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CD4511 - BCD To 7 Segment Latch Decoder Driver IC

CD4511 - BCD To 7 Segment Latch Decoder Driver IC

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  • High-output-sourcing capability up to 25 mA
  • Input latches for BCD Code storage
  • Lamp Test and Blanking capability
  • 7-segment outputs blanked for BCD input codes > 1001
  • 100% tested for quiescent current at 20 V
  • Max. input current of 1 µA at 18 V, over full package-temperature range, 100 nA at 18 V and 25°C
  • 5-V, 10-V, and 15-V parametric ratings

CD4511 - BCD To 7 Segment Latch Decoder Driver IC

The CD4511 IC types are BCD-to-7-segment latch decoder drivers constructed with CMOS logic and n-p-n bipolar transistor output devices on a single monolithic structure. These devices combine the low quiescent power dissipation and high noise immunity features of RCA CMOS with n-p-n bipolar output transistors capable of sourcing up to 25 MA. This capability allows the CD4511 types to drive LED's and other displays directly.

Lamp Test (LT)\, Blanking (BL)\, and Latch Enable or Strobe inputs are provided to test the display, shut off or intensity-modulated it, and store or strobe a BCD code, respectively. Several different signals may be multiplexed and displayed when external multiplexing circuitry is used.

The CD4x Series CD4511 types are supplied in 16-lead hermetic dual-in-line ceramic packages (F3A suffix), 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (NSR suffix), and 16-lead thin shrink small-outline packages (PW and PWR suffixes). These devices are similar to the type MC14511.

check out : CD4543 - BCD to 7 Segment Decoder IC


Pinout of CD4511 IC
Pin Name Pin # Type Description
VDD 16 Power Supply Voltage (+3 to +15V)
GND 8 Power Ground (0V)
a-f 9-15 Output Outputs for the 7-segment display
D0-D3 7, 1, 2, 6 Input 4-bit data input
LT 3 Input Lamp Test. Turns on all segments when LOW.
BL 4 Input Blanking Test. Turns off all segments when LOW.
LE 5 Input Latch Enable. Stores the current state when HIGH


  • Driving common-cathode LED displays
  • Multiplexing with common-cathode LED displays
  • Driving incandescent displays
  • Driving low-voltage fluorescent displays

Package Includes:

Selected qty of IC - CD4511


Part number CD40511B
Technology Family CD4000
VCC (Min) (V) 3
VCC (Max) (V) 18
Channels (#) 4
Voltage (Nom) (V) 10
F @ nom voltage (Max) (MHz) 8
ICC @ nom voltage (Max) (mA) 0.3
tpd @ nom Voltage (Max) (ns) 420
IOL (Max) (mA) 1.5
IOH (Max) (mA) -1.5
Configuration 04:07
Type Standard
Operating temperature range (C) -55 to 125

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1.What is CD4511 IC?

  • The CD4511 is a decoder that converts BCD to 7-segment data. It takes a binary number as an input and then displays it on a 7-segment display using its outputs.

2.How To Use the CD4511?

  • Connect the VDD pin to the positive supply terminal and the GND pin to the negative supply terminal first. You can use a power supply voltage ranging from 3V to 15V. However, some 4511 chip versions support up to 20V. For exact values, consult the datasheet for your chip's version. Pins D0, D1, D2, and D3 are the BCD inputs, through which you feed the binary number you want to display on the display. The output pins a through g are connected to your 7-segment display. The LT (Lamp Test) pin is used to ensure that all of the display's segments are operational. To test the segments, set to LOW. For normal operation, set to HIGH. When the BL (Blanking Test) pin is LOW, it disables all segments. With pulse-width modulation, you can control the brightness of the display (PWM). For normal operation, set to HIGH. The LE (Latch Enable) pin, also known as the store pin, is used to record the current value. When set to HIGH, the most recent data is displayed regardless of changes to the BCD inputs. For normal operation, set this pin to LOW.