cd4511-bcd-7segment-decoder

Important Note

This entire repo was AI created - including all of the data within. The intent was to A) help me with my personal electronics inventory; and B) see how I could use AI to make that process a bit easier. DO NOT TRUST!

CD4511 - BCD to 7-Segment Decoder/Driver

Details

• Location: Cabinet-3, Bin 35, Section A
• Category: Logic ICs
• Brand: Texas Instruments
• Part Number: CD4511
• Package: 16-DIP
• Quantity: 40
• Status: Available
• Price Range: $0.50-1.50
• Datasheet: CD4511B Datasheet
• Product URL: https://www.ti.com/product/CD4511B

Description

The CD4511 is a CMOS BCD to 7-segment latch/decoder/driver IC designed to drive common-cathode 7-segment LED displays directly from a binary-coded decimal (BCD) input. This versatile IC converts 4-bit BCD data into the appropriate signals to display digits 0-9 on a 7-segment display, making it ideal for digital clocks, counters, and numeric displays.

Specifications

Electrical Characteristics

• Operating Voltage: 3V ~ 18V
• Maximum Clock Frequency: Up to 8 MHz
• Output Current: 1.5mA per segment output (low level)
• Power: Low power CMOS consumption
• Interface: BCD Input, 7-Segment Output
• Technology: CMOS

Physical Characteristics

• Package: 16-DIP (0.300”, 7.62mm)
• Dimensions: Standard 16-pin DIP package
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Through Hole

Key Features

• BCD to 7-segment decoder/driver with latch
• Drives common-cathode 7-segment displays directly
• Built-in latch function for stable display
• Blanking input for display control
• Lamp test input for testing all segments
• CMOS technology for low power consumption
• Wide operating voltage range (3V-18V)

Image

Image needed - Standard 16-pin DIP package IC with CD4511 markings on top. Consider taking a photo of actual component for documentation.

Pinout Diagram

Pin Descriptions (16-DIP Package)

Pin	Name	Function
1	e	Segment E output
2	d	Segment D output
3	DP	Decimal Point output
4	c	Segment C output
5	g	Segment G (middle bar) output
6	b	Segment B output
7	a	Segment A (top bar) output
8	VSS	Ground
9	f	Segment F (upper left bar) output
10	A0	BCD input bit 0 (LSB)
11	A1	BCD input bit 1
12	A2	BCD input bit 2
13	A3	BCD input bit 3 (MSB)
14	LT	Lamp Test input (active low)
15	BI	Blanking Input (active low)
16	VDD	Positive power supply

Applications

Common use cases and applications for this component:

• Digital clocks and timers
• Frequency counters and digital meters
• Numeric displays for microcontroller projects
• LED 7-segment display drivers
• BCD data visualization
• Calculator displays
• Digital panel meters
• Process control displays

Circuit Examples

Basic 7-Segment Display Driver

VDD (Pin 16) ---- +5V to +18V
VSS (Pin 8)  ---- Ground
A0-A3 (Pins 10-13) -- BCD input from microcontroller
a-g, DP (Pins 1-7, 9) -- To 7-segment display segments
LT (Pin 14) ----- Lamp test control (tie high if not used)
BI (Pin 15) ----- Blanking control (tie high if not used)

Microcontroller Interface

Arduino/MCU BCD Output -> CD4511 BCD Input (A0-A3)
CD4511 Segment Outputs -> Current limiting resistors -> 7-segment display
Common cathode of display -> Ground

Technical Notes

Important technical considerations and features:

• Designed specifically for common-cathode 7-segment displays
• Built-in latch holds display data stable until updated
• BCD inputs A0-A3 represent binary values 0-15, but only 0-9 produce valid outputs
• Invalid BCD codes (10-15) result in blank display
• Lamp Test (LT) input tests all segments when pulled low
• Blanking Input (BI) blanks the display when pulled low
• Output current is sufficient to drive most LED displays directly
• Use current-limiting resistors (typically 220-470Ω) for LED segments
• Proper power supply decoupling recommended near VDD/VSS pins

Tags

logic-ic, decoder, driver, bcd-decoder, 7-segment, cmos, texas-instruments cabinet-3 bin-35 status-available

Notes

The CD4511 is a very popular and widely used CMOS IC for driving 7-segment displays. It simplifies microcontroller projects by reducing the number of pins needed to control numeric displays from 7+ pins down to just 4 BCD input pins. The built-in latch function is particularly useful for maintaining stable displays while the microcontroller is busy with other tasks. This IC is essential for any project requiring numeric LED displays.