CD4510BC Datasheet | National Semiconductor

Description The CD4511BM CD4511BC BCD-to-seven segment latch decoder driver is constructed with plementary MOS (CMOS) enhancement mode devices and NPN bipolar output drivers in a single monolithic structure The circuit provides the functions of a 4-bit storage latch an 8421 BCD-toseven segment decoder and an output drive capability 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 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 Features Y Y Y Y Y Y Y Y Y Low logic circuit power dissipation High current sourcing outputs (up to 25 m A) Latch storage of code Blanking input Lamp test provision Readout blanking on all illegal input binations Lamp intensity modulation capability Time share (multiplexing) facility Equivalent to Motorola MC14511 Connection Diagram Dual-In-Line Package Truth Table Inputs X X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 X 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 X X 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 X X X 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 X X X 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 X X X 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 X 1 0 1 0 1 1 0 1 0 1 1 1 0 0 0 0 0 0 1 0 1 1 1 1 1 0 0 1 1 1 0 0 0 0 0 0 1 0 1 1 0 1 1 1 1 1 1 1 0 0 0 0 0 0 1 0 1 0 1 1 0 1 1 0 1 0 0 0 0 0 0 0 Outputs 1 0 1 0 1 0 0 0 1 0 1 0 0 0 0 0 0 0 1 0 1 0 0 0 1 1 1 0 1 1 0 0 0 0 0 0 1 0 0 0 1 1 1 1 1 0 1 1 0 0 0 0 0 0 B 0 1 2 3 4 5 6 7 8 9 LE BI LT D C B A a b c d e f g Display TL F 5991 - 1 Top View Order Number CD4511B Segment Identification X e Don’t Care Depends upon the BCD code applied during the 0 to 1 transition of LE Display TL F 5991- 3 TL F 5991 -...