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Microchip Technology AT93C56-10SI-1.8
- Part No.:
- AT93C56-10SI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C56-10SI-1.8.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,932
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Product details
Overview
AT93C56-10SI-1.8 from Microchip Technology (formerly Atmel) is a 2-kbit serial EEPROM with three-wire interface, supporting 1.8V to 5.5V operation and user-selectable 256 × 8 or 128 × 16 organization via the ORG pin. It delivers 2 MHz clock rate at 5V, 10 ms max self-timed write cycle, 1 million write endurance, and 100-year data retention. It is used in industrial control modules for parameter storage under low-voltage battery backup.
For engineers reviewing the AT93C56-10SI-1.8 datasheet, AT93C56-10SI-1.8 pinout, AT93C56-10SI-1.8 application, or AT93C56-10SI-1.8 equivalent, key selection criteria include VCC range compatibility (1.8–5.5V), SOIC-8 package footprint, three-wire serial timing constraints, and ORG-pin-configurable memory width for legacy MCU interface alignment.
Technical Context
The AT93C56-10SI-1.8 implements a synchronous three-wire serial protocol (CS/SK/DI/DO) with start-bit–driven instruction decoding. Its internal logic supports seven instructions-READ, EWEN, ERASE, WRITE, ERAL, WRAL, and EWDS-with address lengths of 9 bits (x8) or 8 bits (x16), and includes on-chip Ready/Busy status reporting via DO during write/erase cycles.
It features dual-voltage qualification: full AC/DC specifications validated across 1.8V–5.5V, including tSKH/tSKL ≥1000 ns at 1.8V, ISB1 ≤0.1 µA standby current at 1.8V, and VOL2 ≤0.2 V at IOL = 0.15 mA. The ORG pin selects organization but is not functional on 1.8V-only variants per datasheet Note on p.2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16 configuration) |
| Supply Voltage Range | 1.8V to 5.5V - enables direct integration with 1.8V logic and mixed-voltage systems without level shifters |
| Max Clock Frequency | 2 MHz at VCC = 5.0V - sets maximum serial throughput at ~200 kbps for 8-bit reads |
| Write Cycle Time | 10 ms maximum - defines minimum time between successive WRITE commands; no external delay required |
| Endurance | 1 million write cycles - supports field firmware parameter logging over 10+ years at 274 writes/day |
| Data Retention | 100 years at TA ≤ 85°C - ensures calibration data integrity across product lifecycle without refresh |
| Operating Temperature | −40°C to +85°C - qualified for industrial ambient environments including motor control enclosures |
Pinout & Package
AT93C56-10SI-1.8 is supplied in an 8-lead JEDEC SOIC (8S1) package: 0.150" wide, 5.00 mm × 3.99 mm body, 1.27 mm lead pitch. Pin 1 is bottom-left corner with notch indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be held low for entire instruction sequence; controls DO high-impedance state |
| SK | Serial Clock | Input; rising-edge synchronized data transfer; min/max timing varies with VCC (e.g., tSKH ≥1000 ns at 1.8V) |
| DI | Data Input | Instruction/address/data input; latched on SK rising edge; requires tDIS/tDIH setup/hold per VCC |
| DO | Data Output | Tri-state output; delivers read data or Ready/Busy status; transitions synchronized to SK rising edge |
| GND | Ground Reference | Primary return path for VCC and I/O; decoupling capacitor must be placed adjacent to this pin |
| VCC | Power Supply | 1.8V–5.5V supply; ICC ≤2.0 mA during READ/WRITE; ISB1 ≤0.1 µA in standby at 1.8V |
| ORG | Organization Select | Connect to VCC for 128×16 mode, GND for 256×8 mode; not functional on 1.8V-only devices per datasheet |
| DC | No Connect | Internally unused; must be left floating or tied to GND/VCC per PCB layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Three-wire serial interface | Reduces MCU GPIO count vs. SPI; compatible with legacy 8051/AVR bit-banged drivers using CS/SK/DI/DO |
| User-selectable memory organization | Supports both byte-oriented (256×8) and word-oriented (128×16) access to match host processor bus width |
| Self-timed write cycle | Eliminates need for external write-complete polling delay; DO reports Ready/Busy if CS raised mid-cycle |
| Low-power standby | ISB1 ≤0.1 µA at 1.8V enables >10-year battery-backed storage in metering applications |
| Automotive-grade qualification | Extended temperature (−40°C to +85°C) and lead-free/halogen-free packaging meet AEC-Q200 stress test requirements |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients in pressure transmitters operating from 2.0V coin cells. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during power-up initialization; ORG pin fixed to GND for 256×8 byte-aligned reads. Use Value: Enables single-byte updates without reprogramming full sectors; 1.8V operation eliminates need for boost converters in energy-harvesting nodes. | Use Scenario: Retaining user-selected wash cycles, spin speeds, and language settings in front-load washing machines with 3.3V main MCU. IC Role / Device Role / Timing Role: System configuration store updated infrequently (<10×/day); accessed via bit-banged GPIO due to lack of hardware SPI. Use Value: 100-year data retention prevents settings loss over appliance lifetime; SOIC-8 footprint allows drop-in replacement of legacy 93C46 designs. |
| Automotive Body Control Module | Medical Infusion Pump Setup |
