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Microchip Technology 93C86AT-E/SN
- Part No.:
- 93C86AT-E/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93C86AT-E/SN.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,664
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Product details
Overview
93C86AT-E/SN 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, and industrial/automotive temperature support (–40°C to +125°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and Ready/Busy status via DO pin - deployed in automotive body control modules for calibration storage.
For engineers reviewing the 93C86AT-E/SN datasheet, 93C86AT-E/SN pinout, 93C86AT-E/SN application, or 93C86AT-E/SN equivalent, key selection criteria include VCC operating range (4.5–5.5 V), 8-bit organization (fixed, no ORG pin), automotive-grade temperature rating, write endurance (1 million cycles), and SOIC-8 package compatibility with legacy PCB layouts.
Technical Context
This device implements a synchronous serial Microwire protocol with CS, CLK, DI, and DO signals. All instructions - READ, WRITE, ERASE, ERAL, WRAL, EWEN, EWDS - are initiated by a Start bit (CS high + DI high on CLK rising edge) and executed with precise clock timing per AC specs (e.g., TCKH ≥ 200 ns at 4.5–5.5 V).
It uses internal auto-erase-before-write logic and supports sequential read mode when CS remains high. The DO pin serves dual function: data output during READ and Ready/Busy status indicator during programming - requiring CS reassertion after TCSL ≥ 250 ns to sample status.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8-bit organization - fixed, no ORG pin) |
| VCC operating range | 4.5 V to 5.5 V - ensures compatibility with 5 V automotive microcontroller I/O rails |
| Endurance | 1,000,000 erase/write cycles - supports frequent recalibration updates in vehicle ECUs |
| Data retention | Greater than 200 years at 85°C - guarantees long-term storage integrity without refresh |
| Write cycle time | 2 ms typical - enables fast firmware parameter updates during production test or field service |
| Temperature grade | Automotive (E): –40°C to +125°C - qualified for under-hood and transmission control applications |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO) - interoperable with legacy MCU SPI peripherals in 3-wire mode |
Pinout & Package
8-pin SOIC (SN) package with standard 150-mil width, RoHS-compliant matte tin finish, and Pb-free construction. Pin 1 marked by laser dot; pin 1 ID corner defined per JEDEC MS-012.
| 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 timing source; stoppable mid-sequence without corruption |
| DI | Data Input | Accepts Start bit, opcode, address, and write data; requires stable setup/hold per A7/A8 |
| DO | Data Output / Status | Tri-state output: delivers read data or indicates Ready (high) / Busy (low) during programming |
| VSS | Ground | Reference return path for all digital and analog functions; must be low-impedance |
| VCC | Power Supply | 4.5–5.5 V supply; internal POR triggers at ~3.8 V - prevents spurious writes during brown-out |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates external timing circuitry; internal state machine manages auto-erase and programming phases |
| Automatic ERAL before WRAL | Ensures full array erase prior to bulk write - prevents partial-data corruption during firmware update |
| Power-On/Off Data Protection | Hardware lockout below VCC = 3.8 V prevents inadvertent writes during power ramp-up/down |
| Ready/Busy Status on DO | Enables polling-based host synchronization without dedicated interrupt lines or fixed delay loops |
| Sequential Read Mode | Reduces instruction overhead: holding CS high auto-increments address and streams consecutive bytes |
Applications
| Automotive Body Control Unit (BCU) | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing door lock actuator calibration offsets and seat position memory profiles across vehicle lifetime. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed via MCU's Microwire peripheral during boot and runtime reconfiguration. Use Value: 125°C rating ensures reliability near HVAC ducts; 1M-cycle endurance supports dealer-level recalibration every 50,000 km. | Use Scenario: Retaining I/O module mapping, scaling factors, and alarm thresholds after power loss in factory automation controllers. IC Role / Device Role / Timing Role: Serial configuration EEPROM interfaced to ARM Cortex-M4 via GPIO-banged Microwire protocol. Use Value: 2 ms write time enables <100 ms full-parameter save during emergency shutdown; SOIC-8 footprint matches legacy board designs. |
| Medical Infusion Pump Calibration | Smart Energy Meter Firmware Parameters |
