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Microchip Technology 93AA86CT-I/ST
- Part No.:
- 93AA86CT-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93AA86CT-I/ST.pdf
- Description:
- IC EEPROM 16KBIT MIC WIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,309
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Product details
Overview
The 93AA86CT-I/ST from Microchip Technology Inc. is a 16 Kbit low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, industrial temperature rating (–40°C to +85°C), and configurable 8-/16-bit word organization via the ORG pin. It features program enable (PE) write protection, self-timed erase/write cycles, and 1,000,000 endurance cycles - deployed in embedded system configuration storage, sensor calibration data retention, and power-management parameter backup.
For engineers reviewing the 93AA86CT-I/ST datasheet, 93AA86CT-I/ST pinout, 93AA86CT-I/ST application, or 93AA86CT-I/ST equivalent, key selection considerations include its dual-word-size flexibility (via ORG), hardware write-protection (PE pin), industrial-grade reliability, and TSSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
This device implements a synchronous serial Microwire protocol with CS/CLK/DI/DO signaling and supports both x8 (ORG = low) and x16 (ORG = high) memory mapping. Its internal architecture includes an address decoder, mode decode logic, and output buffer, enabling sequential read, ERAL (Erase All), WRAL (Write All), and status polling via DO pin.
Power-on data protection is enforced by a VCC detect circuit (VPOR = 1.5 V typical), and write operations require prior EWEN command execution followed by PE = high. Standby current is ≤1 µA at VCC = 2.5–5.5 V, supporting battery-backed applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8 or 1024 × 16, selectable via ORG pin) |
| Supply voltage | 1.8–5.5 V - enables direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers |
| Endurance | 1,000,000 erase/write cycles - ensures long-term field reliability in frequent-update scenarios |
| Data retention | >200 years at 25°C - guarantees nonvolatile storage integrity across product lifecycles |
| Write cycle time | 5 ms (TWC) - defines minimum delay between successive write commands |
| Max clock frequency | 3 MHz at VCC ≥ 4.5 V - sets upper limit for serial transaction throughput |
| Standby current | ≤1 µA - minimizes quiescent power draw in sleep-mode systems |
Pinout & Package
Package: 8-lead TSSOP (ST), Pb-free Matte Tin finish, body dimensions 4.4 mm × 3.0 mm × 1.2 mm.
| 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 | Synchronizes all data transfers; rising edge clocks in opcode/address/data and clocks out DO |
| DI | Data Input | Receives start bit, instruction opcodes, addresses, and write data; shares no internal pull-up/down |
| DO | Data Output / Status | Outputs read data or Ready/Busy signal (low = busy); enters High-Z when CS is low |
| VSS | Ground | Reference return path for all I/O and core logic; requires low-impedance connection |
| ORG | Organization select | High = 1024 × 16-bit mode; low = 2048 × 8-bit mode; must be statically tied, not floated |
| PE | Program Enable | High = write enabled; low = full array write-protection; mandatory high before WRITE/WRAL |
| VCC | Power supply | 1.8–5.5 V input; internal POR circuit activates below 1.5 V to inhibit writes |
Key Features
| Feature | Design Value |
|---|---|
| Word-size configurability | Hardware-selectable 8-bit or 16-bit organization via ORG pin - eliminates firmware rework for memory-width changes |
| Hardware write protection | Dedicated PE pin disables all erase/write functions when pulled low - prevents accidental corruption during brown-out or noise events |
| Auto-erase before write | Self-timed erase integrated into every WRITE/WRAL cycle - removes need for separate ERASE command in most use cases |
| Ready/Busy status reporting | DO pin doubles as status indicator during programming - enables polling-based flow control without external timers |
| Power-on data protection | Internal voltage detector (VPOR = 1.5 V) blocks all writes until VCC stabilizes - ensures data integrity during power ramp-up |
Applications
| Industrial Sensor Calibration Storage | Embedded System Configuration Backup |
|---|---|
Use Scenario: Storing factory-trimmed offset/gain coefficients for analog sensor front-ends in HVAC controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter register accessed at power-up and during field recalibration via SPI-compatible Microwire interface. Use Value: Maintains calibrated accuracy over 200+ years without battery support; 1M endurance tolerates daily recalibration cycles for 27 years. | Use Scenario: Retaining user-selected UI language, display brightness, and network settings in medical handheld devices. IC Role / Device Role / Timing Role: Serial configuration store interfaced to ARM Cortex-M0+ MCU using 3-wire GPIO bit-banged Microwire protocol. Use Value: 1.8 V operation matches MCU I/O voltage; TSSOP-8 footprint fits tight board space; PE pin prevents config loss during ESD transients. |
| Power Management Unit Parameter Storage | Automotive Body Control Module Settings |
Use Scenario: Holding adaptive battery charge profiles and thermal derating thresholds in portable power tools. IC Role / Device Role / Timing Role: Low-quiescent-current (≤1 µA) EEPROM storing runtime-adjusted parameters updated during charging cycles. Use Value: Sub-µA standby draw extends shelf life; 5 ms write time allows fast save on tool shutdown; industrial temp range covers tool operating envelope. | Use Scenario: Saving seat position memory, mirror fold/unfold preferences, and lighting dimming curves in BCMs. IC Role / Device Role / Timing Role: Configurable 8/16-bit storage element interfaced to 8-bit automotive MCU via dedicated Microwire peripheral. Use Value: ORG pin enables reuse of same BOM across 8-bit (legacy) and 16-bit (newer) MCU platforms; RoHS-compliant Pb-free finish meets automotive ELV directive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93AA86C-I/MS | Same die, MSOP-8 package (3.0 × 3.0 mm); identical electrical specs and pinout | Smaller footprint than TSSOP-8; higher thermal resistance; requires different land pattern | Select for tighter board area constraints where thermal performance permits |
| 93LC86CT-I/ST | 2.5–5.5 V VCC range; lacks PE pin; otherwise identical pinout, timing, and instruction set | Cannot provide hardware-level write protection; unsuitable where robustness against voltage glitch-induced writes is required | Choose only if system already enforces software write-locking and operates ≥2.5 V |
Compared with 93AA86CT-I/ST, the 93AA86C-I/MS offers identical functionality in a smaller MSOP package but with reduced thermal dissipation, while the 93LC86CT-I/ST omits the PE pin and has higher minimum VCC - making the 93AA86CT-I/ST the sole choice for 1.8 V operation with hardware write lock.
