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Microchip Technology 93AA46AT-I/MC
- Part No.:
- 93AA46AT-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
93AA46AT-I/MC.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,933
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Product details
Overview
93AA46AT-I/MC from Microchip Technology 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), and Ready/Busy status via DO pin. Used for configuration storage in embedded microcontroller systems requiring nonvolatile parameter retention.
For engineers reviewing the 93AA46AT-I/MC datasheet, 93AA46AT-I/MC pinout, 93AA46AT-I/MC application, or 93AA46AT-I/MC equivalent, key selection criteria include its dedicated 8-bit organization (no ORG pin), DFN-8 (2×3 mm) package with exposed pad, 1 million erase/write endurance, and 200-year data retention - critical for long-life industrial firmware and calibration storage.
Technical Context
This device implements a synchronous serial Microwire protocol with CS/CLK/DI/DO signaling and no ORG pin - confirming fixed 8-bit word width and eliminating external configuration logic. Its internal architecture includes auto-erase-before-write, ERAL/WRAL command support, and power-on/off data protection circuitry that locks writes below 1.5 V.
Timing is governed by strict AC parameters: max 3 MHz clock frequency at VCC ≥ 4.5 V, TPD ≤ 400 ns (1.8–2.5 V), and TWC = 6 ms write cycle time. The DO pin serves dual function - serial data output during READ and active-low Ready/Busy indicator during programming - requiring precise CS timing (TCSL ≥ 250 ns) for status polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit) - fixed x8 organization; no ORG pin; supports 128-byte sequential read/write. |
| Supply voltage | 1.8 V to 5.5 V - enables direct interface with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifters. |
| Endurance | 1,000,000 erase/write cycles - ensures reliable field updates over product lifetime in programmable logic controllers. |
| Data retention | 200 years at +85°C - guarantees calibration data integrity across decades in sealed industrial enclosures. |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI, DO) - minimal GPIO usage; no SPI mode bits or address latches required. |
| Operating temp | –40°C to +85°C (Industrial grade) - validated for use in factory automation, motor drives, and HVAC control units. |
| Write cycle time | 6 ms typical (TWC) - deterministic programming latency; enables predictable firmware update sequencing in real-time systems. |
Pinout & Package
93AA46AT-I/MC uses an 8-lead 2×3 mm DFN (Dual Flat No-lead) package with exposed thermal pad (pin 5), Pb-free Matte Tin finish, and JEDEC-compliant footprint. Pin 1 marked by laser dot; exposed pad recommended to be connected to VSS for thermal and EMI 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. |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence. |
| 3 (DI) | Data Input | Accepts Start bit, instruction opcodes, addresses, and write data; high-impedance when not selected. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge; requires external pull-up. |
| 5 (NC) | No Internal Connection | Exposed thermal pad - connect to VSS plane for improved thermal dissipation and noise immunity. |
| 6 (ORG) | Organization | No internal connection - confirms fixed 8-bit word size; unused and must be left unconnected or tied to VSS. |
| 7 (VSS) | Ground | Reference for all I/O and internal logic; tie directly to system ground plane under exposed pad. |
| 8 (VCC) | Power Supply | 1.8–5.5 V input; internal POR triggers at 1.5 V; decoupling capacitor (0.1 µF) required within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing control; 6 ms typical cycle completes autonomously after CS fall - simplifies host firmware. |
| Automatic ERAL before WRAL | Guarantees full-array readiness before bulk write; prevents partial writes and data corruption without host intervention. |
| Ready/Busy status on DO | Enables non-blocking polling - host reads DO while CS high post-write to determine completion, avoiding fixed delays. |
| Power-on/off data protection | Hardware lockout below 1.5 V prevents spurious writes during brown-out or hot-plug events - critical for field-replaceable modules. |
| 128 × 8-bit fixed organization | Removes ORG pin dependency and address mapping ambiguity; reduces BOM count and PCB layout complexity vs. C-series variants. |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
|
Use Scenario: Storing temperature-compensation coefficients and sensor offset values in smart pressure transmitters deployed in oil & gas pipelines. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed at power-up; retains data across 15+ year service life with zero maintenance. Use Value: Eliminates manual recalibration; enables field firmware updates of calibration tables without hardware replacement. |
Use Scenario: Holding boot parameters, network MAC addresses, and user-defined I/O mappings in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Serial configuration store interfaced to MCU's GPIO bit-banged Microwire port; accessed during cold start only. Use Value: Reduces boot time by 120 ms vs. flash-based alternatives; supports secure parameter locking via EWDS/EWEN commands. |
| Medical Device Settings | Automotive Subsystem Identity |
|
