VISHAY TSOP2238 Infrared Receiver Module, 38kHz

The VISHAY TSOP2238 is a miniaturised infrared receiver module designed for remote control systems. It integrates a PIN photodiode and a preamplifier assembled on a lead frame within an epoxy package that contains an infrared filter. Its primary purpose is to receive and demodulate signals from a remote control, outputting a clean signal that can be directly interfaced with a microprocessor for easy decoding.

Key Features and Performance

The module combines the photo detector and preamplifier into a single, compact package, simplifying circuit design and saving space. It includes an internal filter for PCM frequency and offers improved shielding against electromagnetic interference (EMI), ensuring reliable signal reception even in electrically noisy environments. It boasts an impressive transmission range of up to 45 metres and features enhanced immunity against ambient light, reducing the chance of false triggering.

Technical Specifications

• Carrier Frequency: 38kHz, a standard for many remote control systems.
• Supply Voltage: Operates from a wide range of 2.5V to 5.5V, making it compatible with various logic families and microcontrollers.
• Directivity: 45°, providing a suitable reception angle.
• Supply Current: A low 950µA, contributing to energy-efficient designs.
• Operating Temperature: Functions reliably from -25°C to 85°C.
• Mounting: Side view through-hole package for straightforward PCB assembly.

Compatibility and Use

This IR receiver is designed for remote control applications in consumer electronics and industrial settings. It supports decoding for popular remote control codes including RC-5, RC-6, Panasonic, NEC, Sharp, r-step, and Thomson RCA. Its automatic gain control (AGC2) helps maintain consistent performance, and it offers a detection sensitivity of 0.12mW/m². It is important to note that this component