HD74HC4511

HD74HC4511 BCD-to-Seven Segment Latch/Decoder/Driver Description The HD74HC4511 provides the functions of a 4-bit storage latch, a BCD-to-seven-segment decoder, and an output driver. Lamp test (LT), blanking (BI), and latch enable (LE) inputs are used to test the display, to turn off or pulse-modulate the brightness of the display, and to store a BCD code, respectively. Features High Speed Operation: tpd (A, B, C, D to a – g) = 31 ns typ (CL = 50 pF) High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) HD74HC4511 Function Table Inputs LE X X L L L L L L L L L L L L L L L L H Note: BI X L H H H H H H H H H H H H H H H H H LT L H H H H H H H H H H H H H H H H H H D X X L L L L L L L L H H H H H H H H X C X X L L L L H H H H L L L L H H H H X B X X L L H H L L H H L L H H L L H H X A X X L H L H L H L H L H L H L H L H X Outputs a H L H L H H L H L H H H L L L L L L * 1 b H L H H H H H L L H H H L L L L L L c H L H H L H H H H H H H L L L L L L d H L H L H H L H H L H L L L L L L L e H L H L H L L L H L H L L L L L L L f H L H L L L H H H L H H L L L L L L g H L H L H H H H H L H H L L L L L L Display 8 Blank 0 1 2 3 4 5 6 7 8 9 Blank Blank Blank Blank Blank Blank *1 1. Depends upon the BCD code previously applied when LE = O a f e d g c b 2 HD74HC4511 Pin Arrangement B C LT BI LE D A GND 1 2 3 4 5 6 7 8 (Top view) C LT BI LE D A...