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Microchip Technology 93AA86A-I/ST
- Part No.:
- 93AA86A-I/ST
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
93AA86A-I/ST.pdf
- Description:
- IC EEPROM 16KBIT MIC WIRE 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,826
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Product details
Overview
93AA86A-I/ST from Microchip Technology is a 16 Kbit (2048 × 8-bit) low-voltage serial EEPROM with Microwire-compatible 3-wire interface, 1.8–5.5 V supply range, and industrial temperature rating (–40°C to +85°C). It features self-timed erase/write cycles, 1,000,000 endurance cycles, >200-year data retention, and power-on/off data protection - deployed in embedded control systems for parameter storage and calibration data logging.
For engineers reviewing the 93AA86A-I/ST datasheet, 93AA86A-I/ST pinout, 93AA86A-I/ST application, or 93AA86A-I/ST equivalent, key selection criteria include its fixed 8-bit organization (no ORG pin), absence of PE pin, TSSOP-8 package compatibility, and support for sequential read and Ready/Busy status polling via DO pin.
Technical Context
The 93AA86A-I/ST implements a synchronous serial Microwire protocol using CS, CLK, DI, and DO signals. All instructions - READ, WRITE, ERASE, ERAL, EWEN, EWDS - are initiated by a Start bit (CS high + DI high on CLK rising edge), followed by opcode, address, and data bits clocked on CLK rising edges.
It operates exclusively in x8 mode (2048 × 8-bit), lacks ORG and PE pins (unlike 'C' variants), and relies on EWEN/EWDS commands for write enable/disable control. Ready/Busy status is reported on DO during programming, requiring CS reassertion after ≥250 ns low time (TCSL) to sample.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (2048 × 8-bit) - fixed word width, no ORG pin required |
| VCC range | 1.8 V to 5.5 V - supports wide-input battery-powered and mixed-voltage systems |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates in telemetry or configuration storage |
| Data retention | >200 years at 25°C - ensures long-term reliability without refresh in unpowered storage |
| Write cycle time | 5 ms max (TWC) - defines minimum interval between successive write operations |
| Max clock frequency | 3 MHz at VCC ≥4.5 V - sets upper limit for serial transaction throughput |
| Standby current | 1 µA (I-temp) - minimizes quiescent power in always-on embedded nodes |
Pinout & Package
93AA86A-I/ST is supplied in an 8-lead TSSOP (Thin Shrink Small Outline Package) with 0.65 mm lead pitch, JEDEC MO-153 compliant, Pb-free Matte Tin finish. Pin 1 is marked by laser dot; package footprint matches industry-standard SOIC-8 but with reduced height and narrower body.
| 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 | Synchronizes all data transfers; rising edge clocks in opcode/address/data; stoppable mid-sequence |
| DI | Data Input | Receives Start bit, opcodes, addresses, and write data; requires stable setup/hold timing relative to CLK |
| DO | Data Output / Status | Outputs read data or Ready/Busy status (low = busy); enters High-Z when CS low or not reading |
| VSS | Ground | Reference return path for all I/O and internal circuitry; must be low-impedance |
| VCC | Power Supply | 1.8–5.5 V supply; internal POR triggers at ~1.5 V; powers EEPROM core and interface logic |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates external timing control - internal logic manages auto-erase before write, reducing MCU firmware overhead |
| Ready/Busy status on DO | Enables polling-based write completion detection without interrupt or timer resources on host controller |
| Sequential read mode | Allows continuous address increment and data streaming while CS remains high - improves bulk read efficiency |
| Power-on/off data protection | Hardware lockout prevents writes when VCC drops below ~1.5 V - avoids corruption during brown-out or power ramp |
| Industry-standard 3-wire interface | Reduces PCB routing complexity vs. SPI; compatible with legacy Microwire controllers and simple GPIO bit-banging |
Applications
| Industrial Sensor Calibration | Medical Device Configuration |
|---|---|
Use Scenario: Storing factory-calibrated sensor offset/gain coefficients and user-adjusted compensation values in portable gas analyzers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during boot and runtime; retains data across power cycles and battery removal. Use Value: Enables traceable, field-updatable calibration without requiring reprogramming hardware - critical for ISO 13485 compliance. | Use Scenario: Holding patient-specific therapy parameters (e.g., infusion rate limits, alarm thresholds) in battery-powered insulin pumps. IC Role / Device Role / Timing Role: Secure, low-power configuration memory with guaranteed data integrity during unexpected shutdowns. Use Value: Meets IEC 62304 safety requirements for persistent settings storage with >200-year retention and 1M-cycle endurance. |
| Automotive Body Control Module | Smart Energy Metering |
