CD4511 BCD to 7-segment Latch Decoder Driver

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The CD4511 is a part of the CD4000 CI series. CD4511 BCD-to-seven segment decoder driver is constructed with 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. The IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers.

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What is BCD To 7-Segment Decoder?

A BCD to Seven Segment decoder is a combinational logic circuit that accepts a decimal digit in BCD (input) and generates appropriate outputs for the segments to display the input decimal digit.

CD4511 Key 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

CD4511 Pinout

Pin No	Pin Name	Description
1	IN B	input pin B
2	IN C	input pin C
3	LT’	invert Display test pin
4	BL’	invert blank input pin
5	LE	latch enable / store pin
6	IN D	input pin D
7	IN A	input pin A
8	VSS	source supply
9	E	output pin E of latch
10	D	output pin D of latch
11	C	output pin C of latch
12	B	output pin B of latch
13	A	output pin A of latch
14	G	output pin G of latch
15	F	output pin F of latch
16	VDD	drain supply