Description
The 4×4 Matrix Array 16-Key Membrane Switch Keypad is a compact input device featuring a 4×4 grid of 16 tactile switches arranged in a matrix configuration for efficient scanning with microcontrollers.
It connects via 8 pins (4 rows and 4 columns) for row-column multiplexing, reducing wiring complexity.
Rated for 35 V DC and 100 mA maximum current, it supports integration with 3.3 V or 5 V logic levels.
The keypad measures approximately 62 mm x 63 mm x 0.8 mm and uses a flexible membrane construction with polyester domes for tactile feedback.
Key specifications include a contact resistance of 10–500 Ω (depending on lead lengths and material), insulation resistance of 100 MΩ at 100 V, and dielectric strength of 250 V RMS (50–60 Hz, 1 minute).
The operating pressure ranges from 170–397 g (6–14 oz), with a switch travel of 0.6–1.5 mm and electric shock jitter under 5 ms.
It offers a lifespan of one million cycles per key and operates reliably from -40°C to +80°C, with storage conditions matching the operating range and humidity tolerance up to 90–95% RH for 240 hours.
Vibration resistance is rated at 20 G maximum (10–200 Hz).
Compatible with Arduino and Raspberry Pi via standard libraries for matrix scanning, it enables numeric and function key inputs.
Key Features
- Configuration: 4×4 matrix with 16 tactile keys for row-column scanning.
- Interface: 8-pin header (4 rows, 4 columns) for microcontroller connection.
- Voltage/Current: 35 V DC max, 100 mA max for low-power operation.
- Tactile Feedback: 170–397 g operating pressure, 0.6–1.5 mm travel.
- Durability: One million cycles per key, <5 ms jitter.
- Environmental: -40°C to +80°C operating/storage, 20 G vibration resistance.
- Resistance: 10–500 Ω contact, 100 MΩ insulation at 100 V.
- Dimensions: ~62 x 63 x 0.8 mm for compact mounting.
Common Applications
- Microcontroller Interfaces: Provides key input for Arduino or Raspberry Pi-based control panels.
- Industrial Controls: Enables operator input in equipment monitoring or automation systems.
- Security Systems: Supports PIN entry in access control or alarm setups.
- Consumer Devices: Integrates into calculators, remote controls, or POS terminals.
- Educational Prototyping: Demonstrates matrix scanning and input handling in learning projects.
Specifications
- Model: 4×4 Matrix Membrane Keypad
- Type: 16-Key Tactile Switch Array
- Configuration: 4 rows x 4 columns
- Keys: 16 (numeric 0-9, *, #, A, B, C, D)
- Interface: 8-pin matrix (rows/columns)
- Voltage Rating: 35 V DC
- Current Rating: 100 mA max
- Contact Resistance: 10–500 Ω
- Insulation Resistance: 100 MΩ (100 V)
- Dielectric Strength: 250 V RMS (50–60 Hz, 1 min)
- Jitter: <5 ms
- Lifespan: 1,000,000 cycles per key
- Operating Pressure: 170–397 g (6–14 oz)
- Switch Travel: 0.6–1.5 mm
- Operating Temperature: -40°C to +80°C
- Storage Temperature: -40°C to +80°C
- Humidity: 40–95% RH, 240 hours
- Vibration: 20 G max (10–200 Hz)
- Dimensions: ~62 x 63 x 0.8 mm
- Quantity: 1 pieces per pack
- Compatibility: Arduino, Raspberry Pi
Quality Assurance
Pacific Custom Engineering supplies genuine 4×4 membrane keypad modules, ensuring consistent performance for input and control applications.
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