U643B ATMEL Corporation, U643B Datasheet
U643B
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U643B Summary of contents
Page 1
... Flasher, 30-mW Shunt Description The bipolar integrated circuit U643B is used in relay- controlled automotive flashers where a high-level EMC is required. Features D Temperature and supply voltage compensated flashing frequency D Frequency doubling indicates lamp outage D Relay driver output with high current carrying capacity and low saturation voltage ...
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... K3. During the bright phase the voltage at Pin 8 is above the K2 threshold, during the dark phase it is below the K3 threshold. For proper start conditions a minimum lamp wattage required U643B OSC 94 9290 Figure 2. Pinning / shunt to Pin and an internal comparator K1 with its = 12 V). The outage ...
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... Pin 2 and 6 V (+49) S Pin 2 and Pin 3 150 mA Pin Pin Pin U643B Value Unit 16.5 V 1.5 1 1.0 1 0.3 A 420 mW 340 340 mW mW 690 mW 560 mW 150 C –40 ... + 95 C –55 ... + 150 C Value Unit 110 K/W 160 K/W (+49, Pin 2 and Min. Typ. Max. Unit ...
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... U643B Package Information Package DIP8 Dimensions Package SO8 Dimensions in mm 0.4 1. (5) 9.8 9.5 1.64 1.44 4.8 max 6.4 max 3.3 0.5 min 0.36 max 0.58 2.54 0.48 7.62 5 technical drawings according to DIN specifications 4 5.2 4.8 5.00 4.85 3.7 1.4 0.25 3 ...
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... Data sheets can also be retrieved from the Internet: Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 Rev. A3, 10-Apr-01 U643B http://www.atmel–wm.com 5 (5) ...