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Microchip Technology 93C86A-I/MS
- Part No.:
- 93C86A-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93C86A-I/MS.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,737
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Product details
Overview
The 93C86A-I/MS from Microchip Technology Inc. is a 16 Kbit (2048 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 4.5–5.5 V supply range, industrial temperature rating (–40°C to +85°C), and MSOP-8 package. It delivers 1 million erase/write cycles, >200-year data retention, and integrated power-on/off data protection - used in embedded system configuration storage, sensor calibration memory, and firmware parameter backup.
For engineers reviewing the 93C86A-I/MS datasheet, 93C86A-I/MS pinout, 93C86A-I/MS application, or 93C86A-I/MS equivalent, key selection considerations include its fixed 8-bit organization (no ORG pin), absence of PE/ORG pins, guaranteed 2 ms write cycle time at 4.5–5.5 V, and compatibility with legacy Microwire controllers requiring CS/CLK/DI/DO timing compliance.
Technical Context
This device implements a synchronous serial Microwire protocol with start-bit detection, opcode-driven instruction set (READ, WRITE, ERASE, ERAL, WRAL, EWEN/EWDS), and Ready/Busy status reporting via DO pin. All operations are self-timed with automatic erase-before-write and full-array erase/write support.
It uses CMOS technology with internal voltage detection (VPOR = 3.8 V) to inhibit all operations below VCC threshold, and features dedicated chip select (CS) with 250 ns minimum low-time requirement between instructions. No external logic is needed for word-size configuration - unlike C-versions, the 'A' variant fixes 8-bit organization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8-bit) - fixed x8 organization; no ORG pin required |
| VCC range | 4.5 V to 5.5 V - supports standard 5 V systems only; no low-voltage operation |
| Write cycle time | 2 ms max - enables deterministic timing for host firmware polling or timeout handling |
| Endurance | 1,000,000 erase/write cycles - validated at 25°C, 5.0 V; suitable for frequent field updates |
| Data retention | >200 years - ensures long-term reliability in unpowered storage applications |
| Interface | Microwire 3-wire serial (CS/CLK/DI/DO) - compatible with legacy microcontrollers lacking SPI hardware |
| Temp range | –40°C to +85°C (Industrial) - qualified for industrial control, metering, and automotive body electronics |
Pinout & Package
8-pin MSOP (150 mil) package with exposed pad (optional VSS connection), Pb-free Matte Tin finish, and standard pinout matching SOIC/TSSOP footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions to reset internal state |
| CLK | Serial Clock | Positive-edge synchronized I/O; clock can be paused mid-transfer without corruption |
| DI | Data Input | Accepts start bit, opcode, address, and write data; high-impedance when not selected |
| 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; exposed pad may be tied to VSS for thermal performance |
| VCC | Power Supply | 4.5–5.5 V only; internal POR circuit blocks operation below 3.8 V |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for host-controlled timing delays; 2 ms max cycle guarantees predictable latency |
| Automatic ERAL before WRAL | Ensures full-array write integrity without separate erase command - simplifies firmware logic |
| Power-on/off data protection | Hardware-level inhibition below 3.8 V prevents partial writes during brown-out or power ramp |
| Ready/Busy status on DO | Enables efficient polling instead of fixed delays; reduces CPU overhead in resource-constrained systems |
| Sequential read mode | Allows continuous address increment with single CS assertion - speeds up bulk read operations |
Applications
| Industrial Sensor Calibration | Embedded System Configuration |
|---|---|
Use Scenario: Storing factory-calibrated coefficients and offset values for temperature, pressure, and humidity sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter storage with infrequent writes and frequent reads; accessed during sensor initialization and periodic self-test. Use Value: Guarantees coefficient persistence across power cycles and supports field recalibration with 1M-cycle endurance. | Use Scenario: Holding boot configuration flags, network settings, and user preferences in HVAC controllers and smart meters. IC Role / Device Role / Timing Role: Serial configuration memory interfaced to MCU GPIO or Microwire peripheral; written at setup and read at power-up. Use Value: Enables zero-touch deployment and remote parameter updates without firmware reflash. |
| Firmware Parameter Backup | Automotive Body Control Module |
Use Scenario: Backing up runtime-modified firmware parameters (e.g., motor tuning gains, fault thresholds) in motor drives and UPS systems. IC Role / Device Role / Timing Role: Secondary nonvolatile storage synchronized with main MCU flash writes; accessed during safe shutdown or error recovery. Use Value: Prevents loss of adaptive tuning data during unexpected power loss, improving system resilience. | Use Scenario: Storing seat position memory, mirror presets, and lighting profiles in automotive interior modules. IC Role / Device Role / Timing Role: Low-pin-count EEPROM interfaced to 8-bit or 16-bit automotive MCUs; operates across –40°C to +85°C ambient. Use Value: Meets AEC-Q100-relevant reliability requirements with >200-year data retention and robust ESD immunity (≥4 kV). |
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/MS | 2.5–5.5 V VCC range; same 2048×8 organization, MSOP-8, and instruction set | Supports wider supply range including 3.3 V systems; requires updated power design | Select when operating from 3.3 V rails or mixed-voltage boards where 5 V is unavailable |
| AT25040B-MAHL-T | SPI interface (4-wire), 512×8 organization, 1.8–5.5 V, 5 ms write cycle | Requires SPI controller instead of Microwire; smaller capacity; slower write timing | Choose for SPI-native designs needing lower cost or broader voltage support, accepting reduced density and speed |
Compared with 93LC86A-I/MS, the 93C86A-I/MS offers tighter VCC tolerance and higher write speed but lacks 3.3 V compatibility; versus AT25040B-MAHL-T, it provides faster writes, Microwire simplicity, and larger memory - critical for legacy controller integration.
