93LC66B/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
The 93LC66B/P is a Microchip 4096-bit (4 Kbit) Microwire-compatible serial EEPROM in an 8-pin DIP package, offering 2 MHz clock operation, 200-year data retention, and 1,000,000 write/erase cycle endurance. Available in stock with worldwide shipping for low-cost nonvolatile storage in embedded systems.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 93LC66B/P Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2626(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 93LC66B/P?
- 4096-bit Microwire-compatible serial EEPROM provides simple 3-wire SPI-like interface for microcontroller storage expansion
- 1,000,000 write/erase cycle endurance ensures long service life in frequently updated configuration or calibration data applications
- 2 MHz maximum clock frequency supports fast serial data transfers while remaining compatible with low-speed microcontrollers
- 200-year minimum data retention and RoHS-compliant 8-pin PDIP package enable reliable through-hole prototyping and production
What is 93LC66B/P used for?
The 93LC66B/P is used in consumer electronics, industrial controllers, and appliances for storing configuration parameters, calibration coefficients, and device identifiers that must survive power cycles. Its Microwire-compatible 3-wire interface connects directly to microcontroller SPI or bit-banged GPIO pins with minimal hardware. The 8-pin DIP package makes it particularly convenient for prototyping and cost-sensitive designs where through-hole assembly is preferred.
What are the specifications of 93LC66B/P?
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-8 |
| Factory Lead Time | 8Weeks |
| YTEOL | 5.4 |
| Clock Frequency-Max (fCLK) | 2MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e3 |
| Memory Density | 4096bit |
| Memory IC Type | EEPROM |
| Memory Width | 16 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 256words |
| Number of Words Code | 256 |
| Operating Mode | SYNCHRONOUS |
| Organization | 256X16 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Parallel/Serial | SERIAL |
| Programming Voltage | 3V |
| Qualification Status | Not Qualified |
| Screening Level | AEC-Q100 |
| Serial Bus Type | MICROWIRE |
| Standby Current-Max | 0.000001A |
| Supply Current-Max | 0.0015mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | MATTE TIN |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 6ms |
| Write Protection | HARDWARE/SOFTWARE |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Thailand |
Where can I find the 93LC66B/P datasheet?
93LC66B/P Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for 93LC66B/P?
Compatible alternatives and drop-in replacements for 93LC66B/P:
Frequently Asked Questions
How many write/erase cycles can 93LC66B/P endure, and what does that mean for a product storing configuration data daily?
The 93LC66B/P is rated for 1,000,000 write/erase cycles minimum, which means a device updating one configuration byte every day would take over 2,700 years to exhaust the endurance limit. This ample cycle budget makes it reliable for datalogging, meter calibration storage, or user preference retention in industrial and consumer applications with frequent but moderate write activity.
What serial interface protocol does 93LC66B/P use, and how does it connect to a microcontroller?
The 93LC66B/P uses a Microwire-compatible 3-wire serial interface consisting of chip select (CS), serial clock (SK up to 2 MHz), and bidirectional data (DI/DO) signals. Most microcontrollers can drive it directly from hardware SPI peripherals or software bit-banging routines with as few as 3 GPIO pins, making it one of the simplest nonvolatile storage solutions to integrate.
How long does 93LC66B/P retain data without power, and what makes it suitable for long-life equipment?
The 93LC66B/P guarantees a minimum data retention time of 200 years at standard operating conditions, far exceeding typical product service lifetimes of 10 to 20 years. This long retention is achieved through Microchip's EEPROM cell technology and ensures stored parameters, serial numbers, or calibration values remain intact even through extended storage or infrequent use scenarios.
For a low-volume prototype needing 4 Kbit of serial EEPROM, why is the 93LC66B/P in PDIP-8 a practical choice?
The 8-pin PDIP through-hole package allows hand-soldering and direct insertion into a breadboard or DIP socket without SMD rework equipment, accelerating prototyping. At 4096 bits of storage accessible at up to 2 MHz over a 3-wire Microwire interface, 93LC66B/P offers sufficient capacity for storing 512 bytes of configuration data, calibration tables, or MAC addresses typical of early-stage embedded development.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.4500 | $0.45 |
| 9+ | $0.4161 | $3.74 |
| 23+ | $0.2626 | $6.04 |
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