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Microchip Technology 93AA86B-I/SN
- Part No.:
- 93AA86B-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
93AA86B-I/SN.pdf
- Description:
- IC EEPROM 16KBIT MICROWIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,691
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Product details
Overview
93AA86B-I/SN from Microchip Technology is a 16K-bit, 1024 × 16-bit organization serial EEPROM with Microwire-compatible 3-wire interface, operating from 1.8V to 5.5V across -40°C to +85°C. It features self-timed erase/write cycles, 1,000,000 endurance cycles, >200-year data retention, and industrial-temperature qualification. Used for configuration storage in embedded controllers and sensor calibration registers.
For engineers reviewing the 93AA86B-I/SN datasheet, 93AA86B-I/SN pinout, 93AA86B-I/SN application, or 93AA86B-I/SN equivalent, key selection criteria include VCC range (1.8–5.5V), x16 word organization, absence of ORG/PE pins, industrial temperature rating, and SOIC-8 package compatibility with legacy board layouts.
Technical Context
This device implements a synchronous serial Microwire protocol with CS/CLK/DI/DO signaling. All instructions - READ, WRITE, ERASE, ERAL, EWEN, EWDS - are clocked on CLK rising edges, with opcode/address/data shifted in via DI and status/data returned via DO. Ready/Busy polling is supported through DO during erase/write operations.
It uses CMOS floating-gate technology with on-chip charge-pump circuitry for write/erase. Power-on/off protection prevents spurious writes below VCC threshold (1.5V typ). No external high-voltage programming supply is required; all operations execute at core VCC voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 Kbit (1024 × 16-bit organization) |
| VCC range | 1.8V to 5.5V - supports single-supply operation across battery-powered and 3.3V/5V logic systems |
| Endurance | 1,000,000 erase/write cycles - enables frequent field updates without wear-out concerns |
| Data retention | Greater than 200 years at 25°C - ensures long-term reliability in unattended equipment |
| Operating temperature | -40°C to +85°C (Industrial grade) - qualified for industrial control and automotive under-hood auxiliary modules |
| Write cycle time | 5 ms typical (TWC) - defines minimum interval between successive write commands |
| Max clock frequency | 3 MHz at VCC ≥ 4.5V - sets upper bound for serial transaction throughput |
Pinout & Package
8-pin SOIC (SN) package with standard 150-mil width, Pb-free Matte Tin finish, and JEDEC-compliant footprint. Pin 1 marked by laser dot; pin 1 identifier corner matches industry-standard orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-high enable signal; device enters Standby mode when low, but completes ongoing write/erase before sleeping |
| CLK | Serial Clock | Synchronizes all data transfers; rising edge clocks in opcode/address/data and clocks out status/data |
| DI | Data Input | Serial input for Start bit, instruction opcodes, addresses, and write data; no internal pull-up/down |
| DO | Data Output | Tri-state output delivering read data or Ready/Busy status (low = busy); high-Z when CS low or not reading |
| VSS | Ground | Reference return path for all digital and analog functions; must be low-impedance connection |
| VCC | Power Supply | Core supply for logic and memory array; internal voltage detector disables writes below ~1.5V |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed erase/write | Eliminates need for external timing control or status polling loops - reduces firmware overhead and CPU load |
| Auto-Erase before Write | Guarantees clean write operation without separate erase command - simplifies firmware logic |
| Power-on/off data protection | Hardware-enforced write inhibition below VCC threshold - prevents corruption during brown-out or hot-swap |
| Industry-standard 3-wire interface | Direct drop-in replacement for legacy Microwire EEPROMs - preserves existing driver code and PCB layout |
| Sequential read function | Enables burst reads across consecutive addresses with single CS assertion - improves read throughput efficiency |
Applications
| Industrial Sensor Calibration | Embedded Controller Configuration |
|---|---|
Use Scenario: Storing factory-trimmed gain/offset coefficients and linearization tables for analog sensor front-ends in PLC I/O modules. IC Role / Device Role / Timing Role: Nonvolatile configuration register accessed during power-up initialization and occasional field recalibration. Use Value: Enables accurate analog measurement without requiring external trimming components or host MCU intervention during normal operation. | Use Scenario: Holding boot parameters, network settings, and user-defined operational modes in HVAC controller mainboards. IC Role / Device Role / Timing Role: Serial configuration store interfaced to MCU SPI-compatible peripheral using bit-banged Microwire protocol. Use Value: Provides robust, low-power, pin-efficient storage for critical system state that survives power loss and firmware updates. |
| Medical Device Settings Backup | Automotive Body Control Module |
