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Microchip Technology 93C46BT-I/MNY
- Part No.:
- 93C46BT-I/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93C46BT-I/MNY.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,011
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Product details
Overview
93C46BT-I/MNY from Microchip Technology Inc. is a 1 Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 4.5–5.5 V supply range, industrial temperature rating (−40°C to +85°C), and 1,000,000 erase/write cycles. It operates in dedicated 8-bit organization (no ORG pin functionality), used for nonvolatile parameter storage in microcontroller-based embedded systems.
For engineers reviewing the 93C46BT-I/MNY datasheet, 93C46BT-I/MNY pinout, 93C46BT-I/MNY application, or 93C46BT-I/MNY equivalent, key selection criteria include its fixed 8-bit x128 organization, 2 ms write cycle time, Ready/Busy status via DO pin, RoHS-compliant 8-lead MSOP package, and compatibility with legacy Microwire host controllers requiring minimal firmware changes.
Technical Context
The 93C46BT-I/MNY implements a synchronous serial interface using CS, CLK, and DI/DO signals with start-bit detection and opcode-driven command execution. It supports READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS instructions with clock-synchronized data transfer on CLK rising edges.
Its internal architecture includes an address decoder, mode decode logic, data register, and output buffer, with power-on data protection triggered at VCC < 3.8 V. Write operations are self-timed and auto-erase enabled; DO pin provides real-time Ready/Busy status during programming when CS is reasserted after ≥250 ns low time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 1 Kbit (128 × 8-bit), fixed x8 organization - no ORG pin required; simplifies PCB layout and firmware addressing. |
| VCC range | 4.5 V to 5.5 V - compatible with standard 5 V logic systems; POR threshold at 3.8 V ensures reliable power-up initialization. |
| Write cycle time | 2 ms - enables fast field updates without blocking host MCU for extended periods. |
| Endurance | 1,000,000 erase/write cycles - supports long-term logging or configuration retention in industrial equipment. |
| Data retention | 200 years at 25°C - guarantees persistent storage across product lifecycle without refresh. |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - interoperable with legacy PIC® MCU peripherals and simple GPIO bit-banging implementations. |
| Temperature grade | Industrial (−40°C to +85°C) - validated for operation in factory automation, metering, and control panels. |
Pinout & Package
93C46BT-I/MNY is housed in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, dimensions 3.0 × 3.0 × 1.0 mm, exposed pad optional for thermal relief. Pin 1 marked by laser dot; pin 1 ID corner indicated on top marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; device enters Standby mode when low; minimum 250 ns low time required between commands. |
| CLK | Serial Clock | Synchronizes all data transfers; opcodes, addresses, and data sampled on rising edge; clock may be paused mid-transfer. |
| DI | Data Input | Receives Start bit, instruction opcodes, addresses, and write data; must be high with CS at first CLK rising edge to initiate communication. |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS low or during non-read states. |
| VSS | Ground | Reference for all I/O and internal circuitry; must be connected directly to system ground plane. |
| NC | No Connection | Pin 7 is unconnected internally - must be left floating or tied to VSS per layout best practice; not usable as strap or debug pin. |
| VCC | Power Supply | 4.5–5.5 V supply input; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin. |
| ORG | Organization Select | Not implemented on 93C46B variants - pin 6 is NC; eliminates need for external pull-up/down resistor and reduces BOM count. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write cycles | Eliminates need for external timing control or polling delays beyond TWC (2 ms); host MCU can execute other tasks during programming. |
| Automatic ERAL before WRAL | WRAL instruction performs full-array erase + write in one atomic operation - prevents partial writes and ensures memory consistency. |
| Power-on/off data protection | Hardware lockout below 3.8 V VCC prevents corruption during brown-out or hot-plug events without software intervention. |
| Ready/Busy status via DO pin | Enables efficient polling instead of fixed delay waits; reduces average write latency and improves system responsiveness. |
| 128 × 8-bit fixed organization | Removes ORG pin dependency and associated external logic; simplifies schematic, layout, and firmware driver development. |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during power-up initialization and field recalibration routines. Use Value: Enables plug-and-play sensor replacement with zero manual setup; 200-year data retention ensures calibration survives equipment lifetime. | Use Scenario: Retaining user preferences (temperature setpoints, cycle modes) across power cycles in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Low-pin-count serial EEPROM interfaced to 8-bit MCU via GPIO bit-banged Microwire protocol. Use Value: 1M endurance supports daily configuration changes over 27 years; 2 ms write time avoids UI lag during setting saves. |
| Medical Device Settings Backup | Automotive Body Control Module |
Use Scenario: Preserving therapy parameters and usage logs in portable infusion pumps subject to frequent battery swaps. IC Role / Device Role / Timing Role: Fail-safe storage element with hardware write protection activated during power transitions. Use Value: Power-loss immunity down to 3.8 V prevents corruption during battery insertion/removal; RoHS compliance meets medical regulatory requirements. | Use Scenario: Storing door lock/unlock patterns, mirror position presets, and lighting profiles in vehicle BCMs. IC Role / Device Role / Timing Role: Dedicated 8-bit serial EEPROM integrated into CAN/LIN subsystem for configuration persistence. Use Value: Industrial temp grade ensures reliability under dashboard heat; fixed x8 organization reduces firmware complexity versus configurable alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93C46AT-I/MNY | Same 128×8 organization but wider VCC range (1.8–5.5 V); uses different process node with lower standby current. | Supports battery-powered devices operating down to 1.8 V; unsuitable where strict 5 V rail regulation is enforced. | Select 93C46AT-I/MNY only if system VCC may dip below 4.5 V; otherwise 93C46BT-I/MNY offers tighter voltage tolerance and proven stability in 5 V designs. |
| AT25010B-MAHL-T | 1 Kbit SPI interface (4-wire), 1.8–5.5 V, 5 ms write cycle, no Ready/Busy pin - requires fixed-delay polling. | Requires SPI peripheral or bit-banged implementation; lacks DO-based status signaling, increasing host overhead. | Choose AT25010B-MAHL-T only if SPI is already standardized across the BOM; 93C46BT-I/MNY retains Microwire compatibility and faster 2 ms writes with status feedback. |
Compared with 93C46AT-I/MNY, the 93C46BT-I/MNY trades wide-voltage flexibility for optimized 5 V performance and tighter timing control; versus AT25010B-MAHL-T, it delivers deterministic 2 ms writes with hardware status signaling-critical for real-time embedded response.
