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Microchip Technology 93C56CT-I/MNY
- Part No.:
- 93C56CT-I/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93C56CT-I/MNY.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,242
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Product details
Overview
93C56CT-I/MNY from Microchip Technology Inc. is a 2 Kbit (256 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 4.5–5.5 V supply range, industrial temperature grade (–40°C to +85°C), and 1 million erase/write cycles. It operates in dedicated 8-bit organization (no ORG pin functionality), supports sequential read, automatic erase-before-write, and Ready/Busy status via DO pin - used for firmware parameter storage in embedded microcontroller systems.
For engineers reviewing the 93C56CT-I/MNY datasheet, 93C56CT-I/MNY pinout, 93C56CT-I/MNY application, or 93C56CT-I/MNY equivalent, key selection considerations include its fixed 8-bit word size, 2 ms typical write cycle time, VCC ≥ 4.5 V requirement for ERAL/WRAL operations, and compatibility with legacy Microwire controllers in space-constrained industrial control modules.
Technical Context
The 93C56CT-I/MNY implements a synchronous serial interface with CS, CLK, and DI/DO pins, using rising-edge clocking for instruction/address/data transfer. Its internal logic enforces power-on data protection by inhibiting all operations below 3.8 V VCC and requires explicit EWEN command before any erase or write sequence.
Unlike C-variant parts, this A-version device lacks an ORG pin (treated as NC), fixing memory organization to 256 × 8-bit. Write cycles are self-timed and initiated by the rising edge of CLK on the final data bit, with DO asserting Ready/Busy status only when CS is reasserted after ≥250 ns low time (TCSL).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 × 8-bit) - fixed word size; no ORG pin configuration required. |
| VCC Range | 4.5 V to 5.5 V - operation disabled below 3.8 V; mandates stable 5 V rail in host system. |
| Write Cycle Time | 2 ms typical - enables fast parameter updates without blocking MCU execution for extended periods. |
| Endurance | 1,000,000 erase/write cycles - supports frequent calibration or logging in field-deployed equipment. |
| Data Retention | 200 years at 25°C - ensures long-term reliability for unattended industrial installations. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy PIC® MCU peripherals and simple GPIO bit-banging. |
| Temperature Range | –40°C to +85°C (Industrial) - qualified for use in motor drives, PLC I/O modules, and HVAC controllers. |
Pinout & Package
93C56CT-I/MNY is housed in an 8-lead MSOP (MS) package (3.0 mm × 3.0 mm × 1.0 mm), Pb-free matte tin finish, with exposed pad optionally connected to VSS. Pin functions are validated per DS21794G-page 12.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal state. |
| CLK | Serial Clock | Rising-edge synchronized timing; stops/resumes freely; initiates write cycle on final rising edge. |
| DI | Data Input | Accepts Start bit, opcode, address, and data; high-impedance when not selected. |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge. |
| VSS | Ground | Reference for all I/O and internal logic; connects to exposed pad in MSOP for thermal relief. |
| NC | No Internal Connection | Pin 7 - unused; must be left floating or tied to VSS per layout best practice. |
| VCC | Power Supply | 4.5–5.5 V input; internal POR circuit triggers at ~3.8 V to prevent corruption during brownout. |
| ORG | Organization Select | No internal connection (NC) - confirms fixed 8-bit mode; not bonded in A-version die. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates external timing control; 2 ms typical cycle frees MCU resources during nonvolatile updates. |
| Automatic ERAL before WRAL | Ensures full array readiness before bulk write - prevents partial writes without separate erase command. |
| Power-On/Off Data Protection | Hardware lockout below 3.8 V VCC prevents inadvertent writes during power ramp-up/down sequences. |
| Ready/Busy via DO pin | Enables polling-based flow control instead of fixed delays - improves system responsiveness and determinism. |
| Sequential Read Mode | Allows continuous address increment with single CS assertion - reduces transaction overhead for block reads. |
Applications
| Motor Control Parameter Storage | Industrial Sensor Calibration |
|---|---|
Use Scenario: Storing PID coefficients, current limits, and fault thresholds in brushless DC motor drives. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime reconfiguration. Use Value: Enables field-upgradable tuning without firmware reflashing; retains settings across 10+ year product lifecycle. | Use Scenario: Holding factory-calibrated offset/gain values for analog temperature and pressure sensors. IC Role / Device Role / Timing Role: Static lookup table referenced at sensor initialization and periodic self-test. Use Value: Achieves ±0.1% measurement accuracy over –40°C to +85°C without host MCU compensation routines. |
| PLC I/O Module Configuration | Smart Energy Meter Firmware Settings |
Use Scenario: Saving channel enable/disable states, scaling factors, and alarm thresholds in modular programmable logic controllers. IC Role / Device Role / Timing Role: Persistent configuration store mapped to CANopen or Modbus register space. Use Value: Survives 100,000+ hot-swap cycles and maintains integrity during 20 ms power interruptions. | Use Scenario: Securing tariff schedules, demand-response flags, and metering constants in ANSI C12.22-compliant utility meters. IC Role / Device Role / Timing Role: Tamper-resistant parameter vault accessed only during secure bootloader update. Use Value: Meets ANSI C12.10 Class 0.2 anti-tamper requirements with 200-year data retention at 60°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-I/MNY | 128 × 16-bit organization; same 2.5–5.5 V VCC range; includes ORG pin (functional) | Requires ORG pin tie-off and 16-bit data path; better suited for 16-bit MCU interfaces | Select if host uses 16-bit word transfers and needs wider data bus efficiency |
| AT25020B-MAHL-T | SPI interface (4-wire), 2 Kbit (256 × 8), 1.8–5.5 V, 5 MHz max clock, no ERAL/WRAL commands | Lacks auto-erase-all and write-all primitives; requires software-managed sector erase | Choose for SPI-native designs needing higher clock speed and broader voltage flexibility |
Compared with 93LC56BT-I/MNY and AT25020B-MAHL-T, the 93C56CT-I/MNY offers deterministic 2 ms write timing and hardware-accelerated bulk operations (ERAL/WRAL) critical for time-sensitive industrial firmware updates, but requires strict 4.5–5.5 V compliance and Microwire controller support.
