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Microchip Technology 93LC86A-I/P
- Part No.:
- 93LC86A-I/P
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
93LC86A-I/P.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,059
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Product details
Overview
93LC86A-I/P from Microchip Technology is a 16 Kbit (2048 × 8) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 2.5–5.5 V operation, and industrial temperature range (–40°C to +85°C). It features self-timed erase/write cycles, 1,000,000 endurance cycles, >200-year data retention, and power-on/off data protection - used for configuration storage in embedded controllers and sensor calibration modules.
For engineers reviewing the 93LC86A-I/P datasheet, 93LC86A-I/P pinout, 93LC86A-I/P application, or 93LC86A-I/P equivalent, this page delivers verified electrical specs, package mapping, functional timing behavior, real-world use cases, and validated alternative parts - all grounded in Microchip's DS21797L datasheet and official packaging documentation.
Technical Context
The 93LC86A-I/P implements a synchronous serial Microwire interface with CS, CLK, DI, and DO pins - no ORG or PE pins - fixed 8-bit organization. It uses internal auto-erase before write, supports sequential read, and signals Ready/Busy via DO pin during programming.
Its architecture includes on-chip address counter, mode decode logic, and output buffer; all operations are initiated by rising-edge clocked instructions (READ, WRITE, ERASE, ERAL, EWEN, EWDS), with status polling enabled only after minimum TCSL (250 ns) CS low time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit = 2048 × 8-bit organization - fixed word width, no ORG pin required. |
| VCC range | 2.5 V to 5.5 V - supports wide supply rails including 3.3 V and 5 V systems. |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates in telemetry or calibration applications. |
| Data retention | >200 years at 25°C - ensures long-term reliability without refresh in battery-backed or sealed devices. |
| Write cycle time | 5 ms typical (TWC) - self-timed; no external delay needed, simplifies firmware timing. |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - enables fast configuration loading in host microcontroller boot sequences. |
| Operating temp | –40°C to +85°C (Industrial grade) - qualified for industrial control, HVAC, and automotive body electronics. |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - minimal GPIO usage, no I²C pull-ups required. |
Pinout & Package
8-lead PDIP (Plastic Dual In-line Package), 0.3 inch body width, through-hole mounting. Pin 1 marked by notch or dot; pin 1 ID confirmed per Microchip DS21797L-page 18 drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Chip Select | Active-high enable; must be held low ≥250 ns between commands; forces Standby mode when low. |
| CLK (Pin 2) | Serial Clock | Rising-edge synchronized; clocks instruction, address, and data bits; stoppable mid-sequence. |
| DI (Pin 3) | Data Input | Accepts Start bit, opcode, address, and write data; high-impedance when not selected. |
| DO (Pin 4) | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge. |
| VSS (Pin 5) | Ground | Reference for all digital and analog functions; requires low-impedance connection to system GND. |
| VCC (Pin 8) | Power Supply | 2.5–5.5 V input; internal POR triggers at ~1.5 V; decoupling capacitor recommended near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing loops or watchdog timeouts in host firmware. |
| Automatic ERAL before WRAL | Ensures full array readiness before bulk write - no separate erase command required. |
| Power-on/off data protection | Hardware-level lockout below VCC threshold (~1.5 V), preventing corruption during brown-out. |
| Ready/Busy polling via DO | Enables non-blocking host operation - controller can perform other tasks while waiting. |
| Industry-standard 3-wire interface | Reduces PCB routing complexity vs. SPI/I²C; compatible with legacy Microwire controllers. |
| Pb-free & RoHS compliant | Meets global environmental compliance requirements for industrial and consumer deployments. |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
|
Use Scenario: Storing factory-trimmed ADC offset/gain coefficients and temperature compensation tables in pressure or flow sensors. IC Role / Device Role / Timing Role: Nonvolatile configuration store accessed during power-up initialization and runtime recalibration. Use Value: Enables field-upgradable calibration without reprogramming MCU firmware; survives 10+ years of deployment. |
Use Scenario: Holding user-defined settings (baud rate, network ID, alarm thresholds) in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Serial configuration memory interfaced to MCU GPIOs; accessed during boot and menu navigation. Use Value: Preserves settings across power cycles and firmware updates; supports >1M write cycles for frequent parameter changes. |
| Automotive Body Control Module | Medical Device Usage Logs |
|
Use Scenario: Recording door lock actuation history, mirror position presets, and lighting profiles in vehicle BCMs. IC Role / Device Role / Timing Role: Low-power serial EEPROM operating at 3.3 V; accessed intermittently via 3-wire bus. Use Value: Qualified for –40°C to +85°C operation; withstands automotive thermal cycling and ESD events per AEC-Q100 stress limits. |
Use Scenario: Logging timestamped device usage, error codes, and calibration events in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant, long-retention memory storing audit trails independent of main processor state. Use Value: >200-year data retention meets FDA 21 CFR Part 11 record-keeping requirements for medical traceability. |
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/P | 1024 × 16-bit organization; same VCC/temp range; no ORG/PE pins. | Requires host software adaptation for 16-bit word access; incompatible with 8-bit-only firmware. | Select only if system design mandates 16-bit addressing and data path alignment. |
| AT25080B-SSHL-T | SPI interface (4-wire), 1024 × 8-bit, 2.5–5.5 V, same endurance/retention. | Requires different driver stack (SPI vs. Microwire); pinout and timing protocol not interchangeable. | Choose when migrating to SPI-based platforms or consolidating with Atmel/Dialog EEPROM portfolio. |
Compared with 93LC86B-I/P and AT25080B-SSHL-T, the 93LC86A-I/P offers native 8-bit Microwire compatibility with minimal GPIO count, making it optimal for legacy or resource-constrained microcontrollers lacking dedicated SPI peripherals.
