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U644B-FP - Flasher/ 18-m Shunt/ Extremly Low Current Consumption

General Description

The bipolar integrated circuit, U644B, is used in relaycontrolled automotive flashers where a high level EMC is required.

Lamp outage is indicated by frequency doubling during hazard warning as well as direction mode.

Key Features

  • D Frequency doubling indicates lamp outage D Frequency independent of temperature and voltage change D Minimum lamp load for flasher operation: D Very low susceptibility to EMI 1 W D Relay driver output with high current-carrying capacity and low saturation voltage D Protection according to ISO TR7637/1 level 4 D Control input (Kl 15) Ordering Information Extended Type Number U644B U644B-FP Package DIP8 SO8 Remarks Block Diagram R5 10 kW 30 2 Measuring comparator K 1 V S.
  • 49 mV 4.

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Other Datasheets by TEMIC Semiconductors (now Microchip)

Part Number Description
U644B Flasher/ 18-m Shunt/ Extremly Low Current Consumption
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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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U644B Flasher, 18-mW Shunt, Extremly Low Current Consumption Description The bipolar integrated circuit, U644B, is used in relaycontrolled automotive flashers where a high level EMC is required. Lamp outage is indicated by frequency doubling during hazard warning as well as direction mode. If the flasher module provides an 4-pin connector the control pin of U644B (Pin 6) can be used to operate the IC in an extremly low-current mode.