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Microchip Technology 93AA86CT-I/MS
- Part No.:
- 93AA86CT-I/MS
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
93AA86CT-I/MS.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,915
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Product details
Overview
93AA86CT-I/MS from Microchip Technology is a 16 Kbit low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V operation, and configurable 8-/16-bit word organization via ORG pin. It features program enable (PE) write protection, self-timed erase/write cycles, 1 million endurance cycles, and industrial temperature range (–40°C to +85°C). Used in embedded system configuration storage where compact nonvolatile memory with flexible data width is required.
For engineers reviewing the 93AA86CT-I/MS datasheet, 93AA86CT-I/MS pinout, 93AA86CT-I/MS application, or 93AA86CT-I/MS equivalent, key selection considerations include voltage compatibility (1.8–5.5 V), MSOP-8 package footprint, ORG/PE pin dependency for configuration and write control, Ready/Busy status polling via DO, and Microwire protocol timing compliance at up to 3 MHz.
Technical Context
The 93AA86CT-I/MS implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, requiring a Start bit detection before instruction execution. Its dual-word-size capability (8-bit or 16-bit) is determined solely by the logic level on the ORG pin-high for x16, low for x8-and is exclusive to the 'C' variant.
Write operations require prior EWEN command activation and a high logic level on the PE pin during the final data clock edge; ERAL and WRAL commands are fully self-timed and demand VCC ≥ 4.5 V. The DO pin serves dual roles: serial data output during READ and Ready/Busy status indicator during programming, with status valid after minimum TCSL (250 ns) and detectable via polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8 or 1024 × 16, selectable via ORG pin) |
| VCC range | 1.8 V to 5.5 V - supports single-supply operation across battery-powered and mixed-voltage systems |
| Clock frequency | Up to 3 MHz at VCC ≥ 4.5 V - enables fast configuration reads without external wait states |
| Endurance | 1,000,000 erase/write cycles - suitable for firmware parameter logging with frequent updates |
| Data retention | Greater than 200 years at 25°C - ensures long-term reliability in unattended equipment |
| Operating temp | –40°C to +85°C (Industrial grade) - validated for deployment in industrial controllers and automotive ECUs |
| Interface | 3-wire Microwire-compatible serial - minimal GPIO usage; no SPI mode bits or CS polarity ambiguity |
Pinout & Package
8-pin MSOP (150 mil) package with exposed pad option; pin 1 marked by laser; RoHS-compliant 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 instructions |
| CLK | Serial Clock | Rising-edge synchronized I/O; clock can pause mid-transfer; no clock required during self-timed write |
| DI | Data Input | Accepts Start bit, opcode, address, and data; tied high with CS to initiate communication |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all digital and analog circuitry; must be low-impedance connection |
| ORG | Organization Select | Logic high → 1024×16; logic low → 2048×8; must be statically tied, not floated |
| PE | Program Enable | Logic high required to permit ERASE/WRITE; tie to VSS to permanently disable writes |
| VCC | Power Supply | 1.8–5.5 V input; internal POR triggers at ~1.5 V; must exceed 4.5 V for ERAL/WRAL operation |
Key Features
| Feature | Design Value |
|---|---|
| Word-size configurability | Single hardware pin (ORG) selects 8-bit or 16-bit data width - eliminates need for separate part numbers or firmware adaptation |
| Hardware write protection | Dedicated PE pin enables system-level lockout of memory writes - prevents corruption during power transients or software faults |
| Auto-erase before write | Self-timed erase integrated into each WRITE cycle - guarantees clean page state without explicit ERASE command overhead |
| Ready/Busy polling | DO pin reflects real-time programming status - allows host MCU to avoid fixed delays and optimize throughput |
| Power-on data protection | Internal voltage detector disables writes below ~1.5 V - prevents partial writes during brown-out conditions |
Applications
| Industrial Sensor Calibration | Automotive ECU Configuration |
|---|---|
Use Scenario: Storing factory-trimmed sensor offset/gain coefficients and runtime calibration updates in programmable industrial transmitters. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed infrequently via microcontroller's Microwire peripheral during commissioning or field service. Use Value: Eliminates need for external trimming components; enables field recalibration without hardware change; 200-year retention ensures lifetime validity. | Use Scenario: Holding vehicle-specific settings (e.g., throttle map variants, CAN node ID, immobilizer keys) in engine control units. IC Role / Device Role / Timing Role: Secure, low-power configuration store interfaced directly to ECU's main MCU over dedicated 3-wire bus. Use Value: PE pin allows permanent write-disable after programming; ORG flexibility accommodates legacy 8-bit or modern 16-bit parameter sets. |
| Medical Device Parameter Storage | Consumer Appliance Settings |
Use Scenario: Retaining user preferences (e.g., therapy modes, alarm thresholds) and regulatory audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Microwire EEPROM accessed during boot and on-demand by safety-certified firmware. Use Value: 1M endurance supports daily log entries over 10+ years; industrial temp rating covers clinical environment variations. | Use Scenario: Saving cooking presets, timer values, and display brightness in smart ovens and washing machines. IC Role / Device Role / Timing Role: Low-cost, space-constrained nonvolatile memory sharing PCB real estate with MCU in cost-sensitive white goods. Use Value: MSOP-8 footprint minimizes board area; 1.8 V min VCC enables direct connection to 2-cell Li-ion or 3.3 V rails without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86CT-I/MS | Same pinout and package; requires VCC ≥ 2.5 V; lacks PE pin; ORG pin functional | No hardware write-disable capability; suited for systems with software-only protection or trusted boot environments | Select if lower voltage operation (2.5 V) suffices and PE-based hardware lockout is unnecessary |
| 93AA86AT-I/MS | Same 1.8–5.5 V range and MSOP-8 package; fixed 8-bit organization; no ORG or PE pins | Simpler interface (6 pins vs. 8); no configuration flexibility or hardware write protection | Select for cost-optimized designs needing only 8-bit access and no runtime reconfiguration |
Compared with 93LC86CT-I/MS, the 93AA86CT-I/MS adds PE-based hardware write protection and wider VCC tolerance; compared with 93AA86AT-I/MS, it provides ORG-selectable word width and enhanced security via PE, justifying its use in field-upgradable or safety-critical systems.
