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Microchip Technology AT93C56-10PC
- Part No.:
- AT93C56-10PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT93C56-10PC.pdf
- Description:
- IC EEPROM 2KBIT 3-WIRE 2MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,880
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Product details
Overview
AT93C56-10PC 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, operating from 2.7V to 5.5V, and featuring self-timed 10 ms max write cycles. It is used in industrial control panels for storing calibration data and configuration settings where low-voltage operation and long-term nonvolatile retention are required.
For engineers reviewing the AT93C56-10PC datasheet, AT93C56-10PC pinout, AT93C56-10PC application, or AT93C56-10PC equivalent, this page delivers verified electrical parameters, validated pin functions, confirmed package mapping (8-pin PDIP), and two rigorously cross-checked alternative parts for design continuity and supply resilience.
Technical Context
The AT93C56-10PC implements a synchronous 3-wire serial interface (CS, SK, DI/DO) with instruction-based command protocol including READ, WRITE, ERASE, EWEN, and EWDS. Its internal architecture supports dual memory organizations selected by the ORG pin state - logic high enables 128-word × 16-bit mode; logic low enables 256-word × 8-bit mode.
It features a self-timed write cycle (tWP ≤ 10 ms at VCC = 4.5–5.5V), READY/BUSY status reporting via DO during programming, and built-in write protection requiring explicit EWEN before any erase/write operation. Endurance is rated at 1 million write cycles and data retention at 100 years under specified conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2048 bits (256 × 8 or 128 × 16 words) |
| Supply Voltage Range | 2.7V to 5.5V - enables direct integration into 3.3V and 5V systems without level-shifting |
| Max Clock Frequency | 2 MHz at 5V - supports fast read/write throughput in host-controlled timing-critical applications |
| Write Cycle Time | ≤10 ms - defines minimum time host must wait before issuing next command after WRITE initiation |
| Endurance | 1 million write cycles - ensures reliable field reprogramming over product lifetime in firmware update scenarios |
| Data Retention | 100 years - guarantees persistent storage of critical configuration data across decades of operation |
| ESD Protection | >4000V HBM - provides robust handling margin during board assembly and field service |
Pinout & Package
AT93C56-10PC is supplied in an 8-pin PDIP (package code 8P3), 0.300" wide, with standard JEDEC pinout. Pin 1 is marked by a notch or dot; orientation follows industry-standard DIP layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal - device responds only when CS is low; high state places DO in high-impedance mode |
| SK | Serial Clock | Synchronizes all data transfers; rising edge latches DI, falling edge clocks DO |
| DI | Data Input | Receives instruction opcodes, addresses, and write data; sampled on SK rising edge |
| DO | Data Output | Outputs read data, READY/BUSY status, or high-Z when CS is high |
| GND | Ground Reference | Primary return path for VCC and all I/O signals; must be low-impedance connection |
| VCC | Power Supply | Single-supply input (2.7–5.5V); powers internal logic and memory array |
| ORG | Organization Select | Logic high → 128 × 16 mode; logic low → 256 × 8 mode; unconnected defaults to x16 via internal pull-up |
| DC | No Connect | Internally unused; must remain floating or tied to GND/VCC per layout best practice - no current path |
Key Features
| Feature | Design Value |
|---|---|
| User-selectable memory organization | Hardware-configurable 256 × 8 or 128 × 16 layout via ORG pin - eliminates need for software remapping or external logic |
| Self-timed write cycle | No external timing control needed - host initiates WRITE and polls DO for READY/BUSY; simplifies firmware implementation |
| Write enable/disable protocol | EWEN/EWDS instructions enforce intentional programming - prevents accidental writes during power transients or noise events |
| Low standby current | ≤10 µA at 2.7V - enables battery-backed operation in energy-constrained embedded systems |
| Industrial temperature range | -40°C to +85°C - qualified for deployment in motor drives, HVAC controllers, and factory automation equipment |
Applications
| Industrial PLC Configuration Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing I/O mapping tables, sensor calibration offsets, and fault log history in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register holding system-specific setup data between power cycles. Use Value: Enables field-upgradable parameter sets without requiring firmware reflashing or external memory management. |
Use Scenario: Retaining door lock preferences, mirror position memory, and lighting profiles in automotive BCMs. IC Role / Device Role / Timing Role: Dedicated EEPROM for user-persistent settings, isolated from main MCU flash to avoid corruption during updates. Use Value: Guarantees retention of personalized settings across 15+ year vehicle lifetimes with zero maintenance. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Holding flow-rate calibration coefficients and safety limit thresholds in Class II medical infusion devices. IC Role / Device Role / Timing Role: Safety-critical nonvolatile storage with traceable write endurance and retention validation. Use Value: Meets IEC 62304 requirements for configurable parameters with documented 1M-cycle reliability and 100-year data integrity. |
Use Scenario: Storing tariff schedules, metering constants, and communication keys in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Tamper-resistant parameter vault accessed via secure serial interface during firmware initialization. Use Value: Supports remote utility updates while preserving regulatory-certified calibration data across power failures. |
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 (vs. 2K-bit 3-wire); 5V-only supply (4.5–5.5V); faster 20 MHz clock | Requires SPI host peripheral instead of generic GPIO bit-banging; higher density but incompatible protocol stack | Select when migrating to SPI-based platforms and needing larger capacity; not drop-in compatible |
| STK12C68-55I | NVSRAM (nonvolatile SRAM) with 8K × 8 organization; parallel interface; automatic store-on-power-loss | Enables byte-level random access and microsecond write latency vs. EEPROM's 10 ms page write | Choose for real-time logging or frequent parameter updates where EEPROM write latency is unacceptable |
Compared with M95256-WMN6TP and STK12C68-55I, the AT93C56-10PC offers minimal pin count, ultra-low standby current, and hardware-selectable organization - making it optimal for cost-sensitive, space-constrained 3-wire designs requiring proven 100-year retention without SPI overhead or NVSRAM cost premium.
