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Microchip Technology 93AA46AT-I/MNY
- Part No.:
- 93AA46AT-I/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93AA46AT-I/MNY.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,601
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Product details
Overview
93AA46AT-I/MNY from Microchip Technology Inc. is a 1 Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, and industrial temperature rating (–40°C to +85°C). It features self-timed erase/write cycles, automatic erase-all-before-write-all (ERAL/WRAL), power-on/off data protection, and Ready/Busy status signaling via DO pin - deployed in embedded system configuration storage, sensor calibration memory, and firmware parameter retention.
For engineers reviewing the 93AA46AT-I/MNY datasheet, 93AA46AT-I/MNY pinout, 93AA46AT-I/MNY application, or 93AA46AT-I/MNY equivalent, key selection considerations include its fixed 8-bit organization (no ORG pin), 8-lead MSOP package, 1 million erase/write endurance, 200+ year data retention, and compatibility with low-power microcontroller peripherals requiring serial nonvolatile memory with hardware write protection.
Technical Context
The 93AA46AT-I/MNY implements a synchronous Microwire protocol using CS, CLK, and DI/DO lines - no ORG pin required due to fixed x8 architecture. Its internal logic enforces power-on write disable (EWDS), requiring explicit EWEN before any erase or write operation, and supports sequential read with automatic address increment while CS remains high.
Timing is governed by voltage-dependent clock frequency limits (up to 3 MHz at VCC ≥ 4.5 V), with guaranteed TPD ≤ 400 ns and TWC = 6 ms for erase/write cycles. The device asserts Ready/Busy on DO after CS reactivation post-command, enabling polling-based host synchronization without external wait states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 words × 8 bits) - provides compact, byte-addressable nonvolatile storage for small configuration sets. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - requires only four MCU GPIOs and no address bus or parallel data lines. |
| VCC Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 3.3 V, and 5 V logic domains without level shifters. |
| Endurance | 1,000,000 erase/write cycles - enables frequent runtime updates in logging, calibration, or adaptive control applications. |
| Data Retention | Greater than 200 years at +25°C - ensures long-term reliability in unattended or maintenance-free deployments. |
| Operating Temp | –40°C to +85°C (Industrial grade) - qualified for use in automotive ECUs, industrial controllers, and outdoor IoT nodes. |
| Write Cycle Time | 6 ms typical (TWC) - defines minimum interval between successive write commands; enables deterministic firmware update timing. |
Pinout & Package
93AA46AT-I/MNY is packaged in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm lead pitch and exposed pad (optional VSS connection). Pin 1 is marked by laser indentation; package conforms to JEDEC MO-187AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable signal; must be held low ≥250 ns between instructions to reset internal state and prevent spurious command latching. |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks opcode/address/data into DI and clocks data out of DO. |
| 3 (DI) | Data Input | Receives Start bit, instruction opcodes, addresses, and write data; tied high during Start condition detection. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS is low or during non-read operations. |
| 5 (VSS) | Ground | Reference return path for all I/O and core logic; exposed pad may be connected to PCB ground plane for thermal and EMI performance. |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per layout best practice - no functional role. |
| 7 (NC) | No Connect | Second NC terminal; identical handling as Pin 6 - no routing or loading required. |
| 8 (VCC) | Power Supply | Core and I/O supply; includes internal POR circuit triggering at ~1.5 V - prevents corruption during brown-out conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing control or software delays - host initiates command and polls DO for completion. |
| Automatic ERAL before WRAL | Ensures full array is erased prior to bulk write, preventing partial-data corruption without requiring separate erase sequence. |
| Power-On/Off Data Protection | Hardware-enforced write inhibit below VCC threshold (~1.5 V) - guarantees memory integrity during power ramp-up/down. |
| Ready/Busy Status on DO | Enables efficient polling-based host synchronization without dedicated interrupt lines or fixed timeout loops. |
| Low Standby Current | ≤1 µA (ICCS) at I-temp - extends battery life in always-on sensor nodes and portable instrumentation. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Memory |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and user-defined alarm thresholds in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during boot and runtime via SPI-compatible Microwire interface. Use Value: Enables field-upgradable settings without firmware reflashing; 200-year retention ensures parameter persistence across equipment lifetime. |
Use Scenario: Holding factory-calibrated sensor offsets and gain coefficients in portable blood glucose meters and infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant parameter store accessed during device initialization and self-test sequences. Use Value: Meets IEC 62304 Class B requirements for data integrity; 1M-cycle endurance supports recalibration during service intervals. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Firmware Parameters |
