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Microchip Technology 93AA86AT-I/OT
- Part No.:
- 93AA86AT-I/OT
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- SOT-23-6
- Datasheet:
-
93AA86AT-I/OT.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,920
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Product details
Overview
93AA86AT-I/OT from Microchip Technology is a 16 Kbit low-voltage serial EEPROM with 2048 × 8-bit organization, industrial temperature range (–40°C to +85°C), 1.8–5.5 V supply, and Microwire-compatible 3-wire serial interface. It provides nonvolatile storage for configuration data in embedded microcontroller systems requiring robust write protection and long-term data retention.
For engineers reviewing the 93AA86AT-I/OT datasheet, 93AA86AT-I/OT pinout, 93AA86AT-I/OT application, or 93AA86AT-I/OT equivalent, key selection criteria include its dedicated 8-bit word size (no ORG pin), absence of PE/ORG pins, 5 ms erase/write cycle time, 1 million endurance cycles, and SOT-23-6 package compatibility with space-constrained PCB layouts.
Technical Context
This device implements a synchronous Microwire-compatible serial interface with CS, CLK, DI, and DO signals. It operates without ORG or PE pins-unlike C-versions-so memory organization is fixed at 2048 × 8-bit and write protection is managed solely via EWEN/EWDS commands.
Internal logic includes automatic erase-before-write, ERAL/WRAL bulk operations, Ready/Busy status polling via DO, and power-on/off data protection triggered at VCC < 1.5 V. All timing parameters-including TCSL (250 ns), TPD (max 400 ns), and FCLK (up to 3 MHz at VCC ≥ 4.5 V)-are validated across the full industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8-bit), fixed x8 organization-no external ORG pin required |
| Supply voltage | 1.8–5.5 V-supports direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers |
| Endurance | 1,000,000 erase/write cycles-enables frequent firmware or calibration updates |
| Data retention | 200 years at 25°C-guarantees long-term reliability in unpowered storage |
| Write cycle time | 5 ms typical-self-timed erase/write eliminates need for external timing control |
| Interface | Microwire-compatible 3-wire serial (CS/CLK/DI/DO)-minimal GPIO usage on host MCU |
| Operating temp | –40°C to +85°C (Industrial grade)-qualified for industrial control and automotive body electronics |
Pinout & Package
Package: SOT-23-6 (lead-free, RoHS-compliant, 2.9 mm × 1.6 mm footprint). Pinout matches standard 6-lead SOT-23 layout with no ORG or PE terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DO (Data Out) | Tri-state output for read data and Ready/Busy status polling during programming |
| 2 | VSS | Ground reference-must be connected directly to system GND plane |
| 3 | DI (Data In) | Serial input for opcodes, addresses, and write data-synchronized to CLK rising edge |
| 4 | CLK (Clock) | Master-synchronized serial clock-supports up to 3 MHz at 4.5–5.5 V |
| 5 | CS (Chip Select) | Active-high enable-device enters standby when CS is low; minimum TCSL = 250 ns between commands |
| 6 | VCC | Power supply input-internal POR circuit triggers below 1.5 V to prevent partial writes |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing circuitry-host MCU only needs to poll DO for completion |
| Automatic ERAL before WRAL | Ensures clean memory state before bulk write-no separate erase command needed |
| EWEN/EWDS command protection | Prevents accidental writes by requiring explicit enable before each programming sequence |
| Power-on/off data protection | Hardware-level lockout below 1.5 V-guarantees data integrity during brown-out or hot-plug events |
| Sequential read mode | Enables fast burst reads across consecutive addresses with single CS assertion |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients in programmable logic controllers and RTUs. IC Role / Device Role / Timing Role: Nonvolatile parameter storage accessed during boot or field recalibration-read-only during normal operation. Use Value: Eliminates need for external trimming components; enables post-manufacture calibration updates via service port. | Use Scenario: Holding bootloader configuration flags, network MAC address, and user-defined I/O mapping in ARM Cortex-M based HMI modules. IC Role / Device Role / Timing Role: Serial configuration store interfaced directly to MCU GPIOs-no level-shifting required across 1.8–5.5 V supply range. Use Value: Reduces BOM count vs. parallel EEPROM; supports in-system reprogramming without reflashing main MCU firmware. |
| Automotive Body Control | Medical Device Settings |
Use Scenario: Saving seat/mirror position presets and lighting profiles in vehicle body control modules (BCM). IC Role / Device Role / Timing Role: Low-power, AEC-Q200-aligned nonvolatile memory-retains settings through ignition cycling and battery disconnect. Use Value: Meets automotive cold-cranking voltage drop requirements (1.8 V operation) and exceeds 15-year lifetime data retention. | Use Scenario: Storing FDA-mandated device calibration logs, user preferences, and audit trail timestamps in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant configuration memory-write-protection enforced via EWEN/EWDS protocol, not hardware pins. Use Value: Supports regulatory traceability requirements with guaranteed 200-year data retention and 1M-cycle endurance for frequent logging. |
