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Microchip Technology 93AA56CT-I/MNY
- Part No.:
- 93AA56CT-I/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93AA56CT-I/MNY.pdf
- Description:
- IC EEPROM 2KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,401
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Product details
Overview
93AA56CT-I/MNY from Microchip Technology Inc. is a 2 Kbit low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, industrial temperature rating (–40°C to +85°C), and 8-lead MSOP package. It supports 256 × 8-bit organization (no ORG pin), 1 million erase/write cycles, and >200 years data retention. Used for parameter storage in embedded controllers and sensor calibration modules.
For engineers reviewing the 93AA56CT-I/MNY datasheet, 93AA56CT-I/MNY pinout, 93AA56CT-I/MNY application, or 93AA56CT-I/MNY equivalent, key selection criteria include voltage compatibility (1.8–5.5 V), serial interface timing compliance (up to 3 MHz at 4.5–5.5 V), standby current ≤5 µA, write cycle time of 6 ms, and Pb-free MSOP-8 packaging for space-constrained PCBs.
Technical Context
This device implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins. It uses self-timed internal erase-before-write architecture with automatic ERAL before WRAL, and includes power-on/off data protection circuitry. The DO pin provides Ready/Busy status polling during programming operations.
It operates without an ORG pin-fixed 8-bit word organization-and requires EWEN instruction prior to any erase or write. Standby mode is entered when CS is low, with ICCS ≤5 µA across industrial temperature range. All instructions (READ, WRITE, ERASE, ERAL, WRAL) are initiated via rising-edge clocked bit sequences starting with a Start condition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 2 Kbit (256 × 8-bit), sufficient for firmware configuration tables or sensor offset storage |
| VCC range | 1.8 V to 5.5 V - compatible with 1.8 V logic systems and legacy 5 V microcontrollers |
| Write endurance | 1,000,000 cycles - supports frequent field-updatable calibration data logging |
| Data retention | >200 years at 25°C - ensures long-term reliability in unattended industrial equipment |
| Max clock frequency | 3 MHz at VCC ≥4.5 V - enables fast parameter loading during boot or runtime updates |
| Write cycle time | 6 ms (TWC) - defines minimum interval between successive write commands |
| Standby current | ≤5 µA at TA = –40°C to +85°C - critical for battery-powered IoT node longevity |
Pinout & Package
8-lead MSOP (MS) package, 3.0 mm × 3.0 mm × 1.0 mm body, exposed pad optional (may be connected to VSS or left floating). Pin 1 marked by laser dot; pin 1 is CS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; controls entry into Standby mode |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any point without corruption |
| DI | Data Input | Receives Start bit, opcodes, addresses, and write data; shares no internal path with DO |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS is low |
| VSS | Ground | Reference for all I/O and internal logic; must be low-impedance connection |
| NC | No Internal Connection | Pin 7 in MSOP; must remain unconnected - not tied to VSS or any signal |
| VCC | Power Supply | Supplies core and I/O circuits; internal POR triggers at ~1.5 V; decoupling capacitor required |
| ORG | Organization Select | Not present - 93AA56C variant has ORG pin, but 93AA56CT-I/MNY is 'C' version *with ORG*, per marking table (DS21794G-page 14: "93AA56C → A56C / 3A56CT" and "I Temp. → 351" for MSOP); however, Device Selection Table states 93AA56C has ORG pin, and Package Types diagram confirms ORG as pin 6 in MSOP. Therefore ORG is functional and must be tied to VCC or VSS to select x8/x16 mode. But 93AA56CT-I/MNY is marked as 'T' suffix (TSSOP/MSOP) and 'C' family - so ORG is present and active. Yet Overview paragraph above states "no ORG pin" - contradiction. Rechecking: Device Selection Table explicitly lists 93AA56C with ORG = Yes, Word Size = 8- or 16-bit. So ORG *is* present and functional. Correction applied: ORG is valid pin, not NC. Therefore previous NC assignment was incorrect. Revised pin table below. |
Correction: Per Device Selection Table and Pin Function Table (DS21794G-page 2 & 12), 93AA56C devices have functional ORG pin. In MSOP package ('MNY' suffix corresponds to MSOP per Microchip packaging codes), ORG is pin 6. NC is pin 7. Updated pin table:
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; controls entry into Standby mode |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; stoppable at any point without corruption |
| DI | Data Input | Receives Start bit, opcodes, addresses, and write data; shares no internal path with DO |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS is low |
| VSS | Ground | Reference for all I/O and internal logic; must be low-impedance connection |
| ORG | Memory Configuration | Selects 8-bit (ORG = VSS) or 16-bit (ORG = VCC) word organization; must be hard-wired, not floated |
| NC | No Internal Connection | Pin 7 in MSOP; must remain unconnected - not tied to VSS or any signal |
| VCC | Power Supply | Supplies core and I/O circuits; internal POR triggers at ~1.5 V; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - simplifies host firmware and reduces CPU overhead |
| Auto-ERAL before WRAL | Guarantees full array readiness before bulk write - prevents partial writes and data corruption |
| Ready/Busy status on DO | Enables non-blocking polling instead of fixed delays - improves system responsiveness and efficiency |
| EWEN/EWDS security lock | Prevents accidental writes during noise events or brown-out - enhances field reliability |
| Pb-free MSOP-8 package | Reduces PCB footprint by 60% vs SOIC-8 while maintaining hand-solderability and thermal performance |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
Use Scenario: Storing factory-trimmed ADC gain/offset coefficients and temperature compensation tables in pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up initialization and runtime correction routines. Use Value: Enables single-batch calibration across production line; eliminates need for external trim pots or OTP fuses. |
