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MAXIM New Products - DS2484 & MAX14783E
2013-08-05
DS2484

Single-Channel 1-Wire Master with Adjustable Timing and Sleep Mode

Best-in-Class Integrated 1-Wire Line Driver Facilitates Protocol Conversion Between I2C Host and 1-Wire Slave Network

Description

The DS2484 is an I2C-to-1-Wire® bridge device that interfaces directly to standard (100kHz max) or fast (400kHz max) I2C masters to perform protocol conversion between the I2C master and any downstream 1-Wire slave devices. Relative to any attached 1-Wire slave device, the DS2484 is a 1-Wire master. 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. In addition, the 1-Wire bus can be powered down under software control. The dual-voltage operation allows different operating voltages on the I2C and 1-Wire side. Strong pullup features support 1-Wire power delivery to 1-Wire devices such as EEPROMs and sensors. When not in use, the DS2484 can be put in sleep mode where power consumption is minimal.

Key Features

  • I2C Host Interface Supports 100kHz and 400kHz I2C Communication Speeds
  • Standard and Overdrive 1-Wire Communication Speeds
  • Adjustable 1-Wire Timing for tRSTL, tMSP, tW0L, and tREC0
  • 1-Wire Port Can Be Powered Down Under Software Control
  • Supports Power-Saving Sleep Mode (SLPZ Pin), Where the 1-Wire Port is in High Impedance
  • I2C Operating Voltages: 1.8V ±5%, 3.3V ±10%, and 5.0V +5/-10%
  • Built-In Level Translator: 1-Wire Operating Voltage from 3.3V -10% to 5.0V +5%, Independent of I2C Voltage
  • Built-In ESD Protection Level of ±8kV Human Body Model (HBM) Contact Discharge on IO Pin
  • -40°C to +85°C Operating Temperature Range
  • 8-Pin TDFN and 6-Pin SOT23 Packages

MAX14783E

High-Speed 3.3V/5V RS-485/RS-422 Transceiver with ±35kV HBM ESD Protection

Industry's Fastest Dual-Voltage RS-485/RS-422 Transceiver with Highest ESD Protection

Description

The MAX14783E is a 3.3V/5V ESD-protected transceiver intended for half-duplex RS-485/RS-422 communication up to 42Mbps. The device is optimized for high speeds over extended cable runs while maximizing tolerance to noise.
The MAX14783E integrated protection features include short-circuit-protected outputs, hot-swap functionality, and a true fail-safe receiver, guaranteeing a logic-high receiver output when inputs are shorted or open. Hotswap capability eliminates undesired transitions on the bus during power-up or hot insertion.
The transceiver draws 1.9mA (typ) supply current when unloaded or when fully loaded with the drivers disabled and draws less than 10µA (max) of supply current in low-power shutdown mode.
The MAX14783E is available in 8-pin µMAX, 8-pin SO, and small, 8-pin (3mm x 3mm) TDFN-EP packages. The device in the TDFN-EP package operates over the -40°C to +125°C temperature range. The MAX14783E in the µMAX and SO packages operates over the -40°C to +85°C and -40°C to +125°C temperature ranges.

Key Features

  • Integrated Protection Increases Robustness
    • High ESD Protection
      • ±35kV HBM ESD
      • ±20kV Air Gap IEC 61000-4-2 ESD
      • ±12kV IEC 61000-4-2 Contact ESD
    • Short-Circuit Protected Outputs
    • True Fail-Safe Receiver
    • Hot-Swap Capability
  • 3V to 5.5V Supply Voltage Range
  • High-Speed Data Rates up to 42Mbps
  • -40°C to +125°C Operating Temperature
  • Allows Up to 32 Transceivers on the Bus
  • Low 10µA (max) Shutdown Current
  • Saves Board Space
    • Available in 8-pin µMAX, SO, and TDFN-EP Packages

 

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