 application, or AT93C56W-10SI-2.5 equivalent, key selection criteria include voltage compatibility (2.5V min), industrial-grade temperature support, 3-wire serial timing constraints, ORG-pin configurable memory width, and endurance (1 million write cycles).
Technical Context
The AT93C56W-10SI-2.5 implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with start-bit–driven instruction decoding and READY/BUSY status reporting via DO during write/erase operations. Its internal architecture supports dual word-width organization (8-bit or 16-bit words) selected by the ORG pin state, enabling flexible data alignment without external logic.
It operates across VCC = 2.5V–5.5V with guaranteed AC timing at 2.5V (fSK ≤ 0.5 MHz), features self-timed erase/write cycles eliminating external timing control, and maintains data retention for 100 years. The device enters Erase/Write Disable (EWDS) state on power-up, requiring explicit EWEN instruction before programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16 words) |
| Supply Voltage Range | 2.5V to 5.5V - enables direct interfacing with 2.5V/3.3V logic without level shifters |
| Max Clock Frequency | 0.5 MHz at 2.5V - defines maximum serial transaction rate under low-voltage operation |
| Write Cycle Time | 10 ms max - determines minimum time between successive write commands |
| Endurance | 1 million write cycles - specifies guaranteed reprogrammability before wear-out |
| Data Retention | 100 years - ensures long-term configuration persistence without refresh |
| Operating Temperature | −40°C to +85°C - qualified for industrial ambient environments |
Pinout & Package
AT93C56W-10SI-2.5 is housed in an 8-lead EIAJ SOIC package (8S2), 0.200" wide, with standard pinout compatible with JEDEC SOIC footprints but rotated orientation per "W" suffix (as confirmed in ordering table and pin diagrams).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for serial communication; must be held low during instruction transfer and timing-critical operations |
| SK | Serial Clock | Synchronizes all data transfers; rising edge samples DI, falling edge outputs DO |
| DI | Data Input | Receives instruction opcodes, addresses, and write data; latched on SK rising edge |
| DO | Data Output | Outputs read data and READY/BUSY status; high-impedance when CS is high |
| GND | Ground Reference | Primary return path for VCC and signal currents; requires low-impedance PCB connection |
| VCC | Power Supply | 2.5V–5.5V input; decoupling capacitor (0.1 µF) required near pin for noise immunity |
| ORG | Organization Select | High = 128 × 16 mode; low = 256 × 8 mode; unconnected defaults to x16 via internal pull-up |
| DC | Don't Connect | No internal connection; must remain floating or tied to GND/VCC only if required by layout constraints |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Configurable 256 × 8 or 128 × 16 word width via ORG pin, enabling optimal byte- or word-aligned access |
| Low-voltage operation down to 2.5V | Guaranteed functionality and AC timing at 2.5V minimizes system power supply complexity |
| Self-timed write/erase cycles | Eliminates need for external write timing control or polling delay estimation in firmware |
| READY/BUSY status reporting | DO pin returns logic '0' during active write/erase, enabling precise host synchronization without fixed delays |
| Industrial temperature qualification | Validated operation from −40°C to +85°C supports deployment in harsh environmental conditions |
Applications
| Motor Control Configuration Storage | Industrial Sensor Calibration Data |
|---|---|
Use Scenario: Storing motor profile parameters, PID coefficients, and fault thresholds in brushless DC motor drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime recalibration. Use Value: Enables field-upgradable tuning without hardware changes; 1M endurance supports frequent calibration updates. |
Use Scenario: Retaining factory-calibrated offset/gain values and linearization tables for analog sensor front-ends. IC Role / Device Role / Timing Role: Persistent parameter store read at power-on reset and updated during maintenance cycles. Use Value: Maintains measurement accuracy over product lifetime; 100-year retention avoids periodic recalibration. |
| Embedded System Bootloader Settings | Smart Meter Firmware Metadata |
Use Scenario: Holding bootloader jump address, secure boot flags, and firmware version identifiers in resource-constrained MCUs. IC Role / Device Role / Timing Role: Read-only configuration source during early boot sequence prior to main application execution. Use Value: Isolates critical boot logic from main flash, improving update safety and reducing MCU flash wear. |
Use Scenario: Storing metering algorithm revision, tariff schedule timestamps, and tamper-event logs in utility meters. IC Role / Device Role / Timing Role: Secure, infrequently written metadata repository synchronized with energy accumulation events. Use Value: Survives repeated power cycling and battery backup gaps; ESD >4000V protects against field handling surges. |
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, 2.5V–5.5V, 20 MHz clock, no ORG pin - fixed 32K × 8 organization | Higher density and faster interface, but lacks user-selectable word width and uses SPI instead of 3-wire | Choose for higher throughput and larger storage; avoid if ORG-driven flexibility or legacy 3-wire protocol is required |
| STK12C68-5BI | 8K-bit NVSRAM with parallel interface, 4.5V–5.5V only, built-in lithium backup, no low-voltage operation | Byte-level random access and nanosecond read latency vs. serial sequential access | Choose for ultra-fast read/write in power-fail scenarios; avoid for low-voltage or space-constrained designs |
Compared with M95256-WMN6TP and STK12C68-5BI, AT93C56W-10SI-2.5 uniquely balances low-voltage operation, configurable memory width, and minimal pin count - making it optimal for cost-sensitive, space-constrained industrial controllers where 2K-bit capacity suffices.