Use Scenario: Saving door lock/unlock preferences and mirror position memory in 12V automotive systems with local 3.3V LDO rails. IC Role / Device Role / Timing Role: EEPROM peripheral on low-speed LIN or discrete GPIO bus; withstands load-dump transients via robust ESD rating. Use Value: AEC-Q200 qualification ensures reliability under vibration/temperature cycling; 1M endurance supports dealer reprogramming events. | Use Scenario: Storing drug library profiles, alarm thresholds, and clinician access codes in battery-powered portable infusion pumps. IC Role / Device Role / Timing Role: Secure parameter vault isolated from main CPU; write-protected via EWDS after initial commissioning. Use Value: 1.8V operation extends single-cell Li-ion runtime; 100-year retention meets FDA 510(k) long-term data integrity requirements. |
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 (4-wire), 2.5–5.5V supply, 20 MHz clock, WLCSP package | Higher density, faster interface, but requires SPI hardware support and different command set | Select when migrating to higher-capacity storage with existing SPI infrastructure and board space for WLCSP rework |
| AT25020B-MAHL-T | 2-Kbit SPI EEPROM, 1.8–5.5V, SOIC-8, 20 MHz, built-in write protection registers | Same pinout and voltage range, but SPI protocol replaces three-wire; no ORG pin for width selection | Choose for simplified driver porting where MCU already supports SPI and byte-width flexibility is not required |
Compared with M95256-WMN6TP and AT25020B-MAHL-T, the AT93C56-10SI-1.8 offers unique ORG-pin configurability and minimal GPIO usage, making it optimal for resource-constrained 8-bit microcontrollers lacking SPI peripherals but requiring field-updatable calibration data.
Availability
AT93C56-10SI-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, and automotive body control modules requiring stable component supply and long-lifecycle support.
Supply support for AT93C56-10SI-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 is a global semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions, with broad industrial and automotive qualification coverage.
The AT93Cxx family was designed for cost-sensitive, low-pin-count embedded systems needing reliable, low-voltage serial EEPROM with minimal MCU resource overhead and flexible memory width configuration.
FAQ
What is the function of the ORG pin on the AT93C56-10SI-1.8?
The ORG pin selects internal memory organization: tied to VCC for 128 × 16 mode, or to GND for 256 × 8 mode. However, per the official datasheet (p.2), the ORG pin is not functional on 1.8V-only variants like the AT93C56-10SI-1.8 - it defaults to x16 mode regardless of pin state. This behavior is explicitly documented in the "Note" under Figure 1.
Does the AT93C56-10SI-1.8 support true 1.8V operation across all specifications?
Yes, the AT93C56-10SI-1.8 is fully characterized for 1.8V–5.5V operation. DC parameters (e.g., ISB1 ≤0.1 µA, VOL2 ≤0.2 V) and AC timing (e.g., tSKH/tSKL ≥1000 ns) are specified at 1.8V in Tables 3 and 4. All functionality - including READ, WRITE, and EWEN - is guaranteed within this range without derating.
Can the AT93C56-10SI-1.8 be used as a direct replacement for AT93C46-10SI-1.8?
No - while both share the same SOIC-8 package and 1.8V operation, the AT93C56-10SI-1.8 provides 2 Kbit (2048-bit) capacity versus 1 Kbit (1024-bit) for the AT93C46-10SI-1.8. Address widths differ (9-bit vs. 7-bit for x8 mode), and instruction timing margins are not identical. Board-level replacement requires firmware and timing validation.
What is the maximum clock frequency supported by the AT93C56-10SI-1.8 at 1.8V?
At 1.8V, the AT93C56-10SI-1.8 supports a maximum SK clock frequency of 0.25 MHz, as specified in Table 4 (fSK Max = 0.25 MHz for 1.8V ≤ VCC ≤ 5.5V). This is significantly lower than the 2 MHz maximum at 5V, reflecting reduced internal timing margin at low voltage.
How does the AT93C56-10SI-1.8 indicate write completion during a programming cycle?
The AT93C56-10SI-1.8 outputs Ready/Busy status on the DO pin: if CS is brought high after ≥250 ns low-time (tCS), DO goes low during active programming and high when complete. This allows host software to poll status without fixed delays. The feature is valid only if CS remains low for the full tCS before being raised.
AT93C56-10SI-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:
- 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:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C56-10SI-1.8 FAQ
1.How can I place an order for AT93C56-10SI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56-10SI-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 AT93C56-10SI-1.8 reliable?
The price and inventory of AT93C56-10SI-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 AT93C56-10SI-1.8 is usually 5 days.
3.What payment methods are accepted for AT93C56-10SI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56-10SI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56-10SI-1.8?
AT93C56-10SI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56-10SI-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 AT93C56-10SI-1.8?
For technical support, including AT93C56-10SI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56-10SI-1.8 requirements.
6.How does Aetrix verify that AT93C56-10SI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT93C56-10SI-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 AT93C56-10SI-1.8 meets industry standards.
7.What is the process for return or replacement of AT93C56-10SI-1.8?
All AT93C56-10SI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56-10SI-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 AT93C56-10SI-1.8 part is unused and in its original packaging.
Return procedure for AT93C56-10SI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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