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Microchip Technology AT93C56A-10SI-2.7
- Part No.:
- AT93C56A-10SI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT93C56A-10SI-2.7.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,777
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Product details
Overview
AT93C56A-10SI-2.7 from Microchip Technology (formerly Atmel) is a 2K-bit serial EEPROM with user-selectable 256 × 8 or 128 × 16 organization, 3-wire SPI-compatible interface, 2 MHz max clock at 5V, and 2.7V–5.5V supply operation. It delivers high reliability in industrial control modules requiring nonvolatile parameter storage with low-power standby.
For engineers reviewing the AT93C56A-10SI-2.7 datasheet, AT93C56A-10SI-2.7 pinout, AT93C56A-10SI-2.7 application, or AT93C56A-10SI-2.7 equivalent, key selection criteria include voltage range compatibility (2.7–5.5 V), x8/x16 organization flexibility via ORG pin, self-timed 10 ms write cycle, 1 million endurance cycles, and JEDEC SOIC-8 packaging for space-constrained PCBs.
Technical Context
The AT93C56A-10SI-2.7 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 7-bit opcodes and 9-bit (x8) or 8-bit (x16) addresses, supporting sequential read and status polling via DO during write/erase.
Operation is controlled by Chip Select (CS) activation, with ORG pin determining memory width-tied to VCC for 128 × 16 mode or GND for 256 × 8 mode. The device enters Erase/Write Enable (EWEN) state before programming and supports READY/BUSY status reporting on DO when CS is asserted post-instruction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16 organization) |
| Supply Voltage Range | 2.7 V to 5.5 V - enables direct interface with 3.3 V and 5 V microcontrollers without level shifting |
| Max Clock Frequency | 2 MHz at VCC = 5 V - sets maximum data throughput of ~200 kbit/s in x8 mode |
| Write Cycle Time | 10 ms maximum - defines minimum time between successive WRITE instructions |
| Endurance | 1 million write cycles - supports frequent calibration or configuration updates over product lifetime |
| Data Retention | 100 years at 25 °C - ensures long-term integrity of stored firmware parameters or calibration constants |
| Operating Temperature | -40 °C to +85 °C - qualified for industrial-grade embedded systems including motor drives and sensor nodes |
Pinout & Package
AT93C56A-10SI-2.7 is packaged in an 8-lead JEDEC SOIC (8S1), 0.150" wide, surface-mount package with standard gull-wing leads and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be held low for entire instruction sequence including address and data transfer |
| SK | Serial Clock | Synchronous edge-triggered clock input; rising edge latches DI, falling edge outputs DO |
| DI | Data Input | Serial command/address/data input; accepts start bit, opcode, address, and write data |
| DO | Data Output | Serial data output for READ; also reports READY/BUSY status during write/erase when CS is reasserted |
| VCC | Power Supply | Primary power rail; supplies internal logic and memory array; decoupling capacitor required near pin |
| GND | Ground | Reference return path for all signals and internal circuitry; must be low-impedance connection |
| ORG | Organization Select | Configures memory width: tied to VCC for 128 × 16, GND for 256 × 8; unconnected defaults to x16 |
| 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 x8 or x16 word width via ORG pin - eliminates need for software remapping in host MCU |
| Self-timed write cycle | No external timing control needed; internal timer completes erase/write in ≤10 ms - simplifies firmware timing logic |
| 3-wire serial interface | Requires only CS, SK, and bidirectional DI/DO - reduces MCU pin count and PCB routing complexity vs. parallel EEPROMs |
| Industrial temperature grade | Rated -40°C to +85°C - supports deployment in factory automation, HVAC controls, and outdoor metering equipment |
| Low standby current | 10 µA max at 2.7 V - extends battery life in always-on IoT edge nodes with infrequent configuration writes |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Storing calibrated sensor offsets and channel-specific gain settings across multiple analog input channels. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding persistent calibration data accessed at power-up by MCU firmware. Use Value: Enables field-replaceable I/O modules to retain calibration without external backup power or supercapacitors. | Use Scenario: Saving seat position memory, mirror angle presets, and lighting profiles for driver personalization. IC Role / Device Role / Timing Role: Dedicated parameter storage IC interfaced to body controller MCU via minimal GPIOs. Use Value: Supports 1 million write cycles - sufficient for >10 years of daily use at 300 cycles/year without wear-out risk. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Recording dose history, alarm thresholds, and maintenance logs with tamper-resistant audit trail. IC Role / Device Role / Timing Role: Secure configuration and event logging storage with deterministic write timing for regulatory compliance. Use Value: 100-year data retention meets FDA Class II device archival requirements for usage records. | Use Scenario: Storing tariff schedules, billing cycle counters, and firmware update metadata in utility-grade meters. IC Role / Device Role / Timing Role: Low-power EEPROM used during meter sleep mode to preserve critical billing state. Use Value: 10 µA standby current at 2.7 V minimizes battery drain in battery-backed meters operating 15+ years. |
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 capacity, SPI interface (4-wire), 5 MHz max clock, 1.8–5.5 V supply | Higher density and faster interface; requires additional /CS and /HOLD pins | Select when system needs >2 Kbit storage or SPI-native host interface without bit-banging |
| CAT24C02WI-GT3 | I²C interface, 2 Kbit, 1.7–5.5 V, 400 kHz standard mode, 1.5 ms write time | Two-wire bus sharing capability; no ORG pin or x16 mode; lower ESD rating (2 kV HBM) | Prefer for designs already using I²C peripherals and where pin count allows SDA/SCL allocation |
Compared with M95256-WMN6TP and CAT24C02WI-GT3, the AT93C56A-10SI-2.7 offers unique hardware-selectable x8/x16 organization and true 3-wire simplicity (no dedicated /HOLD or SDA/SCL), making it optimal for cost-sensitive, pin-constrained industrial controllers needing flexible byte/word access patterns.
