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A6277ELW Datasheet(PDF) 5 Page - Allegro MicroSystems |
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A6277ELW Datasheet(HTML) 5 Page - Allegro MicroSystems |
5 / 12 page 6277 8-BIT SERIAL-INPUT, CONSTANT-CURRENT LATCHED LED DRIVER www.allegromicro.com 5 RECOMMENDED OPERATING CONDITIONS Characteristic Symbol Conditions Min. Typ. Max. Unit Supply Voltage VDD 4.5 5.0 5.5 V Output Voltage VO –1.0 4.0 V Output Current IO Continuous, any one output – – 150 mA IOH SERIAL DATA OUT – – -1.0 mA IOL SERIAL DATA OUT – – 1.0 mA Logic Input Voltage VIH 0.7VDD –– V VIL – – 0.3VDD V Clock Frequency fCK Cascade operation – – 10 MHz SWITCHING CHARACTERISTICS at TA = 25 °C, V DD = VIH = 5 V, VCE = 0.4 V, VIL = 0 V, REXT = 470 Ω, IO = 40 mA, VL = 3 V, RL = 65 Ω, CL = 10.5 pF. Limits Characteristic Symbol Test Conditions Min. Typ. Max. Unit Propagation Delay Time tpHL CLOCK-OUTn – 350 1000 ns LATCH-OUTn – 350 1000 ns ENABLE-OUTn – 350 1000 ns CLOCK-SERIAL DATA OUT1 – 80 110 ns Propagation Delay Time tpLH CLOCK-OUTn – 300 1000 ns LATCH-OUTn – 400 1000 ns ENABLE-OUTn – 380 1000 ns CLOCK-SERIAL DATA OUT2 – 80 110 ns Output Fall Time tf 90% to 10% voltage 150 250 1000 ns Output Rise Time tr 10% to 90% voltage 150 250 600 ns |
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