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Microchip Technology AT93C56W-10SC
- Part No.:
- AT93C56W-10SC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C56W-10SC.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,418
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Product details
Overview
AT93C56W-10SC from Microchip Technology (formerly Atmel) is a 2K-bit serial EEPROM with 3-wire interface, user-selectable 256 × 8 or 128 × 16 organization via ORG pin, 2.7V–5.5V supply range, and 10 ms max self-timed write cycle. It operates in industrial temperature range (−40°C to +85°C) and is used for configuration storage in embedded controllers, power management ICs, and sensor calibration modules.
For engineers reviewing the AT93C56W-10SC datasheet, AT93C56W-10SC pinout, AT93C56W-10SC application, or AT93C56W-10SC equivalent, key selection criteria include low-voltage operation down to 2.7V, 8-lead EIAJ SOIC (8S2) package compatibility, 1 million write endurance, 100-year data retention, and support for READ/ERASE/WRITE instructions with READY/BUSY status reporting.
Technical Context
The AT93C56W-10SC implements a synchronous 3-wire serial interface with Chip Select (CS), Serial Clock (SK), and bidirectional Data I/O (DI/DO). Its internal architecture supports dual memory organization modes selected by the ORG pin: 128 words × 16 bits (ORG = VCC) or 256 words × 8 bits (ORG = GND).
Write operations require prior EWEN instruction and are self-timed up to 10 ms; no external erase cycle is needed. The DO pin provides real-time READY/BUSY status during programming when CS is asserted after tCS ≥ 250 ns, enabling host synchronization without polling overhead.
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 - enables direct interfacing with 3.3V and 5V microcontrollers without level shifting |
| Max Clock Frequency | 1 MHz at 2.7V - 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 - supports frequent field updates in calibration or logging applications |
| Data Retention | 100 years - ensures long-term reliability in unpowered storage of critical configuration data |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded systems including motor control and power supplies |
Pinout & Package
AT93C56W-10SC is housed in an 8-lead EIAJ SOIC package (8S2), measuring 0.200" wide with standard gull-wing leads. Pin 1 is marked by a beveled corner or notch; the package is RoHS-compliant and rated for surface-mount reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; device responds only when CS is low; DO enters high-impedance state when CS is high |
| SK | Serial Clock | Synchronizes all data transfers; rising edge samples DI, falling edge outputs DO |
| DI | Serial Data Input | Receives instruction opcodes, addresses, and write data; latched on SK rising edge |
| DO | Serial Data Output | Outputs read data or READY/BUSY status; driven only when CS is low and instruction requires response |
| GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance connection |
| VCC | Power Supply | Provides operating voltage (2.7V–5.5V); decoupling capacitor (0.1 µF) required near pin |
| ORG | Organization Select | Configures memory map: tied to VCC → 128 × 16 mode; tied to GND → 256 × 8 mode |
| DC | Don't Connect | No internal connection; must remain floating or grounded per layout guidelines to avoid noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 256 × 8 or 128 × 16 layout via ORG pin - eliminates firmware adaptation across variants |
| Self-timed write cycle | Internal timing engine completes writes in ≤10 ms without host clocking - simplifies software driver design |
| READY/BUSY status reporting | DO pin returns logic '0' during write/erase and '1' when complete - enables deterministic host polling |
| Low standby current | 10 µA max at 2.7V - reduces system power in battery-backed or always-on applications |
| ESD protection | Exceeds 4000V HBM - improves robustness during board handling and system integration |
Applications
| Industrial Motor Control | Smart Power Supply |
|---|---|
Use Scenario: Storing motor calibration coefficients, fault history, and runtime parameters in variable-speed drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime via SPI-compatible 3-wire bus. Use Value: Enables field-upgradable calibration without firmware changes; 100-year retention prevents data loss over equipment lifetime. |
Use Scenario: Holding output voltage/current setpoints, protection thresholds, and thermal derating curves in programmable DC supplies. IC Role / Device Role / Timing Role: Serial configuration memory interfaced to MCU's GPIO-controlled bit-banged port. Use Value: Supports remote recalibration via digital interface; 2.7V operation allows direct connection to 3.3V supply rails. |
| Medical Sensor Module | Automotive Body Controller |
Use Scenario: Saving sensor offset/gain trim values and patient-specific settings in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-power EEPROM storing factory-trimmed analog front-end parameters. Use Value: 1 µA standby current extends battery life; 1M endurance accommodates repeated recalibration during service. |
Use Scenario: Retaining door lock configuration, mirror position presets, and lighting profiles in body control modules. IC Role / Device Role / Timing Role: Industrial-temperature EEPROM accessed during vehicle startup and user interaction. Use Value: −40°C to +85°C rating ensures reliable operation across automotive ambient conditions; EIAJ SOIC fits compact PCB layouts. |
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, 5ms write cycle, 40 MHz max clock | Higher density and faster interface; requires SPI hardware peripheral instead of GPIO bit-banging | Select when system has dedicated SPI controller and needs >2Kbit capacity |
| CAT93C56VI-GT3 | 2K-bit 3-wire EEPROM, 1.8V–5.5V, 5ms write cycle, same 8S2 package | Broadens voltage range to 1.8V; slightly faster write timing but identical pinout and instruction set | Prefer for ultra-low-voltage designs where 1.8V operation is mandatory |
Compared with M95256-WMN6TP and CAT93C56VI-GT3, the AT93C56W-10SC offers optimal balance of industrial temperature support, proven 2.7V–5.5V compatibility, and drop-in replacement capability in legacy 3-wire designs using GPIO-driven interfaces.
