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1-Wire Serial Memory Products

Add Memory to a product with a single electrical connection!

1-Wire® serial memory products provide EEPROM and EPROM memory arrays that are both powered and operated over the single contact 1-Wire interface.  The 1-Wire interface provides advantages over other industry interfaces such as I2C™ or SPI™ in applications where contacts between the host controller and memory device is limited or must be minimized and/or where factory programmed unique device serialization is required or valuable.  1-Wire devices require a total of two contacts for total device operation compared to four contacts for I2C memory or five contacts for SPI memory.

With unique 64-bit device serial numbers and network capable command protocol, 1-Wire memory devices can be multi-dropped on a common 1-Wire line and operated independently.  1-Wire memory security features vary from SW programmable write protection to low cost, cryptographically secure, bi-directional, authentication which is implemented with the industry standard secure hash algorithm (SHA-1).  The single contact, with ground return, 1-Wire interface can be easily implemented from a spare controller port pin making the implementation cost minimal.

 
1-Wire_Memory

1-Wire Memory Devices

Part 64-bit ROM Memory Type Memory Size Security SMT Packages
DS2401
check mark n/a n/a   6-TSOC, CSP
DS2411 check mark n/a n/a   6-TSOC, SOT-23, FlipChip
DS2430A check mark EEPROM 256-bits E2 +
64-bit App Register
WP (App Reg only) 6-TSOC, FlipChip
DS2431 check mark EEPROM 1kb WP 6-TSOC, CSP
DS2432 check mark EEPROM 1kb SHA-1 6-TSOC, FlipChip
DS2433 check mark EEPROM 4kb   SO8, FlipChip
DS2502, DS2505, DS2506 check mark EPROM 1k, 16k, 64kb WP 6-TSOC, SOT-23, CSP

Table Legend:
WP:  software selectable write-protection
SHA-1:  Secure Hash Algorithm (www.itl.nist.gov/fipspubs/fip180-1.htm), ISO/IEC 10118-3
 
Notices:
SPI is a trademark of Motorola Inc. 
I2C is a trademark of Philips Corp. Purchase of I2C components of Maxim Integrated Products, Inc., or one of its Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.



         


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