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Microchip Technology AT93C56W-10SI
- Part No.:
- AT93C56W-10SI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C56W-10SI.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,375
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Product details
Overview
AT93C56W-10SI from Microchip Technology (formerly Atmel) is a 2K-bit serial EEPROM with 3-wire interface, user-selectable 256 × 8 or 128 × 16 organization, 2.7V–5.5V supply range, and industrial temperature operation (−40°C to +85°C). It delivers self-timed write cycles (≤10 ms), 1 million write endurance, and 100-year data retention for configuration storage in embedded control systems.
For engineers reviewing the AT93C56W-10SI datasheet, AT93C56W-10SI pinout, AT93C56W-10SI application, or AT93C56W-10SI equivalent, key selection criteria include low-voltage compatibility (2.7V min), SOIC-8 EIAJ package footprint, ORG-pin configurable memory width, and READY/BUSY status reporting via DO pin during write operations.
Technical Context
The AT93C56W-10SI 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 controlled by rising-edge-triggered CS and bit-aligned serial clocking on SK, supporting both x8 and x16 data widths selected by the ORG pin.
It operates across VCC = 2.7V–5.5V with AC timing scaling per voltage: fSK ≤ 1 MHz at 2.7V, tSKH/tSKL ≥ 250 ns, tWP ≤ 10 ms, and tCS ≥ 250 ns. Standby current is 6.0–10.0 µA at 2.7V, and output drive meets VOH ≥ VCC − 0.2 V / VOL ≤ 0.2 V under 100 µA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16 organization) |
| Supply Voltage Range | 2.7V to 5.5V - supports mixed-voltage system integration without level shifters |
| Write Cycle Time | ≤10 ms - enables deterministic firmware update timing in real-time systems |
| Endurance | 1 million write cycles - suitable for frequent calibration or logging applications |
| Data Retention | 100 years at 25°C - ensures long-term reliability in unattended equipment |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood environments |
| Interface | 3-wire serial (CS/SK/DI/DO) - minimal GPIO usage, no SPI hardware required |
Pinout & Package
AT93C56W-10SI is supplied in an 8-lead EIAJ SOIC (package code 8S2), 0.200" wide, with standard pinout: Pin 1 = CS, Pin 2 = SK, Pin 3 = DI, Pin 4 = DO, Pin 5 = VCC, Pin 6 = DC (no connect), Pin 7 = ORG, Pin 8 = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for full instruction cycle; high state triggers READY/BUSY status read on DO |
| SK | Serial Clock | Synchronous edge-triggered clock; rising edge samples DI, falling edge outputs DO; max 1 MHz at 2.7V |
| DI | Data Input | Serial command and address/data input; latched on SK rising edge; requires tDIS ≥ 100 ns setup at 2.7V |
| DO | Data Output | Tri-state serial output; provides read data or READY ('1') / BUSY ('0') status during write |
| VCC | Power Supply | 2.7V–5.5V supply; powers internal logic and EEPROM array; decoupling capacitor required |
| DC | Don't Connect | No internal connection; must remain floating or tied to GND/VCC per layout best practice |
| ORG | Organization Select | High = 128 × 16 mode; low = 256 × 8 mode; unconnected defaults to x16 via internal ~1 MΩ pull-up |
| GND | Ground Reference | Return path for VCC and I/O; separate analog/digital ground not required |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 256 × 8 or 128 × 16 via ORG pin - eliminates firmware rework when changing data width requirements |
| Self-timed write cycle | No external timing control needed; DO pin reports BUSY/READY status - simplifies host software polling logic |
| Low-voltage operation down to 2.7V | Valid across full industrial temperature range - enables direct interfacing with 3.3V microcontrollers without regulators |
| High-reliability nonvolatile storage | 1M write cycles and 100-year retention - certified for mission-critical parameter storage in medical and industrial controllers |
| ESD protection >4000V | HBM-rated robustness - reduces need for external TVS diodes in board-level ESD design |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and linearization tables in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration data accessed at power-on reset. Use Value: Eliminates recalibration after power loss; supports field updates via host MCU without requiring external programming hardware. |
Use Scenario: Saving user preferences (temperature setpoints, cycle modes, language) in washing machines and HVAC remotes. IC Role / Device Role / Timing Role: Low-power parameter store retaining settings across battery-backed or unplugged states. Use Value: Enables instant resume of last-used configuration; 2.7V operation allows direct connection to 3V coin-cell backup rails. |
| Automotive Body Control Module | Medical Diagnostic Equipment |
Use Scenario: Recording door lock/unlock history, mirror position memory, and lighting configuration in BCMs. IC Role / Device Role / Timing Role: Industrial-grade EEPROM interfaced to 8-bit/16-bit automotive MCUs via GPIO bit-banged 3-wire protocol. Use Value: −40°C to +85°C rating ensures reliability in under-dash environments; 1M endurance supports lifetime vehicle diagnostics logging. |
