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Microchip Technology 93AA86CT-I/MC
- Part No.:
- 93AA86CT-I/MC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
93AA86CT-I/MC.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,016
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Product details
Overview
93AA86CT-I/MC from Microchip Technology Inc. is a 16 Kbit low-voltage serial EEPROM with Microwire-compatible 3-wire interface, supporting configurable 8-bit or 16-bit word organization via the ORG pin, 1.8–5.5 V operation, and industrial temperature range (–40°C to +85°C). It features Program Enable (PE) pin for full-array write protection, self-timed erase/write cycles, and automatic ERAL before WRAL - used in embedded system configuration storage, sensor calibration data retention, and firmware parameter backup.
For engineers reviewing the 93AA86CT-I/MC datasheet, 93AA86CT-I/MC pinout, 93AA86CT-I/MC application, or 93AA86CT-I/MC equivalent, key selection considerations include VCC voltage compatibility (1.8–5.5 V), ORG/PE pin control logic, Ready/Busy status polling via DO, and DFN-8 package thermal and layout constraints for space-constrained industrial PCBs.
Technical Context
The 93AA86CT-I/MC implements a synchronous serial Microwire interface with CS, CLK, DI, and DO signals, where instruction execution begins on detection of a Start condition (CS high + DI high at CLK rising edge). Memory organization is dynamically selected: ORG = VSS enables 2048 × 8-bit mode; ORG = VCC enables 1024 × 16-bit mode.
Write operations require prior EWEN command and PE = VCC; ERAL (Erase All) and WRAL (Write All) are self-timed with fixed durations (6 ms and 15 ms respectively at VCC ≥ 4.5 V), and DO provides real-time Ready/Busy status during all programming cycles when CS is reasserted after TCSL ≥ 250 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8 or 1024 × 16) |
| VCC operating range | 1.8 V to 5.5 V - supports single-supply battery-powered and mixed-voltage systems |
| Endurance | 1,000,000 erase/write cycles - suitable for frequent field-updatable parameter storage |
| Data retention | >200 years at 25°C - ensures long-term reliability in unpowered storage |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - defines maximum serial transaction throughput |
| Write cycle time | 5 ms (erase/write), 6 ms (ERAL), 15 ms (WRAL) - determines minimum latency for bulk operations |
| Standby current | 1 µA (I-temp) - enables ultra-low-power sleep modes in portable devices |
Pinout & Package
Package: 8-lead 2×3 mm DFN (MC), exposed pad (may be connected to VSS or left floating), Pb-free Matte Tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable; must be held low ≥250 ns between instructions; deselects device into standby |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| DI | Data Input | Receives Start bit, opcode, address, and write data; requires external pull-down if shared with DO |
| DO | Data Output / Status | Outputs read data or Ready/Busy (low = busy); enters High-Z on CS falling edge |
| VSS | Ground | Reference for all I/O and internal circuitry; connects to exposed pad in DFN |
| ORG | Organization select | Logic level sets word size: VSS → 8-bit, VCC → 16-bit; must not float |
| PE | Program Enable | Write-enable control: VCC permits programming, VSS blocks all writes - critical for field safety |
| VCC | Power supply | 1.8–5.5 V input; internal POR triggers at ~1.5 V; powers all logic and memory array |
Key Features
| Feature | Design Value |
|---|---|
| Configurable word size | Single hardware pin (ORG) selects 8-bit or 16-bit interface without firmware change |
| Hardware write protection | Dedicated PE pin disables all erase/write functions when tied to ground - prevents accidental corruption |
| Auto-erase before write | Self-timed erase integrated into every WRITE/WRAL cycle - eliminates separate erase step |
| Ready/Busy status signaling | DO pin doubles as status indicator during programming - enables polling without extra pins or interrupts |
| Power-on/off data protection | Internal circuitry inhibits writes below VCC threshold (~1.5 V) - prevents partial writes during brownout |
Applications
| Industrial PLC Configuration Storage | Medical Sensor Calibration Data Retention |
|---|---|
Use Scenario: Storing I/O mapping, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile configuration EEPROM interfaced to microcontroller via Microwire; accessed during boot and runtime updates. Use Value: Ensures deterministic startup behavior after power loss and supports field recalibration without firmware reflashing. | Use Scenario: Holding factory-trimmed offset/gain coefficients and patient-specific calibration constants in portable ECG or glucose monitoring devices. IC Role / Device Role / Timing Role: Low-power serial EEPROM storing precision analog calibration data; accessed during sensor initialization sequence. Use Value: Maintains measurement accuracy over 10+ years without battery-backed SRAM, reducing BOM cost and board area. |
| Automotive Body Control Module Settings | Smart Energy Meter Firmware Parameters |
Use Scenario: Saving user preferences (window position, mirror angle, lighting profiles) and fault logs in automotive body control units. IC Role / Device Role / Timing Role: Industrial-temp EEPROM interfaced to 8-bit MCU; withstands under-hood thermal cycling and ESD events. Use Value: Guarantees settings persistence across vehicle battery disconnects and meets AEC-Q100 stress requirements via robust packaging (DFN-MC). | Use Scenario: Storing tariff schedules, demand-response thresholds, and communication credentials in ANSI C12.22-compliant smart meters. IC Role / Device Role / Timing Role: Secure, long-life EEPROM used for infrequently updated but mission-critical operational parameters. Use Value: Achieves >200-year data retention and 1M endurance - exceeds 20-year meter lifetime with margin for firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA86CT-I/MS | Same electrical specs and pinout, but in 8-lead MSOP package (3×3 mm, 0.65 mm pitch) | Higher thermal resistance and less efficient heat dissipation than DFN-MC; no exposed pad | Select for legacy MSOP footprint compatibility or hand-soldering preference |
| 93LC86CT-I/MC | VCC range 2.5–5.5 V (vs. 1.8–5.5 V); identical pinout, ORG/PE functionality, and DFN-8 package | Not suitable for 1.8 V or 2.0 V systems; otherwise drop-in replacement where higher VCC min is acceptable | Select when system VCC never falls below 2.5 V and extended low-voltage operation is unnecessary |
Compared with 93AA86CT-I/MC, the 93AA86CT-I/MS offers identical functionality in a larger MSOP package better suited for prototyping, while 93LC86CT-I/MC trades 1.8 V support for tighter VCC regulation tolerance - both serve distinct voltage and thermal design constraints without altering interface logic.
