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Microchip Technology 93AA56CT-I/MC
- Part No.:
- 93AA56CT-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
93AA56CT-I/MC.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,744
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Product details
Overview
93AA56CT-I/MC from Microchip Technology is a 2 Kbit low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, and configurable 8-/16-bit word organization via ORG pin. It delivers 1 million erase/write cycles, >200-year data retention, and industrial temperature operation (–40°C to +85°C) in an 8-lead 2×3 DFN package. Used for parameter storage in embedded controllers and sensor calibration.
For engineers reviewing the 93AA56CT-I/MC datasheet, 93AA56CT-I/MC pinout, 93AA56CT-I/MC application, or 93AA56CT-I/MC equivalent, key selection criteria include VCC operating range (1.8–5.5 V), ORG-configurable x8/x16 memory organization, self-timed write/erase timing (6 ms), Ready/Busy status signaling on DO, and Pb-free 2×3 DFN (MC) package compatibility with space-constrained PCB layouts.
Technical Context
The 93AA56CT-I/MC implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, where instruction execution begins on detection of a Start bit (CS high and DI high on CLK rising edge). Its internal architecture includes address decoder, mode decode logic, and output buffer enabling sequential read and auto-erase-before-write functionality.
Memory organization is dynamically selected by the ORG pin: logic high enables 128 × 16-bit (x16) mode; logic low enables 256 × 8-bit (x8) mode. The device powers up in EWDS (Erase/Write Disable) state, requiring explicit EWEN command before any erase or write operation - a hardware-level protection mechanism against accidental overwrites.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit or 128 × 16-bit, selectable via ORG pin) |
| VCC range | 1.8 V to 5.5 V - supports single-supply operation across battery-powered and 3.3 V/5 V systems |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in firmware update or logging applications |
| Data retention | >200 years at 25°C - guarantees nonvolatile storage integrity over product lifetime without refresh |
| Write cycle time | 6 ms typical (TWC) - defines minimum interval between successive write commands |
| Interface | 3-wire Microwire-compatible (CS, CLK, DI/DO) - reduces pin count and simplifies host MCU integration |
| Operating temp | –40°C to +85°C (Industrial grade) - validated for use in automotive ECUs and industrial controls |
Pinout & Package
Package: 8-lead 2×3 mm DFN (exposed pad, MC suffix), RoHS-compliant matte tin finish. Pin 1 marked by laser dot; exposed pad may be connected to VSS or left floating per layout requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must remain low ≥250 ns between instructions; deselects device into standby mode |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| DI | Data Input | Receives Start bit, opcodes, addresses, and write data; shares bidirectional bus with DO when externally wired |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS low or after status polling |
| VSS | Ground | Reference for all I/O and power; connects to exposed pad in DFN for thermal and EMI performance |
| ORG | Organization select | Logic high → 128 × 16-bit; logic low → 256 × 8-bit; must be statically tied - no floating allowed |
| NC | No internal connection | Pin 7 is unconnected; no external tie required; may be left open or grounded per board design |
| VCC | Power supply | 1.8–5.5 V input; internal POR circuit triggers at ~1.5 V; requires local 0.1 µF decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - host only waits for DO status or fixed 6 ms delay |
| Automatic ERAL before WRAL | WRAL command internally executes full-array erase prior to write, ensuring deterministic blank-state programming |
| Power-on/off data protection | Hardware lockout below ~1.5 V VCC prevents corruption during brown-out or power ramp conditions |
| Ready/Busy status on DO | Enables polling-based flow control without dedicated status lines - reduces MCU GPIO usage |
| Sequential read mode | Continuous clocking with CS held high automatically increments address and outputs next byte/word |
Applications
| Motor Control Firmware Storage | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing motor commutation tables and PID tuning parameters in BLDC driver modules. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed during boot and runtime reconfiguration. Use Value: Enables field-upgradable motor profiles without firmware reflashing; 1M endurance supports frequent recalibration in test benches. | Use Scenario: Retaining factory-trimmed offset/gain coefficients for MEMS accelerometers and temperature sensors. IC Role / Device Role / Timing Role: Parameter storage element interfaced via MCU's Microwire peripheral during sensor initialization. Use Value: Eliminates need for external trimming components; >200-year retention ensures calibration validity over product lifecycle. |
| Industrial PLC Configuration | Medical Device Setup Parameters |
Use Scenario: Holding user-defined I/O mapping, alarm thresholds, and communication settings in programmable logic controllers. IC Role / Device Role / Timing Role: System configuration register bank accessible over 3-wire bus during startup and HMI updates. Use Value: Supports secure, low-pin-count configuration storage with hardware write-protection (EWEN/EWDS) preventing unintended changes. | Use Scenario: Saving clinician-adjusted therapy parameters (e.g., infusion rate limits, alarm delays) in portable drug pumps. IC Role / Device Role / Timing Role: Certified-safe nonvolatile memory storing critical setup data with guaranteed integrity. Use Value: Meets IEC 62304 data retention requirements; industrial temp rating validates operation in clinical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA56CT-I/MS | Same electrical specs and pinout, but in 8-lead MSOP (3×3 mm) package - 0.5 mm pitch, no exposed pad | Preferred for hand-soldered prototypes or legacy MSOP footprints; lacks thermal pad for high-reliability power cycling | Select for ease of assembly or compatibility with existing MSOP layouts; verify thermal derating if operating near 85°C ambient |
| 93LC56CT-I/MC | VCC range 2.5–5.5 V (vs. 1.8–5.5 V); identical pinout, timing, and feature set otherwise | Suitable where system VCC never drops below 2.5 V - excludes single-cell Li-ion or energy-harvesting designs | Choose when higher minimum VCC is acceptable and lower quiescent current in 2.5 V operation is prioritized |
Compared with 93AA56CT-I/MS and 93LC56CT-I/MC, the 93AA56CT-I/MC uniquely supports 1.8 V operation and includes an exposed thermal pad in its DFN package - making it optimal for ultra-low-power and thermally constrained embedded systems requiring extended voltage flexibility.
