93LC66A-I/MS Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip 93LC66A-I/MS is a 4Kbit (512 x 8) 3-wire serial EEPROM with 2 MHz SPI-compatible interface and 1,000,000 write/erase cycle endurance. Operates across 2.5V to 5.5V supply range with 200-year data retention in an 8-pin MSOP package. Available from stock worldwide.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- 93LC66A-I/MS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3216(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4Kbit serial EEPROM with 512 x 8 organization, 2 MHz 3-wire SPI interface, and 16-byte page write capability for fast sequential data updates
- Endurance of 1,000,000 write/erase cycles with 200-year minimum data retention, ensuring reliable long-life operation in high-write-frequency applications
- Compact 8-pin MSOP package operating from 2.5V to 5.5V, ideal for space-constrained embedded boards requiring non-volatile configuration storage
Applications
The 93LC66A-I/MS is used in embedded systems for storing calibration constants, device configuration, serial number, and trim data in applications such as consumer electronics, industrial sensors, and automotive modules. Its 3-wire SPI interface and compact MSOP-8 footprint make it easy to integrate alongside microcontrollers and DSPs where board space is limited. The high endurance rating of 1,000,000 cycles also makes it suitable for metering equipment and smart card readers where configuration data is updated frequently.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | MSOP-8 |
| Factory Lead Time | 23Weeks |
| YTEOL | 8 |
| Clock Frequency-Max (fCLK) | 2MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | S-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,.19 |
| Package Shape | SQUARE |
| 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 | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum SPI clock frequency supported by the 93LC66A-I/MS?
The 93LC66A-I/MS supports a maximum SPI clock frequency of 2 MHz on its 3-wire serial interface, enabling fast data transfers between the EEPROM and a host microcontroller in embedded systems requiring quick read and write operations.
How many write cycles can the 93LC66A-I/MS handle before data retention may degrade?
The 93LC66A-I/MS is rated for 1,000,000 write/erase cycles minimum, with a data retention of at least 200 years after the last write. This endurance level supports frequent configuration updates in industrial and consumer applications without reliability concerns.
For a compact IoT sensor node, how small is the 93LC66A-I/MS package and what supply voltage does it require?
The 93LC66A-I/MS comes in an 8-pin MSOP package, one of the smallest surface-mount outlines available for serial EEPROM, and operates from a 2.5V to 5.5V supply. This combination makes it a natural fit for battery-powered IoT sensor nodes needing non-volatile parameter storage.
How does the 512 x 8 organization of the 93LC66A-I/MS compare to the 256 x 16 variant for firmware flexibility?
The 93LC66A-I/MS uses 512 x 8 byte-wide organization, while the 93LC66B variant offers 256 x 16 word-wide access. For 8-bit microcontrollers, the 512 x 8 organization simplifies addressing and avoids masking overhead, while 16-bit processors may prefer the 256 x 16 arrangement for efficient word-aligned data storage.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.4100 | $0.41 |
| 25+ | $0.3800 | $9.50 |
| 100+ | $0.3700 | $37.00 |
| 1000+ | $0.3500 | $350.00 |
| 4000+ | $0.3233 | $1293.20 |
| 8000+ | $0.3216 | $2573.12 |
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