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Microchip Technology 93LC86BT-I/OT
- Part No.:
- 93LC86BT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93LC86BT-I/OT.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,972
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Product details
Overview
93LC86BT-I/OT from Microchip Technology Inc. is a 16 Kbit (1024 × 16) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating from 2.5V to 5.5V, rated for industrial temperature (−40°C to +85°C), and housed in a 6-lead SOT-23 package. It supports self-timed erase/write cycles, automatic ERAL before WRAL, and Ready/Busy status via DO pin. Used in microcontroller-based systems for parameter storage, calibration data retention, and configuration memory.
For engineers reviewing the 93LC86BT-I/OT datasheet, 93LC86BT-I/OT pinout, 93LC86BT-I/OT application, or 93LC86BT-I/OT equivalent, key selection criteria include its 16-bit word organization, SOT-23 footprint compatibility, VCC range (2.5–5.5 V), 1M endurance cycles, and support for sequential read and write-all operations without external erase commands.
Technical Context
The 93LC86BT-I/OT implements a synchronous serial Microwire interface with CS, CLK, and DI/DO pins - no ORG or PE pins (as confirmed by Device Selection Table and Pin Function Table). It uses dedicated 16-bit organization ('B' variant), eliminating external logic for word-size selection. All instructions (READ, WRITE, ERASE, ERAL, WRAL, EWEN/EWDS) are clocked on rising CLK edges with defined timing windows per AC specs.
Internally, it features auto-erase-before-write, power-on/off data protection, and a Ready/Busy status signal asserted on DO during programming. The device powers up in EWDS mode and requires explicit EWEN before any erase/write operation - critical for robust firmware-level write protection in embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (1024 × 16-bit words) - fixed x16 organization; 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 - enables frequent field updates in calibration or logging applications. |
| Data retention | 200 years at 25°C - ensures long-term reliability for unpowered storage in industrial equipment. |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - defines maximum SPI-like throughput for configuration reads/writes. |
| Write cycle time | 5 ms typical (TWC) - determines minimum latency between successive write commands. |
| Operating temp | −40°C to +85°C (Industrial grade) - validated for use in non-automotive embedded environments. |
Pinout & Package
6-lead SOT-23 package (package code 'OT' per Device Selection Table and Package Marking Information). Pinout matches standard SOT-23 layout: Pin 1 = DO, Pin 2 = VSS, Pin 3 = DI, Pin 4 = CLK, Pin 5 = CS, Pin 6 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal logic. |
| CLK | Serial Clock | Rising-edge synchronized I/O; clocking stops during self-timed write cycles. |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; tied high with CS for Start detection. |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge. |
| VSS | Ground | Reference for all I/O and internal circuitry; must be connected before VCC. |
| VCC | Power Supply | 2.5–5.5 V supply; voltage detect threshold is 1.5 V (POR activation). |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control - simplifies host firmware and reduces CPU overhead. |
| Automatic ERAL before WRAL | Guarantees full-array readiness before bulk write - prevents partial writes and data corruption. |
| Ready/Busy status on DO | Enables polling-based write completion detection without interrupt or timer dependencies. |
| Power-on/off data protection | Hardware-level lockout below 1.5 V VCC - prevents inadvertent writes during brown-out or power ramp. |
| EWEN/EWDS command set | Software-controlled write-enable/disable - allows fine-grained protection of specific update sequences. |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients in programmable logic controllers (PLCs) and process transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed at boot and during field recalibration; 5 ms write latency acceptable due to infrequent updates. Use Value: Enables traceable, field-updatable calibration without requiring reprogramming of main MCU firmware or external flash. | Use Scenario: Holding user-defined I/O mapping, communication protocol settings, and alarm thresholds in HVAC controllers. IC Role / Device Role / Timing Role: Serial configuration store interfaced directly to MCU GPIOs; uses sequential read for fast parameter loading at startup. Use Value: Reduces BOM count by replacing discrete resistors/DIP switches; supports remote configuration via service port. |
| Medical Device Settings Storage | Consumer Appliance State Memory |
Use Scenario: Retaining therapy parameters (e.g., pressure levels, ramp times) in portable CPAP machines across power cycles. IC Role / Device Role / Timing Role: Low-power EEPROM accessed only during setup or mode changes; operates reliably at 3.3 V from battery-backed supply. Use Value: Meets IEC 62304 data integrity requirements with 200-year retention and 1M-cycle endurance. | Use Scenario: Saving last-used cooking mode, timer values, and child-lock state in smart microwaves and ovens. IC Role / Device Role / Timing Role: Standby-current-optimized (1 µA max) memory that retains state during standby; accessed via simple GPIO-banged Microwire. Use Value: Eliminates need for supercapacitor backup; supports energy-efficient always-on UX features. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86B-I/SN | Same 1024×16 organization, 2.5–5.5 V, but in 8-lead SOIC (SN) package - larger footprint, higher thermal mass. | Suitable for through-hole or larger PCBs where SOT-23 density is unnecessary; better heat dissipation in high-ambient environments. | Select when board space permits larger package and manual assembly or rework is preferred. |
| AT25128B-SSHL-T | 128 Kbit SPI EEPROM (16K × 8), 1.8–5.5 V, 20 MHz SPI interface - faster, higher density, different protocol. | Requires SPI peripheral instead of GPIO-banged Microwire; not drop-in compatible due to command set and pinout differences. | Choose for higher bandwidth or capacity needs, provided MCU supports SPI and firmware can be updated for new protocol. |
Compared with 93LC86B-I/SN, the 93LC86BT-I/OT offers identical electrical behavior and instruction set but saves >60% board area; versus AT25128B-SSHL-T, it trades speed and density for protocol simplicity and lower gate-count MCU implementation.
