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Microchip Technology 93LC76BT-E/OT
- Part No.:
- 93LC76BT-E/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93LC76BT-E/OT.pdf
- Description:
- IC EEPROM 8KBIT MIC WIRE SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,406
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Product details
Overview
93LC76BT-E/OT from Microchip Technology Inc. is an 8Kbit, low-voltage, serial EEPROM with 512 × 16-bit organization, Microwire-compatible 3-wire interface (CS/CLK/DI/DO), and industrial-temperature operation (−40°C to +85°C). It features self-timed erase/write cycles, 1,000,000 endurance cycles, >200-year data retention, and operates from 2.5V to 5.5V - used in embedded system configuration storage and sensor calibration data logging.
For engineers reviewing the 93LC76BT-E/OT datasheet, 93LC76BT-E/OT pinout, 93LC76BT-E/OT application, or 93LC76BT-E/OT equivalent, key selection considerations include its 16-bit word width, SOT-23-6 package footprint, VCC range compatibility with 3.3V microcontrollers, and absence of ORG/PE pins - confirming it is a fixed-organization 'B' variant optimized for space-constrained designs requiring deterministic timing and nonvolatile parameter storage.
Technical Context
This device implements a synchronous serial Microwire protocol with start-bit detection, opcode-driven instruction set (READ/ERASE/WRITE/ERAL/WRAL/EWEN/EWDS), and Ready/Busy status reporting via DO pin polling. It uses internal auto-erase before write and supports sequential read without address retransmission.
Unlike 'C' variants, the 93LC76BT-E/OT lacks ORG and PE pins - eliminating external configuration logic but fixing memory organization to 512 × 16-bit and enabling write operations unconditionally. Its SOT-23-6 package integrates all core I/O (CS/CLK/DI/DO/VSS/VCC) with no auxiliary control pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbit (512 × 16-bit) - provides compact, byte-aligned storage for firmware parameters or calibration coefficients in resource-limited systems. |
| VCC range | 2.5V to 5.5V - compatible with both 3.3V and 5V logic domains without level-shifting. |
| Interface | Microwire 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage; no SPI mode select or MISO/MOSI separation required. |
| Write endurance | 1,000,000 erase/write cycles - supports frequent field updates such as metering logs or adaptive tuning values. |
| Data retention | >200 years at 25°C - ensures long-term reliability in unattended infrastructure equipment. |
| Operating temperature | −40°C to +85°C (Industrial grade) - validated for deployment in industrial PLCs, motor drives, and outdoor IoT nodes. |
| Max clock frequency | 3 MHz at VCC ≥ 4.5V - enables sub-100 µs read access and ~5 ms typical write time per word. |
Pinout & Package
Package: SOT-23-6 (6-lead small-outline transistor), Pb-free Matte Tin finish, 1.6 mm × 2.8 mm footprint, 1.1 mm height - suitable for high-density PCB layouts and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DO (Data Out) | Tri-state output delivering read data or Ready/Busy status; requires pull-up for proper high-Z release after CS deassertion. |
| 2 | VSS | Ground reference for all I/O and internal circuitry; must be low-impedance connection to minimize noise coupling during write cycles. |
| 3 | DI (Data In) | Serial input for opcodes, addresses, and write data; sampled on rising CLK edge; not shared with DO in this variant. |
| 4 | CLK | Asynchronous serial clock input; tolerant of stopped-clock conditions; defines timing for all data transfers. |
| 5 | CS | Active-high chip select; initiates instruction decoding on first rising edge after CS high; must remain low ≥250 ns between commands. |
| 6 | VCC | Power supply input; internal power-on reset and voltage detect (VPOR = 1.5V typical) prevent spurious writes during brown-out. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or busy-wait loops - reduces MCU firmware overhead and simplifies driver implementation. |
| Ready/Busy status via DO | Enables non-blocking polling instead of fixed delays - improves system responsiveness and power efficiency during programming. |
| Sequential read mode | Allows continuous burst reads across consecutive addresses with single CS assertion - cuts transaction overhead by ~40% vs. random-access reads. |
| Power-on/off data protection | Hardware-enforced write inhibition below VPOR threshold prevents corruption during power ramp-up/down - critical for fail-safe boot configurations. |
| Pb-free & RoHS compliant | Meets global environmental compliance requirements without derating or special handling - simplifies supply chain qualification and export documentation. |
Applications
| Industrial Sensor Calibration | Embedded Firmware Configuration |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during system initialization and runtime recalibration routines. Use Value: Enables field-upgradable calibration without firmware reflashing; 1M endurance supports lifetime recalibration cycles in maintenance-intensive environments. | Use Scenario: Holding user-defined settings (baud rate, network ID, alarm thresholds) in smart energy meters. IC Role / Device Role / Timing Role: Persistent configuration store interfaced directly to MCU GPIOs with minimal external components. Use Value: SOT-23-6 footprint saves board space versus SOIC-8 alternatives; 2.5V–5.5V VCC range matches meter MCU supply rails without regulators. |
| Motor Drive Parameter Storage | Medical Device Safety Logs |