Availability
93C86A-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded system configuration, and automotive body control module applications requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for 93C86A-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 memory solutions, specializing in high-reliability, low-power semiconductor products for industrial, automotive, and consumer markets.
The 93C86A-I/MS belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for Microwire-compatible nonvolatile storage in cost-sensitive, space-constrained embedded systems with strict timing and data integrity requirements.
FAQ
What is the memory organization of the 93C86A-I/MS?
The 93C86A-I/MS has a fixed 2048 × 8-bit (16 Kbit) organization. Unlike 'C' variants, it does not include an ORG pin and therefore does not support 16-bit word configuration. This simplifies PCB layout and firmware design for systems requiring byte-oriented access. The 93C86A-I/MS is fully compatible with existing 8-bit Microwire implementations.
Does the 93C86A-I/MS support 3.3 V operation?
No, the 93C86A-I/MS operates only within 4.5 V to 5.5 V. Its internal voltage detect (VPOR = 3.8 V) disables all functions below this threshold, making it unsuitable for 3.3 V systems. For 3.3 V compatibility, consider the 93LC86A-I/MS (2.5–5.5 V) or 93AA86A-I/MS (1.8–5.5 V), which share identical pinout and instruction set with the 93C86A-I/MS.
How is write protection implemented on the 93C86A-I/MS?
The 93C86A-I/MS does not include a Program Enable (PE) pin or hardware write-protection feature. Write protection is managed exclusively through firmware using the EWEN (Erase/Write Enable) and EWDS (Erase/Write Disable) instructions. The device powers up in EWDS mode, requiring an explicit EWEN command before any erase or write operation - preventing accidental writes during power-up or noise events.
What is the maximum clock frequency supported by the 93C86A-I/MS?
The 93C86A-I/MS supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V. AC timing parameters (TCKH, TCKL, TDIS, etc.) are specified for this range, ensuring reliable communication with standard Microwire controllers. At lower VCC voltages, the maximum clock rate decreases - but since the 93C86A-I/MS is restricted to 4.5–5.5 V, 3 MHz is its guaranteed maximum operational frequency.
Can the 93C86A-I/MS be used as a direct replacement for the 93C86B-I/MS?
No - the 93C86A-I/MS and 93C86B-I/MS differ in memory organization: the 'A' version is 2048 × 8-bit, while the 'B' version is 1024 × 16-bit. They share identical pinout and supply specifications, but firmware must be modified to handle 16-bit vs. 8-bit addressing and data transfer. The 93C86A-I/MS is not a drop-in replacement for the 93C86B-I/MS without software adaptation.
93C86A-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
- 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
93C86A-I/MS FAQ
1.How can I place an order for 93C86A-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C86A-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 93C86A-I/MS reliable?
The price and inventory of 93C86A-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 93C86A-I/MS is usually 5 days.
3.What payment methods are accepted for 93C86A-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C86A-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C86A-I/MS?
93C86A-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C86A-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 93C86A-I/MS?
For technical support, including 93C86A-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C86A-I/MS requirements.
6.How does Aetrix verify that 93C86A-I/MS is sourced from the original manufacturer or authorized distributors?
All 93C86A-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 93C86A-I/MS meets industry standards.
7.What is the process for return or replacement of 93C86A-I/MS?
All 93C86A-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C86A-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 93C86A-I/MS part is unused and in its original packaging.
Return procedure for 93C86A-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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