TSOP1338 / SM338E Infrared Receiver 38kHz (IR Receiver Module)
The TSOP1338 IR Receiver is a miniaturized infrared sensor designed to receive modulated IR signals at a frequency of 38kHz. It integrates a PIN photodiode, preamplifier, automatic gain control, and demodulator in a single package, providing a clean digital output signal suitable for microcontrollers.
The SM338E is a functional equivalent commonly used as a compatible replacement, offering similar electrical characteristics and performance for IR remote control applications.
Key Features
- 38kHz IR Receiver optimized for remote control systems
- Integrated Photodiode Preamplifier and Demodulator
- High Immunity to Ambient Light and Electrical Noise
- Digital Output compatible with microcontrollers
- Low Power Consumption suitable for battery devices
- Internal Bandpass Filter for stable signal detection
Specifications
- Sensor Type: Infrared receiver module
- Carrier Frequency: 38kHz
- Supply Voltage: approx 2.5V to 5.5V
- Output Type: Digital active low
- Detection Range: up to approx 20m to 45m depending on transmitter
- Current Consumption: low microamp range
- Package Type: DIP 3 epoxy IR filter package
- Mounting Type: Through hole
Applications
- TV and AC remote control receivers
- Home automation systems
- IR communication circuits
- Robotics and embedded systems
- Wireless control interfaces
Pinout Configuration
- Pin 1: GND
- Pin 2: VCC
- Pin 3: OUT
Working Principle
- IR signal transmitted as 38kHz modulated pulses
- Receiver filters and amplifies only this frequency
- Demodulator converts signal to digital output
- Output decoded by microcontroller
