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Microchip Technology AT93C56-10SI
- Part No.:
- AT93C56-10SI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C56-10SI.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,797
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Product details
Overview
AT93C56-10SI from Microchip Technology (formerly Atmel) is a 2K-bit serial EEPROM with 3-wire interface, supporting user-selectable 256 × 8 or 128 × 16 organization via the ORG pin. It operates across 2.7V–5.5V supply, features 10 ms max self-timed write cycle, 1 million write endurance, and 100-year data retention. It is used in industrial control systems for storing calibration data, configuration registers, and firmware parameters.
For engineers reviewing the AT93C56-10SI datasheet, AT93C56-10SI pinout, AT93C56-10SI application, or AT93C56-10SI equivalent, key selection criteria include voltage range compatibility (2.7V–5.5V), industrial temperature rating (−40°C to +85°C), SOIC-8 package footprint, 2 MHz clock support at 5V, and ORG-pin configurable memory width.
Technical Context
The AT93C56-10SI implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command set including READ, WRITE, ERASE, EWEN, and EWDS. Its internal logic decodes 9-bit addresses (A8–A0) for 2K-bit capacity and supports both x8 and x16 word widths depending on ORG pin state.
Write operations require explicit Erase/Write Enable (EWEN) before programming and return READY/BUSY status via DO when CS is asserted post-command. The device uses internal charge-pump circuitry for write/erase, eliminating need for external high-voltage programming supplies.
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 | 2 MHz at VCC = 5V - supports high-speed serial configuration in time-critical boot sequences |
| Write Cycle Time | 10 ms maximum - defines minimum interval between successive write commands; impacts firmware update latency |
| Endurance | 1 million write cycles - ensures reliable operation over 10+ years in field-updatable industrial nodes |
| Data Retention | 100 years at 25°C - guarantees long-term storage integrity of calibration coefficients and security keys |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded applications including motor drives and PLC modules |
Pinout & Package
AT93C56-10SI is housed in an 8-lead JEDEC-standard SOIC package (8S1), 0.150" wide, with standard gull-wing lead form. Pin 1 is marked by notch or dot; package meets RoHS requirements and is compatible with reflow soldering profiles per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; device ignores SK/DI until CS is asserted low |
| 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 | Drives read data, READY/BUSY status, or high-impedance when CS is high |
| VCC | Power Supply | Primary power rail; must be stable within 2.7V–5.5V during all operations |
| GND | Ground | Reference for all I/O and internal circuitry; requires low-impedance connection to system ground plane |
| ORG | Organization Select | Connect to VCC for 128 × 16 mode, GND for 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 per layout best practice (not driven) |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Runtime-configurable 256 × 8 or 128 × 16 via ORG pin - eliminates need for separate part numbers for byte- vs word-oriented systems |
| Self-timed write cycle | No external timing control required; internal logic manages erase/write sequence and asserts BUSY on DO - simplifies host firmware design |
| Industrial temperature grade | Rated −40°C to +85°C - validated for use in factory automation, energy metering, and outdoor telecom equipment |
| ESD protection | >4000V HBM - enhances robustness during board handling and in-system programming in noisy industrial environments |
| Low standby current | 10 µA max at 2.7V - reduces quiescent power in battery-backed or always-on monitoring subsystems |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing temperature-compensated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization and runtime recalibration. Use Value: Enables field-adjustable calibration without firmware reflash; ORG pin flexibility supports either 8-bit ADC register mapping or 16-bit precision coefficient storage. |
Use Scenario: Holding boot-time configuration flags (e.g., COM port baud rate, CAN node ID, display brightness) in medical diagnostic devices. IC Role / Device Role / Timing Role: Serial configuration memory read early in boot sequence to configure peripheral registers before main application starts. Use Value: Reduces BOM count by replacing multiple jumpers/DIP switches; 2.7V operation allows direct interface with 3.3V microcontroller I/O without level shifters. |
| Motor Drive Parameter Storage | Smart Meter Firmware Patch Storage |
Use Scenario: Saving motor-specific tuning parameters (PID gains, current limits, commutation angles) in variable-frequency drives. IC Role / Device Role / Timing Role: Persistent memory updated via service port during commissioning or maintenance; accessed at startup to load operational profile. Use Value: Supports multi-motor fleet deployment with unique tuning sets; 1M endurance ensures reliability across 10+ years of periodic updates. |
Use Scenario: Storing small firmware patches or cryptographic keys for secure over-the-air updates in utility smart meters. IC Role / Device Role / Timing Role: Secure nonvolatile storage for critical update payloads; accessed only during authenticated bootloader execution. Use Value: 100-year data retention guarantees key integrity over full product lifecycle; ESD-hardened pins improve reliability during field programming. |
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, 5V-only supply (4.5–5.5V), no ORG pin, 5 ms write cycle | Lacks voltage flexibility and organization select; requires SPI-capable host, not 3-wire | Choose when migrating to SPI-based designs with higher density and faster throughput; not drop-in compatible |
| STK12C68-5LH1T | NVSRAM with 8K × 8 organization, parallel interface, 5V supply, automatic store-on-power-loss | Different architecture (SRAM + backup capacitor), no serial interface, larger footprint | Select for applications requiring ultra-fast random writes and instant nonvolatility without software-managed write cycles |
Compared with M95256-WMN6TP and STK12C68-5LH1T, the AT93C56-10SI uniquely balances 2.7V–5.5V operation, pin-selectable memory width, and minimal 3-wire interface - making it optimal for resource-constrained industrial microcontrollers lacking SPI peripherals but requiring flexible, low-power configuration storage.
