93LC66C-I/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock
93LC66C-I/P is a 4 Kbit serial EEPROM from Microchip with 2 MHz clock, 1,000,000 write/erase endurance cycles, and minimum 200-year data retention. Available in a through-hole 8-pin PDIP package for easy prototyping and repair. In stock with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 93LC66C-I/P 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
- 1,000,000 write/erase cycle endurance for high-reliability non-volatile storage in demanding embedded applications
- 2 MHz maximum clock frequency SPI/Microwire serial interface enables fast data access from microcontrollers
- Minimum 200-year data retention ensures long-term storage integrity for configuration and calibration data
Applications
The 93LC66C-I/P is used to store non-volatile configuration, calibration, and serial number data in embedded systems such as industrial controllers, consumer electronics, and automotive accessories. Its 1,000,000 write/erase cycle endurance makes it reliable in applications where stored parameters are updated frequently, such as energy meters or programmable instruments. The through-hole PDIP-8 package is particularly convenient for prototyping, field replacement, and low-volume production applications.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | PDIP-8 |
| Factory Lead Time | 14Weeks |
| YTEOL | 8 |
| Alternate Memory Width | 8 |
| 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 | TS 16949 |
| Serial Bus Type | MICROWIRE |
| Standby Current-Max | 0.0001A |
| Supply Current-Max | 0.003mA |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.5V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Write Cycle Time-Max (tWC) | 10ms |
| Write Protection | 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 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many write/erase cycles does the 93LC66C-I/P support, and how does that affect its lifespan in data-logging designs?
The 93LC66C-I/P is rated for 1,000,000 write/erase cycles per memory cell. At a write rate of once per second, that provides over 11 days of continuous writes; at once per minute, it exceeds 1.9 years of operation before endurance limits are reached. For typical configuration storage updated a few times per day, this endurance easily exceeds a 20-year product lifetime.
What is the maximum clock frequency of the 93LC66C-I/P and which microcontroller SPI modes does it support?
The 93LC66C-I/P supports a maximum clock frequency of 2 MHz on its Microwire-compatible serial interface. It is compatible with SPI modes used by most PIC, AVR, and ARM Cortex-M microcontrollers, requiring only 3 to 4 signal lines (CS, CLK, DI, DO), which simplifies firmware integration and minimizes GPIO usage on the host controller.
What data retention does the 93LC66C-I/P guarantee, and why is this important for calibration storage?
The 93LC66C-I/P guarantees a minimum data retention time of 200 years according to its specification. This extremely long retention period makes it suitable for storing factory calibration coefficients or device serial numbers that must remain intact over the full product lifetime without any power supply or active refresh, which is critical for instruments, sensors, and medical devices.
When is the through-hole 93LC66C-I/P preferable over its surface-mount equivalent in production?
The 93LC66C-I/P in PDIP-8 is preferred when field serviceability or manual soldering is required, such as in industrial control panels, test fixtures, or prototyping boards. The 8-pin through-hole package allows easy socket mounting for IC replacement without reflow equipment, which is valuable in low-volume or repair-oriented production environments where SMD rework tooling is unavailable or impractical.
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