CD4511BC.pdf

The CD4511BC BCD-to-seven segment latch/decoder/
driver is constructed with complementary 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-to-seven
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, computer/calculator display driver, cockpit
display driver, and various clock, watch, and timer uses.
Features

Low logic circuit power dissipation

High current sourcing outputs (up to 25 mA)

Latch storage of code

Blanking input

Lamp test provision

Readout blanking on all illegal input combinations

Lamp intensity modulation capability

Time share (multiplexing) facility

Equivalent to Motorola MC14511