Use Scenario: Saving patient-specific therapy profiles and alarm thresholds in portable infusion pumps certified to IEC 60601-1. IC Role / Device Role / Timing Role: Safety-critical parameter store with 200-year retention; accessed via isolated digital interface to main MCU. Use Value: Meets FDA traceability requirements; enables audit-log timestamping using internal counter + EEPROM-stored epoch. |
Use Scenario: Storing unique CAN node ID, firmware version, and production date in automotive body control modules (BCM). IC Role / Device Role / Timing Role: Factory-programmed identity register; read once at startup and cached in RAM for runtime use. Use Value: Enables vehicle-level diagnostics (UDS) and OTA update authentication without increasing MCU flash usage. |
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/MC | Same 128 × 8-bit organization, but 2.5–5.5 V VCC range; lacks 1.8 V operation capability. | Not suitable for 1.8 V battery-powered devices; acceptable in 3.3 V industrial controllers with stable rail. | Select if system VCC never drops below 2.5 V and legacy design already uses 93LCxx family. |
| AT25010B-MAHL-T | SPI interface (4-wire), 1 Kbit (128 × 8), 1.8–5.5 V, but no ERAL/WRAL commands or Ready/Busy pin. | Requires software-managed timing instead of hardware status polling; increases MCU overhead during writes. | Choose when migrating to SPI-based platforms or when board space allows extra signal routing for CS/SCK/MOSI/MISO. |
Compared with 93LC46AT-I/MC, the 93AA46AT-I/MC enables lower-voltage operation down to 1.8 V and offers tighter power-on protection; versus AT25010B-MAHL-T, it provides deterministic status feedback and integrated erase-all functionality - reducing firmware complexity in resource-constrained MCUs.
Availability
93AA46AT-I/MC is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and medical device settings requiring stable component supply across extended product lifecycles.
Supply support for 93AA46AT-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 components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93AAxx series was designed specifically for low-power, cost-sensitive embedded systems needing reliable, pin-efficient nonvolatile storage - emphasizing micropower operation, wide VCC tolerance, and robust data integrity under thermal stress.
FAQ
What is the memory organization of the 93AA46AT-I/MC?
The 93AA46AT-I/MC has a fixed 128 × 8-bit (1 Kbit) organization with no ORG pin - confirming dedicated 8-bit word width. This eliminates external configuration logic and simplifies address decoding in microcontroller firmware, making it ideal for systems where pin count and layout simplicity are critical.
Does the 93AA46AT-I/MC support 1.8 V operation?
Yes, the 93AA46AT-I/MC operates across 1.8 V to 5.5 V, enabling direct interface with 1.8 V logic families and ultra-low-power microcontrollers. Its power-on reset threshold is 1.5 V, ensuring reliable data protection during brown-out conditions common in battery-backed systems.
How does the Ready/Busy status work on the 93AA46AT-I/MC?
The DO pin of the 93AA46AT-I/MC outputs Ready/Busy status during erase/write cycles: logic low indicates ongoing programming, logic high signals completion. Status is valid only when CS is brought high after ≥250 ns low time (TCSL); DO returns to High-Z on CS falling edge.
What package type is used for the 93AA46AT-I/MC?
The 93AA46AT-I/MC uses an 8-lead 2×3 mm DFN (Dual Flat No-lead) package with exposed thermal pad (designated "MC" in Microchip's packaging code). The pad is NC internally and should be soldered to VSS for optimal thermal performance and EMI suppression.
Is the 93AA46AT-I/MC RoHS compliant?
Yes, the 93AA46AT-I/MC is RoHS compliant and features a Pb-free Matte Tin (Sn) finish per JEDEC standards. All packages in the 93AAxx series, including the DFN-8 variant, meet EU Directive 2011/65/EU requirements for hazardous substance restrictions.
93AA46AT-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:
- 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-DFN (2x3)
93AA46AT-I/MC FAQ
1.How can I place an order for 93AA46AT-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46AT-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 93AA46AT-I/MC reliable?
The price and inventory of 93AA46AT-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 93AA46AT-I/MC is usually 5 days.
3.What payment methods are accepted for 93AA46AT-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46AT-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46AT-I/MC?
93AA46AT-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46AT-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 93AA46AT-I/MC?
For technical support, including 93AA46AT-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46AT-I/MC requirements.
6.How does Aetrix verify that 93AA46AT-I/MC is sourced from the original manufacturer or authorized distributors?
All 93AA46AT-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 93AA46AT-I/MC meets industry standards.
7.What is the process for return or replacement of 93AA46AT-I/MC?
All 93AA46AT-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46AT-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 93AA46AT-I/MC part is unused and in its original packaging.
Return procedure for 93AA46AT-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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