93LC66A-I/ST Microchip Integrated Circuit (Small Outline Packages) In Stock
93LC66A-I/ST is a 4K-bit (512x8) 2.5V serial EEPROM by Microchip Technology in an 8-pin TSSOP package. Key specs: 2 MHz SPI interface, 1,000,000 write/erase endurance cycles, and over 200 years data retention. Available in stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 93LC66A-I/ST Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Exceptional 1,000,000 minimum erase/write cycle endurance ensuring long operational life in high-frequency write applications such as parameter storage and event logging
- 200+ year data retention guarantee providing permanent non-volatile storage reliability for configuration data across the full product lifecycle
- 2.5V operation with 2 MHz SPI interface enabling low-power serial communication compatible with modern 2.5V and 3.3V microcontroller systems
Applications
The 93LC66A-I/ST is ideal for storing calibration data, configuration parameters, and user preferences in embedded systems requiring reliable non-volatile memory with minimal pin count. Its high endurance of one million write cycles makes it well-suited for applications with frequent data updates such as smart meters, industrial sensors, and consumer appliance control panels. The compact 8-pin TSSOP package fits easily into space-constrained designs including wearable electronics, IoT nodes, and automotive body control modules.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | TSSOP-8 |
| Factory Lead Time | 12Weeks |
| YTEOL | 8 |
| Additional Feature | 1000000 ERASE/WRITE CYCLES MIN; DATA RETENTION > 200 YEARS |
| Clock Frequency-Max (fCLK) | 2MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Memory Density | 4096bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 512words |
| Number of Words Code | 512 |
| Operating Mode | SYNCHRONOUS |
| Organization | 512X8 |
| Output Characteristics | TOTEM POLE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Ready/Busy | YES |
| Reverse Pinout | NO |
| Screening Level | TS 16949 |
| Serial Bus Type | MICROWIRE |
| Standby Current-Max | 0.000001A |
| Supply Current-Max | 0.002mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Toggle Bit | YES |
| Write Cycle Time-Max (tWC) | 6ms |
| Write Protection | SOFTWARE |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Malaysia, Philippines, Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the memory capacity of the 93LC66A-I/ST?
The 93LC66A-I/ST is a 4K-bit EEPROM organized as 512 bytes (512x8 configuration), providing sufficient non-volatile storage for configuration parameters, calibration constants, user settings, and small data tables in embedded microcontroller applications.
How many write/erase cycles does the 93LC66A-I/ST support?
The 93LC66A-I/ST is rated for a minimum of 1,000,000 write/erase cycles per address location, ensuring reliable long-term operation even in applications that update stored data frequently, such as usage counters, event logs, or real-time parameter adjustments.
What is the data retention specification for the 93LC66A-I/ST?
Microchip specifies the 93LC66A-I/ST with a minimum data retention time of 200 years, meaning stored data remains valid for the entire useful life of virtually any product, providing confidence for safety-critical and long-field-life applications.
What interface does the 93LC66A-I/ST use and what is its clock speed?
The 93LC66A-I/ST uses a 3-wire SPI-compatible serial interface operating at up to 2 MHz clock frequency. This simple interface requires only three signal lines (CS, CLK, DI/DO), minimizing GPIO usage on the host microcontroller and simplifying PCB routing.
What package does the 93LC66A-I/ST come in?
The 93LC66A-I/ST is housed in an 8-pin TSSOP (Thin Shrink Small Outline Package), a compact surface-mount package with a 0.65 mm pin pitch. This small footprint is well suited for space-constrained PCB layouts in consumer electronics, IoT devices, and automotive applications.
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