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Microchip Technology 93LC46BT-E/MNY
- Part No.:
- 93LC46BT-E/MNY
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
93LC46BT-E/MNY.pdf
- Description:
- IC EEPROM 1KBIT MICROWIRE 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,805
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Product details
Overview
93LC46BT-E/MNY from Microchip Technology Inc. is a 1 Kbit (128 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating from 2.5 V to 5.5 V, supporting Industrial and Automotive temperature ranges (−40°C to +125°C), and featuring self-timed erase/write cycles, automatic ERAL/WRAL, and Ready/Busy status signaling - used for configuration storage in automotive body control modules.
For engineers reviewing the 93LC46BT-E/MNY datasheet, 93LC46BT-E/MNY pinout, 93LC46BT-E/MNY application, or 93LC46BT-E/MNY equivalent, key selection criteria include voltage range compatibility (2.5–5.5 V), automotive-grade temperature support, 8-bit fixed organization (no ORG pin), 1 million endurance cycles, and DFN-8 (2×3 mm) package footprint constraints.
Technical Context
The 93LC46BT-E/MNY implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins, using rising-edge clocking for instruction/address/data transfer. It operates exclusively in 8-bit organization ('A' variant), eliminating ORG pin dependency and simplifying host controller timing.
Its internal architecture includes auto-erase-before-write logic, power-on/off data protection circuitry, and a dedicated Ready/Busy status output via DO pin during erase/write operations - enabling non-blocking firmware polling without external hardware handshaking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Kbit (128 × 8-bit) - fixed 8-bit word width; no ORG pin required. |
| VCC Range | 2.5 V to 5.5 V - supports wide supply rails including 3.3 V and 5 V systems. |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in frequent reconfiguration scenarios. |
| Data Retention | 200 years at +25°C - guarantees persistent storage across product lifecycles without refresh. |
| Temp Range | −40°C to +125°C (Automotive E-grade) - qualified for under-hood and safety-critical ECUs. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage; no SPI mode or address lines needed. |
| Write Cycle Time | 6 ms typical (TWC) - deterministic timing enables predictable firmware timeout handling. |
Pinout & Package
93LC46BT-E/MNY is housed in an 8-lead 2×3 mm DFN (Dual Flat No-lead) package with exposed thermal pad, Pb-free Matte Tin finish, and pin 1 marked by laser. The ORG pin is not present (NC) on this 'A'-variant device.
| 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 | Rising-edge synchronized I/O; clock can pause mid-transfer; no clocks required during write cycle. |
| 3 (DI) | Data Input | Accepts Start bit, opcode, address, and data; tied high with CS to detect Start condition. |
| 4 (DO) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS is low or after status check. |
| 5 (NC) | No Internal Connection | Unbonded pad; must be left floating or grounded per layout guidelines - no electrical function. |
| 6 (VSS) | Ground | Reference for all I/O and internal logic; connects to exposed thermal pad for thermal management. |
| 7 (VCC) | Power Supply | 2.5–5.5 V input; internal POR triggers at ~1.5 V; requires stable bypass capacitor near pin. |
| 8 (NC) | No Internal Connection | Unbonded pad; no connection to die; may be used as mechanical anchor or left unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing control or wait-state insertion in host firmware. |
| Automatic ERAL before WRAL | Ensures full-array write integrity without requiring separate erase command sequence. |
| Ready/Busy Status on DO | Enables real-time polling without additional status pins or interrupt lines. |
| Power-On/Off Data Protection | Hardware-level lockout below VCC = 1.5 V prevents corruption during brown-out or power ramp. |
| RoHS Compliant & Pb-Free | Meets global environmental regulations; Matte Tin finish ensures solderability and wire-bond reliability. |
Applications
| Automotive Body Control Unit | Industrial Sensor Calibration Storage |
|---|---|
Use Scenario: Storing door lock configuration, mirror position presets, and lighting profiles in vehicle BCMs. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to 8-bit microcontroller GPIOs via Microwire. Use Value: Automotive-grade temperature rating and 1M-cycle endurance ensure reliable operation over 15+ year vehicle life. |
Use Scenario: Retaining factory-calibrated offset/gain coefficients for analog sensor front-ends in process transmitters. IC Role / Device Role / Timing Role: Low-power serial EEPROM accessed during sensor power-up to load calibration constants. Use Value: 2.5 V minimum VCC allows direct integration with 3.3 V sensor signal chains without level-shifting. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Parameters |
Use Scenario: Securing drug library limits, alarm thresholds, and user preferences in Class II medical devices. IC Role / Device Role / Timing Role: Safety-critical configuration store with hardware write-protection (EWDS/EWEN). Use Value: Power-on data protection and 200-year retention meet IEC 62304 software lifecycle requirements. |