Availability
AT93C56-10SI is available at Aetrix Electronics and suitable for industrial control, smart metering, and motor drive applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for AT93C56-10SI 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 maintains full technical and manufacturing continuity for the AT93Cxx EEPROM family. The company specializes in microcontrollers, analog, and memory solutions for industrial, automotive, and consumer markets.
The AT93C56-10SI belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems needing reliable nonvolatile storage with minimal interface overhead and broad supply voltage tolerance.
FAQ
What is the memory organization of AT93C56-10SI, and how is it selected?
The AT93C56-10SI provides 2048 bits organized as either 256 × 8 or 128 × 16, selected by the ORG pin: tied to VCC for x16 mode, GND for x8 mode. An internal ~1 MΩ pull-up defaults to x16 if ORG is left unconnected. This configuration is static per power cycle and does not require software setup. The AT93C56-10SI datasheet confirms this behavior applies to all 2.7V–5.5V variants including the -10SI suffix.
Does AT93C56-10SI support 3.3V microcontrollers directly?
Yes, AT93C56-10SI operates from 2.7V to 5.5V, making it fully compatible with 3.3V logic levels without level-shifting circuitry. Its VIH and VIL thresholds scale with VCC (e.g., VIH ≥ 0.7×VCC at 2.7V–2.7V), and output VOH/VOL meet 3.3V interface requirements. The AT93C56-10SI has been validated in designs using STM32, PIC, and MSP430 microcontrollers running at 3.3V.
What is the maximum clock frequency supported by AT93C56-10SI at 3.3V?
At VCC = 3.3V, the AT93C56-10SI supports up to 1 MHz clock frequency (fSK), as specified in the AC Characteristics table for the 2.7V–5.5V operating range. While rated for 2 MHz at 5V, timing margins reduce at lower voltages; 1 MHz ensures robust operation across temperature and process variation. This value is explicitly confirmed for AT93C56-10SI in the official datasheet Rev. 0172L.
How does the AT93C56-10SI indicate write completion?
The AT93C56-10SI outputs READY/BUSY status on the DO pin when CS is asserted high after initiating a WRITE or ERASE command. A logic '1' on DO indicates completion and readiness for next instruction; '0' means operation is still in progress. This status is valid only if CS is held low for ≥250 ns before going high. The AT93C56-10SI does not require polling delay timers when using this hardware-ready signal.
Is AT93C56-10SI pin-compatible with AT93C56-10PI or AT93C56-10SC?
Yes, AT93C56-10SI shares identical pinout and electrical characteristics with AT93C56-10PI (industrial PDIP) and AT93C56-10SC (commercial SOIC), differing only in package type and temperature grade. All three use the same 8-lead SOIC footprint for -10SI and -10SC, and the same 8P3 PDIP outline for -10PI. The AT93C56-10SI datasheet confirms mechanical and functional equivalence across these ordering variants.
AT93C56-10SI 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
AT93C56-10SI FAQ
1.How can I place an order for AT93C56-10SI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56-10SI 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 AT93C56-10SI reliable?
The price and inventory of AT93C56-10SI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C56-10SI is usually 5 days.
3.What payment methods are accepted for AT93C56-10SI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56-10SI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56-10SI?
AT93C56-10SI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56-10SI 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 AT93C56-10SI?
For technical support, including AT93C56-10SI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56-10SI requirements.
6.How does Aetrix verify that AT93C56-10SI is sourced from the original manufacturer or authorized distributors?
All AT93C56-10SI 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 AT93C56-10SI meets industry standards.
7.What is the process for return or replacement of AT93C56-10SI?
All AT93C56-10SI units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56-10SI, 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 AT93C56-10SI part is unused and in its original packaging.
Return procedure for AT93C56-10SI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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