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 | Same 2048 × 8-bit organization, but 2.5–5.5 V VCC range-lacks 1.8 V operation capability | Not suitable for 1.8 V systems; otherwise identical pinout, timing, and instruction set | Select only if system VCC is guaranteed ≥2.5 V and 1.8 V compatibility is unnecessary |
| AT25020B-SSHL-T | 2 Kbit SPI interface (not Microwire), 1.8–5.5 V, 20 MHz max clock-smaller capacity, faster interface | Requires SPI-capable MCU peripheral; incompatible command protocol and timing model | Choose when higher throughput is critical and SPI interface is available-requires firmware rewrite |
Compared with 93LC86AT-I/OT, the 93AA86AT-I/OT extends low-voltage operation to 1.8 V while maintaining identical pinout and software compatibility; versus AT25020B-SSHL-T, it preserves Microwire legacy designs but trades speed for protocol continuity and broader voltage margin.
Availability
93AA86AT-I/OT is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and automotive body control applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 93AA86AT-I/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, specializing in high-reliability embedded control products.
The 93XX series EEPROMs were designed for cost-sensitive, low-power nonvolatile storage in resource-constrained microcontroller systems-emphasizing simplicity, wide voltage operation, and robust data integrity.
FAQ
What is the memory organization of the 93AA86AT-I/OT?
The 93AA86AT-I/OT has a fixed 2048 × 8-bit organization (16 Kbit total). Unlike 'C' variants, it lacks an ORG pin-so word size cannot be changed. This simplifies design by eliminating external configuration logic and ensures deterministic addressing for 8-bit microcontrollers.
Does the 93AA86AT-I/OT support hardware write protection?
No-the 93AA86AT-I/OT does not include a Program Enable (PE) pin. Write protection is implemented exclusively through the EWEN (Erase/Write Enable) and EWDS (Erase/Write Disable) commands. This software-based method requires issuing EWEN before each erase/write sequence and EWDS afterward to prevent accidental modification.
What is the maximum clock frequency supported by the 93AA86AT-I/OT?
The 93AA86AT-I/OT supports up to 3 MHz clock frequency when VCC is 4.5–5.5 V, 2 MHz at 2.5–4.5 V, and 1 MHz at 1.8–2.5 V. These limits ensure reliable setup/hold timing across the full industrial temperature range and are specified in Table 1-2 of the DS21797L datasheet.
Can the 93AA86AT-I/OT be used in 1.8 V systems?
Yes-the 93AA86AT-I/OT is fully specified for 1.8–5.5 V operation, including all DC and AC parameters at 1.8 V. Its ability to function down to 1.8 V makes it suitable for ultra-low-power applications and direct interfacing with modern 1.8 V MCUs without level translation.
How is Ready/Busy status monitored on the 93AA86AT-I/OT?
Ready/Busy status is monitored by polling the DO pin after asserting CS high for ≥250 ns (TCSL). During erase/write operations, DO = low indicates active programming; DO = high means completion. The status remains valid until CS is brought low, after which DO returns to High-Z.
93AA86AT-I/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:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
93AA86AT-I/OT FAQ
1.How can I place an order for 93AA86AT-I/OT through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA86AT-I/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 93AA86AT-I/OT reliable?
The price and inventory of 93AA86AT-I/OT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA86AT-I/OT is usually 5 days.
3.What payment methods are accepted for 93AA86AT-I/OT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA86AT-I/OT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA86AT-I/OT?
93AA86AT-I/OT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA86AT-I/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 93AA86AT-I/OT?
For technical support, including 93AA86AT-I/OT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA86AT-I/OT requirements.
6.How does Aetrix verify that 93AA86AT-I/OT is sourced from the original manufacturer or authorized distributors?
All 93AA86AT-I/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 93AA86AT-I/OT meets industry standards.
7.What is the process for return or replacement of 93AA86AT-I/OT?
All 93AA86AT-I/OT units undergo pre-shipment inspection (PSI). If there is an issue with 93AA86AT-I/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 93AA86AT-I/OT part is unused and in its original packaging.
Return procedure for 93AA86AT-I/OT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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