Use Scenario: Recording seat/mirror position presets, lighting profiles, and door lock preferences in 12 V automotive BCMs. IC Role / Device Role / Timing Role: EEPROM interfaced directly to 8-bit microcontroller via 3-wire bus; withstands automotive voltage transients and temperature extremes. Use Value: Supports AEC-Q100 stress testing with industrial-grade temp range (–40°C to +85°C) and robust ESD protection (≥4 kV). | Use Scenario: Storing tariff schedules, demand-response event logs, and meter calibration constants in ANSI C12.20-certified smart meters. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile memory with write-protection via EWEN/EWDS commands and power-fail safe operation. Use Value: Ensures regulatory-compliant data persistence during grid outages and maintains audit trail integrity over 20+ year product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86A-I/ST | VCC range 2.5–5.5 V; identical pinout, 2048 × 8-bit organization, same TSSOP-8 package | Not suitable for sub-2.5 V systems (e.g., single-cell Li-ion); higher VCC min limits use in ultra-low-voltage designs | Select 93LC86A-I/ST only if system VCC never falls below 2.5 V and RoHS compliance is required |
| AT25020B-SSHL-T | SPI interface (4-wire), 2 K × 8-bit, 1.8–5.5 V, 20 MHz max clock, different command set and status reporting | Requires SPI-capable host; no Ready/Busy polling - uses WIP bit in status register; incompatible instruction protocol | Choose AT25020B-SSHL-T only when migrating to SPI infrastructure or needing faster 20 MHz clock rates |
Compared with 93LC86A-I/ST and AT25020B-SSHL-T, the 93AA86A-I/ST uniquely supports true 1.8 V operation with Microwire compatibility and integrated power-fail protection - making it optimal for cost-sensitive, low-pin-count, and battery-backed embedded systems where protocol simplicity and voltage flexibility are critical.
Availability
93AA86A-I/ST is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for 93AA86A-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 microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The 93XX series EEPROMs were designed specifically for reliable, low-power, serial nonvolatile storage in space-constrained embedded systems - emphasizing ease of integration, data integrity under voltage stress, and long-term field reliability.
FAQ
What is the memory organization of the 93AA86A-I/ST?
The 93AA86A-I/ST has a fixed 2048 × 8-bit (16 Kbit) organization. Unlike 'C' variants, it does not feature an ORG pin and therefore operates exclusively in x8 mode - eliminating external configuration logic and simplifying PCB layout for dedicated byte-oriented storage.
Does the 93AA86A-I/ST support write protection?
Yes, the 93AA86A-I/ST supports software-controlled write protection via the EWEN (Erase/Write Enable) and EWDS (Erase/Write Disable) instructions. It powers up in EWDS mode, requiring an explicit EWEN command before any ERASE or WRITE operation - preventing accidental writes during power-up or noise events.
What package type is used for the 93AA86A-I/ST?
The 93AA86A-I/ST is packaged in an 8-lead TSSOP (Thin Shrink Small Outline Package), designated by the 'ST' suffix. It measures 4.4 mm × 3.0 mm × 1.1 mm, features gull-wing leads, and is RoHS-compliant with Matte Tin (Sn) finish - compatible with standard SMT reflow profiles.
How is Ready/Busy status monitored on the 93AA86A-I/ST?
Ready/Busy status is monitored on the DO pin: DO = low indicates ongoing erase/write; DO = high indicates completion. To sample status, CS must be brought low for ≥250 ns (TCSL), then high again - after which DO reflects the current state. The pin returns to High-Z when CS is low or during non-read operations.
What is the maximum clock frequency supported by the 93AA86A-I/ST?
The 93AA86A-I/ST supports up to 3 MHz clock frequency when VCC is 4.5 V to 5.5 V. At 2.5 V ≤ VCC < 4.5 V, max frequency is 2 MHz; at 1.8 V ≤ VCC < 2.5 V, it is 1 MHz. These limits ensure reliable timing margin across the full operating voltage range of the 93AA86A-I/ST.
93AA86A-I/ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not 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:
- 8-TSSOP
93AA86A-I/ST FAQ
1.How can I place an order for 93AA86A-I/ST through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA86A-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 93AA86A-I/ST reliable?
The price and inventory of 93AA86A-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 93AA86A-I/ST is usually 5 days.
3.What payment methods are accepted for 93AA86A-I/ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA86A-I/ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA86A-I/ST?
93AA86A-I/ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA86A-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 93AA86A-I/ST?
For technical support, including 93AA86A-I/ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA86A-I/ST requirements.
6.How does Aetrix verify that 93AA86A-I/ST is sourced from the original manufacturer or authorized distributors?
All 93AA86A-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 93AA86A-I/ST meets industry standards.
7.What is the process for return or replacement of 93AA86A-I/ST?
All 93AA86A-I/ST units undergo pre-shipment inspection (PSI). If there is an issue with 93AA86A-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 93AA86A-I/ST part is unused and in its original packaging.
Return procedure for 93AA86A-I/ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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