EL Dynamic Display Technologies LLP

4x4 Matrix Membrane Keypad High Performance, Ultra thin Interface Solutions

Our 16-button 4x4 matrix membrane keypad is a versatile and durable human interface component designed for seamless integration into microcontroller-based projects. Featuring an ultra-thin design (0.5 MM to 1.5 MM) and 3M adhesive backing (IPC62 standard), it offers a reliable, cost-effective, and space-saving solution for various industrial and commercial applications.

Features

Ultra thin design	0.5 MM to 1.5 MM
Adhesive backing	Use 3M for IPC62
Performance ratio	100%
Easy interface to any microcontroller	Programmer available in google

Advantages

Flat & Flexible - Ideal for compact designs requiring a sleek, low-profile interface.
Sealed & Durable - Resistant to dust, moisture, and contaminants, perfect for harsh environments.
Cost-Effective - A high-quality yet affordable alternative to traditional keypads.
Customizable - Options for graphic overlays, key sizes, and shapes to match unique requirements.

4x4 matrix membrane keypads are commonly used in a wide range of applications, including:

Consumer Electronics – Remote controls, calculators, and home appliances.
Medical Devices - Blood pressure monitors, infusion pumps, and diagnostic equipment.
Industrial Control Panels - Machinery, automation systems, and equipment interfaces.
Point-of Sale (POS) System - Secure keypads for payment terminals and self-service kiosks.

4x4 Matrix Membrane Keypad

Our high-performance membrane keypad undergoes rigorous testing to ensure durability, reliability, and seamless integration into various applications. Below are the detailed specifications:

Keypad Specification

Test	Standard specifications	Actual testing result
Numbers of keys	16	16
Key arrangement	4 rows x 4 columns	4 rows x 4 columns
Key label	0-9,*,#, A,B,C,D	0-9,*,#, A,B,C,D
Interface	Matrix scanning	Achieved
Operating voltage	5 VDC TO 24 VDC	24 VDC checked
Operating current	10 mA to 30 Ma	15mA
Operating temperature	-10°C to + 70 °C	+ 35 degree checked
Key travel	0.1 to 0.5 mm	0.03 mm
Key force	50 gm to 150 gm	100 gm
Bounce time	Less then 35ms	<=15ms
Life testing	1 million actuations per key	still continues20000 done
Dimensions (L x W x H)	NA	160mm x70mm x1.5mm
Tail Length	Optional	3-1/3" or 85mm (include connector)
Connector Type	8 pins / 2.54pinch	FRC 8 pins(2.54 pinch)
Overlay Material	Optional	Polyester 100 micron
Backlighting	Optional	NA
Overlay Graphics	Screen / digital printing	Digital
Embossing/Debossing	+0.5 mm – less 3mm	+ 1.5 mm
Key Actuation Force	+ 50gm – less 250gm	100gm
Environmental Sealing	Optional	Done with 3M
Weight	Optional	8 gms
Mount Style	Self –adhesive	Self-Adherence

How Keypad Works

Matrix Keypad - Functionality & Connection Overview

A 4x4 matrix keypad operates using a structured combination of four rows and four columns, providing efficient button state detection for microcontrollers and host devices. Each key contains an embedded push-button switch, where one terminal is connected to a row and the other to a column.

How It Works ?

The microcontroller scans the keypad by sequentially pulling each of the four column pins (1-4) HIGH or LOW while monitoring the state of the four row pins (5-8).
When a key is pressed, it completes a circuit between a specific row and column, enabling the microcontroller to identify the exact key pressed. This method ensures an efficient, low-power, and interference-free way to register key inputs.

Membrane Keypad