Use Scenario: Retaining seat/mirror position presets, lighting profiles, and door lock configurations in 12 V automotive BCMs. IC Role / Device Role / Timing Role: Low-voltage EEPROM interfaced directly to 3.3 V microcontroller with integrated Microwire peripheral. Use Value: 1.8–5.5 V operation tolerates battery transients; industrial temp rating covers under-hood ambient extremes. |
Use Scenario: Storing tariff schedules, demand-response thresholds, and metering calibration constants in ANSI C12.20-compliant smart meters. IC Role / Device Role / Timing Role: Tamper-evident configuration memory updated infrequently but requiring absolute data integrity over 15+ year deployment. Use Value: RoHS-compliant Pb-free finish and 200-year retention satisfy utility-grade longevity and environmental compliance mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46AT-I/MNY | Same 128×8 organization and MSOP-8 package, but wider VCC range starts at 2.5 V (vs. 1.8 V). | Not suitable for 1.8 V systems; otherwise functionally identical in timing, instruction set, and endurance. | Select 93AA46AT-I/MNY for true 1.8 V operation; choose 93LC46AT-I/MNY if system VCC never drops below 2.5 V and legacy design reuse is prioritized. |
| AT25010B-MAHL-T | 1 Kbit SPI EEPROM (not Microwire), 2.5–5.5 V, SOIC-8, 5 MHz max clock, no ERAL/WRAL auto-erase. | Lacks automatic erase-all-before-write-all; requires explicit erase commands and supports standard SPI mode 0/3 only. | Use AT25010B-MAHL-T only when migrating to SPI infrastructure; 93AA46AT-I/MNY remains optimal for Microwire-native designs with auto-erase requirements. |
Compared with 93LC46AT-I/MNY and AT25010B-MAHL-T, the 93AA46AT-I/MNY uniquely delivers 1.8 V compatibility and integrated ERAL/WRAL auto-erase functionality in the same MSOP-8 footprint - critical for ultra-low-power and safety-critical configuration storage where voltage margin and data consistency are non-negotiable.
Availability
93AA46AT-I/MNY is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, automotive body electronics, and smart metering applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 93AA46AT-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, manufacturing, and sales operations.
The 93AA46A/B/C series was designed specifically for cost-sensitive, low-power embedded systems needing reliable serial EEPROM with hardware-level data protection and flexible voltage operation - targeting industrial control, consumer electronics, and automotive subsystems.
FAQ
What is the memory organization of the 93AA46AT-I/MNY?
The 93AA46AT-I/MNY has a fixed 128 × 8-bit (1 Kbit) organization with no ORG pin - unlike 'C' variants, it does not support word-size selection. This simplifies hardware design by eliminating external ORG pull-up/pull-down requirements and guarantees consistent 8-bit data framing for all read/write operations.
Does the 93AA46AT-I/MNY require an external pull-up resistor on the DO line?
No, the 93AA46AT-I/MNY drives DO actively during read and Ready/Busy status reporting; however, a 10 kΩ pull-down on CS is recommended per Microchip's application guidance to prevent spurious activation during power-up. DO operates in true three-state (High-Z) when inactive, so no pull-up is needed unless shared-bus contention is present.
How does the 93AA46AT-I/MNY handle power loss during a write cycle?
The 93AA46AT-I/MNY incorporates power-on/off data protection that inhibits all write operations when VCC falls below ~1.5 V. If power loss occurs mid-cycle, the internal charge pump cannot complete programming, and the affected memory location remains unaltered - ensuring atomicity and preventing partial writes or corruption.
Can the 93AA46AT-I/MNY be used with a 5 V microcontroller?
Yes, the 93AA46AT-I/MNY supports VCC from 1.8 V to 5.5 V and is fully compatible with 5 V logic levels: VIH1 = 2.0 V min (for VCC ≥ 2.7 V), and VOH1 = 2.4 V min at IOH = –400 µA - meeting standard TTL/CMOS input thresholds and ensuring robust interoperability without level translation.
What is the purpose of the NC pins on the 93AA46AT-I/MNY MSOP package?
Pins 6 and 7 of the 93AA46AT-I/MNY MSOP package are No Connect (NC) terminals - internally unconnected and electrically inert. They must be left floating or tied to VSS per PCB layout guidelines; routing signals or applying voltage to these pins has no functional effect and risks violating package mechanical integrity.
93AA46AT-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
- Memory Interface:
- Microwire
- Clock Frequency:
- 2 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)
93AA46AT-I/MNY FAQ
1.How can I place an order for 93AA46AT-I/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46AT-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 93AA46AT-I/MNY reliable?
The price and inventory of 93AA46AT-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 93AA46AT-I/MNY is usually 5 days.
3.What payment methods are accepted for 93AA46AT-I/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46AT-I/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46AT-I/MNY?
93AA46AT-I/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46AT-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 93AA46AT-I/MNY?
For technical support, including 93AA46AT-I/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46AT-I/MNY requirements.
6.How does Aetrix verify that 93AA46AT-I/MNY is sourced from the original manufacturer or authorized distributors?
All 93AA46AT-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 93AA46AT-I/MNY meets industry standards.
7.What is the process for return or replacement of 93AA46AT-I/MNY?
All 93AA46AT-I/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46AT-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 93AA46AT-I/MNY part is unused and in its original packaging.
Return procedure for 93AA46AT-I/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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