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Microchip Technology 93C86B-I/MS
- Part No.:
- 93C86B-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93C86B-I/MS.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,611
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Product details
Overview
93C86B-I/MS from Microchip Technology Inc. is a 16K-bit, 1024 × 16-bit organization serial EEPROM with Microwire-compatible 3-wire interface, designed for nonvolatile data storage in embedded control and instrumentation systems. It operates at 4.5–5.5 V, supports Industrial temperature range (−40°C to +85°C), features self-timed erase/write cycles (2 ms), and delivers 1,000,000 endurance cycles with >200-year data retention.
For engineers reviewing the 93C86B-I/MS datasheet, 93C86B-I/MS pinout, 93C86B-I/MS application, or 93C86B-I/MS equivalent, key selection considerations include its fixed 16-bit word size, absence of ORG and PE pins, industrial-grade reliability, and compatibility with legacy Microwire controllers in space-constrained MSOP-8 designs.
Technical Context
The 93C86B-I/MS implements a synchronous serial interface using CS, CLK, and DI/DO signals, with instruction decoding and address latching synchronized to the rising edge of CLK. Its memory array is organized as 1024 words × 16 bits, requiring 10-bit addressing and supporting READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS commands.
Power-on data protection is enforced via internal voltage detection (VPOR = 3.8 V), disabling all operations below threshold. Ready/Busy status is reported on DO during programming, enabling polling-based flow control without external timing dependencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (1024 × 16-bit organization) |
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with 5 V logic systems and rejects brown-out operation |
| Temp Range | −40°C to +85°C (Industrial) - validated for use in industrial control panels and automotive body modules |
| Write Cycle Time | 2 ms - enables fast firmware parameter updates without blocking host MCU execution |
| Endurance | 1,000,000 erase/write cycles - supports daily configuration logging over 27 years |
| Data Retention | >200 years at 25°C - guarantees long-term calibration data integrity in unpowered storage |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy PIC® and 8051 microcontrollers |
Pinout & Package
8-pin MSOP package (3.0 mm × 4.9 mm, 0.65 mm pitch), Pb-free matte tin finish, rated for Industrial temperature range. Pin 1 marked by laser dot; exposed pad optional (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal state |
| 2 CLK | Serial Clock | Rising-edge synchronized I/O; clocking may pause mid-transfer without corruption |
| 3 DI | Data Input | Accepts Start bit, opcode, address, and write data; no pull-up required |
| 4 DO | Data Output / Status | Tri-state output; provides read data or Ready/Busy (low = busy) during programming |
| 5 VSS | Ground | Reference return path for all digital and analog circuitry; must be low-impedance |
| 6 - | No Connect | Not bonded; left floating per MSOP-8 pinout for 93C86B (ORG/PE absent) |
| 7 - | No Connect | Not bonded; left floating per MSOP-8 pinout for 93C86B (ORG/PE absent) |
| 8 VCC | Power Supply | 4.5–5.5 V input; internal POR circuit disables writes below 3.8 V |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 16-bit word organization | Eliminates external ORG pin routing and simplifies PCB layout for x16-only applications |
| Self-timed 2 ms write cycle | Removes need for external timing components or software delays during EEPROM programming |
| Ready/Busy status on DO pin | Enables efficient polling-based host firmware without dedicated interrupt lines or timers |
| Automatic ERAL before WRAL | Guarantees full-array write success without separate erase command in boot-loader implementations |
| Power-on/off data protection | Prevents partial writes during power ramp-up/down, ensuring EEPROM contents remain valid |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients in pressure or temperature transducers. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed once at power-up; requires guaranteed data integrity over 15+ years. Use Value: Eliminates need for external trimming potentiometers or costly laser calibration; supports field recalibration via service tool. | Use Scenario: Holding door lock actuator position profiles and window auto-reverse thresholds in BCM firmware. IC Role / Device Role / Timing Role: Parameter storage updated infrequently (<10×/day); must survive vehicle battery disconnect events. Use Value: Enables adaptive learning behavior without MCU flash wear; withstands 1M+ cycles across vehicle lifetime. |
| Medical Infusion Pump Settings | Smart Energy Meter Firmware Patch Storage |
