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Microchip Technology 93AA46BT-I/MNY
- Part No.:
- 93AA46BT-I/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93AA46BT-I/MNY.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,696
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Product details
Overview
93AA46BT-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, industrial temperature rating (–40°C to +85°C), and 1 million erase/write cycles. It serves as nonvolatile configuration storage in microcontroller-based systems requiring reliable, low-power memory for calibration data, device IDs, or boot parameters.
For engineers reviewing the 93AA46BT-I/MNY datasheet, 93AA46BT-I/MNY pinout, 93AA46BT-I/MNY application, or 93AA46BT-I/MNY equivalent, key selection criteria include its dedicated 8-bit organization (no ORG pin), TSSOP-8 package, 3 MHz max clock frequency at 4.5–5.5 V, Ready/Busy status signaling via DO, and automatic erase-before-write functionality.
Technical Context
This device implements a synchronous serial Microwire protocol with start-bit detection, opcode-driven instruction set (READ, WRITE, ERASE, ERAL, EWEN/EWDS), and self-timed internal erase/write cycles. It uses a 7-bit address space for 128-byte addressing and supports sequential read mode when CS remains high.
Power-on data protection is enforced by a built-in voltage detector (VPOR = 1.5 V typical), and write operations require explicit Erase/Write Enable (EWEN) before execution. The DO pin doubles as both data output and Ready/Busy indicator, transitioning from High-Z to logic level only after CS is reasserted post-TCSL (≥250 ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit); fixed x8 organization - no ORG pin required, simplifying PCB layout and firmware initialization. |
| VCC range | 1.8 V to 5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifters. |
| Clock frequency | Up to 3 MHz at VCC ≥ 4.5 V - supports fast configuration reads in time-critical boot sequences. |
| Endurance | 1,000,000 erase/write cycles - suitable for field-updatable parameters with frequent revision logging. |
| Data retention | Greater than 200 years at 25°C - ensures long-term reliability in unattended industrial equipment. |
| Standby current | 1 µA maximum (I-temp) - critical for battery-powered sensors and IoT edge nodes. |
| Interface | 3-wire Microwire (CS, CLK, DI/DO) - reduces pin count and routing complexity vs. SPI or I²C. |
Pinout & Package
93AA46BT-I/MNY is housed in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm lead pitch, RoHS-compliant matte tin finish, and exposed pad option (not present in /MNY variant). Pin 1 is marked by laser dot; package dimensions: 3.0 mm × 4.4 mm × 1.2 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; controls entry into Standby mode when deasserted. |
| 2 (CLK) | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcodes, addresses, and data; stoppable mid-sequence. |
| 3 (DI) | Data Input | Receives Start bit, instruction opcodes, addresses, and write data; shares net with DO in single-line configurations (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 during non-read operations. |
| 5 (VSS) | Ground | Reference return path for all signals and power; requires low-impedance connection to minimize noise coupling. |
| 6 (NC) | No Connect | Internally unconnected; must be left floating or tied to VSS per design guidelines - no external loading permitted. |
| 7 (ORG) | Organization Select | Not applicable - 93AA46B devices have ORG pin internally disconnected; this pin is NC and must not be driven. |
| 8 (VCC) | Power Supply | 1.8–5.5 V supply input; includes on-chip power-on reset (POR) circuitry that blocks writes below 1.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates need for external timing control - firmware waits only for DO polling or fixed 6 ms timeout, reducing CPU overhead. |
| Automatic ERAL before WRAL | Ensures full array is erased prior to bulk write, preventing stale data corruption without separate erase command sequencing. |
| Power-on/off data protection | Hardware-enforced write inhibition below VPOR threshold (1.5 V) prevents partial writes during brown-out or hot-plug events. |
| Ready/Busy status on DO | Enables efficient polling instead of fixed delays - DO low indicates active programming, allowing concurrent CPU tasks. |
| 128 × 8-bit fixed organization | Removes ORG pin dependency and eliminates configuration ambiguity - simplifies schematic review and firmware driver development. |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor gain/offset coefficients and user-adjusted compensation values in portable gas analyzers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up and runtime recalibration; operates at 3.3 V with ≤100 µA read current. Use Value: Maintains traceable calibration across 200+ year lifespan and 1M write cycles, meeting ISO 13485 data integrity requirements. | Use Scenario: Holding patient-specific therapy settings (e.g., infusion rate limits, alarm thresholds) in battery-powered insulin pumps. IC Role / Device Role / Timing Role: Secure, low-power configuration vault; accessed via MCU's Microwire peripheral during setup and safety checks. Use Value: 1 µA standby current extends battery life; 1.8 V operation enables direct use with Li-ion cells down to 2.0 V. |
| Automotive ECU Boot Parameters | Smart Meter Firmware Metadata |
Use Scenario: Storing CAN node ID, bootloader version, and hardware revision flags in engine control modules operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade EEPROM interfaced to 5 V MCU; withstands automotive load-dump transients via robust ESD protection (≥4 kV). Use Value: Guaranteed operation over full industrial temp range with no derating; RoHS-compliant Pb-free finish meets AEC-Q200 alignment expectations. | Use Scenario: Recording firmware checksums, update timestamps, and meter serial number in utility smart meters deployed for >15 years. IC Role / Device Role / Timing Role: Tamper-resistant metadata repository; accessed infrequently but must retain data through 200+ years of thermal cycling. Use Value: 200-year data retention and 1M endurance exceed ANSI C12.22 security lifetime requirements for AMI infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46BT-I/MNY | Same 128 × 8-bit organization and TSSOP-8 package, but 2.5–5.5 V VCC range - lacks 1.8 V support. | Not suitable for 1.8 V systems; otherwise pin- and functionally identical for 3.3 V/5 V designs. | Select 93LC46BT-I/MNY only if system VCC never drops below 2.5 V and 1.8 V compatibility is unnecessary. |
| AT25010B-MAHL-T | 1 Kbit SPI EEPROM (4-wire), 1.8–5.5 V, 20 MHz clock, but requires separate SO/SI lines and chip-select management. | Higher throughput but consumes one additional MCU GPIO; incompatible Microwire protocol requires driver rewrite. | Choose AT25010B-MAHL-T only when migrating to SPI-based architecture or needing >3 MHz write speed. |
Compared with 93LC46BT-I/MNY, the 93AA46BT-I/MNY enables true 1.8 V operation and retains identical timing, pinout, and instruction set - making it the sole drop-in solution for ultra-low-voltage embedded systems. Versus AT25010B-MAHL-T, it preserves Microwire simplicity and pin count but trades off peak bandwidth for deterministic low-power behavior.