Use Scenario: Storing device serial numbers, calibration certificates, and regulatory compliance flags in portable ultrasound units. IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration vault with verified write integrity via READY/BUSY handshake. Use Value: Meets IEC 62304 traceability requirements; 100-year retention guarantees audit trail validity over product lifecycle. |
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-wire SPI interface, 2.5V–5.5V, 256 Kbit capacity, 5ms write time | Higher density and faster interface but requires dedicated SPI peripheral and larger PCB footprint | Select when migrating from bit-banged 3-wire to hardware SPI and needing >2Kbit storage |
| AT25256B-SSHL-T | 4-wire SPI, 2.5V–5.5V, 256 Kbit, 5ms write, WIP flag instead of READY/BUSY pin | Same voltage range and endurance, but status reporting requires polling STATUS register rather than DO pin | Prefer when existing SPI infrastructure exists and pin count permits extra CS line |
Compared with AT93C56W-10SI, M95256-WMN6TP offers higher density and SPI-native speed but increases MCU peripheral dependency, while AT25256B-SSHL-T maintains voltage compatibility but shifts status monitoring from hardware pin to register read - both require PCB layout changes and firmware adaptation.
Availability
AT93C56W-10SI is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical diagnostic equipment, and consumer appliance configuration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT93C56W-10SI 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 AT93Cxx family of serial EEPROMs with full backward compatibility and long-term product assurance.
The AT93C56W-10SI belongs to Microchip's legacy serial EEPROM product line designed for cost-sensitive, low-pin-count embedded systems requiring robust nonvolatile storage with minimal MCU resource usage.
FAQ
What is the maximum clock frequency supported by AT93C56W-10SI at 2.7V?
The AT93C56W-10SI supports a maximum SK clock frequency of 1 MHz when operating at VCC = 2.7V–5.5V, as specified in the AC Characteristics table. This limit ensures reliable setup/hold timing margins (tDIS, tDIH ≥ 100 ns) and stable data sampling across the full industrial temperature range.
How does the ORG pin affect memory organization in AT93C56W-10SI?
In AT93C56W-10SI, the ORG pin selects between two memory configurations: tied to VCC enables 128 × 16 (16-bit words), tied to GND enables 256 × 8 (8-bit words). If left unconnected, an internal ~1 MΩ pull-up defaults to x16 mode. This hardware-selectable width avoids firmware reconfiguration and supports flexible data alignment.
Can AT93C56W-10SI be used with a 1.8V microcontroller I/O interface?
No - AT93C56W-10SI is rated for 2.7V–5.5V operation only. While its absolute maximum ratings include 1.8V on pins, the functional DC and AC specifications (VIH/VIL thresholds, timing, drive strength) are not guaranteed below 2.7V. For 1.8V systems, use the AT93C56-10SI-1.8 variant instead.
What is the purpose of the DC pin on AT93C56W-10SI?
The DC (Don't Connect) pin on AT93C56W-10SI has no internal connection and must remain unconnected. It is a mechanical placeholder to maintain 8-lead SOIC (EIAJ) package symmetry and pin spacing. Routing or tying this pin may cause mechanical stress or unintended coupling; leave it floating per Microchip's packaging guidelines.
How is write completion status reported by AT93C56W-10SI?
AT93C56W-10SI reports write status via the DO pin: after initiating a WRITE, ERASE, ERAL, or WRAL instruction, bringing CS high (while SK remains low) causes DO to output '0' (BUSY) until completion, then '1' (READY). This hardware-ready signal eliminates fixed-delay polling and enables precise synchronization in time-critical firmware.
AT93C56W-10SI 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C56W-10SI FAQ
1.How can I place an order for AT93C56W-10SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56W-10SI 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 reliable?
The price and inventory of AT93C56W-10SI 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 is usually 5 days.
3.What payment methods are accepted for AT93C56W-10SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56W-10SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56W-10SI?
AT93C56W-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56W-10SI 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?
For technical support, including AT93C56W-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56W-10SI requirements.
6.How does Aetrix verify that AT93C56W-10SI is sourced from the original manufacturer or authorized distributors?
All AT93C56W-10SI 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 meets industry standards.
7.What is the process for return or replacement of AT93C56W-10SI?
All AT93C56W-10SI units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56W-10SI, 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 part is unused and in its original packaging.
Return procedure for AT93C56W-10SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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