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Microchip Technology 93C86A-E/MS
- Part No.:
- 93C86A-E/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93C86A-E/MS.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,789
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Product details
Overview
93C86A-E/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, -40°C to +125°C automotive temperature grade, and MSOP-8 package. It delivers 1 million erase/write cycles, >200-year data retention, and integrated power-on/off data protection for nonvolatile storage in engine control units and safety-critical sensors.
For engineers reviewing the 93C86A-E/MS datasheet, 93C86A-E/MS pinout, 93C86A-E/MS application, or 93C86A-E/MS equivalent, key selection criteria include its automotive-grade voltage tolerance (4.5–5.5 V), dedicated 8-bit organization (no ORG pin), absence of PE/ORG pins, and compatibility with legacy Microwire host controllers requiring minimal firmware changes.
Technical Context
The 93C86A-E/MS implements a synchronous serial interface using CS, CLK, and DI/DO lines with start-bit detection and opcode-based command execution. It supports READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS instructions with self-timed erase/write cycles (2 ms typical) and automatic ERAL before WRAL.
Its internal architecture includes an address decoder, mode decode logic, clock register, and output buffer, with Ready/Busy status signaled via DO pin polling during programming. Power-down protection activates below 3.8 V VCC, and all operations are inhibited until VCC stabilizes above that threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8-bit) - fixed x8 organization; no ORG pin required |
| VCC operating range | 4.5 V to 5.5 V - automotive-grade supply; operation disabled below 3.8 V |
| Endurance | 1,000,000 erase/write cycles - validated at 25°C, 5.0 V; enables long-life logging |
| Data retention | >200 years - ensures firmware/config persistence over vehicle lifetime |
| Write cycle time | 2 ms max - self-timed; eliminates need for external timing control |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - supports high-throughput configuration updates |
| Temperature grade | -40°C to +125°C (Automotive E-grade) - qualified for under-hood deployment |
Pinout & Package
8-pin MSOP (Micro Small Outline Package), 3.0 mm × 3.0 mm body, 0.65 mm pitch, exposed pad optional (VSS or floating), Pb-free Matte Tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between commands |
| CLK | Serial Clock | Rising-edge synchronized I/O; stoppable mid-sequence without corruption |
| DI | Data Input | Accepts start bit, opcodes, addresses, and write data; no bus conflict risk (no shared DO) |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS fall |
| VSS | Ground | Reference for all signals; connects to exposed pad in MSOP if used |
| VCC | Power Supply | 4.5–5.5 V only; internal POR triggers at 3.8 V threshold |
| NC | No Connect | Pins 6 and 7 are unassigned (no ORG or PE functions on 'A' version) |
Key Features
| Feature | Design Value |
|---|---|
| Industry-standard Microwire interface | Direct drop-in replacement for legacy 93Cxx EEPROMs without protocol translation |
| Self-timed erase/write cycles | Eliminates external wait-state logic; reduces MCU GPIO overhead |
| Automatic ERAL before WRAL | Guarantees full-array readiness prior to bulk write; prevents partial-program corruption |
| Power-on/off data protection | Hardware-enforced write inhibition during brown-out; no software lock needed |
| Ready/Busy status via DO pin | Enables efficient polling instead of fixed delays; improves system responsiveness |
Applications
| Engine Control Unit (ECU) Calibration Storage | Advanced Driver Assistance Systems (ADAS) Sensor Configuration |
|---|---|
Use Scenario: Storing trim values, fault codes, and adaptive learning parameters in gasoline/diesel ECUs subject to thermal cycling and vibration. IC Role / Device Role / Timing Role: Nonvolatile configuration memory interfaced directly to MCU SPI/Microwire peripheral; accessed during boot and runtime calibration. Use Value: Automotive-grade temperature range and 1M-cycle endurance ensure reliable updates across 15+ year vehicle lifetimes without field failures. | Use Scenario: Holding camera/LiDAR sensor alignment offsets, gain settings, and diagnostic thresholds in ADAS domain controllers. IC Role / Device Role / Timing Role: Dedicated x8 EEPROM providing deterministic 22-clock-cycle read access and 2 ms write latency for real-time config reload. Use Value: >200-year data retention preserves factory calibration integrity even after extended vehicle dormancy periods. |
| Electronic Power Steering (EPS) Motor Profile Storage | Body Control Module (BCM) User Preference Memory |
