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Microchip Technology 93C56CT-E/MNY
- Part No.:
- 93C56CT-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93C56CT-E/MNY.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,554
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Product details
Overview
93C56CT-E/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, and industrial-temperature operation (–40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and Ready/Busy status signaling via DO pin - deployed in embedded control firmware storage and calibration parameter retention.
For engineers reviewing the 93C56CT-E/MNY datasheet, 93C56CT-E/MNY pinout, 93C56CT-E/MNY application, or 93C56CT-E/MNY equivalent, key selection criteria include its fixed 8-bit organization (no ORG pin), 2 ms program cycle time, 1 million endurance cycles, 200-year data retention, and compatibility with legacy Microwire-based microcontroller peripherals.
Technical Context
This device implements a synchronous serial interface using CS, CLK, and DI/DO lines with start-bit detection and opcode-driven command execution. Memory access follows strict timing windows (e.g., TCSL ≥250 ns, TWC = 2 ms for 93C versions), and all programming operations require prior EWEN enable followed by automatic erase-before-write.
Power management includes built-in VCC voltage detect (VPOR = 3.8 V), standby current ≤5 µA, and hardware-level write protection via EWDS/EWEN commands. The absence of ORG pin confirms dedicated x8 organization - eliminating configuration dependency and simplifying host-side driver logic versus C-variant parts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit) - fixed x8 organization; no ORG pin required. |
| VCC range | 4.5 V to 5.5 V - supports standard 5 V systems; VPOR threshold at 3.8 V prevents corruption during brown-out. |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates in calibration or logging applications. |
| Data retention | 200 years at 25°C - ensures long-term reliability in unattended equipment without battery backup. |
| Program cycle time | 2 ms - faster than AA/LC variants (6 ms); reduces firmware update latency in real-time systems. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy PIC® MCU peripherals and simple GPIO bit-banging. |
| Temperature grade | Industrial (–40°C to +85°C) - qualified for factory automation, industrial HMI, and motor control environments. |
Pinout & Package
93C56CT-E/MNY is packaged in an 8-lead TSSOP (ST package code), Pb-free matte tin finish, with exposed pad optional per Microchip spec. Pin 1 is CS; pin 2 is CLK; pin 3 is DI; pin 4 is DO; pin 5 is VSS; pin 6 is NC (no internal connection); pin 7 is ORG (NC on A/B variants); pin 8 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge for 93C devices. |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stops freely during transmission. |
| DI | Data Input | Receives start bit, instruction opcodes, address bits, and write data; shares bus with DO only with external series resistor. |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z on CS fall; requires TCSL ≥250 ns before status polling. |
| VSS | Ground | Reference for all I/O and internal logic; must be low-impedance connection to minimize noise coupling. |
| NC | No Internal Connection | Pin 6 is unconnected internally; may be left floating or tied to GND for mechanical stability. |
| ORG | Organization Select | NC on 93C56A/B - confirms fixed x8 memory mapping; eliminates configuration uncertainty in host firmware. |
| VCC | Power Supply | 4.5–5.5 V input; internal POR circuit holds device in reset until VCC ≥3.8 V, preventing spurious writes. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - host only monitors DO for Ready/Busy; 2 ms typical cycle for 93C56T. |
| Automatic ERAL before WRAL | Ensures full-array write integrity without separate erase command - simplifies firmware and reduces risk of partial writes. |
| Power-on/off data protection | Hardware-enforced lockout below 3.8 V - prevents corruption during power ramp-up/down or brown-out events. |
| Erase/Write Enable/Disable (EWEN/EWDS) | Explicit software-controlled write gating - allows safe default-disabled state after power-up and post-write lockdown. |
| Ready/Busy status on DO | Enables non-blocking polling instead of fixed delays - improves system responsiveness and reduces CPU overhead. |
Applications
| Industrial Sensor Calibration | Embedded Controller Firmware Storage |
|---|---|
Use Scenario: Storing temperature-compensation coefficients and sensor offset values in HVAC controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent updates and guaranteed retention over 10+ years in unpowered units. Use Value: Eliminates need for battery-backed SRAM; leverages 200-year data retention and 1M-cycle endurance for field recalibration. | Use Scenario: Holding bootloader configuration flags and secure boot keys in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Secure, tamper-resistant configuration register accessed at power-on before main firmware executes. Use Value: Hardware-level write protection (EWDS) and VCC monitoring prevent unauthorized or accidental modification during runtime. |
| Motor Drive Parameter Tables | Medical Device Usage Logs |
