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Microchip Technology 93C86C-I/MS
- Part No.:
- 93C86C-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93C86C-I/MS.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:722
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Product details
Overview
93C86C-I/MS from Microchip Technology Inc. is a 16 Kbit Microwire-compatible serial EEPROM with user-selectable 8-bit or 16-bit word organization via the ORG pin, 4.5–5.5 V supply range, industrial temperature rating (–40°C to +85°C), and integrated Program Enable (PE) pin for hardware write protection. It serves as nonvolatile configuration storage in embedded controllers requiring low-power, reliable data retention.
For engineers reviewing the 93C86C-I/MS datasheet, 93C86C-I/MS pinout, 93C86C-I/MS application, or 93C86C-I/MS equivalent, key selection criteria include ORG-configurable word size, PE-enabled hardware write lockout, self-timed erase/write cycles, Ready/Busy status signaling via DO, and MSOP-8 packaging for space-constrained PCB layouts.
Technical Context
The 93C86C-I/MS implements a synchronous 3-wire Microwire interface (CS, CLK, DI/DO) with start-bit detection and opcode-driven command execution. Its dual-word-size architecture relies on external logic level applied to the ORG pin-VCC selects x16 (1024 × 16), VSS selects x8 (2048 × 8)-and requires PE = VCC to enable programming.
It supports full-cycle commands including ERAL (6 ms), WRAL (15 ms), and individual WRITE (2 ms), all featuring automatic pre-erase and status polling via DO. Power-on reset circuitry inhibits operation below 3.8 V, and EWEN/EWDS instructions provide software-level write control independent of PE state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 16 Kbit (2048 × 8 or 1024 × 16, selectable via ORG pin) |
| Supply Voltage | 4.5–5.5 V - ensures compatibility with 5 V logic systems and rejects brownout below 3.8 V |
| Write Cycle Time | 2 ms - self-timed erase-and-write per address; no external timing control required |
| Endurance | 1,000,000 write/erase cycles - supports frequent field updates in calibration or logging applications |
| Data Retention | 200 years - guarantees long-term integrity without refresh in battery-backed or infrequently powered systems |
| Interface | Microwire 3-wire serial (CS, CLK, DI/DO) - minimal GPIO usage, compatible with legacy microcontroller peripherals |
| Temperature Range | –40°C to +85°C (Industrial) - validated for use in industrial controls and automotive body electronics |
Pinout & Package
8-pin MSOP package (3.0 mm × 4.9 mm, 0.65 mm pitch), RoHS-compliant matte tin finish, with exposed pad optional for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; device enters Standby mode when low, but completes ongoing write cycles |
| CLK | Serial Clock | Synchronizes all data transfers on rising edge; clock-stoppable during instruction framing |
| DI | Data Input | Accepts Start bit, opcodes, addresses, and write data; must be stable before CS high |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); tri-states on CS falling edge |
| VSS | Ground | Reference for all I/O and internal logic; must be low-impedance connection |
| ORG | Organization Control | Logic-high → x16 mode (1024 × 16); logic-low → x8 mode (2048 × 8); must be fixed at power-up |
| PE | Program Enable | Hardware write gate: PE = VCC enables programming; PE = VSS blocks all writes regardless of EWEN |
| VCC | Power Supply | 4.5–5.5 V input; internal POR circuit disables operations below 3.8 V |
Key Features
| Feature | Design Value |
|---|---|
| ORG-selectable memory organization | Enables single BOM support for both 8-bit and 16-bit host data paths without firmware change |
| Dual-layer write protection (PE + EWEN/EWDS) | Prevents accidental writes via hardware (PE) and software (EWEN) - critical for field-upgradable firmware tables |
| Self-timed ERAL and WRAL commands | Eliminates need for external timeout logic; WRAL includes auto-ERAL, reducing host CPU overhead |
| Ready/Busy status on DO pin | Allows polling-based flow control without dedicated interrupt lines or additional GPIO |
| Power-on/off data protection | Hardware POR circuit blocks writes during voltage ramp-up/down - prevents corruption during power cycling |
Applications
| Industrial Sensor Calibration | Automotive Body Control Module |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and runtime calibration updates in pressure or temperature transducers. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-up and periodic recalibration routines. Use Value: ORG pin allows reuse across 8-bit microcontrollers (x8 mode) and 16-bit DSPs (x16 mode); 200-year retention ensures lifetime accuracy without backup power. | Use Scenario: Holding door lock actuator profiles, mirror position presets, and lighting dimming curves in vehicle interior modules. IC Role / Device Role / Timing Role: Microwire-configured parameter store interfaced to 8-bit MCU with limited SPI resources. Use Value: PE pin provides fail-safe hardware lock during CAN message processing; 1M endurance supports dealer reprogramming over vehicle lifetime. |
| Medical Infusion Pump Settings | Network Equipment Boot Configuration |
