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DS2431Q+TR Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS2431Q+TR Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 25 page 1024-Bit, 1-Wire EEPROM ________________________________________________________________ Maxim Integrated Products 1 Rev 6; 8/08 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. General Description The DS2431 is a 1024-bit, 1-Wire® EEPROM chip orga- nized as four memory pages of 256 bits each. Data is written to an 8-byte scratchpad, verified, and then copied to the EEPROM memory. As a special feature, the four memory pages can individually be write protected or put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. The DS2431 communi- cates over the single-conductor 1-Wire bus. The commu- nication follows the standard 1-Wire protocol. Each device has its own unalterable and unique 64-bit ROM registration number that is factory lasered into the chip. The registration number is used to address the device in a multidrop, 1-Wire net environment. Applications Accessory/PCB Identification Medical Sensor Calibration Data Storage Analog Sensor Calibration Including IEEE P1451.4 Smart Sensors Ink and Toner Print Cartridge Identification After-Market Management of Consumables Features ♦ 1024 Bits of EEPROM Memory Partitioned Into Four Pages of 256 Bits ♦ Individual Memory Pages Can Be Permanently Write Protected or Put in EPROM-Emulation Mode (“Write to 0”) ♦ Switchpoint Hysteresis and Filtering to Optimize Performance in the Presence of Noise ♦ IEC 1000-4-2 Level 4 ESD Protection (8kV Contact, 15kV Air, Typical) ♦ Reads and Writes Over a Wide Voltage Range from 2.8V to 5.25V from -40°C to +85°C ♦ Communicates to Host with a Single Digital Signal at 15.4kbps or 125kbps Using 1-Wire Protocol ♦ Also Available as Automotive Version Meeting AEC-Q100 Grade 1 Qualification Requirements (DS2431-A1) Ordering Information IO RPUP VCC μC GND DS2431 Typical Operating Circuit Note: The leads of TO-92 packages on tape and reel are formed to approximately 100-mil (2.54mm) spacing. For details, refer to the package outline drawing. + Denotes a lead-free/RoHS-compliant package. T&R = Tape and reel. * EP = Exposed pad. ** Contact factory for availability and guidelines on qualified usage conditions of the lead-free UCSPR. PART TEMP RANGE PIN-PACKAGE DS2431+ -40°C to +85°C 3 TO-92 DS2431+T&R -40°C to +85°C 3 TO-92 DS2431P+ -40°C to +85°C 6 TSOC DS2431P+T&R -40°C to +85°C 6 TSOC DS2431G+ -40°C to +85°C 2 SFN DS2431G+T&R -40°C to +85°C 2 SFN DS2431Q+T&R -40°C to +85°C 6 TDFN-EP* (2.5k pcs) DS2431X+S -40°C to +85°C 3x3 UCSPR** (2.5k pcs) DS2431X+ -40°C to +85°C 3x3 UCSPR** (10k pcs) 1-Wire is a registered trademark of Maxim Integrated Products, Inc. Pin Configurations appear at end of data sheet. |
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