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Microchip Technology 93C86A-I/SN
- Part No.:
- 93C86A-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93C86A-I/SN.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,824
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Product details
Overview
93C86A-I/SN from Microchip Technology is a 16 Kbit (2048 × 8-bit) Microwire-compatible serial EEPROM designed for nonvolatile data storage in embedded control systems. It operates from 4.5V to 5.5V, supports Industrial temperature range (–40°C to +85°C), delivers 1 million erase/write cycles, and retains data for over 200 years. It is used in microcontroller-based systems requiring reliable parameter storage, such as industrial sensor calibration and power supply configuration.
For engineers reviewing the 93C86A-I/SN datasheet, 93C86A-I/SN pinout, 93C86A-I/SN application, or 93C86A-I/SN equivalent, key selection criteria include its fixed 8-bit organization, absence of ORG/PE pins, Microwire interface timing compliance at up to 3 MHz, and compatibility with legacy 3-wire serial memory controllers in space-constrained designs.
Technical Context
The 93C86A-I/SN implements a synchronous 3-wire Microwire interface (CS, CLK, DI/DO) with start-bit detection and opcode-driven command execution. It uses self-timed internal auto-erase before write, eliminating external timing control for WRITE and ERAL operations.
Its Ready/Busy status is signaled via DO pin during programming - low indicates active erase/write, high confirms completion - and requires CS reassertion after TCSL ≥250 ns to sample status. Power-on reset circuitry inhibits operation below VCC = 3.8 V, ensuring data integrity during brown-out conditions.
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 - compatible with 5 V logic systems; disables below 3.8 V for POR protection |
| Clock frequency | Up to 3 MHz at VCC ≥ 4.5 V - enables fast serial access without external wait states |
| Erase/write cycle time | 2 ms per byte/word - self-timed; no host CPU polling overhead beyond status check |
| Data retention | > 200 years at +25°C - ensures long-term firmware or calibration data persistence |
| Endurance | 1,000,000 cycles - supports frequent field updates in telemetry or logging applications |
| Interface standard | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy MCU peripherals |
Pinout & Package
8-lead SOIC package (SN suffix), 3.9 mm × 4.9 mm body, 1.27 mm pitch, Pb-free Matte Tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; device enters Standby when low; must be held low ≥250 ns between commands |
| CLK | Serial Clock | Positive-edge synchronized; controls all data/opcode transfers; may be paused mid-sequence |
| DI | Data Input | Receives Start bit, opcodes, addresses, and write data; shares bidirectional bus with DO in some layouts |
| DO | Data Output / Status | Outputs read data or Ready/Busy signal (low = busy); enters High-Z when CS is low |
| VSS | Ground | Reference return path for all I/O and core logic; must be low-impedance |
| VCC | Power Supply | Primary 4.5–5.5 V supply; internal voltage detector blocks operation below 3.8 V |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for host-controlled timing delays; reduces firmware complexity and interrupt latency |
| Automatic ERAL before WRAL | Ensures full-array write reliability without separate erase command sequence |
| Power-On/Off Data Protection | Hardware-enforced lockout below 3.8 V prevents corruption during power ramp-up/down |
| Ready/Busy via DO pin | Enables efficient polling instead of fixed delay loops; saves CPU cycles in real-time systems |
| Sequential Read Mode | Allows continuous address increment on DO while CS remains high - ideal for block reads |
Applications
| Industrial Sensor Calibration | Microcontroller Configuration Storage |
|---|---|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed during system boot or recalibration routines. Use Value: Maintains accuracy across power cycles and field updates; 1M endurance supports periodic recalibration in maintenance workflows. | Use Scenario: Holding bootloader configuration flags, communication protocol settings, and hardware revision IDs in 8-bit MCU-based edge nodes. IC Role / Device Role / Timing Role: Serial configuration memory mapped via GPIO bit-banged Microwire interface. Use Value: Enables field-upgradable settings without reflashing main firmware; 3 MHz clock supports sub-100 µs read latency. |
| Power Supply Trim Storage | Legacy Automotive Body Control Module |
Use Scenario: Saving digitally trimmed DAC values for voltage regulation feedback loops in AC/DC SMPS controllers. IC Role / Device Role / Timing Role: Low-pin-count external memory interfaced to dedicated PMIC controller IC. Use Value: Survives >200 years to match product lifetime; 4.5–5.5 V range aligns with auxiliary 5 V rail in power management subsystems. | Use Scenario: Storing seat position presets, mirror angle offsets, and lighting profiles in pre-2010 automotive BCMs using discrete logic controllers. IC Role / Device Role / Timing Role: Microwire-compatible EEPROM replacing obsolete 93C46/93C56 in legacy harness designs. Use Value: Pin- and timing-compatible drop-in upgrade with enhanced endurance and data retention. |
