Published:2011/8/2 4:17:00 Author:Lucas | Keyword: 74 Series , digital circuit , BCD seven segment , decoder , driver | From:SeekIC
It can drive the effective high level output of light buffer; it has lamp test device; frontier, back porch are zero out; it can adjust the light intensity; 248 contains the boost resistor; 249 is the collector open circuit output, and the pin diagram is the same with 74246.
1. It requires 0 to 15, then the turning off input (BI) must remain high level, if it does not eliminate decimal zero, the dynamic turning off input (RBI) is open or high. If the low input is direct added to turning off input, all segment outputs are off regardless of the level of other inputs.
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