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Microchip Technology 93C86AT-E/OT
- Part No.:
- 93C86AT-E/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93C86AT-E/OT.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:1,800
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Product details
Overview
93C86AT-E/OT 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-temperature operation (–40°C to +85°C). It features self-timed erase/write cycles, automatic ERAL before WRAL, power-on/off data protection, and Ready/Busy status signaling via DO pin - used in embedded system configuration storage, sensor calibration memory, and firmware parameter retention.
For engineers reviewing the 93C86AT-E/OT datasheet, 93C86AT-E/OT pinout, 93C86AT-E/OT application, or 93C86AT-E/OT equivalent, key selection criteria include its fixed 8-bit organization (no ORG pin), absence of PE/ORG pins, 2 ms write cycle time, 1 million endurance cycles, and SOT-23-6 package compatibility with space-constrained PCB layouts.
Technical Context
The 93C86AT-E/OT implements a synchronous serial Microwire protocol with CS, CLK, and DI/DO signal lines. Its internal architecture includes an address decoder, mode decode logic, and output buffer, supporting READ, WRITE, ERASE, ERAL, WRAL, EWEN, and EWDS instructions - all clocked on CLK rising edges. No external logic is required for word-size selection, as it is fixed at 8-bit.
It operates exclusively in the 4.5–5.5 V VCC range and requires ≥4.5 V for ERAL and WRAL functions. Power-on reset circuitry inhibits all operations below 3.8 V, and the device powers up in EWDS (Erase/Write Disable) state - requiring explicit EWEN before any programming sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8-bit) - fixed x8 organization; no ORG pin support |
| VCC range | 4.5 V to 5.5 V - operation disabled below 3.8 V for data integrity |
| Write cycle time | 2 ms - self-timed; includes auto-erase; no external timing control needed |
| Endurance | 1,000,000 erase/write cycles - specified at 25°C, VCC = 5.0 V |
| Data retention | 200 years - guaranteed nonvolatile storage under rated conditions |
| Interface | Microwire-compatible 3-wire serial (CS, CLK, DI/DO) - no separate ORG or PE pins |
| Temp range | –40°C to +85°C (Industrial grade) - validated across full range per DS21797L |
Pinout & Package
Package: SOT-23-6 (lead-free, matte tin finish), 2.9 mm × 1.6 mm footprint, suitable for high-density PCBs and automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - DO | Data Output / Status | Tri-state output delivering read data or Ready/Busy status (low = busy); enters High-Z on CS falling edge |
| 2 - VSS | Ground | Reference return path for all signals; must be low-impedance connection |
| 3 - DI | Data Input | Serial input for opcodes, addresses, and write data; sampled on CLK rising edge |
| 4 - CLK | Serial Clock | Synchronization signal; rising edge clocks all data; stoppable at any point without corruption |
| 5 - CS | Chip Select | Active-high enable; device enters Standby when low; minimum 250 ns low time required between commands |
| 6 - VCC | Power Supply | 4.5–5.5 V supply; internal POR triggers below 3.8 V to block writes |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed Erase/Write | Eliminates need for external timing control or polling delay loops - reduces firmware overhead |
| Automatic ERAL before WRAL | Ensures full array erasure prior to bulk write, preventing partial-data corruption in configuration updates |
| Power-On/Off Data Protection | Hardware-level inhibition below 3.8 V prevents inadvertent writes during brown-out or power ramp-up |
| Ready/Busy Status via DO | Enables real-time polling without additional pins - simplifies host controller I/O resource usage |
| 1,000,000 E/W Cycles | Supports frequent field updates (e.g., logging, calibration, OTA settings) over product lifetime |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Memory |
|---|---|
Use Scenario: Storing factory-calibrated coefficients and temperature compensation tables in pressure or humidity sensors. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed infrequently during initialization or field recalibration. Use Value: Ensures measurement accuracy across operating life without battery backup or external NVSRAM. | Use Scenario: Retaining user-configurable settings (e.g., display brightness, communication baud rate, alarm thresholds) in HVAC controllers. IC Role / Device Role / Timing Role: Serial configuration register bank interfaced via MCU GPIO bit-banging or hardware SPI/Microwire peripheral. Use Value: Survives power loss and enables plug-and-play setup persistence across firmware updates. |
| Firmware Parameter Backup | Medical Device Setup Profile Storage |
Use Scenario: Backing up runtime-modified firmware parameters (e.g., PID gains, filter coefficients) in motor drives after tuning. IC Role / Device Role / Timing Role: Low-pin-count, low-power serial memory co-located with MCU for fast, deterministic save/restore. Use Value: Enables adaptive control without requiring full flash reprogramming or external FRAM. | Use Scenario: Storing patient-specific therapy profiles (e.g., infusion rates, dose limits) in portable insulin pumps. IC Role / Device Role / Timing Role: Certified-reliable nonvolatile storage with 200-year retention and 1M-cycle endurance for safety-critical data. Use Value: Meets IEC 62304 data integrity requirements without redundant storage or checksum overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86AT-I/OT | Wider VCC range (2.5–5.5 V); same 8-bit organization, SOT-23-6 package, and instruction set | Supports single-supply 3.3 V systems; not rated for 5 V-only operation like 93C86AT-E/OT | Select when operating from 2.5–3.6 V rails; avoid if system runs strictly at 5 V with marginal noise margin |
| AT25020B-MAH-T | SPI interface (4-wire), 2 K × 8-bit, 1.8–5.5 V, 5 ms write time, SOIC-8 package | Requires dedicated SPI peripheral and extra chip-select line; larger footprint than SOT-23-6 | Choose for SPI-native designs where pin count allows; not drop-in compatible due to interface and package mismatch |
Compared with 93LC86AT-I/OT and AT25020B-MAH-T, the 93C86AT-E/OT offers optimal fit for 5 V industrial systems needing minimal board area, Microwire compatibility, and guaranteed 4.5–5.5 V operation - with faster 2 ms writes and tighter voltage lockout at 3.8 V.
