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A Tale of Two Pins


Using as few as two pins, our single-wire and UNI/O® bus serial EEPROMs can add the functionality your attachable end products have been missing. From authentication to calibration, these chips are ideal for replaceable attachments and consumable goods. They can also provide usage data to give insight on your products health, lifetime, and usage statistics. With as few as two pins (Serial I/O and GND) these products provide the verification, tracking, usage record, and counterfeit protection needed for your devices.

No Solder? No Problem


The single-wire devices can be mechanically attached (snap-in) to your end products. This means simplified manufacturing and greater flexibility with low-thermal plastic enclosures. They also offer extremely strong ESD protection making them suitable for direct contact from outside of the application.

Example Applications


  • Authentication: Medical disposables, cable and fiber optic connectors, batteries, printer cartridges, e-cigarettes, industrial and consumer attachments
  • Calibration: Fitness and healthcare wearables, medical strips and pumps, sensors
  • Data logging and usage records: Alarm systems, home appliances, consumer electronics, medical products
  • Identification: Asset tracking and serial numbers
  • Additional memory: Pin-limited microcontrollers that require additional memory

Documentation


Title Download
AT21CS01/AT21CS11 Data Sheet Download
11AAXXX/11LCXXX Data Sheet Download

Single-Wire and UNI/O® Bus Serial EEPROMs

View All Parametrics
Product Status 5K Pricing E/W Cycles (M) Density Write Speed (millisecond) Max. Clock Freq. Operating Voltage Temp. Range Automotive Capable Packages
AT21CS01 In Production $0.16 1 1K bits (x8) 5 125 kbps 1.7 - 3.6 -40°C to +85°C No 4/WLCSP, 8/UDFN, 8/SOIC, 2/XSFN, 3/SOT-23
AT21CS11 In Production $0.16 1 1K bits (x8) 5 125 kbps 2.7 - 4.5 -40°C to +85°C No 8/SOIC, 2/XSFN, 3/SOT-23
View All Parametrics
Product Status Description 5K Pricing Automotive Recommended E/W Cycles (M) High Endurance Block Density Page Size
(Bytes)
Write Speed
(millisecond)
Max. Clock
Freq.
Operating Voltage Temp. Range Max. Standby
Current (µA)
Write
Protect
Cascade Pb-Free
Available
Endurance
E/W Cycles
Word
Size
ORG Pin Packages
11AA010 In Production UNI/O Serial EEPROM Family $0.17 Yes 0 0 1K bit (x8) 16 5 100 kHz 1.8 - 5.5 -40°C to +85°C 1 Quarter, Half, Whole Array No Yes 1,000,000 8-bit No 8/MSOP, 8/TDFN, 8/SOIC, 3/SOT-23, 8/PDIP, 3/TO-92
11LC010 In Production UNI/O Serial EEPROM Family $0.16 Yes 0 0 1K bit (x8) 16 5 100 kHz 2.5 - 5.5 -40°C to +125°C 1 Quarter, Half, Whole Array No Yes 1,000,000 8-bit No 8/MSOP, 8/TDFN, 8/SOIC, 3/SOT-23, 8/PDIP, 3/TO-92
View All Parametrics
Product Status Description 5K Pricing Automotive Recommended E/W Cycles (M) High Endurance Block Density Page Size
(Bytes)
Write Speed
(millisecond)
Max. Clock
Freq.
Operating Voltage Temp. Range Max. Standby
Current (µA)
Write
Protect
Cascade Pb-Free
Available
Endurance
E/W Cycles
Word
Size
ORG Pin Packages
11AA02E48 In Production UNI/O Serial EEPROM Family $0.27 No 2K bit (x8) 16 5 100 kHz 1.8 - 5.5 -40°C to +85°C 1 Quarter Array No 1,000,000 8-bit No 8/SOIC, 3/SOT-23
11AA02E64 In Production UNI/O Serial EEPROM Family $0.27 No 2K bit (x8) 16 5 100 kHz 1.8 - 5.5 -40°C to +85°C 1 Quarter Array No 1,000,000 8-bit No 8/SOIC, 3/SOT-23
11AA02UID In Production UNI/O Serial EEPROM Family $0.26 No 0 0 2K bit (x8) 16 5 100 kHz 1.8 - 5.5 -40°C to +85°C 1 Quarter Array No No 1,000,000 8-bit No 8/SOIC, 3/SOT-23
11AA020 In Production UNI/O Serial EEPROM Family $0.19 Yes 0 0 2K bit (x8) 16 5 100 kHz 1.8 - 5.5 -40°C to +85°C 1 Quarter, Half, Whole Array No Yes 1,000,000 8-bit No 4/CSP, 8/MSOP, 8/TDFN, 8/SOIC, 3/SOT-23, 8/PDIP, 3/TO-92
11LC020 In Production UNI/O Serial EEPROM Family $0.17 Yes 0 0 2K bit (x8) 16 5 100 kHz 2.5 - 5.5 -40°C to +125°C 1 Quarter, Half, Whole Array No Yes 1,000,000 8-bit No 8/MSOP, 8/TDFN, 8/SOIC, 3/SOT-23, 8/PDIP, 3/TO-92
View All Parametrics
Product Status Description 5K Pricing Automotive Recommended E/W Cycles (M) High Endurance Block Density Page Size
(Bytes)
Write Speed
(millisecond)
Max. Clock
Freq.
Operating Voltage Temp. Range Max. Standby
Current (µA)
Write
Protect
Cascade Pb-Free
Available
Endurance
E/W Cycles
Word
Size
ORG Pin Packages
11AA040 In Production UNI/O Serial EEPROM Family $0.18 Yes 0 0 4K bit (x8) 16 5 100 kHz 1.8 - 5.5 -40°C to +85°C 1 Quarter, Half, Whole Array No Yes 1,000,000 8-bit No 8/MSOP, 8/TDFN, 8/SOIC, 3/SOT-23, 8/PDIP
11LC040 In Production UNI/O Serial EEPROM Family $0.20 Yes 0 0 4K bit (x8) 16 5 100 kHz 2.5 - 5.5 -40°C to +125°C 1 Quarter, Half, Whole Array No Yes 1,000,000 8-bit No 8/MSOP, 8/TDFN, 8/SOIC, 3/SOT-23, 8/PDIP, 3/TO-92
View All Parametrics
Product Status Description 5K Pricing Automotive Recommended E/W Cycles (M) High Endurance Block Density Page Size
(Bytes)
Write Speed
(millisecond)
Max. Clock
Freq.
Operating Voltage Temp. Range Max. Standby
Current (µA)
Write
Protect
Cascade Pb-Free
Available
Endurance
E/W Cycles
Word
Size
ORG Pin Packages
11AA080 In Production UNI/O Serial EEPROM Family $0.21 Yes 0 0 8K bit (x8) 16 5 100 kHz 1.8 - 5.5 -40°C to +85°C 1 Quarter, Half, Whole Array No Yes 1,000,000 8-bit No 3/SOT-23, 3/TO-92, 8/MSOP, 8/PDIP, 8/SOIC, 8/TDFN
11LC080 In Production UNI/O Serial EEPROM Family $0.20 Yes 0 0 8K bit (x8) 16 5 100 kHz 2.5 - 5.5 -40°C to +125°C 1 Quarter, Half, Whole Array No Yes 1,000,000 8-bit No 3/SOT-23, 3/TO-92, 8/MSOP, 8/PDIP, 8/SOIC, 8/TDFN
View All Parametrics
Product Status Description 5K Pricing Automotive Recommended E/W Cycles (M) High Endurance Block Density Page Size
(Bytes)
Write Speed
(millisecond)
Max. Clock
Freq.
Operating Voltage Temp. Range Max. Standby
Current (µA)
Write
Protect
Cascade Pb-Free
Available
Endurance
E/W Cycles
Word
Size
ORG Pin Packages
11AA160 In Production UNI/O Serial EEPROM Family $0.23 Yes 0 0 16K bit (x8) 16 5 100 kHz 1.8 - 5.5 -40°C to +85°C 1 Quarter, Half, Whole Array No Yes 1,000,000 8-bit No 4/CSP, 8/MSOP, 8/TDFN, 8/SOIC, 3/SOT-23, 8/PDIP, 3/TO-92
11AA161 In Production UNI/O Serial EEPROM Family $0.23 Yes 0 0 16K bit (x8) 16 5 100 kHz 1.8 - 5.5 -40°C to +85°C 1 Quarter Array 2 No 1,000,000 8-bit No 8/MSOP, 8/TDFN, 8/SOIC, 3/SOT-23, 8/PDIP, 3/TO-92
11LC160 In Production UNI/O Serial EEPROM Family $0.21 Yes 0 0 16K bit (x8) 16 5 100 kHz 2.5 - 5.5 -40°C to +125°C 1 Quarter, Half, Whole Array No Yes 1,000,000 8-bit No 8/MSOP, 8/TDFN, 8/SOIC, 3/SOT-23, 8/PDIP, 3/TO-92
11LC161 In Production UNI/O Serial EEPROM Family $0.23 Yes 0 0 16K bit (x8) 16 5 100 kHz 2.5 - 5.5 -40°C to +125°C 1 Quarter Array 2 No 1,000,000 8-bit No 8/MSOP, 8/DFN, 8/TDFN, 8/SOIC, 3/SOT-23, 8/PDIP, 3/TO-92