Use Scenario: Retaining drug library definitions, alarm thresholds, and user preferences across power cycles. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for safety-critical parameters; accessed only during initialization. Use Value: Meets IEC 62304 Class C requirements for data persistence; >200-year retention exceeds product lifecycle. | Use Scenario: Storing OTA firmware patch payloads and version metadata prior to MCU flash update. IC Role / Device Role / Timing Role: High-reliability buffer memory for critical update data; must survive repeated power loss during download. Use Value: Prevents bricking during interrupted updates; 2 ms write time enables rapid patch staging without MCU stall. |
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/MS | Wider VCC range (2.5–5.5 V); same 1024 × 16-bit organization and MSOP-8 package | Supports dual-voltage systems (e.g., 3.3 V MCU + 5 V peripherals); not suitable for 5 V-only designs requiring tighter VPOR margin | Select when system VCC may dip below 4.5 V or when mixed-voltage design mandates broader supply tolerance |
| AT25128B-MAHL-T | SPI interface (4-wire), 128 Kbit capacity, 2.5–5.5 V operation, SO8 package | Higher density and faster SPI clock (20 MHz); incompatible pinout and protocol - requires firmware rework | Choose for new designs needing larger storage or higher throughput; not drop-in for existing Microwire layouts |
Compared with 93LC86B-I/MS, the 93C86B-I/MS offers stricter 4.5–5.5 V operation ideal for stable 5 V rails, while AT25128B-MAHL-T provides SPI speed and density at the cost of interface redesign - making 93C86B-I/MS optimal for legacy Microwire-based industrial upgrades.
Availability
93C86B-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, and medical infusion pump settings requiring stable component supply, long-term data integrity, and RoHS-compliant packaging.
Supply support for 93C86B-I/MS 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, analog, and Flash-IP solutions, serving industrial, automotive, and consumer markets with high-reliability semiconductor products.
The 93Cxx series was engineered specifically for cost-sensitive, space-constrained embedded systems requiring robust nonvolatile memory with minimal external components and proven field reliability.
FAQ
What is the memory organization of the 93C86B-I/MS?
The 93C86B-I/MS has a fixed 1024 × 16-bit (16 Kbit) organization. Unlike 'C' variants, it lacks an ORG pin and is hardwired for 16-bit word access. This eliminates configuration uncertainty and simplifies interface logic in x16-centric systems such as motor control registers or display LUT storage.
Does the 93C86B-I/MS support the ORG or PE pin functions?
No. The 93C86B-I/MS does not include ORG or PE pins - these are exclusive to 'C' variants (e.g., 93C86C). As a 'B' device, it operates with permanent 16-bit organization and always-enabled programming, requiring external hardware or firmware write-protection if needed.
What is the maximum clock frequency supported by the 93C86B-I/MS?
The 93C86B-I/MS supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V. This allows high-speed parameter reads during system boot while maintaining timing margins for reliable operation across the full Industrial temperature range.
How does the Ready/Busy status work on the 93C86B-I/MS DO pin?
During erase or write operations, the DO pin outputs Ready/Busy status: logic low indicates ongoing programming, logic high signals completion. Status is only valid after CS is brought high for ≥250 ns post-command; DO returns to High-Z when CS is low.
Is the 93C86B-I/MS pin-compatible with other 93XX86 variants in MSOP-8 package?
Yes - the 93C86B-I/MS shares identical MSOP-8 pinout with 93AA86A/B, 93LC86A/B, and 93C86A devices. Pins 1–5 and 8 are functionally identical; pins 6 and 7 are NC on all 'A' and 'B' variants, enabling direct PCB footprint reuse across the family.
93C86B-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not 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:
- 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-MSOP
93C86B-I/MS FAQ
1.How can I place an order for 93C86B-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C86B-I/MS 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 93C86B-I/MS reliable?
The price and inventory of 93C86B-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C86B-I/MS is usually 5 days.
3.What payment methods are accepted for 93C86B-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C86B-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C86B-I/MS?
93C86B-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C86B-I/MS 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 93C86B-I/MS?
For technical support, including 93C86B-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C86B-I/MS requirements.
6.How does Aetrix verify that 93C86B-I/MS is sourced from the original manufacturer or authorized distributors?
All 93C86B-I/MS 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 93C86B-I/MS meets industry standards.
7.What is the process for return or replacement of 93C86B-I/MS?
All 93C86B-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C86B-I/MS, 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 93C86B-I/MS part is unused and in its original packaging.
Return procedure for 93C86B-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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