Advanced 1-Wire Master with Memory

The DS2485 is a 1-Wire® master that performs protocol conversion between the I2C master and any attached 1-Wire slaves. For 1-Wire line driving, internal user-adjustable timers relieve the system host processor from generating time-critical 1-Wire waveforms, supporting both standard and overdrive 1-Wire communication speeds. The 1-Wire master has selectable active or passive 1-Wire pullup. Strong pullup features support 1-Wire power delivery for 1-Wire devices that require this for EEPROMs and cryptographic computations.

Applications

* Industrial Sensors and Tools * Limited-Use Consumables * Medical Instruments * Printer Cartridge Identification

* I2C Communication, up to 1MHz

* 1-Wire Standard and Overdrive Timing Communication Speeds

* 1-Wire Command Scripting Capability

* Adjustable 1-Wire Timing for tRSTL, tMSI, tMSP, tRSTH, tW0L, tW1L, tMSR, tREC, RPUP, and PDSLEW

* 0.75Kb of EEPROM for User Data

* One Open-Drain GPIO Pin

* Large 1-Wire Block Buffer (126 Bytes) for Efficient Data Transfer

* Operating Range: 2.97V to 3.63V, -40°C to +85°C

* ±8kV HBM ESD Protection of 1-Wire IO Pin

* 3mm x 3mm, 6-Pin TDFN-EP Package