MM54HC4511 Datasheet | National Semiconductor

Description This high speed latch decoder driver utilizes advanced silicon-gate CMOS technology It has the high noise immunity and low power consumption of standard CMOS integrated circuits as well as the ability to drive 10 LS-TTL loads The circuit provides the functions of a 4-bit storage latch an 8421 BCD-to-seven segment decoder and an output drive capability Lamp test (LT) blanking (Bl) 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 It can be used with seven-segment light emitting diodes (LED) incandescent fluorescent gas discharge or liquid crystal readouts either directly or indirectly Applications include instrument (e g counter DVM etc ) display driver puter calculator display driver cockpit display driver and various clock watch and timer uses The 54HC 74HC logic family is speed function and pinout patible with the standard 54LS 74LS logic family All inputs are protected from damage due to static discharge by internal diode clamps to VCC and ground Features Latch storage of input data Blanking input Lamp test input Low power consumption characteristics of CMOS devices Wide operating voltage range 2 to 6 volts Low input current 1 m A maximum Low quiescent current 80 m A maximum over full temperature range (74 Series) Connection Diagram Dual-In-Line Package Truth Table INPUTS OUTPUTS LE BI LT D C B A a b c d e f g DISPLAY x x L L L L L L L L L L L L L L L L H x L H H H H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H x x L L L L L L L L H H H H H H H H x x x L L L L H H H H L L L L H H H H x x x L L H H L L H H L L H H L L H H x x x L H L H L H L H L H L H L H L H x H L H L H H L H L H H H L L L L L L H L H H H H H L L H H H L L L L L L H L H H L H H H H H H H L L L L L L H L H L H H L H H L H L L L L L L L H L H L H L L L H L H L L L L L L L H L H L L L H H H L H H L L L L L L H L L L H H H H H L H H L L L L L L 8 0...