U643B - Flasher IC

ATMEL Corporation

The U643B by ATMEL Corporation is a Flasher IC. Below is the official datasheet preview.

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U643B Flasher IC by ATMEL Corporation - Datasheet Preview — Official preview page of the **U643B** Flasher IC datasheet (ATMEL Corporation).

Datasheet Details

Part number	U643B
Manufacturer	ATMEL Corporation
File Size	214.64 KB
Description	Flasher IC
Datasheet	U643B_ATMELCorporation.pdf
Additional preview pages of the U643B datasheet.

U643B Product details

Description

The bipolar integrated circuit U643B is used in relay-controlled automotive flashers where a high-level EMC is required. AUTO 09/05 2. Block Diagram Figure 2-1. Car Flasher Application Circuit, Resistor R1 and R2: 0.25W; R4 for Protection Against Continuous Reversed Polarity: 0.5W C1 4 6 Measuring comparator K 1 V 6-81 mV 20 kΩ K1 2 5 kΩ 7 R3 Shunt 30 mΩ + V

Features

Temperature and Supply Voltage Compensated Flashing Frequency.
Frequency Doubling Indicates Lamp Outage.
Relay Driver Output with High Current Carrying Capacity and Low Saturation Voltage.
Minimum Lamp Load for Flasher Operation: ≥ 1W.
Very Low Susceptibility to EMI.
Protection According to ISO/TR 7637/1 Level 4 Flasher IC with 30-mΩ Shunt 1.

📁 U643B Similar Datasheet

U6433B - Flasher/ 18-m Shunt/ Frequency Doubling Disabling (TEMIC Semiconductors)
U642B - Automotive Wipe/Wash or Interval Switch (TEMIC Semiconductors)
U644B - Flasher/ 18-m Shunt/ Extremly Low Current Consumption (TEMIC Semiconductors)
U644B-FP - Flasher/ 18-m Shunt/ Extremly Low Current Consumption (TEMIC Semiconductors)

Other Datasheets by ATMEL Corporation

U643 - Flasher/ 30-mohm Shunt
U6432B - Low-power Flasher IC with 18-mOMShunt
U641B - INTERVAL AND WIPE/WASH WIPER CONTROL IC

Published: Apr 16, 2005 |