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 | Wider VCC range (2.5–5.5 V); same 2048×8 organization; identical pinout and instruction set | Supports 3.3 V and 5 V systems; suitable where mixed-voltage design or brown-out tolerance below 4.5 V is required | Select when system VCC may dip below 4.5 V or when dual-voltage compatibility is needed |
| AT25020B-MAU-1.8 | SPI interface (4-wire), 2 Kbit (256×8), 1.8–5.5 V operation, faster 20 MHz clock, different command set | Requires SPI master peripheral; not Microwire-compatible; smaller capacity but higher speed and lower voltage support | Choose only if migrating to SPI architecture and reducing memory footprint is acceptable |
Compared with 93LC86A-I/SN, the 93C86A-I/SN offers tighter VCC specification (4.5–5.5 V) and higher immunity to undervoltage corruption, while AT25020B-MAU-1.8 trades Microwire compatibility for SPI speed and broader voltage range - making it unsuitable as a direct replacement without firmware and layout changes.
Availability
93C86A-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, microcontroller configuration storage, and power supply trim storage requiring stable component supply and long-lifecycle support.
Supply support for 93C86A-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 components, and memory solutions, specializing in embedded control and connectivity.
The 93Cxx series was designed specifically for cost-sensitive, space-constrained applications needing robust, low-pin-count serial EEPROM with Microwire compatibility and guaranteed data integrity across wide temperature ranges.
FAQ
What is the memory organization of the 93C86A-I/SN?
The 93C86A-I/SN has a fixed 2048 × 8-bit (16 Kbit) organization. Unlike 'C' variants, it lacks an ORG pin and does not support 16-bit word mode - all operations use 8-bit addressing and data transfer. This simplifies interface design in legacy 8-bit MCU systems relying on Microwire protocols.
Does the 93C86A-I/SN support the Program Enable (PE) pin?
No, the 93C86A-I/SN does not include a PE pin. The PE function is exclusive to 'C' versions (e.g., 93C86C). In the 93C86A-I/SN, write protection is managed solely via EWEN/EWDS instructions - meaning software-controlled enable/disable of erase/write functions, with no hardware pin for physical lockout.
What is the maximum clock frequency supported by the 93C86A-I/SN?
The 93C86A-I/SN supports up to 3 MHz clock frequency when VCC is 4.5 V or higher. At lower voltages (not applicable here, since its VCC range starts at 4.5 V), timing margins would relax - but within its specified 4.5–5.5 V range, 3 MHz is the guaranteed maximum for reliable opcode, address, and data sampling.
How does the Ready/Busy status work on the 93C86A-I/SN?
The 93C86A-I/SN signals Ready/Busy status on the DO pin: DO = low indicates ongoing erase/write, DO = high means operation complete. To read status, CS must be brought high for ≥250 ns after TCSL, then DO sampled. After completion, issuing a Start bit followed by CS low clears the status flag from DO.
Is the 93C86A-I/SN RoHS compliant and Pb-free?
Yes, the 93C86A-I/SN is Pb-free and RoHS compliant, with a Matte Tin (Sn) finish on its 8-lead SOIC (SN) package. This meets EU Directive 2011/65/EU and is verified per Microchip's packaging specifications referenced in DS21797L.
93C86A-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
93C86A-I/SN FAQ
1.How can I place an order for 93C86A-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C86A-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 93C86A-I/SN reliable?
The price and inventory of 93C86A-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 93C86A-I/SN is usually 5 days.
3.What payment methods are accepted for 93C86A-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C86A-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C86A-I/SN?
93C86A-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C86A-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 93C86A-I/SN?
For technical support, including 93C86A-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C86A-I/SN requirements.
6.How does Aetrix verify that 93C86A-I/SN is sourced from the original manufacturer or authorized distributors?
All 93C86A-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 93C86A-I/SN meets industry standards.
7.What is the process for return or replacement of 93C86A-I/SN?
All 93C86A-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93C86A-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 93C86A-I/SN part is unused and in its original packaging.
Return procedure for 93C86A-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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