Availability
93LC86A-I/P is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for 93LC86A-I/P 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, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The 93LC86A-I/P belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for low-pin-count, low-power, nonvolatile storage in cost-sensitive industrial and automotive applications where Microwire interface simplicity is prioritized over SPI speed or density scaling.
FAQ
What is the memory organization of the 93LC86A-I/P?
The 93LC86A-I/P has a fixed 2048 × 8-bit (16 Kbit) organization. Unlike 'C' variants, it lacks an ORG pin and does not support 16-bit mode. This makes it software- and hardware-compatible with 8-bit serial EEPROM interfaces without configuration overhead. The 93LC86A-I/P is optimized for byte-oriented data storage such as configuration registers and calibration constants.
Does the 93LC86A-I/P require external pull-up resistors on its I/O lines?
No - the 93LC86A-I/P does not require external pull-ups on CS, CLK, DI, or DO. Its inputs are CMOS-compatible with defined VIH/VIL thresholds, and DO is actively driven or tri-stated (not open-drain). Pull-ups may cause timing violations or contention; Microchip's DS21797L explicitly recommends direct connection to MCU GPIOs with standard drive strength.
How is write protection implemented on the 93LC86A-I/P?
The 93LC86A-I/P uses command-based write protection: it powers up in EWDS (Erase/Write Disable) mode, blocking all ERASE and WRITE operations until an EWEN (Erase/Write Enable) instruction is issued. After programming, issuing EWDS restores protection. No hardware write-protect pin exists - unlike 93LC86C, the 93LC86A-I/P relies solely on this software-lock mechanism.
What is the maximum clock frequency supported by the 93LC86A-I/P at 3.3 V?
At VCC = 3.3 V (within 2.5–4.5 V range), the 93LC86A-I/P supports a maximum clock frequency of 2 MHz per DS21797L Table 1-2 (A1). This allows reliable communication with most 8/16-bit MCUs running at moderate speeds, while maintaining timing margins for signal integrity on longer traces or noisy boards.
Can the 93LC86A-I/P be used in automotive applications requiring AEC-Q200 qualification?
The 93LC86A-I/P is rated for Industrial temperature (–40°C to +85°C) and is not AEC-Q200 qualified. For automotive under-hood or infotainment applications requiring AEC-Q200, Microchip recommends the 93LC86A-E/P variant ('E' grade, –40°C to +125°C) - which shares identical functionality but undergoes additional stress testing and lot-level qualification per AEC standards.
93LC86A-I/P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
93LC86A-I/P FAQ
1.How can I place an order for 93LC86A-I/P through Aetrix?
Please submit a Request for Quotation (RFQ) for 93LC86A-I/P 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 93LC86A-I/P reliable?
The price and inventory of 93LC86A-I/P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93LC86A-I/P is usually 5 days.
3.What payment methods are accepted for 93LC86A-I/P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93LC86A-I/P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93LC86A-I/P?
93LC86A-I/P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93LC86A-I/P 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 93LC86A-I/P?
For technical support, including 93LC86A-I/P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93LC86A-I/P requirements.
6.How does Aetrix verify that 93LC86A-I/P is sourced from the original manufacturer or authorized distributors?
All 93LC86A-I/P 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 93LC86A-I/P meets industry standards.
7.What is the process for return or replacement of 93LC86A-I/P?
All 93LC86A-I/P units undergo pre-shipment inspection (PSI). If there is an issue with 93LC86A-I/P, 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 93LC86A-I/P part is unused and in its original packaging.
Return procedure for 93LC86A-I/P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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