Use Scenario: Recording operational history (over-temperature events, fault counters) in brushless DC motor controllers. IC Role / Device Role / Timing Role: Event-logging buffer written asynchronously during fault recovery sequences. Use Value: >200-year data retention guarantees audit trail integrity over product lifecycle; sequential write capability optimizes logging throughput. | Use Scenario: Archiving diagnostic timestamps and error codes in portable infusion pumps per IEC 62304 requirements. IC Role / Device Role / Timing Role: Certified nonvolatile memory for safety-critical event logging with deterministic write timing. Use Value: Industrial temperature rating validates operation across clinical environments; hardware write protection prevents accidental erasure during battery swaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC76B-I/SN | SOIC-8 package; same 512×16-bit organization, 2.5–5.5V VCC, −40°C to +85°C rating. | Requires larger PCB area; better thermal dissipation and hand-solderability than SOT-23-6. | Select when board layout allows SOIC-8 and manual rework or thermal stress testing is required. |
| AT25080B-SSHL-T | SPI interface (4-wire), 1 MHz max clock, 8Kbit (1024×8), 1.8–5.5V VCC, same industrial temp range. | Uses SPI protocol instead of Microwire; requires separate SI/SO lines and different driver stack. | Select when existing design uses SPI peripherals and software reuse outweighs pin-count advantage of Microwire 3-wire interface. |
Compared with 93LC76BT-E/OT, the SOIC-8 93LC76B-I/SN offers identical electrical behavior with mechanical trade-offs, while the AT25080B-SSHL-T introduces protocol-level incompatibility but expands voltage flexibility and leverages widely supported SPI infrastructure.
Availability
93LC76BT-E/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded firmware configuration, and motor drive parameter storage requiring stable component supply across extended production lifecycles.
Supply support for 93LC76BT-E/OT 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LC76 series belongs to Microchip's legacy serial EEPROM product line, designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-power nonvolatile storage with minimal external components.
FAQ
What is the memory organization of the 93LC76BT-E/OT?
The 93LC76BT-E/OT is a fixed 512 × 16-bit (8 Kbit) organization device - designated as a 'B' variant. It does not include ORG or PE pins, so word size and write-enable behavior are hardwired, eliminating external configuration logic and simplifying schematic design compared to 'C' versions.
Does the 93LC76BT-E/OT support both 3.3V and 5V operation?
Yes, the 93LC76BT-E/OT operates across a VCC range of 2.5V to 5.5V. This allows direct interfacing with both 3.3V microcontrollers (e.g., PIC16F, SAM D21) and legacy 5V systems without level shifters, while maintaining full AC/DC specifications including 3 MHz max clock at VCC ≥ 4.5V.
How is write protection implemented on the 93LC76BT-E/OT?
The 93LC76BT-E/OT has no Program Enable (PE) pin and no ORG pin - it is a 'B' variant with unconditional write capability. Write protection relies solely on firmware-level EWEN/EWDS command sequencing: the device powers up in EWDS mode, requiring explicit EWEN before any ERASE or WRITE instruction.
What package type is used for the 93LC76BT-E/OT?
The 93LC76BT-E/OT uses a 6-lead SOT-23 package (designated 'OT' in Microchip's packaging code). Its 1.6 mm × 2.8 mm footprint and 1.1 mm height enable high-density placement in space-constrained applications like handheld instruments and modular I/O terminals.
Can the 93LC76BT-E/OT be used in automotive applications?
No - the 93LC76BT-E/OT is rated for Industrial temperature range (−40°C to +85°C), not Automotive (−40°C to +125°C). For automotive use, Microchip specifies the 'E' grade variants such as 93LC76BT-E/ST (TSSOP) or 93LC76CT-E/MS (MSOP), which undergo additional qualification testing per AEC-Q100.
93LC76BT-E/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 512 x 16
- Memory Interface:
- Microwire
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
93LC76BT-E/OT FAQ
1.How can I place an order for 93LC76BT-E/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC76BT-E/OT 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 93LC76BT-E/OT reliable?
The price and inventory of 93LC76BT-E/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC76BT-E/OT is usually 5 days.
3.What payment methods are accepted for 93LC76BT-E/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC76BT-E/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC76BT-E/OT?
93LC76BT-E/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC76BT-E/OT 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 93LC76BT-E/OT?
For technical support, including 93LC76BT-E/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC76BT-E/OT requirements.
6.How does Aetrix verify that 93LC76BT-E/OT is sourced from the original manufacturer or authorized distributors?
All 93LC76BT-E/OT 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 93LC76BT-E/OT meets industry standards.
7.What is the process for return or replacement of 93LC76BT-E/OT?
All 93LC76BT-E/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93LC76BT-E/OT, 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 93LC76BT-E/OT part is unused and in its original packaging.
Return procedure for 93LC76BT-E/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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