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Microchip Technology 93AA46CT-I/MNY
- Part No.:
- 93AA46CT-I/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93AA46CT-I/MNY.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,158
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Product details
Overview
93AA46CT-I/MNY from Microchip Technology Inc. is a 1 Kbit low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 128 × 8-bit organization (ORG pin not used), industrial temperature range (–40°C to +85°C), and 1.8–5.5 V supply voltage. It provides nonvolatile storage for configuration data in microcontroller-based systems requiring robust data retention and low-power operation.
For engineers reviewing the 93AA46CT-I/MNY datasheet, 93AA46CT-I/MNY pinout, 93AA46CT-I/MNY application, or 93AA46CT-I/MNY equivalent, key selection criteria include its 8-bit serial interface timing compliance, self-timed erase/write cycles, Ready/Busy status signaling via DO, and support for sequential read and automatic ERAL/WRAL operations.
Technical Context
The 93AA46CT-I/MNY implements a synchronous 3-wire Microwire protocol with CS, CLK, and DI/DO lines. It uses a dedicated 8-bit memory organization (no ORG pin function), supports instruction-set-driven operations including READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS, and features internal auto-erase before write.
Power-on/off data protection is enforced by a VCC voltage detect circuit (VPOR = 1.5 V typical), and all programming operations require explicit Erase/Write Enable (EWEN) before execution. The device enters Standby mode when CS is low, drawing only 1 µA typical ICCS current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit organization) |
| VCC Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 2.5 V, 3.3 V, and 5 V logic systems |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - requires no additional level-shifting for standard MCU GPIOs |
| Write Cycle Time | 6 ms typical - defines minimum time between consecutive WRITE or ERASE commands |
| Data Retention | >200 years at +25°C - ensures long-term reliability for infrequently updated configuration storage |
| Endurance | 1,000,000 erase/write cycles - supports frequent field updates without wear-out concerns |
| Temp Range | Industrial: –40°C to +85°C - qualified for use in embedded control, industrial sensors, and automotive body electronics |
Pinout & Package
93AA46CT-I/MNY is packaged in an 8-lead 2×3 mm DFN (MNY = Microchip's designation for 2x3 DFN, Pb-free Matte Tin finish). The exposed pad is internally connected to VSS and may be left floating or soldered to ground for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; initiates self-timed write on falling edge for 93AA devices |
| 2: CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stopped clock allowed during transmission |
| 3: DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; shares bidirectional bus with DO in some designs (requires series resistor) |
| 4: DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS is low or after status polling |
| 5: NC | No Internal Connection | Unbonded pad; must be left unconnected or tied to VSS per layout best practice |
| 6: ORG | Organization Select | Not functional on 'A' version - permanently disabled; pin is NC and must be left unconnected |
| 7: VSS | Ground | Reference for all I/O and internal circuitry; connects to exposed pad on DFN package |
| 8: VCC | Power Supply | 1.8–5.5 V supply; includes internal POR detection at ~1.5 V to inhibit writes during power ramp |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates need for external timing control or software delays - write completion signaled via DO pin |
| Automatic ERAL before WRAL | Ensures full array erasure prior to bulk write, preventing partial-data corruption without host intervention |
| Power-on/off data protection | VCC voltage detect (1.5 V threshold) blocks all write operations until stable supply is confirmed |
| Ready/Busy status via DO | Enables efficient polling instead of fixed delays - reduces system latency and improves real-time responsiveness |
| Sequential read capability | Allows continuous address incrementing while CS remains high - simplifies firmware for block reads |
Applications
| Motor Control Configuration | Smart Sensor Calibration Data |
|---|---|
Use Scenario: Storing motor commutation tables, PID coefficients, and fault thresholds in BLDC motor drivers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed at startup and during field updates via MCU SPI-like GPIO bit-banging. Use Value: Enables field-upgradable motor parameters without requiring external flash or battery-backed RAM. | Use Scenario: Retaining factory-calibrated offset/gain values and temperature compensation coefficients in industrial pressure/temperature sensors. IC Role / Device Role / Timing Role: Low-power serial EEPROM interfaced to sensor ASIC or microcontroller during calibration and runtime readout. Use Value: Maintains accuracy over product lifetime (>200 years retention) with minimal power draw during sleep modes. |
| IoT Edge Device Identity | Industrial HMI Display Settings |
Use Scenario: Holding unique device identifiers (MAC, serial number), TLS certificate fragments, and secure boot keys in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage element accessed only during provisioning or firmware update. Use Value: Supports secure identity management with 1M endurance - withstands repeated OTA update cycles. | Use Scenario: Saving user-adjusted brightness, contrast, language, and alarm thresholds on panel-mounted HMIs in factory automation systems. IC Role / Device Role / Timing Role: Persistent settings storage accessed on power-up and after user input via ARM Cortex-M MCU. Use Value: Ensures consistent UI behavior across power cycles without requiring supercapacitor or backup battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46CT-I/MNY | Same 128×8-bit organization and DFN 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 ≥2.5 V and cost optimization is prioritized over ultra-low-voltage support |
| AT25010B-MAHL-T | 1 Kbit SPI EEPROM (4-wire), 1.8–5.5 V, 20 MHz max clock - different interface protocol and faster write (5 ms) | Requires SPI peripheral instead of bit-banged Microwire; no ORG pin ambiguity | Choose when MCU has hardware SPI and higher throughput or standardized SPI ecosystem is preferred |
Compared with 93LC46CT-I/MNY and AT25010B-MAHL-T, the 93AA46CT-I/MNY uniquely supports 1.8 V operation while retaining full Microwire compatibility and identical pinout in the MNY package - critical for legacy or resource-constrained 1.8 V designs where SPI peripherals are unavailable.
