4×4 Matrix 16-Key Membrane Switch Keypad with Ribbon Cable

4×4 Matrix 16-Key Membrane Switch Keypad with Ribbon Cable is an ultra-thin, flexible numeric input keypad featuring 16 tactile membrane keys arranged in a 4-row by 4-column matrix (digits 0-9, letters A-D, and symbols * and #). Terminating in a standard 8-pin 2.54mm pitch DuPont female connector, it connects directly to microcontrollers like Arduino, STM32, and Raspberry Pi using open-source matrix keypad scanning routines.

Key Features:

• Standard 16-Key Layout: Features 0-9, A-D, *, and # keys for complete alphanumeric and menu navigation.
• Ultra-Thin Membrane Profile: Thin, flexible self-adhesive backing allows peel-and-stick mounting onto smooth flat panels.
• Matrix Scanning Efficiency: Connects 16 individual switches using only 8 microcontroller GPIO lines (4 rows × 4 columns).
• Tactile Click Feedback: Tactile metal dome switches underneath each key provide positive tactile clicking sensation upon actuation.
• Durable Polyester Overlay: Sealed surface resists dust, moisture, and everyday wear.
• Standard DuPont Connector: 8-pin 2.54mm pitch connector easily mates with standard breadboards and male pin headers.

Technical Specifications:

• Maximum Rating: 35V DC, 100 mA
• Contact Resistance: 10 Ω to 500 Ω (depending on trace length)
• Insulation Resistance: 100 MΩ at 100V DC
• Dielectric Withstand: 250V Rms (50-60Hz for 1 minute)
• Contact Bounce: Less than 5 ms
• Actuation Force: 170 to 397 grams (6 to 14 oz)
• Switch Life Expectancy: > 1,000,000 actuations per key
• Operating Temperature: -20°C to +40°C

Mechanical Specifications:

• Backing: 3M self-adhesive peel-away sticker backing
• Connector: 8-Pin 2.54mm (0.1″) pitch female DuPont connector
• Ribbon Cable Length: Approximately 85 mm
• Weight: Approximately 8 grams

Dimensions:

• Keypad Width: 69.0 mm
• Keypad Height: 76.0 mm
• Thickness: 0.8 mm

Pinout and Wiring:

• Pins 1 to 4: Rows 1, 2, 3, 4
• Pins 5 to 8: Columns 1, 2, 3, 4

Datasheet Reference:

• Datasheet Reference: Consult standard matrix keypad scanning row-column timing documentation and Arduino Keypad.h library reference.

Commonly Used in:

• Security alarm code entry panels and electronic safe locks
• Industrial automation parameter entry consoles
• Access control card reader PIN pads
• Educational student robotics and embedded computing projects

Applications:

• Entering security passcodes and PINs into microcontroller door locks
• Navigating multi-level settings menus on character LCDs
• Telephone dialing simulators and DTMF tone generators
• Calculator and measurement instrument user input interfaces

Equivalent Models:

• 4×3 Matrix 12-Key Membrane Keypad
• 4×4 Tactile Button Matrix Keypad Module
• TTP229 16-Key Touch Sensor Board

Package Includes:

• 1 × 4×4 Matrix 16-Key Membrane Switch Keypad with Ribbon Cable