1 Features
• 20480 Bits of FRAM for storage of userprogrammable configuration data partitioned into multiple pages
• Single-wire interface (1-wire® compatible) to reduce circuit board routing
• Communicates using single-wire protocol (compatible with 1-wire® protocol): 15.4Kbps (standard Speed) and 90Kbps (Overdrive Speed)
• Switch-point hysteresis and filtering embedded in the device to improve performance in the presence of noise
• IEC 61000-4-2 level 4 ESD protection (±8kV contact, ±15kV air, typical)
• Factory-programmed unique 64-bit identification number
• Operating temperature range: -10°C to 85°C
• Operating voltage range: 5V ±5% (Standard and
Overdrive Speed), 3.3V ±5% (Standard Speed only)
• Available in TO-92 (LP) and VSON (DRP) packages

2 Applications
• Medical Cable Identification
• Asset trackers
• Connected peripherals & printers
• Counterfeit hardware prevention

3 Description
The TMF0020 is a 20K bit serial non-volatile memory (NVM) device containing a unique factoryprogrammed 48-bit identification number and an 8-bit family code. The memory is FRAM-based and has high endurance (106 R/W cycles) compared to other NVM technologies.
The device communicates over an SDQ™ singlewire interface compatible with 1-wire® protocol and supports both 15.4Kbps and 90Kbps speeds. The SDQ single-wire serial interface pin acts as both the communication pin and power pin for the device. The memory is organized as 80 memory pages with 256 bits per page. Data is first written to a 32-byte scratchpad. Then the data is verified before copying to FRAM memory.
The device operates at two supply voltage ranges, 3.3V ±5% and 5V ±5%, and is specified from -10°C to 85°C. The operating range covers most applications and enables peak design for low-cost development.
1-Wire® is a registered trademark of Maxim Integrated Products, Inc.