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Overview
This IR demodulator from Vishay is a general-purpose receiver for IR-based remote-control projects. It is intended as detector for data formats that are modulated at 38 kHz and have at least 10 cycles/burst; popular IR-codes that meet these requirements are NEC, Sharp, and r-step (our Mini IR Remote Control uses NEC encoding, so it works well with the TSOP38438). The module’s output signal can be directly connected to a microcontroller; no additional external components are required. See the TSOP38438 datasheet (132k pdf) for more information.
For a similar IR detector that is tuned for a 56 kHz carrier frequency, see the Vishay TSOP34156.
Modulated IR detector comparison
| Part | TSOP34156 | TSOP38438 | TSSP58P38 | TSSP58038 |
|---|---|---|---|---|
| Intended function | IR remote control | brightness/proximity sensing | predictable modulated IR presence sensing | |
| Modulation frequency | 56 kHz | 38 kHz | 38 kHz | 38 kHz |
| Gain (sensitivity) | automatic but inaccessible | automatic, predictable | fixed high gain | |
| Output | binary (data) | analog (pulse width) | binary (on/off) | |
| Update rate | a few kHz | a few Hz | a few kHz | |
Specifications
- Operating Voltage: 2.5 V to 5.5 V
- Carrier Frequency: 38 kHz
- Package: Through-hole with 0.1″ lead spacing
See the TSOP384 datasheet (132k pdf) for more detailed specifications.