Availability
93AA86CT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, automotive ECU configuration, and medical device parameter storage requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for 93AA86CT-I/MS 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 93XX86 series was designed specifically for low-power, space-constrained embedded systems requiring reliable, pin-efficient serial EEPROM with flexible data-width configuration and robust write-protection mechanisms.
FAQ
What is the function of the ORG pin on the 93AA86CT-I/MS?
The ORG pin on the 93AA86CT-I/MS selects memory word size: logic high configures 1024 × 16-bit organization, logic low configures 2048 × 8-bit organization. It must be statically tied to VCC or VSS - floating is not permitted. This pin is exclusive to 'C'-suffix variants like the 93AA86CT-I/MS and is absent on 'A' and 'B' versions.
Does the 93AA86CT-I/MS require an external pull-up resistor on the DO pin?
No, the 93AA86CT-I/MS does not require an external pull-up on DO. The DO pin actively drives high/low during READ and Ready/Busy status reporting, and enters High-Z when inactive. However, if DI and DO are shorted (shared bus), a current-limiting resistor is recommended to prevent bus conflict during the dummy zero phase of READ.
What is the minimum VCC required for ERAL and WRAL operations on the 93AA86CT-I/MS?
The 93AA86CT-I/MS requires VCC ≥ 4.5 V to execute ERAL (Erase All) or WRAL (Write All) commands. These operations are disabled below this threshold to ensure reliable charge pump operation and full-array programming integrity. Standard READ, WRITE, and ERASE functions remain operational down to 1.8 V.
How is write protection implemented on the 93AA86CT-I/MS?
Write protection on the 93AA86CT-I/MS is implemented via two independent mechanisms: (1) the Program Enable (PE) pin must be held high to allow any ERASE or WRITE command, and (2) the Erase/Write Enable (EWEN) instruction must be issued before each programming sequence. Both conditions must be satisfied - tying PE low permanently disables writes regardless of EWEN state.
Is the 93AA86CT-I/MS compatible with standard SPI interfaces?
The 93AA86CT-I/MS uses a Microwire-compatible 3-wire interface (CS, CLK, DI/DO), not standard SPI. It lacks separate MISO/MOSI lines and operates with half-duplex, instruction-driven transfers. While some SPI peripherals can emulate Microwire timing, true SPI mode (CPOL/CPHA) is not supported - direct SPI master connection requires protocol translation or firmware bit-banging.
93AA86CT-I/MS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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, 1K x 16
- 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:
- 8-MSOP
93AA86CT-I/MS FAQ
1.How can I place an order for 93AA86CT-I/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA86CT-I/MS 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 93AA86CT-I/MS reliable?
The price and inventory of 93AA86CT-I/MS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA86CT-I/MS is usually 5 days.
3.What payment methods are accepted for 93AA86CT-I/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA86CT-I/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA86CT-I/MS?
93AA86CT-I/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA86CT-I/MS 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 93AA86CT-I/MS?
For technical support, including 93AA86CT-I/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA86CT-I/MS requirements.
6.How does Aetrix verify that 93AA86CT-I/MS is sourced from the original manufacturer or authorized distributors?
All 93AA86CT-I/MS 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 93AA86CT-I/MS meets industry standards.
7.What is the process for return or replacement of 93AA86CT-I/MS?
All 93AA86CT-I/MS units undergo pre-shipment inspection (PSI). If there is an issue with 93AA86CT-I/MS, 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 93AA86CT-I/MS part is unused and in its original packaging.
Return procedure for 93AA86CT-I/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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