U6433B_05 Datasheet, PDF (1/8 Pages) ATMEL Corporation – Flasher, 18-m Shunt, Frequency Doubling Disabling

Features
• Temperature and Voltage Compensated Frequency
• Warning Indication of Lamp Failure by Means of Frequency Doubling can be Disabled
• Voltage Dependence of the Car Indicator Lamps Compensated for Lamp Failure
• Relay Output with High Current Carrying Capacity and Low Saturation Voltage
• Minimum Lamp Load for Flasher Operation ≥ 1W
• Load-dump Protection
• Very Low Susceptibility to EMI
• Protection According to ISO/TR 7637/1 Level 4
1. Description
The design of the U6433B is similar to that of U6043B, both devices have the same
excellent EMC (Electro Magnetic Capability) and protection features. The U6433B
includes an additional 8-mV comparator and a logical connection with the frequency
doubling stage. This combination can be used for a hazard switch which bypasses the
external shunt resistor to disable the frequency doubling. This feature is especially
important with respect to the US automotive industry. During direction mode the
U6433B works like other flashers, that is, frequency doubling in the case of lamp
outage.
Flasher, 18-mΩ
Shunt,
Frequency
Doubling
Disabling
U6433B
Rev. 4810B–AUTO–10/05