Availability
93AA86CT-I/MC is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical sensor calibration data retention, and automotive body control module settings requiring stable component supply across extended product lifecycles.
Supply support for 93AA86CT-I/MC 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 components, and nonvolatile memory solutions, headquartered in Chandler, Arizona.
The 93XX86 family was designed specifically for low-power, serially interfaced nonvolatile data storage in space- and energy-constrained embedded systems, emphasizing hardware-configurable organization and robust write-protection.
FAQ
What is the function of the ORG pin on the 93AA86CT-I/MC?
The ORG pin on the 93AA86CT-I/MC selects memory word size: when tied to VSS, it configures the device as 2048 × 8-bit; when tied to VCC, it configures as 1024 × 16-bit. This hardware-selectable organization allows one 93AA86CT-I/MC part number to serve both byte-oriented and word-oriented microcontroller interfaces without firmware modification. The ORG pin must be held at a valid logic level at all times - floating is not permitted.
How does the PE pin protect memory on the 93AA86CT-I/MC?
The PE (Program Enable) pin on the 93AA86CT-I/MC provides hardware-level write inhibition: tying PE to VSS blocks all erase and write operations, including ERAL and WRAL, regardless of instruction sequence or EWEN state. This is a physical gate - no software bypass exists. For secure field deployment, PE should be hardwired to ground unless dynamic reprogramming is required, making the 93AA86CT-I/MC resistant to accidental or malicious corruption.
What is the minimum VCC voltage required for reliable operation of the 93AA86CT-I/MC?
The 93AA86CT-I/MC requires VCC ≥ 1.8 V for full specification compliance across the industrial temperature range (–40°C to +85°C). Below ~1.5 V, internal power-on reset circuitry disables all programming functions to prevent partial writes. Read operations may function down to ~1.7 V in some conditions, but data integrity is not guaranteed outside the 1.8–5.5 V range specified in the DS21797L datasheet for the 93AA86CT-I/MC.
Can the 93AA86CT-I/MC be used in a 3-wire bus with multiple devices?
Yes, the 93AA86CT-I/MC supports multi-drop 3-wire Microwire buses using individual CS lines - each device requires its own dedicated Chip Select signal. The CLK and DI/DO lines may be shared across multiple 93AA86CT-I/MC units, but DO outputs must be externally wired-OR'd (e.g., with pull-up resistors) to avoid bus contention. No built-in addressing or daisy-chain capability exists; device selection is purely CS-driven.
What package type does the 'MC' suffix indicate for the 93AA86CT-I/MC?
For the 93AA86CT-I/MC, the 'MC' suffix denotes the 8-lead 2×3 mm DFN (Dual Flat No-lead) package with an exposed thermal pad. This package offers superior thermal performance and smaller footprint than SOIC or MSOP alternatives, and is RoHS-compliant with Matte Tin (Sn) finish. The exposed pad may be connected to VSS for improved heat dissipation or left floating per PCB layout requirements - confirmed in Microchip's DS21797L-page 26 package drawing.
93AA86CT-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- 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, 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-DFN (2x3)
93AA86CT-I/MC FAQ
1.How can I place an order for 93AA86CT-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA86CT-I/MC 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/MC reliable?
The price and inventory of 93AA86CT-I/MC 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/MC is usually 5 days.
3.What payment methods are accepted for 93AA86CT-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA86CT-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA86CT-I/MC?
93AA86CT-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA86CT-I/MC 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/MC?
For technical support, including 93AA86CT-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA86CT-I/MC requirements.
6.How does Aetrix verify that 93AA86CT-I/MC is sourced from the original manufacturer or authorized distributors?
All 93AA86CT-I/MC 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/MC meets industry standards.
7.What is the process for return or replacement of 93AA86CT-I/MC?
All 93AA86CT-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with 93AA86CT-I/MC, 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/MC part is unused and in its original packaging.
Return procedure for 93AA86CT-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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