Use Scenario: Holding tariff tables, communication protocol settings, and metering calibration in ANSI C12.22-compliant meters. IC Role / Device Role / Timing Role: Tamper-resistant parameter storage accessible via isolated UART-to-Microwire bridge IC. Use Value: DFN-8 package enables compact PCB layout in space-constrained meter modules while maintaining ESD robustness (>4 kV). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC46B-I/MNY | Same 128×8-bit organization, but Industrial grade (−40°C to +85°C); identical DFN-8 package and pinout. | Lacks automotive qualification; unsuitable for under-hood or safety-critical use cases requiring AEC-Q100 compliance. | Select only for cost-sensitive industrial designs where extended temperature is unnecessary. |
| AT25010B-MAHL-T | SPI interface (4-wire), 1 Kbit (128×8), 1.8–5.5 V, SOIC-8 package; no Ready/Busy pin - relies on WIP flag polling. | Requires additional chip select line and different firmware driver; SOIC-8 footprint incompatible with DFN-8 layout. | Choose only if existing SPI infrastructure exists and board redesign for DFN is not feasible. |
Compared with 93LC46B-I/MNY, the 93LC46BT-E/MNY adds automotive temperature qualification and tighter VCC POR threshold; versus AT25010B-MAHL-T, it offers simpler 3-wire interface, built-in status signaling, and smaller DFN footprint - critical for space-constrained automotive modules.
Availability
93LC46BT-E/MNY is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and medical device manufacturing requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 93LC46BT-E/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 93LC46 series belongs to Microchip's legacy Microwire EEPROM product line, designed specifically for cost-sensitive, low-pin-count embedded systems requiring robust nonvolatile storage in harsh environments.
FAQ
What is the memory organization of the 93LC46BT-E/MNY?
The 93LC46BT-E/MNY is a fixed 128 × 8-bit (1 Kbit) EEPROM - designated as an 'A' variant in Microchip's 93LC46 family. It does not include an ORG pin and operates exclusively in 8-bit mode, eliminating configuration ambiguity and simplifying host interface logic compared to 'C' variants with selectable word size.
Does the 93LC46BT-E/MNY require an external pull-up resistor on the DO pin?
No, the 93LC46BT-E/MNY does not require an external pull-up on DO. The DO pin actively drives high/low during Read or Ready/Busy status reporting and enters High-Z when deselected or idle. However, a 10 kΩ pull-down on CS is recommended per Microchip's application guidance to prevent spurious activation during power-up.
Can the 93LC46BT-E/MNY be used with a 1.8 V microcontroller system?
No, the 93LC46BT-E/MNY has a minimum VCC specification of 2.5 V and is not rated for 1.8 V operation. For 1.8 V systems, consider the 93AA46A/B/C series (1.8–5.5 V range), which shares functional compatibility but differs in voltage tolerance and POR threshold.
How is write protection implemented on the 93LC46BT-E/MNY?
Write protection is enforced through dual hardware/software mechanisms: (1) Power-on default to EWDS (Erase/Write Disable) state, requiring explicit EWEN command before any erase/write; (2) VCC-based hardware lockout below ~1.5 V. Both features prevent accidental writes during brown-out or reset conditions.
What package type does the 93LC46BT-E/MNY use, and is the exposed pad electrically connected?
The 93LC46BT-E/MNY uses an 8-lead 2×3 mm DFN package (MNY suffix). Its exposed thermal pad is internally connected to VSS and must be soldered to a PCB ground plane for thermal performance and EMI reduction - per Microchip's packaging specification DS20001749K, page 26.
93LC46BT-E/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:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
93LC46BT-E/MNY FAQ
1.How can I place an order for 93LC46BT-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC46BT-E/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 93LC46BT-E/MNY reliable?
The price and inventory of 93LC46BT-E/MNY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC46BT-E/MNY is usually 5 days.
3.What payment methods are accepted for 93LC46BT-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC46BT-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC46BT-E/MNY?
93LC46BT-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC46BT-E/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 93LC46BT-E/MNY?
For technical support, including 93LC46BT-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC46BT-E/MNY requirements.
6.How does Aetrix verify that 93LC46BT-E/MNY is sourced from the original manufacturer or authorized distributors?
All 93LC46BT-E/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 93LC46BT-E/MNY meets industry standards.
7.What is the process for return or replacement of 93LC46BT-E/MNY?
All 93LC46BT-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with 93LC46BT-E/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 93LC46BT-E/MNY part is unused and in its original packaging.
Return procedure for 93LC46BT-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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