Availability
93C86AT-E/OT is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration memory, and firmware parameter backup requiring stable component supply across extended production lifecycles.
Supply support for 93C86AT-E/OT 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, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The 93Cxx series was designed specifically for cost-sensitive, low-pin-count serial EEPROM applications in industrial and commercial equipment - emphasizing robustness, long-term data retention, and seamless integration with legacy Microwire-based controllers.
FAQ
What is the memory organization of the 93C86AT-E/OT?
The 93C86AT-E/OT has a fixed 2048 × 8-bit (16 Kbit) organization. Unlike 'C' variants, it lacks an ORG pin and is not configurable for 16-bit operation - it only supports x8 addressing and data transfer. This is confirmed in the Device Selection Table and Pin Function Table of DS21797L, where 93C86A entries show "No" for ORG and "8-bit" for Word Size.
Does the 93C86AT-E/OT have a Program Enable (PE) pin?
No, the 93C86AT-E/OT does not include a PE pin. As stated in the Device Selection Table and Pin Function Table, PE is only present on 'C' versions (e.g., 93C86C), while 93C86A devices like the 93C86AT-E/OT omit both ORG and PE pins. Programming is always enabled after issuing EWEN, with no hardware write-protection pin.
What is the maximum clock frequency supported by the 93C86AT-E/OT?
The 93C86AT-E/OT supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V, as specified in Table 1-2 (A1: FCLK). At lower voltages, the max frequency decreases - but since this part is rated only for 4.5–5.5 V, 3 MHz is its operational maximum. Timing margins (TCKH, TCKL) are defined accordingly in the same table.
Can the 93C86AT-E/OT be used in automotive applications?
No, the 93C86AT-E/OT is rated for Industrial temperature range (–40°C to +85°C), denoted by the 'I' in its marking code and 'I' in the Device Selection Table. Automotive-grade variants (e.g., 93C86BT-E/SN) carry 'E' suffix and are qualified to –40°C to +125°C - the 93C86AT-E/OT is not tested or guaranteed for the extended automotive temperature range.
What package type is used for the 93C86AT-E/OT?
93C86AT-E/OT uses the SOT-23-6 package (designated 'OT' in Microchip's packaging codes), with pinout: DO (1), VSS (2), DI (3), CLK (4), CS (5), VCC (6). This is confirmed in the Device Selection Table (Packages column), Package Types diagram (SOT-23 section), and Package Marking Information table where '93C86A' maps to 'OT' for I-temp SOT-23.
93C86AT-E/OT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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:
- SOT-23-6
93C86AT-E/OT FAQ
1.How can I place an order for 93C86AT-E/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93C86AT-E/OT 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/OT reliable?
The price and inventory of 93C86AT-E/OT 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/OT is usually 5 days.
3.What payment methods are accepted for 93C86AT-E/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93C86AT-E/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93C86AT-E/OT?
93C86AT-E/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93C86AT-E/OT 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/OT?
For technical support, including 93C86AT-E/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93C86AT-E/OT requirements.
6.How does Aetrix verify that 93C86AT-E/OT is sourced from the original manufacturer or authorized distributors?
All 93C86AT-E/OT 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/OT meets industry standards.
7.What is the process for return or replacement of 93C86AT-E/OT?
All 93C86AT-E/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93C86AT-E/OT, 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/OT part is unused and in its original packaging.
Return procedure for 93C86AT-E/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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