Availability
93AA86CT-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration storage, embedded system configuration backup, and power management unit parameter storage requiring stable component supply across multi-year production cycles.
Supply support for 93AA86CT-I/ST 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, serving industrial, automotive, consumer, and communications markets.
The 93AA86CT-I/ST belongs to Microchip's legacy 93XX serial EEPROM family, designed specifically for cost-sensitive, low-power, nonvolatile data storage in resource-constrained embedded systems with strict reliability and longevity requirements.
FAQ
What is the memory organization of the 93AA86CT-I/ST, and how is it selected?
The 93AA86CT-I/ST supports two memory organizations: 2048 × 8-bit (x8) or 1024 × 16-bit (x16). Selection is controlled by the ORG pin - tied to VSS for x8 mode, or to VCC for x16 mode. This hardware-configurable feature allows one 93AA86CT-I/ST part to serve multiple system architectures without firmware changes, and is fully documented in DS21797L Section 2.0 and Table 1-3/1-4.
Does the 93AA86CT-I/ST require external circuitry for write protection?
No - the 93AA86CT-I/ST includes a dedicated Program Enable (PE) pin that provides hardware-level write protection. When PE is held low, all erase and write operations are inhibited regardless of command sequence or VCC level. This eliminates reliance on software locks or external logic, and is specified in DS21797L Section 3.6 and the Device Selection Table.
What is the minimum VCC required for reliable operation of the 93AA86CT-I/ST?
The 93AA86CT-I/ST operates reliably from 1.8 V to 5.5 V. Its internal power-on reset (POR) circuit blocks write operations below ~1.5 V (VPOR parameter, DS21797L Table 1-1 D11), ensuring data integrity during power ramp-up. This 1.8 V minimum enables direct interfacing with modern ultra-low-voltage MCUs and battery-powered systems.
Can the 93AA86CT-I/ST be used in place of the 93LC86CT-I/ST?
The 93AA86CT-I/ST is not a drop-in replacement for the 93LC86CT-I/ST due to differences in VCC range (1.8–5.5 V vs. 2.5–5.5 V) and the presence of the PE pin. While both share identical pinout, instruction set, and TSSOP-8 packaging, the 93AA86CT-I/ST adds hardware write protection and lower-voltage capability - requiring validation of system-level voltage margins and PE pin handling before substitution.
How does the 93AA86CT-I/ST indicate readiness after a write operation?
The 93AA86CT-I/ST uses the DO pin to signal Ready/Busy status during erase and write cycles. After initiating a WRITE or WRAL command, DO goes low and remains low until completion; it transitions high when ready. This status is polled by holding CS high ≥250 ns after TCSL, as defined in DS21797L Figures 2-6 and 2-7 and Section 2.8.
93AA86CT-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm 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-TSSOP
93AA86CT-I/ST FAQ
1.How can I place an order for 93AA86CT-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA86CT-I/ST 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/ST reliable?
The price and inventory of 93AA86CT-I/ST 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/ST is usually 5 days.
3.What payment methods are accepted for 93AA86CT-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA86CT-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA86CT-I/ST?
93AA86CT-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA86CT-I/ST 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/ST?
For technical support, including 93AA86CT-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA86CT-I/ST requirements.
6.How does Aetrix verify that 93AA86CT-I/ST is sourced from the original manufacturer or authorized distributors?
All 93AA86CT-I/ST 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/ST meets industry standards.
7.What is the process for return or replacement of 93AA86CT-I/ST?
All 93AA86CT-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93AA86CT-I/ST, 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/ST part is unused and in its original packaging.
Return procedure for 93AA86CT-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA86CT-I/ST Tags
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