Availability
93C46BT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, and medical device settings backup requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 93C46BT-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, serving industrial, automotive, and consumer markets globally.
The 93Cxx series was designed specifically for cost-sensitive, space-constrained embedded systems requiring reliable nonvolatile storage with minimal pin count and firmware overhead-targeting applications where Microwire compatibility and hardware data protection are essential.
FAQ
What is the memory organization of the 93C46BT-I/MNY?
The 93C46BT-I/MNY has a fixed 128 × 8-bit (1 Kbit) organization. It belongs to the 'B' variant family, meaning it does not use the ORG pin-unlike 'C' versions-and is hardwired for 8-bit operation. This eliminates external configuration logic and simplifies integration into existing Microwire-based designs that expect x8 addressing.
Does the 93C46BT-I/MNY support 3.3 V operation?
No, the 93C46BT-I/MNY requires a VCC supply between 4.5 V and 5.5 V. Its power-on reset threshold is 3.8 V, so operation below 4.5 V is outside specification and may result in unreliable reads or writes. For 3.3 V systems, consider the 93LC46BT-I/MNY (2.5–5.5 V) or 93AA46BT-I/MNY (1.8–5.5 V) variants instead of the 93C46BT-I/MNY.
How is write protection implemented on the 93C46BT-I/MNY?
Write protection on the 93C46BT-I/MNY is implemented through hardware power-on disable and explicit command control: the device powers up in Erase/Write Disable (EWDS) mode, and an EWEN command must precede any ERASE or WRITE instruction. After each write, issuing EWDS restores protection. Additionally, VCC below 3.8 V automatically inhibits all programming-ensuring data integrity during brown-out conditions.
What package type is used for the 93C46BT-I/MNY?
93C46BT-I/MNY is packaged in an 8-lead MSOP (Micro Small Outline Package) with 3.0 mm × 3.0 mm body, 0.65 mm lead pitch, and optional exposed pad. The 'MNY' suffix explicitly denotes this MSOP variant per Microchip's packaging nomenclature. It is RoHS-compliant with Matte Tin (Sn) finish and suitable for reflow soldering per J-STD-020.
Can the 93C46BT-I/MNY be used with SPI interfaces?
The 93C46BT-I/MNY is not SPI-compatible-it uses a proprietary Microwire-compatible 3-wire interface (CS, CLK, DI/DO) with start-bit detection and specific opcode formats. While bit-banged GPIO can emulate its timing, standard SPI peripherals cannot drive it directly due to differences in clock polarity, phase, and command framing. Use only with Microwire-capable MCUs or verified bit-bang drivers.
93C46BT-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:
- 2ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
93C46BT-I/MNY FAQ
1.How can I place an order for 93C46BT-I/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C46BT-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 93C46BT-I/MNY reliable?
The price and inventory of 93C46BT-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 93C46BT-I/MNY is usually 5 days.
3.What payment methods are accepted for 93C46BT-I/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C46BT-I/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C46BT-I/MNY?
93C46BT-I/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C46BT-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 93C46BT-I/MNY?
For technical support, including 93C46BT-I/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C46BT-I/MNY requirements.
6.How does Aetrix verify that 93C46BT-I/MNY is sourced from the original manufacturer or authorized distributors?
All 93C46BT-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 93C46BT-I/MNY meets industry standards.
7.What is the process for return or replacement of 93C46BT-I/MNY?
All 93C46BT-I/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93C46BT-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 93C46BT-I/MNY part is unused and in its original packaging.
Return procedure for 93C46BT-I/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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