CD4511BM Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – BCD-to-7 Segment Latch/Decoder/Driver

February 1988
CD4511BM CD4511BC BCD-to-7 Segment
Latch Decoder Driver
General Description
The CD4511BM CD4511BC BCD-to-seven segment latch
decoder driver is constructed with complementary MOS
(CMOS) enhancement mode devices and NPN bipolar out-
put drivers in a single monolithic structure The circuit pro-
vides 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 emit-
ting 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
Y _{Low logic circuit power dissipation}
Y _{High current sourcing outputs (up to 25 mA)}
Y _{Latch storage of code}
Y _{Blanking input}
Y _{Lamp test provision}
Y _{Readout blanking on all illegal input combinations}
Y _{Lamp intensity modulation capability}
Y _{Time share (multiplexing) facility}
Y _{Equivalent to Motorola MC14511}
Connection Diagram
Dual-In-Line Package
Top View
Order Number CD4511B
Segment Identification
TL F 5991 – 1
Truth Table
Inputs
Outputs
LE BI LT D C B A a b c d e f g Display
X X 0 XXXX1111111 B
X 0 1 XXXX0000000
0 1 1 0 0 0 01111110 0
0 1 1 0 0 0 10110000 1
0 1 1 0 0 1 01101101 2
0 1 1 0 0 1 11111001 3
0 1 1 0 1 0 00110011 4
0 1 1 0 1 0 11011011 5
0 1 1 0 1 1 00011111 6
0 1 1 0 1 1 11110000 7
0 1 1 1 0 0 01111111 8
0 1 1 1 0 0 11110011 9
0 1 1 1 0 1 00000000
0 1 1 1 0 1 10000000
0 1 1 1 1 0 00000000
0 1 1 1 1 0 10000000
0 1 1 1 1 1 00000000
0 1 1 1 1 1 10000000
1 1 1 XXXX
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 – 2
C1995 National Semiconductor Corporation TL F 5991
RRD-B30M105 Printed in U S A