TSOP6438TT

TSOP6438TT is a 38 kHz infrared receiver module from Vishay for remote-control systems. It integrates the IR photodiode, preamplifier, automatic gain control, 38 kHz band-pass filter, and a demodulator with a clean digital output.
Key points:
- Supply: 4.5–5.5 V; typical current of a few milliamps.
- Output: TTL/CMOS logic, active low (idle high); no external demodulation needed.
- Range/protocols: works with standard 38 kHz remotes and common protocols (NEC, RC5/RC6, Sony SIRC); requires line-of-sight.
- Pinout: Vcc, GND, OUT (3-pin package); TSOP6438TT often supplied in Tape & Reel.
- Use: ideal for TVs, set-top boxes, audio gear; include a nearby decoupling capacitor (e.g., 0.1 µF).
Notes: sensitive to ambient light and alignment; detects only modulated 38 kHz IR signals.

TSOP6438TT is a 38 kHz IR remote control demodulator (3-pin). Equivalents (same function/pinout) include Vishay TSOP1738, TSOP1838 and TSOP4838. Other vendors’ 3-pin 38 kHz IR receivers (e.g., VS1838B modules) can be used as substitutes, provided voltage, timing, and output logic match your design.

Key features of TSOP6438TT (38 kHz IR receiver):
- 38 kHz remote-control IR receiver with demodulated output
- Integrated preamplifier, automatic gain control (AGC), and input filtering
- Demodulated, active-low TTL/CMOS-compatible output
- Wide supply range: typically 4.5–5.5 V
- Low standby current and overall low power consumption
- Robust ambient-light rejection and narrow-band IR filter
- Suitable for most 38 kHz protocols (e.g., NEC, RC5/RC6, Sony SIRC)
- Small, 3-pin package (Vcc, GND, Out) suitable for compact electronics
- No external components required for basic operation
Note: exact packaging suffix (TT) denotes packaging/lot type; electrical behavior remains as described.

- Pin count: 8 pins (TSOP/SOP package)
- Function: 38 kHz infrared receiver with demodulator for remote-control signals; outputs a TTL/CMOS-compatible data signal (active low) representing the received code. Includes internal preamp, AGC, and filtering; requires Vcc and GND.

- Manufacturer: Vishay Intertechnology, Inc. (Vishay)
- Company type: A global, publicly traded manufacturer of electronic components and semiconductors, including optoelectronics, discrete semiconductors, and passive components.

Typical application areas for TSOP6438TT (38 kHz IR receiver):
- Remote-control receivers for consumer electronics (TVs, set-top boxes, DVD/Blu-ray players, audio/video receivers)
- Remote control of home appliances (air conditioners, microwaves, washing machines, fans)
- IR data/command links for short-range wireless control in AV gear
- Industrial control panels and equipment using simple IR remote inputs
Notes: used for demodulating 38 kHz IR signals with built-in AGC for reliable operation.

TSOP6438TT uses a small 4-pin surface-mount package (SOP-4).