Availability
93LC86BT-I/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and medical device settings storage requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 93LC86BT-I/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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93LCxx series was designed specifically for cost-sensitive, low-power embedded systems needing reliable, small-footprint serial EEPROM - emphasizing ease of integration, robust write protection, and extended data retention without external components.
FAQ
What is the memory organization of the 93LC86BT-I/OT?
The 93LC86BT-I/OT is a dedicated 16-bit organization device ('B' version), providing 1024 words × 16 bits = 16 Kbit total capacity. Unlike 'C' variants, it has no ORG pin - word size is fixed and requires no external configuration. This is confirmed in the Device Selection Table and Functional Description section of DS21797L.
Does the 93LC86BT-I/OT have a Program Enable (PE) pin?
No, the 93LC86BT-I/OT does not include a PE pin. Per the Device Selection Table and Pin Function Table, PE is only present on 'C' versions (e.g., 93LC86C). The 93LC86BT-I/OT relies solely on EWEN/EWDS commands for write protection - a design choice that simplifies routing in space-constrained SOT-23 layouts.
What is the maximum clock frequency supported by the 93LC86BT-I/OT?
The 93LC86BT-I/OT supports up to 3 MHz clock frequency when VCC is 4.5 V to 5.5 V, 2 MHz at 2.5 V to 4.5 V, and 1 MHz at 1.8 V to 2.5 V. Since the 93LC86BT-I/OT's minimum VCC is 2.5 V, its operational max is 2 MHz under typical 3.3 V supply - verified in Table 1-2 (AC Characteristics) of DS21797L.
How is write protection implemented on the 93LC86BT-I/OT?
Write protection on the 93LC86BT-I/OT is implemented exclusively via firmware commands: Erase/Write Enable (EWEN) and Erase/Write Disable (EWDS). The device powers up in EWDS mode, blocking all erase/write operations until EWEN is issued. This eliminates need for hardware pins like PE, making the 93LC86BT-I/OT ideal for designs where pin count and layout simplicity are critical.
Is the 93LC86BT-I/OT compatible with standard Microwire interfaces?
Yes, the 93LC86BT-I/OT is fully Microwire-compatible, using a 3-wire synchronous serial interface (CS, CLK, DI/DO) with start-bit detection, opcode-based instruction set, and rising-edge clocking. Its timing parameters (e.g., TCKH, TCSL, TPD) align with Microwire specifications, and it supports all core Microwire functions: READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS - as documented in Tables 1-3/1-4 and Section 2.0.
93LC86BT-I/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:
- 16Kbit
- Memory Organization:
- 1K 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
93LC86BT-I/OT FAQ
1.How can I place an order for 93LC86BT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC86BT-I/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 93LC86BT-I/OT reliable?
The price and inventory of 93LC86BT-I/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC86BT-I/OT is usually 5 days.
3.What payment methods are accepted for 93LC86BT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC86BT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC86BT-I/OT?
93LC86BT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC86BT-I/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 93LC86BT-I/OT?
For technical support, including 93LC86BT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC86BT-I/OT requirements.
6.How does Aetrix verify that 93LC86BT-I/OT is sourced from the original manufacturer or authorized distributors?
All 93LC86BT-I/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 93LC86BT-I/OT meets industry standards.
7.What is the process for return or replacement of 93LC86BT-I/OT?
All 93LC86BT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93LC86BT-I/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 93LC86BT-I/OT part is unused and in its original packaging.
Return procedure for 93LC86BT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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