Use Scenario: Storing torque/speed lookup tables and fault history in brushless DC motor drives. IC Role / Device Role / Timing Role: High-reliability data logger with deterministic 2 ms write latency and error-free reads under EMI-rich motor environments. Use Value: Microwire interface immunity to noise, combined with DO status polling, ensures robust communication near high-current switching stages. | Use Scenario: Recording usage hours, calibration timestamps, and diagnostic events in portable infusion pumps. IC Role / Device Role / Timing Role: Low-power, long-life event counter and audit trail storage operating from coin-cell or energy-harvesting sources. Use Value: Standby current ≤5 µA and 4.5 V minimum VCC allow direct connection to regulated 5 V rails without additional LDOs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56BT-E/MS | Same 2 Kbit x16 organization, but 2.5–5.5 V VCC range and 6 ms write time; ORG pin present (tied high). | Supports wider voltage range and 16-bit interface - suitable for newer 3.3 V microcontrollers with native 16-bit SPI peripherals. | Select when migrating to lower-voltage systems or requiring x16 word access; verify host timing compliance with longer TWC. |
| 93AA56AT-I/MNY | 1.8–5.5 V operation, same x8 organization, but 6 ms write time and 1.5 V VPOR; industrial temp only. | Enables single-supply designs down to 1.8 V - ideal for battery-powered IoT edge nodes with ultra-low active current. | Choose for energy-constrained applications needing extended VCC range; accept slower write performance and re-validate power-fail timing. |
Compared with 93LC56BT-E/MS and 93AA56AT-I/MNY, the 93C56CT-E/MNY delivers fastest write speed (2 ms) and highest VCC noise margin (3.8 V VPOR) at the cost of narrowest supply range - making it optimal for legacy 5 V industrial systems where update latency and brown-out resilience are critical.
Availability
93C56CT-E/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller firmware storage, and motor drive parameter tables requiring stable component supply across multi-year production cycles.
Supply support for 93C56CT-E/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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93Cxx EEPROM product line targets cost-sensitive, high-reliability nonvolatile storage in industrial, automotive, and consumer applications - emphasizing simplicity, long-term data integrity, and drop-in compatibility with legacy Microwire interfaces.
FAQ
What is the memory organization of the 93C56CT-E/MNY?
The 93C56CT-E/MNY has a fixed 256 × 8-bit (x8) organization. Unlike C-variant parts, it lacks an ORG pin - confirming dedicated 8-bit interface operation without external configuration. This eliminates ambiguity in host firmware and ensures consistent byte-aligned addressing across all read/write operations.
Does the 93C56CT-E/MNY require an external pull-up resistor on the DO pin?
No, the 93C56CT-E/MNY does not require an external pull-up on DO. The DO pin actively drives high/low during read or Ready/Busy status reporting and enters High-Z when deselected. However, if DI and DO are shorted for 2-wire bus implementation, a series resistor (e.g., 10 kΩ) is mandatory to prevent bus conflict during dummy-zero read preamble.
What is the minimum VCC voltage required to prevent unintended writes in the 93C56CT-E/MNY?
The 93C56CT-E/MNY incorporates a voltage detect circuit with VPOR = 3.8 V (typical). Below this threshold, all write/erase functions are hardware-disabled - ensuring data integrity during power-up, power-down, or brown-out conditions. This is higher than AA/LC variants (1.5 V), reflecting its 4.5–5.5 V design envelope.
How does the 93C56CT-E/MNY handle write completion signaling?
The 93C56CT-E/MNY signals write completion via the DO pin: logical '0' indicates ongoing erase/write, and logical '1' indicates readiness. This Ready/Busy status is valid only after CS is brought high for ≥250 ns (TCSL) post-command initiation. Polling DO avoids fixed-delay waits and adapts to actual process variation.
Is the 93C56CT-E/MNY compatible with standard SPI interfaces?
The 93C56CT-E/MNY uses a Microwire-compatible 3-wire interface (CS/CLK/DI/DO), not standard SPI. It lacks MOSI/MISO separation and relies on start-bit detection and opcode-based command framing. While bit-bangable on GPIO, it is not electrically or protocol-compatible with hardware SPI peripherals without custom driver adaptation.
93C56CT-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
93C56CT-E/MNY FAQ
1.How can I place an order for 93C56CT-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C56CT-E/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-E/MNY reliable?
The price and inventory of 93C56CT-E/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-E/MNY is usually 5 days.
3.What payment methods are accepted for 93C56CT-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C56CT-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C56CT-E/MNY?
93C56CT-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C56CT-E/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-E/MNY?
For technical support, including 93C56CT-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C56CT-E/MNY requirements.
6.How does Aetrix verify that 93C56CT-E/MNY is sourced from the original manufacturer or authorized distributors?
All 93C56CT-E/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-E/MNY meets industry standards.
7.What is the process for return or replacement of 93C56CT-E/MNY?
All 93C56CT-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93C56CT-E/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-E/MNY part is unused and in its original packaging.
Return procedure for 93C56CT-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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