Availability
93AA46CT-I/MNY is available at Aetrix Electronics and suitable for motor control systems, smart sensor modules, IoT edge devices, and industrial HMI displays requiring stable component supply, long-term data integrity, and industrial temperature qualification.
Supply support for 93AA46CT-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 93AA46CT-I/MNY belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems requiring simple, reliable nonvolatile storage with minimal pin count and software overhead.
FAQ
What is the memory organization of the 93AA46CT-I/MNY?
The 93AA46CT-I/MNY is a fixed 128 × 8-bit (1 Kbit) device with no ORG pin functionality - it operates exclusively in x8 mode. Unlike 'C'-suffix variants with configurable organization, the 'A' suffix denotes dedicated 8-bit communication, and the ORG pin is internally disconnected (NC) and must remain unconnected in the circuit.
Does the 93AA46CT-I/MNY support 1.8 V operation?
Yes, the 93AA46CT-I/MNY supports a VCC range of 1.8 V to 5.5 V, making it compatible with modern ultra-low-power microcontrollers and SoCs. Its VPOR threshold is 1.5 V typical, ensuring write inhibition during power ramp-up or brownout conditions at 1.8 V nominal supply.
How is Ready/Busy status monitored on the 93AA46CT-I/MNY?
Ready/Busy status is signaled on the DO pin: logic low indicates an erase or write operation is in progress; logic high confirms completion. To read status, CS must be brought high for ≥250 ns after the command initiation, then DO sampled - the pin returns to High-Z when CS is low or after status polling completes.
What is the purpose of the NC pin on the 93AA46CT-I/MNY DFN package?
Pin 5 on the 93AA46CT-I/MNY (8-lead 2×3 DFN) is designated NC (No Connection) - it is electrically unconnected and unbonded. Per Microchip's layout guidance, it may be left floating or tied to VSS for mechanical stability; it must never be driven or used as a signal path.
Can the 93AA46CT-I/MNY be used interchangeably with the 93LC46CT-I/MNY?
No - while both share the same package and 128×8-bit organization, the 93AA46CT-I/MNY operates from 1.8 V, whereas the 93LC46CT-I/MNY requires minimum 2.5 V. Substituting them risks functional failure in 1.8 V or 2.0 V systems, and electrical validation is required even within the overlapping 2.5–5.5 V range due to minor timing and leakage differences.
93AA46CT-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:
- 1Kbit
- Memory Organization:
- 128 x 8, 64 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)
93AA46CT-I/MNY FAQ
1.How can I place an order for 93AA46CT-I/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46CT-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 93AA46CT-I/MNY reliable?
The price and inventory of 93AA46CT-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 93AA46CT-I/MNY is usually 5 days.
3.What payment methods are accepted for 93AA46CT-I/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46CT-I/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46CT-I/MNY?
93AA46CT-I/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46CT-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 93AA46CT-I/MNY?
For technical support, including 93AA46CT-I/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46CT-I/MNY requirements.
6.How does Aetrix verify that 93AA46CT-I/MNY is sourced from the original manufacturer or authorized distributors?
All 93AA46CT-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 93AA46CT-I/MNY meets industry standards.
7.What is the process for return or replacement of 93AA46CT-I/MNY?
All 93AA46CT-I/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46CT-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 93AA46CT-I/MNY part is unused and in its original packaging.
Return procedure for 93AA46CT-I/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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