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Microchip Technology 93LC86BT-I/SN
- Part No.:
- 93LC86BT-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93LC86BT-I/SN.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,300
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Product details
Overview
93LC86BT-I/SN from Microchip Technology Inc. is a 16 Kbit (2048 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, operating across 2.5–5.5 V, rated for Industrial temperature (−40°C to +85°C), and housed in an 8-lead SOIC package (SN). It supports self-timed erase/write cycles, automatic ERAL/WRAL, and Ready/Busy status via DO pin - used for firmware parameter storage in microcontroller-based embedded systems.
For engineers reviewing the 93LC86BT-I/SN datasheet, 93LC86BT-I/SN pinout, 93LC86BT-I/SN application, or 93LC86BT-I/SN equivalent, key selection criteria include voltage range compatibility (2.5–5.5 V), 8-bit organization (no ORG pin), absence of PE/ORG pins, industrial temp rating, and SOIC-8 packaging for legacy board compatibility.
Technical Context
The 93LC86BT-I/SN implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals. It uses a dedicated 8-bit memory organization ('A' variant), eliminating need for ORG pin configuration or Program Enable (PE) control - unlike 'C' variants. All instructions (READ, WRITE, ERASE, EWEN/EWDS, ERAL/WRAL) are clocked on rising CLK edges with strict timing windows (e.g., TCKH ≥250 ns at 2.5–4.5 V).
Internal logic enforces power-on data protection: write operations are inhibited below VCC = 1.5 V, and device powers up in EWDS mode requiring explicit EWEN before programming. The DO pin serves dual role - serial data output during READ and Ready/Busy status indicator during erase/write, with status valid after minimum TCSL (250 ns) and detectable via polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8-bit) - fixed x8 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 - ensures long-term reliability in frequent update applications. |
| Data retention | 200 years at 25°C - suitable for permanent configuration storage without refresh. |
| Write cycle time | 5 ms max (TWC) - self-timed; no external delay needed between commands. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage, compatible with legacy MCU peripherals. |
| Temp range | −40°C to +85°C (Industrial grade) - validated for extended operation in non-automotive embedded environments. |
Pinout & Package
8-lead SOIC package (SN), 3.9 mm × 4.9 mm body, 1.27 mm pitch, RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby mode. |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence. |
| DI | Data Input | Receives Start bit, instruction opcodes, addresses, and write data; requires stable setup/hold times. |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z when CS low or not reading. |
| VSS | Ground | Reference return path for all digital and analog functions; must be low-impedance. |
| VCC | Power Supply | 2.5–5.5 V supply; internal POR circuit triggers at ~1.5 V to prevent partial writes. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing control; 5 ms max cycle time ensures deterministic firmware update latency. |
| Automatic ERAL before WRAL | Guarantees full-array erase prior to bulk write - prevents stale data corruption without software intervention. |
| Power-On/Off Data Protection | Hardware-enforced write inhibition below 1.5 V VCC - prevents inadvertent writes during brown-out or power ramp. |
| Ready/Busy Status via DO | Enables efficient polling instead of fixed delays; reduces CPU wait time and improves system responsiveness. |
| Sequential Read Mode | Allows continuous address increment with single CS assertion - optimizes bulk parameter dump speed. |
Applications
| Industrial Sensor Calibration | Consumer Appliance Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offsets and gain coefficients in HVAC controllers and pressure transmitters. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed at boot and during field recalibration; operates at 100 kHz–3 MHz clock rates. Use Value: Ensures measurement accuracy across product lifetime without battery-backed RAM or external supervision. | Use Scenario: Retaining user preferences (e.g., cooking modes, timer settings) in microwave ovens and washing machines. IC Role / Device Role / Timing Role: Low-power configuration store interfaced to 8-bit MCU; active only during menu navigation or power-up. Use Value: Maintains settings through AC power cycles and supports >1M write cycles for daily user interaction. |
| Medical Device Settings | Industrial PLC I/O Mapping |
Use Scenario: Saving therapy parameters and alarm thresholds in portable infusion pumps and blood glucose meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage accessed via isolated MCU SPI/Microwire peripheral; validated for IEC 60601 environments. Use Value: Meets medical data integrity requirements with 200-year retention and hardware write-protection on power loss. | Use Scenario: Storing module identification, channel scaling factors, and diagnostic history in modular I/O backplanes. IC Role / Device Role / Timing Role: Field-upgradable configuration hub; communicates over slow-speed industrial bus with robust noise immunity. Use Value: Enables hot-swap reconfiguration without firmware reload; supports traceability and calibration certificate storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86A-I/SN | Identical pinout, specs, and marking; 'T' suffix denotes tape-and-reel packaging - same die and SOIC-8 footprint. | No functional difference; 'T' indicates reel delivery for SMT production; 'I/SN' denotes Industrial temp + SOIC package. | Select 93LC86BT-I/SN for verified tape-and-reel availability; both share identical electrical behavior and qualification. |
| AT25020B-MAHL-T | 2 K × 8-bit SPI EEPROM (16 Kbit), 1.8–5.5 V, SOIC-8, but uses SPI (4-wire) interface - requires CS, CLK, SI, SO, no DO dual-role. | Lacks Ready/Busy polling via DO; requires separate status register read or fixed delays; higher pin count in system-level interface. | Choose only if migrating to SPI ecosystem; not drop-in - firmware and layout changes required due to protocol and pin function mismatch. |
Compared with 93LC86A-I/SN, the 93LC86BT-I/SN offers identical functionality with optimized logistics packaging; versus AT25020B-MAHL-T, it preserves Microwire compatibility and DO-based status polling - critical for resource-constrained 8-bit MCUs lacking SPI status registers.