Use Scenario: Holding flow-rate correction coefficients and safety-critical dose limits updated during service calibration. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile memory with hardware write-protection enforced by power-rail monitoring. Use Value: >200-year data retention meets ISO 13485 long-term traceability requirements; 5.5 V max VCC accommodates backup battery switchover circuits. | Use Scenario: Storing tariff tables, metering constants, and communication keys in ANSI C12.19-compliant utility meters. IC Role / Device Role / Timing Role: Trusted configuration store accessed during cold start and OTA firmware patch validation. Use Value: Automotive temp grade ensures operation inside outdoor meter enclosures exposed to desert heat; 3-wire interface minimizes MCU pin count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93C86A-I/SN | Same 2048×8 organization and SOIC-8 package, but rated only for Industrial (–40°C to +85°C) temperature range | Not qualified for under-hood or transmission control environments requiring 125°C operation | Select only for cost-sensitive consumer or industrial indoor applications where ambient stays ≤85°C |
| AT25DF041A-SHN-T | 4 Mbit SPI Flash with sector erase; requires different command set and lacks built-in ERAL/WRAL; no Ready/Busy pin - relies on WIP polling | Higher density but no hardware auto-erase; not drop-in compatible due to interface and timing differences | Consider only when migrating to SPI-based architecture and redesigning firmware for flash-specific erase granularity |
Compared with 93C86AT-E/SN, the 93C86A-I/SN offers identical functionality at lower cost but sacrifices automotive qualification, while AT25DF041A-SHN-T provides greater capacity at the expense of increased software complexity and loss of deterministic WRAL/ERAL behavior.
Availability
93C86AT-E/SN is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and medical device manufacturing requiring stable component supply with guaranteed automotive-grade qualification and long-term lifecycle support.
Supply support for 93C86AT-E/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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93Cxx series targets cost-sensitive, low-power nonvolatile memory applications in automotive, industrial, and consumer systems - emphasizing robustness, ease of integration, and long-term data integrity over high-speed throughput.
FAQ
What is the memory organization of the 93C86AT-E/SN?
The 93C86AT-E/SN has a fixed 2048 × 8-bit (16 Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin - so word size is permanently set to 8-bit. This eliminates external configuration logic and simplifies PCB layout for applications requiring byte-addressable storage.
Does the 93C86AT-E/SN require an external Program Enable (PE) signal?
No. The 93C86AT-E/SN is an 'A'-version device and does not include a PE pin. Programming is always enabled after issuing an EWEN command; write protection relies solely on the EWEN/EWDS instruction sequence and VCC brown-out detection at ~3.8 V.
What is the maximum clock frequency supported by the 93C86AT-E/SN?
The 93C86AT-E/SN supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V. At this rate, READ and WRITE operations complete in 22 and 22 clock cycles respectively, enabling sub-10 µs instruction execution for efficient parameter access in real-time systems.
How does the Ready/Busy status work on the 93C86AT-E/SN DO pin?
During ERASE or WRITE cycles, the DO pin outputs Ready (high) or Busy (low) status - but only if CS is reasserted high after being low for ≥250 ns (TCSL). If CS remains low throughout programming, DO stays in High-Z and status cannot be polled. This design prevents bus contention in shared-data-line configurations.
Is the 93C86AT-E/SN pin-compatible with other 93C86 variants in SOIC-8 package?
Yes - the 93C86AT-E/SN shares identical SOIC-8 (SN) pinout with 93C86A-I/SN, 93C86B-I/SN, and 93C86B-E/SN. However, 'B' variants are 1024 × 16-bit and require different addressing; 'C' variants add ORG and PE pins not present on the 93C86AT-E/SN, making them physically incompatible despite same package outline.
93C86AT-E/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-SOIC
93C86AT-E/SN FAQ
1.How can I place an order for 93C86AT-E/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C86AT-E/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 93C86AT-E/SN reliable?
The price and inventory of 93C86AT-E/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93C86AT-E/SN is usually 5 days.
3.What payment methods are accepted for 93C86AT-E/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C86AT-E/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C86AT-E/SN?
93C86AT-E/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C86AT-E/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 93C86AT-E/SN?
For technical support, including 93C86AT-E/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C86AT-E/SN requirements.
6.How does Aetrix verify that 93C86AT-E/SN is sourced from the original manufacturer or authorized distributors?
All 93C86AT-E/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 93C86AT-E/SN meets industry standards.
7.What is the process for return or replacement of 93C86AT-E/SN?
All 93C86AT-E/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93C86AT-E/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 93C86AT-E/SN part is unused and in its original packaging.
Return procedure for 93C86AT-E/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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