DS2485Q+U

DS2485Q+U is an advanced 1-wire interface IC with memory. It performs protocol conversion between the I²C host and any attached 1-wireserver. 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 interface has selectable active or passive 1-wire pullup. Strong pull-up features support 1-wire power delivery for 1-wire devices that require this for EEPROMs and cryptographic computations. It is used in applications such as medical instruments, industrial sensors and tools, limited-use consumables, printer cartridge identification.

• I²C communication up to 1MHz, 0.75Kb of EEPROM for user data
• 1-wire standard and overdrive timing communication speeds
• 1-wire command scripting capability, one open-drain GPIO pin
• Adjustable 1-wire timing for tRSTL, tMSI, tMSP, tRSTH, tW0L, tW1L, tMSR, tREC, RPUP, and PDSLEW
• Large 1-wire block buffer (126 bytes) for efficient data transfer
• Operating voltage range from 2.97V to 3.63V
• Supply current is 400μA maximum at (TA = +25°C)
• Switching hysteresis is 0.3V typical at (TA = +25°C)
• Operating temperature range from -40°C to +85°C
• 6-pin TDFN package

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