Availability
AT93C56W-10SI-2.5 is available at Aetrix Electronics and suitable for industrial motor control, sensor calibration, embedded bootloader configuration, and smart metering applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AT93C56W-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 acquired Atmel in 2016 and continues to manufacture, qualify, and support the AT93C family of serial EEPROMs with full backward compatibility and long-term product assurance.
The AT93C56W-10SI-2.5 belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-power, low-pin-count nonvolatile storage in industrial and automotive-qualified embedded systems.
FAQ
What is the function of the ORG pin on the AT93C56W-10SI-2.5?
The ORG pin on the AT93C56W-10SI-2.5 selects internal memory organization: tied to VCC enables 128 × 16 mode (16-bit words), tied to GND enables 256 × 8 mode (8-bit words), and left unconnected defaults to x16 via an internal ~1 MΩ pull-up. This pin directly controls address width and data bus alignment without firmware overhead, and its behavior is fully specified for the AT93C56W-10SI-2.5 across its 2.5V–5.5V operating range.
Does the AT93C56W-10SI-2.5 support 1.8V operation?
No, the AT93C56W-10SI-2.5 does not support 1.8V operation. Its ordering code suffix "-2.5" explicitly denotes a 2.5V–5.5V supply range, and the device datasheet confirms that AT93C56 variants are available only in 4.5–5.5V, 2.7–5.5V, and 2.5–5.5V versions - excluding 1.8V. For 1.8V compatibility, engineers must select AT93C46-10xx-1.8 variants instead.
How is the AT93C56W-10SI-2.5 write protection implemented?
Write protection on the AT93C56W-10SI-2.5 is enforced through an Erase/Write Enable (EWEN) instruction: the device powers up in Erase/Write Disable (EWDS) state, and all programming instructions (WRITE, ERASE, WRAL, ERAL) are ignored until EWEN is successfully executed. Once enabled, programming remains active until EWDS is issued or power is cycled - providing deterministic, software-controlled security against accidental writes.
What does the "W" in AT93C56W-10SI-2.5 indicate?
The "W" in AT93C56W-10SI-2.5 denotes a rotated pinout variant of the 8-lead EIAJ SOIC (8S2) package, where pin 1 is located at the bottom-left corner instead of top-left - matching the "Rotated (R)" configuration shown in the datasheet's SOIC diagram. This variant maintains identical electrical characteristics and functionality but requires corresponding PCB footprint adjustment versus standard SOIC layouts.
Can the AT93C56W-10SI-2.5 be used in automotive applications?
The AT93C56W-10SI-2.5 is rated for industrial temperature (−40°C to +85°C) and is not AEC-Q100 qualified. While its operating range overlaps with some automotive cabin applications, Microchip's official documentation states that "Automotive Grade and Extended Temperature Devices Available" applies only to specific part numbers (e.g., AT93C56-10XMI variants), not the AT93C56W-10SI-2.5. For automotive use, engineers must verify qualification status with Microchip's current automotive product matrix.
AT93C56W-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
AT93C56W-10SI-2.5 FAQ
1.How can I place an order for AT93C56W-10SI-2.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56W-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 AT93C56W-10SI-2.5 reliable?
The price and inventory of AT93C56W-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 AT93C56W-10SI-2.5 is usually 5 days.
3.What payment methods are accepted for AT93C56W-10SI-2.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56W-10SI-2.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56W-10SI-2.5?
AT93C56W-10SI-2.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56W-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 AT93C56W-10SI-2.5?
For technical support, including AT93C56W-10SI-2.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56W-10SI-2.5 requirements.
6.How does Aetrix verify that AT93C56W-10SI-2.5 is sourced from the original manufacturer or authorized distributors?
All AT93C56W-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 AT93C56W-10SI-2.5 meets industry standards.
7.What is the process for return or replacement of AT93C56W-10SI-2.5?
All AT93C56W-10SI-2.5 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56W-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 AT93C56W-10SI-2.5 part is unused and in its original packaging.
Return procedure for AT93C56W-10SI-2.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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