Development Tools


Serial Memory Single-Wire Evaluation Kit

Part Number: DM160232

The Serial Memory Single-Wire Evaluation Kit (DM160232) is an easy-to-use interactive user tool to demonstrate the best in class features, functionality and low-power operation of the AT21CS Series Serial EEPROM devices. The evaluation kit is for engineers, developers and decision makers to allow for fast system prototyping using the Single-Wire Interface (SWI) protocol. The Serial Memory Single-Wire Evaluation Kit includes a Graphical User Interface (GUI) which allows the user to configure, demonstrate and personalize the single-wire Serial EEPROM device.

Serial EEPROM PIM PICtail Pack

Part Number: AC243003

The Serial EEPROM PIM PICtail™ Modules are a series of boards designed around Microchip Serial EEPROM devices. The boards are designed to interface with the PICtail Plus connector as well as the MPLAB® Starter Kit for Serial Memory Products and the PICkit™ 2, allowing you to get started right out of the box. 

MPLAB Starter Kit for Serial Memory Products

Part Number: DV243003

Designers of Serial EEPROM applications can enjoy the increased productivity, reduced time to market and rock-solid design that only a well thought out development system can provide. Microchip's MPLAB® Starter Kit for Serial Memory Products includes everything necessary to quickly develop a robust and reliable Serial EEPROM design, and greatly reduces the time required for system integration and hardware/software fine-tuning.