Availability
93AA46BT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive ECU boot parameters, and smart meter firmware metadata requiring stable component supply across extended product lifecycles.
Supply support for 93AA46BT-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 manufacturing and support infrastructure.
The 93AAxx family was designed specifically for cost-sensitive, low-power embedded systems needing simple, robust serial EEPROM - emphasizing micropower operation, wide VCC tolerance, and seamless integration with 8-bit and 16-bit MCUs.
FAQ
What is the memory organization of the 93AA46BT-I/MNY?
The 93AA46BT-I/MNY is a fixed 128 × 8-bit (1 Kbit) device with no ORG pin - it exclusively supports x8-word organization. Unlike 'C' variants, its ORG pin is internally disconnected (NC), eliminating configuration ambiguity and simplifying firmware initialization. This matches the 'B' designation in Microchip's 93XX46 naming convention.
Does the 93AA46BT-I/MNY support 1.8 V operation?
Yes, the 93AA46BT-I/MNY supports a VCC range of 1.8 V to 5.5 V, enabling direct interface with 1.8 V logic families and battery-powered systems. Its voltage detector (VPOR = 1.5 V typical) ensures write protection during brown-out conditions, and DC characteristics including ICC write (2 µA at 2.5 V) and standby current (1 µA) are fully specified down to 1.8 V.
How is Ready/Busy status monitored on the 93AA46BT-I/MNY?
Ready/Busy status is signaled on the DO pin: logic low indicates active erase/write, logic high means operation complete. To read status, CS must be brought high for ≥250 ns after TCSL, then DO sampled. After completion, issuing a Start bit followed by CS low clears the status flag. DO returns to High-Z when CS is low or during non-read operations.
What package type is used for the 93AA46BT-I/MNY?
The 93AA46BT-I/MNY uses an 8-lead TSSOP (Thin Shrink Small Outline Package) with 3.0 mm × 4.4 mm body, 0.65 mm lead pitch, and RoHS-compliant matte tin finish. Pin 1 is laser-marked; the package is designated 'ST' in Microchip's ordering nomenclature and is compatible with standard SMT reflow profiles.
Is the 93AA46BT-I/MNY pin-compatible with other 93XX46 variants?
Yes - the 93AA46BT-I/MNY shares identical TSSOP-8 pinout and signal mapping with all 93XX46A/B/C devices in the same package (e.g., 93LC46BT-I/MNY, 93C46BT-I/MNY), including CS, CLK, DI, DO, VSS, NC, ORG (NC for A/B), and VCC. However, electrical differences (e.g., VCC range, endurance, AC specs) require validation for drop-in replacement in existing designs.
93AA46BT-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:
- 64 x 16
- 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)
93AA46BT-I/MNY FAQ
1.How can I place an order for 93AA46BT-I/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA46BT-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 93AA46BT-I/MNY reliable?
The price and inventory of 93AA46BT-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 93AA46BT-I/MNY is usually 5 days.
3.What payment methods are accepted for 93AA46BT-I/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA46BT-I/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA46BT-I/MNY?
93AA46BT-I/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA46BT-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 93AA46BT-I/MNY?
For technical support, including 93AA46BT-I/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA46BT-I/MNY requirements.
6.How does Aetrix verify that 93AA46BT-I/MNY is sourced from the original manufacturer or authorized distributors?
All 93AA46BT-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 93AA46BT-I/MNY meets industry standards.
7.What is the process for return or replacement of 93AA46BT-I/MNY?
All 93AA46BT-I/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93AA46BT-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 93AA46BT-I/MNY part is unused and in its original packaging.
Return procedure for 93AA46BT-I/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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