93AA66C-I/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock

Name: 93AA66C-I/P
Brand: Microchip
SKU: 93AA66C-I/P
Availability: InStock

93AA66C-I/P is a 4 Kbit Microwire-compatible serial EEPROM organized as 256 x 16 or 512 x 8 bits, with up to 3 MHz clock, 1 million write/erase cycles, and 200-year data retention in an 8-pin DIP package. Ideal for non-volatile parameter storage in embedded systems.

ACTIVEIntegrated CircuitVerified Jun 2026

Package / Visual Reference

93AA66C-I/PDual-In-Line Packages

Quick Facts

Manufacturer: Microchip
Package: Dual-In-Line Packages
Pin Count: 8
Lifecycle: ACTIVE
Datasheet: 93AA66C-I/P Datasheet PDF
Category: Integrated Circuit
Price: From $0.3136(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 93AA66C-I/P?

4 Kbit capacity configurable as 256 x 16-bit or 512 x 8-bit organization
Microwire-compatible serial interface with up to 3 MHz clock frequency
1,000,000 write/erase cycle endurance for high-reliability applications
200-year minimum data retention for long-life deployments
Low-voltage operation from 1.8 V to 5.5 V
8-pin DIP package for easy prototyping and through-hole assembly

What is 93AA66C-I/P used for?

93AA66C-I/P is used for storing calibration constants, configuration parameters, and serial number data in industrial control units, medical devices, and consumer appliances. Its 1 million write cycle endurance makes it suitable for frequently updated data such as usage counters or event logs. The through-hole DIP package simplifies prototyping and is favored in legacy industrial designs requiring manual board assembly.

What are the specifications of 93AA66C-I/P?

Pbfree Code	Yes
Manufacturer Package Code	PDIP-8
Factory Lead Time	23Weeks
YTEOL	8
Additional Feature	ALSO CONFIGURABLE AS 512 X 8
Alternate Memory Width	8
Clock Frequency-Max (fCLK)	3MHz
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 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 93AA66C-I/P datasheet?

93AA66C-I/P Datasheet Download

Official datasheet from Microchip

What are equivalent replacements for 93AA66C-I/P?

No known alternates. Submit an RFQ and our team can suggest alternatives.

Frequently Asked Questions

How is the 4 Kbit memory of 93AA66C-I/P organized and can the width be changed?

The 93AA66C-I/P organizes its 4 Kbit memory as 256 x 16-bit words by default, but it can be reconfigured to 512 x 8-bit bytes using the ORG pin. This flexibility lets designers match the memory width to their microcontroller's preferred data bus width without changing the IC.

What write endurance and data retention does 93AA66C-I/P guarantee for high-reliability storage?

93AA66C-I/P guarantees a minimum endurance of 1,000,000 write/erase cycles per memory location and a data retention of at least 200 years. This makes it reliable for applications that update configuration data frequently, such as industrial calibration records or appliance settings across years of field operation.

At what clock speed does the Microwire interface of 93AA66C-I/P operate and how does that compare to SPI-based EEPROMs?

93AA66C-I/P supports a Microwire serial clock up to 3 MHz, which is sufficient for typical embedded configuration-data reads and writes. SPI-based EEPROMs such as the 25AA series can reach 10 MHz or higher, so for throughput-critical bulk data transfer an SPI EEPROM is faster, but the 3 MHz Microwire interface is ample for storing a few hundred bytes of calibration or configuration data.

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AvailabilityIn Stock

Reference Price (USD)

From $0.3136

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
1+	$0.4800	$0.48
10+	$0.4300	$4.30
25+	$0.3900	$9.75
100+	$0.3626	$36.26
250+	$0.3136	$78.40

pcs

Unit price: $0.4800 · Total: $0.48

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Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

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93AA66C-I/P Microchip Integrated Circuit (Dual-In-Line Packages) In Stock

What are the key features of 93AA66C-I/P?

What is 93AA66C-I/P used for?

What are the specifications of 93AA66C-I/P?

Compliance & Regulatory

Where can I find the 93AA66C-I/P datasheet?

What are equivalent replacements for 93AA66C-I/P?

Frequently Asked Questions

How is the 4 Kbit memory of 93AA66C-I/P organized and can the width be changed?

What write endurance and data retention does 93AA66C-I/P guarantee for high-reliability storage?

At what clock speed does the Microwire interface of 93AA66C-I/P operate and how does that compare to SPI-based EEPROMs?

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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