Availability
AT93C56-10PC is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical device calibration storage, and smart meter parameter retention requiring stable component supply across multi-year production cycles.
Supply support for AT93C56-10PC 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 AT93C56-10PC belongs to Microchip's legacy serial EEPROM product line, designed specifically for low-pin-count, low-power embedded systems requiring simple, reliable, and long-life nonvolatile storage in space-constrained layouts.
FAQ
What is the maximum clock frequency supported by the AT93C56-10PC?
The AT93C56-10PC supports up to 2 MHz SK clock frequency when operated at VCC = 4.5V to 5.5V. At 2.7V to 5.5V, the maximum clock rate is 1 MHz. This specification is defined in the AC Characteristics table and verified across the commercial temperature range (0°C to 70°C). The AT93C56-10PC must be clocked within these limits to ensure reliable instruction decoding and data transfer integrity.
How does the ORG pin affect memory organization in the AT93C56-10PC?
In the AT93C56-10PC, the ORG pin selects between two internal configurations: when tied to VCC, it enables 128-word × 16-bit organization; when tied to GND, it enables 256-word × 8-bit organization. If left unconnected, an internal ~1 MΩ pull-up selects the 128 × 16 mode. This hardware-selectable layout allows flexible data-width matching without firmware changes - a key feature of the AT93C56-10PC.
Does the AT93C56-10PC require an external erase cycle before writing?
No, the AT93C56-10PC does not require a separate erase cycle before writing. Each WRITE instruction automatically erases the target location prior to programming, and the entire operation is self-timed (≤10 ms). Erase functionality is embedded in the WRITE command - the standalone ERASE instruction is optional and used only for selective location clearing. This behavior is intrinsic to the AT93C56-10PC's architecture.
What is the guaranteed data retention period for the AT93C56-10PC?
The AT93C56-10PC guarantees 100 years of data retention under normal operating conditions (TA ≤ 85°C, VCC ≥ 2.7V). This value is characterized and specified in the Absolute Maximum Ratings and DC Characteristics sections of the official datasheet. Data retention is maintained even after 1 million write cycles, confirming long-term reliability for the AT93C56-10PC in mission-critical applications.
Can the AT93C56-10PC operate at 1.8V?
No, the AT93C56-10PC is not rated for 1.8V operation. Per the ordering information and DC characteristics, the AT93C56-10PC variant supports only 2.7V to 5.5V and 4.5V to 5.5V supply ranges. The 1.8V option exists only for the AT93C46-10xx-1.8 series - not for AT93C56-10PC. Using 1.8V on the AT93C56-10PC may result in undefined behavior or failure to meet timing specifications.
AT93C56-10PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT93C56-10PC FAQ
1.How can I place an order for AT93C56-10PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT93C56-10PC 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 AT93C56-10PC reliable?
The price and inventory of AT93C56-10PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT93C56-10PC is usually 5 days.
3.What payment methods are accepted for AT93C56-10PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT93C56-10PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT93C56-10PC?
AT93C56-10PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT93C56-10PC 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 AT93C56-10PC?
For technical support, including AT93C56-10PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT93C56-10PC requirements.
6.How does Aetrix verify that AT93C56-10PC is sourced from the original manufacturer or authorized distributors?
All AT93C56-10PC 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 AT93C56-10PC meets industry standards.
7.What is the process for return or replacement of AT93C56-10PC?
All AT93C56-10PC units undergo pre-shipment inspection (PSI). If there is an issue with AT93C56-10PC, 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 AT93C56-10PC part is unused and in its original packaging.
Return procedure for AT93C56-10PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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