Use Scenario: Securing drug library parameters, dose limits, and user-access permissions in Class II medical devices. IC Role / Device Role / Timing Role: Tamper-resistant settings storage with dual write-protection (PE + EWEN) verified at boot. Use Value: Industrial temp rating ensures reliability inside sealed enclosures; 4.5–5.5 V range matches isolated 5 V rails in safety-critical power domains. | Use Scenario: Storing MAC address, PHY initialization sequences, and firmware version flags in Ethernet switches and routers. IC Role / Device Role / Timing Role: Serial EEPROM mapped into boot ROM space for early-stage configuration loading. Use Value: WRAL command enables atomic factory provisioning of full configuration set; sequential read accelerates boot-time parameter fetch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86C-I/MS | 2.5–5.5 V supply range; lacks VCC brownout threshold of 3.8 V; same pinout and instruction set | Supports wider voltage range including 3.3 V systems; not suitable where strict 5 V-only operation is required | Select for mixed-voltage designs needing backward compatibility with 3.3 V logic while retaining ORG/PE functionality |
| AT25160B-MAHL-T | SPI interface (4-wire), 1.8–5.5 V, no ORG/PE pins; 20 MHz max clock vs. 3 MHz Microwire | Requires SPI peripheral instead of generic GPIO-bitbanged Microwire; no hardware write-enable pin | Choose when higher throughput or SPI-native host architecture exists, and hardware write lock is managed in firmware |
Compared with 93LC86C-I/MS, the 93C86C-I/MS offers tighter VCC tolerance and guaranteed operation only above 4.5 V - ideal for legacy 5 V systems where noise immunity and voltage margin are prioritized over flexibility. Versus AT25160B-MAHL-T, it trades SPI speed for deterministic Microwire timing and built-in PE-based hardware security.
Availability
93C86C-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive body control modules, medical infusion pump settings, and network equipment boot configuration requiring stable component supply across extended production lifecycles.
Supply support for 93C86C-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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing infrastructure.
The 93Cxx series targets cost-sensitive, low-power embedded systems requiring robust serial EEPROM with configurable word size and hardware write protection - optimized for industrial, automotive, and medical applications demanding long-term data integrity.
FAQ
What is the function of the ORG pin on the 93C86C-I/MS?
The ORG pin on the 93C86C-I/MS determines memory word size: tied to VCC, it configures the device as 1024 × 16-bit (x16); tied to VSS, it configures as 2048 × 8-bit (x8). This pin must be held at a valid logic level during power-up and remains static during operation - it is not dynamically switchable. The 93C86C-I/MS is the only variant in the 93C86 family with ORG functionality.
How does the Program Enable (PE) pin protect memory on the 93C86C-I/MS?
The PE pin on the 93C86C-I/MS acts as a hardware gate for all write operations: only when PE = VCC can ERASE, WRITE, ERAL, or WRAL commands execute - even if EWEN has been issued. If PE = VSS, all programming is blocked regardless of software state. This provides fail-safe protection against firmware bugs or voltage glitches that might otherwise corrupt memory.
What is the minimum VCC required for reliable operation of the 93C86C-I/MS?
The 93C86C-I/MS requires VCC ≥ 4.5 V for specification compliance and includes internal power-on reset circuitry that inhibits all operations below approximately 3.8 V. Unlike the 93AA86C or 93LC86C variants, the 93C86C-I/MS is not rated for operation below 4.5 V - attempting to use it at 3.3 V will result in undefined behavior and potential data corruption.
Can the 93C86C-I/MS be used in a 3.3 V system?
No, the 93C86C-I/MS is specified only for 4.5–5.5 V operation and is incompatible with 3.3 V systems. Its absolute minimum functional VCC is 4.5 V, and its POR threshold is 3.8 V. For 3.3 V designs, consider the functionally identical 93LC86C-I/MS (2.5–5.5 V) or 93AA86C-I/MS (1.8–5.5 V), both of which retain ORG and PE functionality and share the same MSOP-8 footprint.
What is the purpose of the Ready/Busy signal on the DO pin of the 93C86C-I/MS?
The DO pin of the 93C86C-I/MS doubles as a Ready/Busy status indicator during erase and write operations: when CS is asserted after TCSL ≥ 250 ns, DO = low indicates an active programming cycle, and DO = high signals completion. This enables polling-based host synchronization without interrupts or timers - essential for resource-constrained microcontrollers interfacing via bit-banged Microwire.
93C86C-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:
- 2K x 8, 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
93C86C-I/MS FAQ
1.How can I place an order for 93C86C-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C86C-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 93C86C-I/MS reliable?
The price and inventory of 93C86C-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 93C86C-I/MS is usually 5 days.
3.What payment methods are accepted for 93C86C-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C86C-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C86C-I/MS?
93C86C-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C86C-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 93C86C-I/MS?
For technical support, including 93C86C-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C86C-I/MS requirements.
6.How does Aetrix verify that 93C86C-I/MS is sourced from the original manufacturer or authorized distributors?
All 93C86C-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 93C86C-I/MS meets industry standards.
7.What is the process for return or replacement of 93C86C-I/MS?
All 93C86C-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C86C-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 93C86C-I/MS part is unused and in its original packaging.
Return procedure for 93C86C-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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