Availability
93AA56CT-I/MC is available at Aetrix Electronics and suitable for motor control firmware storage, smart sensor calibration data, and industrial PLC configuration requiring stable component supply across automotive and industrial temperature ranges.
Supply support for 93AA56CT-I/MC 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 devices, and memory solutions, headquartered in Chandler, Arizona.
The 93XX56 family was designed specifically for cost-sensitive, low-power embedded systems requiring reliable, pin-efficient nonvolatile storage - emphasizing Microwire compatibility, wide VCC range, and robust data integrity features.
FAQ
What is the function of the ORG pin on the 93AA56CT-I/MC?
The ORG pin on the 93AA56CT-I/MC selects memory organization: logic high configures 128 × 16-bit (x16) mode; logic low configures 256 × 8-bit (x8) mode. It must be statically tied to VCC or VSS - floating is not permitted. This pin is functional only on 'C' variants like the 93AA56CT-I/MC; 'A' and 'B' versions omit ORG and fix organization permanently.
Does the 93AA56CT-I/MC require external pull-up resistors on its I/O lines?
The 93AA56CT-I/MC does not require external pull-ups on CS, CLK, or DI for basic operation, as these are driven actively by the host MCU. However, a 10 kΩ pull-down on CS is recommended per Microchip application guidance to prevent spurious activation during power-up. DO is actively driven during read/status and tri-stated otherwise - no pull-up needed unless shared with DI in bidirectional bus configurations.
How does the 93AA56CT-I/MC handle power loss during a write cycle?
The 93AA56CT-I/MC incorporates hardware power-loss protection: its internal POR circuit disables all operations when VCC falls below ~1.5 V, preventing partial writes or memory corruption. Combined with automatic erase-before-write and self-timed cycles, this ensures that any interrupted 93AA56CT-I/MC write either completes fully or leaves memory unchanged - no software recovery routine is required.
Can the 93AA56CT-I/MC be used in a 3.3 V system with a 1.8 V microcontroller?
Yes - the 93AA56CT-I/MC supports 1.8 V to 5.5 V operation and meets VIH/VIL thresholds across this range. When interfacing with a 1.8 V MCU, ensure the MCU's 1.8 V logic high (≥2.0 V or 0.7×VCC per datasheet) satisfies 93AA56CT-I/MC's VIH1 requirement. Level-shifting is unnecessary if both devices share the same VCC rail or if the MCU's outputs meet the 93AA56CT-I/MC's input voltage specifications.
What is the purpose of the exposed pad on the 93AA56CT-I/MC DFN package?
The exposed pad on the 93AA56CT-I/MC (MC package) serves dual thermal and electrical functions: it improves heat dissipation during extended write cycles and provides a low-inductance ground path. Microchip specifies it may be connected to VSS or left floating. For optimal EMI performance and thermal stability in high-density layouts, soldering the pad to a solid VSS plane is strongly recommended.
93AA56CT-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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:
- 6ms
- 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-DFN (2x3)
93AA56CT-I/MC FAQ
1.How can I place an order for 93AA56CT-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56CT-I/MC 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 93AA56CT-I/MC reliable?
The price and inventory of 93AA56CT-I/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA56CT-I/MC is usually 5 days.
3.What payment methods are accepted for 93AA56CT-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56CT-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56CT-I/MC?
93AA56CT-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56CT-I/MC 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 93AA56CT-I/MC?
For technical support, including 93AA56CT-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56CT-I/MC requirements.
6.How does Aetrix verify that 93AA56CT-I/MC is sourced from the original manufacturer or authorized distributors?
All 93AA56CT-I/MC 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 93AA56CT-I/MC meets industry standards.
7.What is the process for return or replacement of 93AA56CT-I/MC?
All 93AA56CT-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56CT-I/MC, 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 93AA56CT-I/MC part is unused and in its original packaging.
Return procedure for 93AA56CT-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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