Use Scenario: Retaining user-prescribed therapy parameters and usage logs in portable infusion pumps and diagnostic handhelds. IC Role / Device Role / Timing Role: Safety-critical nonvolatile memory holding regulatory-compliant device settings with verified write integrity. Use Value: Meets IEC 62304 requirements for data persistence and integrity in Class II medical electronics. | Use Scenario: Storing door lock logic states, mirror position presets, and lighting profiles in automotive BCMs operating in under-dash environments. IC Role / Device Role / Timing Role: Industrial-grade EEPROM supporting extended temperature range and vibration-resistant mounting in vehicle interior ECUs. Use Value: Qualified for -40°C to +85°C operation with 200-year retention - eliminates premature failure in sealed, thermally constrained enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 93LC86B-I/SN | Same 1024×16-bit organization, but 2.5–5.5V VCC range; lacks 1.8V support | Not suitable for 1.8V battery-powered designs; otherwise identical pinout and instruction set | Select if system VCC never drops below 2.5V and cost optimization is prioritized over ultra-low-voltage operation |
| AT25128B-MAHL-T | 128K-bit SPI EEPROM (16K×8), 1.8–5.5V, 20 MHz SPI interface; different protocol and density | Requires SPI driver adaptation; higher capacity but incompatible instruction set and timing | Choose only when migrating to SPI architecture and needing larger storage; not a drop-in replacement |
Compared with 93LC86B-I/SN, the 93AA86B-I/SN extends low-voltage operation to 1.8V while maintaining identical pinout and timing - enabling direct substitution in energy-sensitive designs. Versus AT25128B-MAHL-T, it retains Microwire compatibility and lower gate count but offers half the density and slower interface speed.
Availability
93AA86B-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, embedded controller configuration, and medical device settings backup requiring stable component supply and long-term lifecycle assurance.
Supply support for 93AA86B-I/SN 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 93XX series EEPROMs were designed specifically for reliable, low-power, serial nonvolatile storage in space-constrained embedded systems - emphasizing simplicity, wide VCC tolerance, and industrial temperature resilience.
FAQ
What is the memory organization of the 93AA86B-I/SN?
The 93AA86B-I/SN has a fixed 1024 × 16-bit organization - meaning it stores 1024 words, each 16 bits wide, for a total of 16,384 bits (16 Kbit). Unlike 'C' variants, it does not have an ORG pin; its x16 structure is hardwired and requires no external configuration.
Does the 93AA86B-I/SN support 1.8V operation?
Yes, the 93AA86B-I/SN operates across 1.8V to 5.5V, making it compatible with modern low-voltage microcontrollers and battery-powered systems. Its power-on reset threshold is ~1.5V, ensuring write protection during brown-out conditions at 1.8V nominal supply.
Is the 93AA86B-I/SN pin-compatible with other 93XX86 devices in SOIC-8 package?
Yes - the 93AA86B-I/SN shares identical SOIC-8 pinout (CS, CLK, DI, DO, VSS, VCC) with all 93XX86A/B variants in SN package. 'C' versions add ORG and PE pins (pins 6 and 7), so direct substitution is safe only among A/B types.
What is the maximum clock frequency supported by the 93AA86B-I/SN?
The 93AA86B-I/SN supports up to 3 MHz clock frequency when VCC is 4.5V–5.5V. At 2.5V–4.5V, max clock is 2 MHz; at 1.8V–2.5V, it is 1 MHz - scaling ensures timing margin across full VCC range per AC specifications.
How does the 93AA86B-I/SN indicate readiness after a write operation?
The 93AA86B-I/SN asserts Ready/Busy status on the DO pin: DO = low indicates active erase/write in progress; DO = high signals completion. This status is valid only when CS is high and TCSL (≥250 ns) has elapsed since CS went low - enabling simple polling-based firmware flow control.
93AA86B-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 16Kbit
- Memory Organization:
- 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-SOIC
93AA86B-I/SN FAQ
1.How can I place an order for 93AA86B-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 93AA86B-I/SN 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 93AA86B-I/SN reliable?
The price and inventory of 93AA86B-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 93AA86B-I/SN is usually 5 days.
3.What payment methods are accepted for 93AA86B-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 93AA86B-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 93AA86B-I/SN?
93AA86B-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 93AA86B-I/SN 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 93AA86B-I/SN?
For technical support, including 93AA86B-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 93AA86B-I/SN requirements.
6.How does Aetrix verify that 93AA86B-I/SN is sourced from the original manufacturer or authorized distributors?
All 93AA86B-I/SN 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 93AA86B-I/SN meets industry standards.
7.What is the process for return or replacement of 93AA86B-I/SN?
All 93AA86B-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 93AA86B-I/SN, 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 93AA86B-I/SN part is unused and in its original packaging.
Return procedure for 93AA86B-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
93AA86B-I/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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