93LC66B-I/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock

Name: 93LC66B-I/P
Brand: Microchip
SKU: 93LC66B-I/P
Availability: InStock

Microchip 93LC66B-I/P is a 4Kbit serial EEPROM with SPI-compatible interface, operating from 2.5V to 5.5V. It offers 1 million erase/write cycles and over 200 years data retention in an 8-pin PDIP package for non-volatile storage applications.

ACTIVEIntegrated CircuitVerified Jun 2026

Package / Visual Reference

93LC66B-I/PDual-In-Line Packages

Quick Facts

Manufacturer: Microchip
Package: Dual-In-Line Packages
Pin Count: 8
Lifecycle: ACTIVE
Datasheet: 93LC66B-I/P Datasheet PDF
Category: Integrated Circuit
Price: From $0.2800(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 93LC66B-I/P?

4Kbit SPI-compatible EEPROM with 1 MHz clock speed, enabling fast non-volatile data storage in space-constrained designs
Exceptional endurance of 1,000,000 erase/write cycles and data retention exceeding 200 years for long-life embedded systems
Wide supply voltage range of 2.5V to 5.5V enabling compatibility with both 3.3V and 5V microcontroller systems without level translation

What is 93LC66B-I/P used for?

The 93LC66B-I/P is ideal for storing calibration data, configuration parameters, and user settings in industrial sensors, smart meters, and consumer electronics requiring reliable non-volatile memory. Its wide 2.5V to 5.5V operating range and 8-pin PDIP form factor make it a straightforward drop-in solution for both legacy 5V systems and modern 3.3V microcontroller platforms.

What are the specifications of 93LC66B-I/P?

Pbfree Code	Yes
Manufacturer Package Code	PDIP-8
Factory Lead Time	14Weeks
YTEOL	8
Additional Feature	1000000 ERASE/WRITE CYCLES MIN; DATA RETENTION > 200 YEARS
Clock Frequency-Max (fCLK)	1MHz
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
Output Characteristics	TOTEM POLE
Package Body Material	PLASTIC/EPOXY
Package Equivalence Code	DIP8,.3
Package Shape	RECTANGULAR
Package Style	IN-LINE
Parallel/Serial	SERIAL
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)	1.8V
Supply Voltage-Nom (Vsup)	2.5V
Surface Mount	NO
Technology	CMOS
Temperature Grade	INDUSTRIAL
Terminal Finish	Matte Tin (Sn)
Terminal Form	THROUGH-HOLE
Terminal Pitch	2.54mm
Terminal Position	DUAL
Toggle Bit	YES
Write Cycle Time-Max (tWC)	6ms
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

Where can I find the 93LC66B-I/P datasheet?

93LC66B-I/P Datasheet Download

Official datasheet from Microchip

What are equivalent replacements for 93LC66B-I/P?

Compatible alternatives and drop-in replacements for 93LC66B-I/P:

93LC66B/PMicrochip Technology Inc

4K, 256 X 16 SERIAL EE

View Part →

Compare all alternatives & request quotes →

Frequently Asked Questions

How many erase/write cycles and how long does the 93LC66B-I/P retain data without power?

The 93LC66B-I/P is rated for a minimum of 1,000,000 erase/write cycles and guarantees data retention exceeding 200 years, making it suitable for high-endurance logging and configuration storage applications.

What serial interface and maximum clock frequency does the 93LC66B-I/P use?

The device uses a 3-wire SPI-compatible serial interface and supports clock frequencies up to 1 MHz, allowing straightforward integration with virtually any microcontroller's SPI or bit-banged GPIO peripheral.

Can the 93LC66B-I/P operate in both 3.3V and 5V microcontroller systems?

Yes, the 93LC66B-I/P operates from 2.5V to 5.5V, covering both 3.3V and 5V supply rails without requiring any level-shifting circuitry, which simplifies board design and reduces component count.

How much data capacity does the 4Kbit 93LC66B-I/P provide, and how is it organized?

The 93LC66B-I/P provides 4Kbit (512 bytes) of EEPROM organized as 256 x 16-bit words or 512 x 8-bit bytes depending on the ORG pin state, offering flexible data width for different microcontroller architectures.

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AvailabilityIn Stock

Reference Price (USD)

From $0.2800

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
1+	$0.4500	$0.45
25+	$0.4300	$10.75
100+	$0.4200	$42.00
240+	$0.3205	$76.92
300+	$0.2850	$85.50
1000+	$0.2800	$280.00

pcs

Unit price: $0.4500 · Total: $0.45

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Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

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93LC66B-I/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock

What are the key features of 93LC66B-I/P?

What is 93LC66B-I/P used for?

What are the specifications of 93LC66B-I/P?

Compliance & Regulatory

Where can I find the 93LC66B-I/P datasheet?

What are equivalent replacements for 93LC66B-I/P?

Frequently Asked Questions

How many erase/write cycles and how long does the 93LC66B-I/P retain data without power?

What serial interface and maximum clock frequency does the 93LC66B-I/P use?

Can the 93LC66B-I/P operate in both 3.3V and 5V microcontroller systems?

How much data capacity does the 4Kbit 93LC66B-I/P provide, and how is it organized?

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

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