The UM2154-(TX)/UNR215 is a silicon epitaxial planar type phototransistor from Panasonic. It is designed for various light detection and control applications, converting light energy into an electrical signal. The 'TX' suffix may denote a specific packaging or performance variant, while the 'UNR215' may represent a component marking code or a related part number.

Applications

• Optical sensors
• Light barriers
• Encoders
• Optical switches
• Remote control systems
• Light level detectors

Features

• High sensitivity to infrared light
• Fast switching speed
• Compact package size
• Epitaxial planar structure for stable performance
• Good linearity

Benefits

• Reliable light detection
• Precise control of light-activated circuits
• Space-saving design in compact devices
• Stable and consistent performance over a range of operating conditions
• Accurate signal transduction

Additional Details

The UM2154-(TX)/UNR215 phototransistor responds primarily to infrared light, making it suitable for applications involving IR LEDs or other IR light sources. Important specifications to consider are collector-emitter breakdown voltage (VCEO), collector current (IC), dark current, and rise/fall times. The package type can vary, but it's typically a through-hole or surface-mount package designed for easy integration into circuit boards. The spectral response curve indicates the sensitivity of the phototransistor to different wavelengths of light.

When designing with this component, ensure proper biasing to optimize performance. Consider using a load resistor to convert the collector current into a voltage signal. The value of the load resistor depends on the desired sensitivity and the supply voltage. Shielding the phototransistor from ambient light may be necessary to improve accuracy in some applications. Consult the Panasonic datasheet for detailed specifications, application notes, and recommended operating conditions to achieve optimal and reliable performance.