Availability
AT93C56A-10SI-2.7 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical devices, and smart metering applications requiring stable component supply and long-term lifecycle support.
Supply support for AT93C56A-10SI-2.7 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 devices, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT93C56A-10SI-2.7 belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-pin-count, low-power embedded systems requiring reliable, field-programmable configuration storage with minimal MCU resource overhead.
FAQ
What is the memory organization of AT93C56A-10SI-2.7 and how is it selected?
The AT93C56A-10SI-2.7 provides 2048 bits organized as either 256 × 8 or 128 × 16 words. Organization is selected by the ORG pin: connect to VCC for 128 × 16 mode, to GND for 256 × 8 mode. If left unconnected, the internal 1 MΩ pull-up selects x16 mode. This hardware configuration avoids firmware overhead and ensures deterministic boot-time initialization in the AT93C56A-10SI-2.7.
Does AT93C56A-10SI-2.7 require an external erase cycle before writing?
No, the AT93C56A-10SI-2.7 does not require a separate erase cycle. Each WRITE instruction automatically erases the target location prior to programming. The self-timed write cycle (≤10 ms) handles both erase and write internally. However, the device must first enter the Erase/Write Enable (EWEN) state via the EWEN instruction before any WRITE or ERASE command is accepted - this safety feature prevents accidental overwrites in the AT93C56A-10SI-2.7.
What is the function of the DO pin during write operations in AT93C56A-10SI-2.7?
During write operations, the DO pin of the AT93C56A-10SI-2.7 reports READY/BUSY status when Chip Select (CS) is reasserted after instruction initiation. A logic '1' indicates completion and readiness for the next command; a logic '0' means the write is still in progress. This polling mechanism eliminates the need for fixed delay loops and enables efficient host MCU resource management in real-time systems using the AT93C56A-10SI-2.7.
Can AT93C56A-10SI-2.7 operate at 1.8 V?
No, the AT93C56A-10SI-2.7 is specified for 2.7 V to 5.5 V operation only. The '-2.7' suffix denotes the low-voltage variant within that range. For 1.8 V operation, the correct part is AT93C56A-10SI-1.8, which has different DC characteristics and is not interchangeable with the AT93C56A-10SI-2.7 due to distinct internal voltage regulation and timing behavior.
Is AT93C56A-10SI-2.7 pin-compatible with other packages in the AT93C56A family?
Yes, the AT93C56A-10SI-2.7 in 8-lead JEDEC SOIC (8S1) shares identical pinout and electrical behavior with other AT93C56A variants in PDIP (8P3), TSSOP (8A2), MAP (8Y1), and dBGA2 (8U3-1) packages. All share the same CS/SK/DI/DO/VCC/GND/ORG/DC pin mapping and functional timing, enabling drop-in replacement across form factors - a key design advantage of the AT93C56A-10SI-2.7.
AT93C56A-10SI-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT93C56A-10SI-2.7 FAQ
1.How can I place an order for AT93C56A-10SI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56A-10SI-2.7 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 AT93C56A-10SI-2.7 reliable?
The price and inventory of AT93C56A-10SI-2.7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C56A-10SI-2.7 is usually 5 days.
3.What payment methods are accepted for AT93C56A-10SI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56A-10SI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56A-10SI-2.7?
AT93C56A-10SI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56A-10SI-2.7 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 AT93C56A-10SI-2.7?
For technical support, including AT93C56A-10SI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56A-10SI-2.7 requirements.
6.How does Aetrix verify that AT93C56A-10SI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT93C56A-10SI-2.7 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 AT93C56A-10SI-2.7 meets industry standards.
7.What is the process for return or replacement of AT93C56A-10SI-2.7?
All AT93C56A-10SI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56A-10SI-2.7, 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 AT93C56A-10SI-2.7 part is unused and in its original packaging.
Return procedure for AT93C56A-10SI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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