Use Scenario: Saving torque assist maps, steering angle compensation curves, and fail-safe profiles in EPS systems requiring ASIL-B compliance. IC Role / Device Role / Timing Role: Safety-relevant nonvolatile memory with hardware write-protection; accessed via isolated MCU interface. Use Value: 4.5–5.5 V operation matches EPS power rail; VCC detect at 3.8 V prevents partial writes during battery sag events. | Use Scenario: Retaining seat/mirror position, climate presets, and lighting profiles across ignition cycles in BCMs. IC Role / Device Role / Timing Role: Low-power serial EEPROM supporting frequent small writes during user interaction. Use Value: 1 µA standby current minimizes parasitic drain; MSOP-8 footprint enables compact placement near microcontroller. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86A-E/MS | 2.5–5.5 V VCC range; wider supply tolerance but lower min voltage | Supports mixed-signal systems with 3.3 V logic rails; not suitable for 5 V-only automotive buses | Select when system VCC may dip below 4.5 V; verify POR threshold compatibility |
| AT25DF041A-MAHN-T | 4 Mbit SPI Flash with sector protection; no built-in ERAL/WRAL; requires external erase management | Higher density for firmware storage; lacks auto-erase-before-write; needs driver layer abstraction | Choose for code storage where sequential access and bulk erase control are prioritized over EEPROM simplicity |
Compared with 93LC86A-E/MS, the 93C86A-E/MS offers tighter 4.5–5.5 V regulation for robustness in noisy 5 V automotive environments, while the AT25DF041A demands additional firmware overhead for wear leveling and erase sequencing-making the 93C86A-E/MS preferable for small, safety-critical configuration storage.
Availability
93C86A-E/MS is available at Aetrix Electronics and suitable for automotive control units, ADAS sensor modules, and electronic power steering systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for 93C86A-E/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 devices, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 93Cxx EEPROM product line was designed specifically for automotive and industrial applications demanding high reliability, extended temperature operation, and seamless integration with legacy Microwire host controllers.
FAQ
What is the memory organization of the 93C86A-E/MS?
The 93C86A-E/MS features a fixed 2048 × 8-bit (16 Kbit) organization. Unlike 'C' variants, it has no ORG pin and does not support x16 mode. This simplifies PCB layout and firmware by eliminating external logic for word-size selection, making it ideal for systems requiring byte-level access only.
Does the 93C86A-E/MS include a Program Enable (PE) pin?
No, the 93C86A-E/MS does not have a PE pin. As an 'A' version device, it lacks both ORG and PE pins-programming is always enabled when VCC is valid and EWEN command is issued. This differs from 'C' variants where PE must be pulled high to allow writes; the 93C86A-E/MS relies solely on EWEN/EWDS commands for write protection.
What is the maximum clock frequency supported by the 93C86A-E/MS?
The 93C86A-E/MS supports up to 3 MHz clock frequency when VCC is 4.5 V or higher. At lower voltages within its 4.5–5.5 V range, timing remains stable per AC specs-no derating is required. This allows fast configuration reads and writes without compromising signal integrity on standard PCB traces.
How does the 93C86A-E/MS handle power loss during write operations?
The 93C86A-E/MS incorporates hardware power-loss protection: if VCC drops below 3.8 V, all operations-including ongoing writes-are immediately inhibited. No partial writes occur, and the array remains uncorrupted. Upon recovery, the device resumes in EWDS mode, requiring explicit EWEN before next programming-ensuring data integrity in automotive brown-out conditions.
Is the 93C86A-E/MS RoHS compliant and lead-free?
Yes, the 93C86A-E/MS is Pb-free and RoHS compliant, with a Matte Tin (Sn) finish on all leads. The MSOP-8 package meets JEDEC standards for lead-free reflow profiles, and the device carries the "3e" marking per Microchip's packaging specification-confirming full compliance with EU Directive 2011/65/EU.
93C86A-E/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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
93C86A-E/MS FAQ
1.How can I place an order for 93C86A-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C86A-E/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-E/MS reliable?
The price and inventory of 93C86A-E/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-E/MS is usually 5 days.
3.What payment methods are accepted for 93C86A-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C86A-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C86A-E/MS?
93C86A-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C86A-E/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-E/MS?
For technical support, including 93C86A-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C86A-E/MS requirements.
6.How does Aetrix verify that 93C86A-E/MS is sourced from the original manufacturer or authorized distributors?
All 93C86A-E/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-E/MS meets industry standards.
7.What is the process for return or replacement of 93C86A-E/MS?
All 93C86A-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93C86A-E/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-E/MS part is unused and in its original packaging.
Return procedure for 93C86A-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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