Datasheet Linear Technology LTC2939IMS#TRPBF — Ficha de datos

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LTC2938

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  4- and 6-Supply Monitors Feature ±1.5% Accuracy and Watchdog Timers for Rails Down to 1.2V &mdash LT Journal
  PDF, 826 Kb, Archivo publicado: oct 27, 2010
  Extracto del documento

  design features 4-and 6-Supply Monitors Feature В±1.5% Accuracy and
  Watchdog Timers for Rails Down to 1.2V
  A. Ng Two new power supply monitors from Linear Technology, the LTC2938 and LTC2939,
  are specifically designed to monitor lower supply voltages (down to 1.2V) in multivoltage
  systems. The LTC2938 and LTC2939 share the same architecture and differ only in
  the number of voltages monitored. The LTC2938 is a 4-supply monitor and comes in
  compact 12-pin MSOP and DFN packages. The LTC2939 monitors six supplies and
  is offered in a 16-pin MSOP package. Both monitors have a tight threshold accuracy
  of 1.5% over the operating temperature range, which eases the voltage headroom
  requirements of circuits powered by the monitored supplies and is much tighter than
  supply monitors from other manufacturers. Neither monitor requires external calibration
  or trimming. Both parts are designed for systems with 5% power supply tolerance.
  The watchdog circuit in these monitors includes a watchdog input (WDI)
  and a watchdog output (WDO), which
  facilitates microprocessor monitoring
  and control. The WDO output is latched
  low in the event of a watchdog timeout
  and allows the microprocessor to distinguish between resets caused by a supply
  undervoltage from those due to software
  malfunction. Both devices feature reset
  and watchdog timers that can be arbitrarily adjusted using external capacitors
  for greater flexibility in system design. SINGLE PIN SELECTS FROM
  16 POSSIBLE THRESHOLD …

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Clasificación del fabricante

• Monitor, Control and Protection > Supervisory Circuits > Quad or More Supply Monitors
• Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) System Monitor

Otros nombres:

LTC2939IMSTRPBF, LTC2939IMS TRPBF