Availability
93LC86BT-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, consumer appliance configuration, and medical device settings requiring stable component supply, long-term obsolescence management, and RoHS-compliant SOIC packaging.
Supply support for 93LC86BT-I/SN 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 93LC86BT-I/SN belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with minimal pin count and proven Microwire interoperability.
FAQ
What is the memory organization of the 93LC86BT-I/SN?
The 93LC86BT-I/SN is an 'A'-variant device with fixed 2048 × 8-bit (16 Kbit) organization. It does not include ORG or PE pins - unlike 'C' variants - and requires no external configuration for word size selection. This simplifies PCB layout and firmware initialization compared to configurable versions.
Does the 93LC86BT-I/SN support 3.3 V operation?
Yes, the 93LC86BT-I/SN fully supports 3.3 V operation within its specified VCC range of 2.5 V to 5.5 V. Electrical characteristics including FCLK (up to 2 MHz at 2.5–4.5 V), VOL (≤0.2 V at 100 µA), and ICC read (≤1 µA at 2.5 V) are guaranteed across this range, making it suitable for modern 3.3 V embedded designs.
How is write protection implemented on the 93LC86BT-I/SN?
The 93LC86BT-I/SN uses command-based write protection: it powers up in EWDS (Erase/Write Disable) mode, and all erase/write operations require a preceding EWEN (Erase/Write Enable) instruction. No hardware PE pin is present - protection is purely software-controlled via instruction sequence, ensuring flexibility without external components.
What is the purpose of the DO pin during programming cycles?
During erase or write cycles, the DO pin of the 93LC86BT-I/SN outputs Ready/Busy status: logic low indicates ongoing programming, and logic high confirms completion. This allows firmware to poll DO (after meeting TCSL ≥250 ns) instead of using fixed delays - improving real-time responsiveness and reducing CPU idle time in time-critical applications.
Is the 93LC86BT-I/SN pin-compatible with other 93XX86 variants in SOIC-8?
Yes, the 93LC86BT-I/SN shares identical SOIC-8 pinout (SN package) with all 93XX86A/B/C variants in PDIP/SOIC/TSSOP/MSOP footprints. However, 'B' and 'C' variants expose ORG and/or PE pins on pins 6 and 7 - unused and NC on the 93LC86BT-I/SN - so PCBs designed for 'A' variants remain fully compatible without modification.
93LC86BT-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
93LC86BT-I/SN FAQ
1.How can I place an order for 93LC86BT-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC86BT-I/SN 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/SN reliable?
The price and inventory of 93LC86BT-I/SN 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/SN is usually 5 days.
3.What payment methods are accepted for 93LC86BT-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC86BT-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC86BT-I/SN?
93LC86BT-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC86BT-I/SN 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/SN?
For technical support, including 93LC86BT-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC86BT-I/SN requirements.
6.How does Aetrix verify that 93LC86BT-I/SN is sourced from the original manufacturer or authorized distributors?
All 93LC86BT-I/SN 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/SN meets industry standards.
7.What is the process for return or replacement of 93LC86BT-I/SN?
All 93LC86BT-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93LC86BT-I/SN, 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/SN part is unused and in its original packaging.
Return procedure for 93LC86BT-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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