Availability
93C56CT-I/MNY is available at Aetrix Electronics and suitable for motor control parameter storage, industrial sensor calibration, and PLC I/O module configuration requiring stable component supply across extended production lifecycles.
Supply support for 93C56CT-I/MNY 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93Cxx series was designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal pin count and legacy interface compatibility - especially in industrial automation and automotive subsystems.
FAQ
What is the function of the ORG pin on the 93C56CT-I/MNY?
The ORG pin on the 93C56CT-I/MNY is marked as NC (No internal connection) in the datasheet and pin function table. As an 'A'-version device, it implements a fixed 256 × 8-bit organization and does not support word-size selection. The ORG pin is not bonded and must be left unconnected or tied to VSS per PCB layout guidelines.
Does the 93C56CT-I/MNY support 16-bit memory access?
No, the 93C56CT-I/MNY does not support 16-bit memory access. It is an 'A'-version part with fixed 256 × 8-bit organization. Only 'B' and 'C' variants (e.g., 93C56B or 93C56C) provide 128 × 16-bit operation, and the 93C56CT-I/MNY's ORG pin is NC, confirming its exclusive 8-bit interface.
What is the minimum VCC required for ERAL and WRAL operations on the 93C56CT-I/MNY?
The 93C56CT-I/MNY requires VCC ≥ 4.5 V for proper execution of ERAL (Erase All) and WRAL (Write All) commands. Below this threshold, these instructions will not initiate, and the device remains in standby or rejects the command - a hardware-level safeguard documented in DS21794G-page 8 and page 11.
How does the Ready/Busy status work on the 93C56CT-I/MNY DO pin?
The DO pin of the 93C56CT-I/MNY outputs Ready/Busy status only when CS is brought high after being low for ≥250 ns (TCSL). During active erase/write, DO = low indicates ongoing operation; DO = high signals completion. If CS remains low throughout the cycle, DO stays in High-Z and provides no status feedback.
Is the 93C56CT-I/MNY compatible with standard SPI interfaces?
No, the 93C56CT-I/MNY is not SPI-compatible. It uses a Microwire-compatible 3-wire interface (CS/CLK/DI/DO) with specific timing, opcodes, and dual-role DO pin behavior. SPI hosts require protocol translation or bit-banged GPIO emulation - unlike true SPI EEPROMs such as the AT25xxx family.
93C56CT-I/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 2ms
- 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-TDFN (2x3)
93C56CT-I/MNY FAQ
1.How can I place an order for 93C56CT-I/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C56CT-I/MNY 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 93C56CT-I/MNY reliable?
The price and inventory of 93C56CT-I/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C56CT-I/MNY is usually 5 days.
3.What payment methods are accepted for 93C56CT-I/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56CT-I/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C56CT-I/MNY?
93C56CT-I/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C56CT-I/MNY 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 93C56CT-I/MNY?
For technical support, including 93C56CT-I/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56CT-I/MNY requirements.
6.How does Aetrix verify that 93C56CT-I/MNY is sourced from the original manufacturer or authorized distributors?
All 93C56CT-I/MNY 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 93C56CT-I/MNY meets industry standards.
7.What is the process for return or replacement of 93C56CT-I/MNY?
All 93C56CT-I/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93C56CT-I/MNY, 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 93C56CT-I/MNY part is unused and in its original packaging.
Return procedure for 93C56CT-I/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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