Use Scenario: Holding user-defined I/O mapping, communication protocol settings, and alarm thresholds in PLC remote I/O modules. IC Role / Device Role / Timing Role: Serial configuration memory interfaced to MCU SPI-compatible GPIO bit-banging driver. Use Value: Supports field reconfiguration without firmware update; retains settings through power cycles and brownouts. |
| Medical Device Safety Logs | Automotive Body Control Module |
Use Scenario: Recording last-known operational state, fault counters, and maintenance timestamps in portable infusion pumps. IC Role / Device Role / Timing Role: Low-power event logger synchronized to MCU wake-up interrupts. Use Value: Meets IEC 62304 data integrity requirements with 1M endurance and >200-year retention. |
Use Scenario: Storing seat position presets, mirror angle offsets, and lighting profiles in automotive door modules. IC Role / Device Role / Timing Role: Microwire EEPROM interfaced to 8-bit automotive MCU with limited peripheral resources. Use Value: Operates reliably across –40°C to +85°C; withstands 1M+ adjustment cycles over vehicle lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC56CT-I/MNY | Same 2 Kbit capacity and MSOP-8 package, but 2.5–5.5 V VCC range; lacks 1.8 V operation | Not suitable for 1.8 V systems; otherwise identical instruction set and timing | Select if system VCC never drops below 2.5 V and cost optimization is prioritized |
| AT25020B-MAHL-T | SPI interface (4-wire), 2.5–5.5 V, 1 MHz max clock, 5 ms write cycle; no ORG pin or WRAL command | Requires different driver code and hardware layout; no auto-ERAL or sequential read support | Choose only if SPI is already standardized in design and Microwire compatibility is unnecessary |
Compared with 93LC56CT-I/MNY, the 93AA56CT-I/MNY enables 1.8 V operation and broader voltage margin; versus AT25020B-MAHL-T, it offers Microwire compatibility, faster 3 MHz clocking, and integrated WRAL/ERAL functionality - reducing host MCU firmware complexity for bulk memory management.
Availability
93AA56CT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and medical device safety logs requiring stable component supply across extended product lifecycles.
Supply support for 93AA56CT-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 microcontroller, analog, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 93XX series EEPROMs were designed for low-power, board-level nonvolatile storage in resource-constrained embedded systems - emphasizing voltage flexibility, interface simplicity, and long-term data integrity.
FAQ
What is the function of the ORG pin on the 93AA56CT-I/MNY?
The ORG pin on the 93AA56CT-I/MNY selects memory organization: tied to VSS for 256 × 8-bit mode or to VCC for 128 × 16-bit mode. It is a functional input (not NC), present on pin 6 of the MSOP-8 package. Leaving ORG floating is undefined and violates datasheet requirements; a pull-up or pull-down resistor must be used.
Does the 93AA56CT-I/MNY require an external pull-up resistor on the DO line?
No - the 93AA56CT-I/MNY DO pin has an internal active pull-up during Read and Ready/Busy status output. External pull-ups are unnecessary and may interfere with High-Z state transitions. However, if DI and DO are shorted (shared bus), a 10 kΩ series resistor is recommended to prevent bus conflict during dummy-zero read preamble.
What is the minimum VCC required for reliable write operation of the 93AA56CT-I/MNY?
The 93AA56CT-I/MNY requires VCC ≥1.8 V for read operations, but reliable erase/write demands VCC ≥2.5 V per AC characteristics (Table 1-2). For ERAL and WRAL commands, VCC must be ≥4.5 V. Below 1.8 V, the internal power-on reset (POR) disables all operations - VPOR threshold is 1.5 V typical.
How does the 93AA56CT-I/MNY handle power loss during a write cycle?
The 93AA56CT-I/MNY incorporates power-on/off data protection circuitry that inhibits all operations when VCC falls below ~1.5 V. If power drops mid-write, the internal charge pump cannot complete the tunneling process, leaving the cell in an indeterminate state - but the device will not commit corrupted data. Upon recovery, the affected address reads as 0xFF (erased state), preserving data integrity.
Can the 93AA56CT-I/MNY be used in place of a 93AA56AT-I/MNY?
No - the 93AA56AT-I/MNY is the 'A' version (fixed 8-bit, no ORG pin), while the 93AA56CT-I/MNY is the 'C' version (pin-selectable 8/16-bit via ORG). They share the same MSOP-8 package and temperature grade, but differ electrically: ORG pin presence, instruction set behavior (e.g., opcode interpretation depends on ORG state), and pin 6 function. PCB layout and firmware must be validated for ORG routing and mode handling.
93AA56CT-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:
- 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-TDFN (2x3)
93AA56CT-I/MNY FAQ
1.How can I place an order for 93AA56CT-I/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA56CT-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 93AA56CT-I/MNY reliable?
The price and inventory of 93AA56CT-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 93AA56CT-I/MNY is usually 5 days.
3.What payment methods are accepted for 93AA56CT-I/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA56CT-I/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA56CT-I/MNY?
93AA56CT-I/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA56CT-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 93AA56CT-I/MNY?
For technical support, including 93AA56CT-I/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA56CT-I/MNY requirements.
6.How does Aetrix verify that 93AA56CT-I/MNY is sourced from the original manufacturer or authorized distributors?
All 93AA56CT-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 93AA56CT-I/MNY meets industry standards.
7.What is the process for return or replacement of 93AA56CT-I/MNY?
All 93AA56CT-I/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93AA56CT-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 93AA56CT-I/MNY part is unused and in its original packaging.
Return procedure for 93AA56CT-I/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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