93LC66AT-I/OT Microchip Integrated Circuit (SOT23 (6-Pin)) In Stock

Name: 93LC66AT-I/OT
Brand: Microchip
SKU: 93LC66AT-I/OT
Availability: InStock

Microchip 93LC66AT-I/OT is a 4Kbit (512×8) serial EEPROM in a compact SOT-23-6 package, operating up to 3 MHz SPI clock, rated for 1 million write/erase cycles with 200-year data retention. Available from stock worldwide.

ACTIVEIntegrated CircuitVerified Jul 2026

Package / Visual Reference

93LC66AT-I/OTSOT23 (6-Pin)

Quick Facts

Manufacturer: Microchip
Package: SOT23 (6-Pin)
Pin Count: 6
Lifecycle: ACTIVE
Datasheet: 93LC66AT-I/OT Datasheet PDF
Category: Integrated Circuit
Price: From $0.2627(MOQ 1)
Temp Range: -40.0°C to 85.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of 93LC66AT-I/OT?

4Kbit (512×8) serial EEPROM with 3 MHz SPI-compatible clock interface
1,000,000 write/erase cycle endurance with 200-year data retention
Ultra-compact SOT-23-6 package ideal for space-constrained designs
RoHS-compliant (Pb-free) with industrial temperature range support

What is 93LC66AT-I/OT used for?

The 93LC66AT-I/OT is well suited for storing configuration data and calibration parameters in consumer electronics, industrial sensors, and appliances. Its compact SOT-23-6 footprint makes it ideal for portable and wearable devices where board space is critical. The device also serves automotive accessory modules and medical instrument calibration storage where reliable non-volatile memory is required.

What are the specifications of 93LC66AT-I/OT?

Pbfree Code	Yes
Manufacturer Package Code	SOT-23-6
Factory Lead Time	14Weeks
YTEOL	8
Clock Frequency-Max (fCLK)	3MHz
Data Retention Time-Min	200
Endurance	1000000 Write/Erase Cycles
JESD-30 Code	R-PDSO-G6
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	TSOP5/6,.11,37
Package Shape	RECTANGULAR
Package Style	SMALL OUTLINE, LOW 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	0.95mm
Terminal Position	DUAL
Time@Peak Reflow Temperature-Max (s)	40
Toggle Bit	YES
Write Cycle Time-Max (tWC)	6ms
Write Protection	SOFTWARE
Package	SOT23 (6-Pin)

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

Where can I find the 93LC66AT-I/OT datasheet?

93LC66AT-I/OT Datasheet Download

Official datasheet from Microchip

What are equivalent replacements for 93LC66AT-I/OT?

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 93LC66AT-I/OT?

The 93LC66AT-I/OT supports a maximum SPI-compatible clock frequency of 3 MHz, making it suitable for microcontroller systems that communicate over standard serial buses at typical embedded clock rates.

How many write/erase cycles can the 93LC66AT-I/OT endure before reliability degrades?

The device is rated for up to 1,000,000 write/erase cycles, providing exceptional longevity for applications that frequently update configuration registers, calibration offsets, or usage counters in industrial and consumer equipment.

Which embedded control designs can use the 93LC66AT-I/OT given its 4Kbit capacity and SOT-23-6 footprint?

At 4Kbit (512 bytes) organized as 512×8, the device is ideal for storing firmware version IDs, sensor calibration tables, and small configuration records in 8-bit or 32-bit microcontroller designs where board area is limited to the SOT-23-6 outline.

When is the 93LC66AT-I/OT a practical choice over a larger EEPROM in a PCB design?

When the application requires fewer than 512 bytes of non-volatile storage at 3 MHz SPI, the 93LC66AT-I/OT's SOT-23-6 package saves significant PCB area compared to 8-SOIC alternatives, reducing cost and simplifying layout in handheld or wearable products.

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AvailabilityIn Stock

Reference Price (USD)

From $0.2627

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1+	$0.2627	$0.26

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Unit price: $0.2627 · Total: $0.26

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Lead Time3-7 business days

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OriginChina (Authorized)

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93LC66AT-I/OT Microchip Integrated Circuit (SOT23 (6-Pin)) In Stock

What are the key features of 93LC66AT-I/OT?

What is 93LC66AT-I/OT used for?

What are the specifications of 93LC66AT-I/OT?

Compliance & Regulatory

Where can I find the 93LC66AT-I/OT datasheet?

What are equivalent replacements for 93LC66AT-I/OT?

Frequently Asked Questions

What is the maximum SPI clock frequency supported by the 93LC66AT-I/OT?

How many write/erase cycles can the 93LC66AT-I/OT endure before reliability degrades?

Which embedded control designs can use the 93LC66AT-I/OT given its 4Kbit capacity and SOT-23-6 footprint?

When is the 93LC66AT-I/OT a practical choice over a larger EEPROM in a PCB design?

Related Guides

CSD87313DMS Synchronous Buck Power Stage Design Guide

STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection

C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC

STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security

Why Buy from FindMyChip

About Microchip

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