Availability
AT93C56W-10SC is available at Aetrix Electronics and suitable for industrial motor control, smart power supply, medical sensor module, and automotive body controller applications requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for AT93C56W-10SC 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 product support, documentation, and manufacturing continuity for the AT93Cxx family.
The AT93C56W-10SC belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained embedded systems requiring reliable nonvolatile storage with minimal external components.
FAQ
What is the memory organization of the AT93C56W-10SC?
The AT93C56W-10SC supports two memory configurations: 256 words × 8 bits or 128 words × 16 bits, selected by the ORG pin voltage. When ORG is tied to VCC, the 128 × 16 mode is active; when tied to GND, the 256 × 8 mode is selected. This flexibility allows the AT93C56W-10SC to match varying data-width requirements without changing firmware structure.
Does the AT93C56W-10SC require an external erase command before writing?
No, the AT93C56W-10SC does not require a separate erase command. Each WRITE instruction automatically erases and programs the target location in a single self-timed operation. However, an EWEN (Erase/Write Enable) instruction must precede any WRITE or ERASE command, and the AT93C56W-10SC remains in EWDS (disabled) state after power-up until EWEN is issued.
How is READY/BUSY status reported on the AT93C56W-10SC?
The AT93C56W-10SC reports READY/BUSY status on the DO pin: a logic '0' indicates ongoing write/erase activity, while a logic '1' confirms completion. To read this status, the host must keep CS low for ≥250 ns after initiating the operation, then raise CS while maintaining SK low - the DO pin transitions within tSV (≤500 ns at 2.7V).
What package type is used for the AT93C56W-10SC?
The AT93C56W-10SC uses an 8-lead EIAJ SOIC package (8S2), 0.200" wide with gull-wing leads. This package is distinct from JEDEC SOIC (8S1) and is compatible with standard SMT reflow profiles. The 'W' in the part number explicitly denotes the EIAJ SOIC variant, confirming mechanical and soldering compatibility for AT93C56W-10SC.
Can the AT93C56W-10SC operate at 1.8V?
No, the AT93C56W-10SC is rated for 2.7V to 5.5V operation only. Devices supporting 1.8V operation carry the '-1.8' suffix (e.g., AT93C56-10SC-1.8) and are not functionally interchangeable with the AT93C56W-10SC. Attempting to power the AT93C56W-10SC below 2.7V may result in unreliable communication or data corruption.
AT93C56W-10SC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C56W-10SC FAQ
1.How can I place an order for AT93C56W-10SC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56W-10SC 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-10SC reliable?
The price and inventory of AT93C56W-10SC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C56W-10SC is usually 5 days.
3.What payment methods are accepted for AT93C56W-10SC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56W-10SC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56W-10SC?
AT93C56W-10SC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56W-10SC 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-10SC?
For technical support, including AT93C56W-10SC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56W-10SC requirements.
6.How does Aetrix verify that AT93C56W-10SC is sourced from the original manufacturer or authorized distributors?
All AT93C56W-10SC 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-10SC meets industry standards.
7.What is the process for return or replacement of AT93C56W-10SC?
All AT93C56W-10SC units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56W-10SC, 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-10SC part is unused and in its original packaging.
Return procedure for AT93C56W-10SC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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