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U6808B - Specia Fail-safe IC

General Description

The U6808B is designed to support the fail-safe function of a safety critical system (e.g., ABS).

It includes a relay driver, a watchdog controlled by an external R/C-network and a reset circuit initiated by an over and undervoltage condition of the 5-V supply providing a low-level reset signal.

Key Features

  • Digital Self-supervising Watchdog with Hysteresis One 250-mA Output Driver for Relay Enable Output Open Collector 8 mA Over/Undervoltage Detection ENABLE and RELAY Outputs Protected Against Standard Transients and 40V Load Dump.
  • ESD Protection According to MIL-STD-883 D Test Method 3015.7.
  • Human Body Model: ±2 kV (100 pF, 1.5 kΩ).
  • Machine Model: ±200 V (200 pF, 0Ω) Special Fail-safe IC U6808B 1.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Features • • • • • Digital Self-supervising Watchdog with Hysteresis One 250-mA Output Driver for Relay Enable Output Open Collector 8 mA Over/Undervoltage Detection ENABLE and RELAY Outputs Protected Against Standard Transients and 40V Load Dump • ESD Protection According to MIL-STD-883 D Test Method 3015.7 – Human Body Model: ±2 kV (100 pF, 1.5 kΩ) – Machine Model: ±200 V (200 pF, 0Ω) Special Fail-safe IC U6808B 1. Description The U6808B is designed to support the fail-safe function of a safety critical system (e.g., ABS). It includes a relay driver, a watchdog controlled by an external R/C-network and a reset circuit initiated by an over and undervoltage condition of the 5-V supply providing a low-level reset signal. Figure 1-1. Block Diagram VS VS Bandgap reference 2.