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Home > Products > Sensors, Transducers > Optical Sensors > Photo Detectors - Remote Receiver

Vishay Semiconductor Opto Division TSOP39438TR

Name: TSOP39438TR
Brand: Vishay Semiconductor Opto Division
SKU: TSOP39438TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSOP39438TR

Manufacturer:: Vishay Semiconductor Opto Division

Category:: Photo Detectors - Remote Receiver

Package:

Datasheet:: TSOP39438TR.pdf

Description:: SENSOR REMOTE REC 38.0KHZ 45M

Quantity:: RFQ Add To RFQ list

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Inventory:2,979

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Product details

Overview

TSOP39438TR from Vishay Semiconductors is a 38 kHz infrared (IR) receiver module optimized for NEC, Sharp, and Mitsubishi remote control protocols in noisy environments. It features AGC4-level noise immunity, 2.0–5.5 V supply range, <0.45 mA typical supply current at 3.3 V, ±45° half-angle directivity, and demodulated active-low output directly interfaced to microcontrollers. Used in consumer IR remotes requiring robust operation under fluorescent lighting and LCD TV interference.

For engineers reviewing the TSOP39438TR datasheet, TSOP39438TR pinout, TSOP39438TR application, or TSOP39438TR equivalent, key selection criteria include carrier frequency match (38 kHz), AGC4 noise suppression level, GND/VS/OUT pin configuration, optical sensitivity (0.1–0.2 mW/m² for NEC code), and TVCast package compatibility with standard IR PCB layouts.

Technical Context

The TSOP39438TR integrates a PIN photodiode and preamplifier in a single epoxy package with built-in IR bandpass filter centered at 38 kHz. Its AGC4 architecture dynamically reduces gain during strong ambient IR disturbances-such as fluorescent lamp emissions-to suppress false triggering while maintaining ≥30 m transmission distance with TSAL6200 emitter.

It implements envelope detection with burst-length-dependent AGC response: minimum 10 cycles/burst, ≥12-cycle gap required between bursts, and supports up to 1700 short bursts/second. Output is active-low, TTL-compatible, and designed for direct connection to MCU GPIO without external conditioning.

Key Specifications

Parameter	Value and Actual Design Meaning
Carrier frequency	38 kHz - precisely matched to NEC, Sharp, and Mitsubishi remote protocols
Supply voltage	2.0 V to 5.5 V - enables direct interface with 3.3 V or 5 V microcontrollers
Supply current	0.25–0.45 mA at 3.3 V - enables battery-powered remote receivers with multi-year life
Min. irradiance (NEC)	0.1–0.2 mW/m² - ensures reliable decoding at >10 m range under typical indoor conditions
Directivity (±θ₁/₂)	±45° - provides wide-angle reception suitable for living-room TV remote use
Output logic	Active-low, open-collector compatible - simplifies MCU input design with pull-up only
Operating temp.	−25 °C to +85 °C - supports deployment in consumer electronics enclosures without thermal derating

Pinout & Package

TSOP39438TR uses the TVCast surface-mount package (6.8 mm × 2.6 mm × 5.3 mm) with gull-wing leads and integrated IR filter. The package is leaded, RoHS-compliant, and optimized for automated placement and reflow soldering.

Pin/Terminal	Circuit Role	Design Meaning
1, 4	GND	Dual ground terminals reduce impedance and improve noise rejection in high-EMI environments
2	VS	Single-supply input (2.0–5.5 V); decoupling capacitor recommended near pin for ripple suppression
3	OUT	Demodulated active-low output; sinks up to 5 mA; requires external pull-up to VS for MCU interface

Key Features

Feature	Design Value
AGC4 noise immunity	Suppresses interference from fluorescent lamps, LCD TVs, and Wi-Fi via adaptive gain reduction
Integrated IR filter	Blocks visible light and ambient IR outside 850–1050 nm band, improving signal-to-noise ratio
Low-power standby	0.25 mA typical quiescent current enables multi-year battery life in remote receivers
Burst-length discrimination	Rejects spurious signals shorter than 10 cycles or violating gap timing rules (≥12 cycles)
TTL-compatible output	Active-low output drives standard MCU GPIO without level-shifting or external logic

Applications

TV Remote Control	Set-Top Box Interface
Use Scenario: Consumer hand-held remote transmitting NEC-coded commands to flat-panel TVs. IC Role / Device Role / Timing Role: IR signal demodulator and AGC-controlled envelope detector operating at 38 kHz carrier. Use Value: Enables reliable command reception up to 30 m in rooms with multiple fluorescent lights and adjacent Wi-Fi routers.	Use Scenario: IR-based navigation and menu control for cable/satellite set-top boxes. IC Role / Device Role / Timing Role: Protocol-specific decoder front-end for RC-5 and Sharp codes with automatic gain adjustment. Use Value: Eliminates need for external filtering or software debouncing due to hardware-level noise rejection.
Home Theater System	Air Conditioner Remote
Use Scenario: Multi-device universal remote controlling AV receivers, projectors, and streaming sticks. IC Role / Device Role / Timing Role: High-immunity IR receiver supporting Mitsubishi and Panasonic protocols with long-burst tolerance. Use Value: Maintains consistent responsiveness across diverse IR emitters and ambient lighting conditions.	Use Scenario: Battery-powered AC remote operating in hot, humid environments with strong ambient IR. IC Role / Device Role / Timing Role: Low-quiescent-current IR sensor with −25 °C to +85 °C operational range. Use Value: Delivers stable performance without thermal drift or false triggers in unconditioned spaces.

TV Remote Control

Set-Top Box Interface

Use Scenario: Consumer hand-held remote transmitting NEC-coded commands to flat-panel TVs.

IC Role / Device Role / Timing Role: IR signal demodulator and AGC-controlled envelope detector operating at 38 kHz carrier.

Use Value: Enables reliable command reception up to 30 m in rooms with multiple fluorescent lights and adjacent Wi-Fi routers.

Use Scenario: IR-based navigation and menu control for cable/satellite set-top boxes.

IC Role / Device Role / Timing Role: Protocol-specific decoder front-end for RC-5 and Sharp codes with automatic gain adjustment.

Use Value: Eliminates need for external filtering or software debouncing due to hardware-level noise rejection.

Home Theater System

Air Conditioner Remote

Use Scenario: Multi-device universal remote controlling AV receivers, projectors, and streaming sticks.

IC Role / Device Role / Timing Role: High-immunity IR receiver supporting Mitsubishi and Panasonic protocols with long-burst tolerance.

Use Value: Maintains consistent responsiveness across diverse IR emitters and ambient lighting conditions.

Use Scenario: Battery-powered AC remote operating in hot, humid environments with strong ambient IR.

IC Role / Device Role / Timing Role: Low-quiescent-current IR sensor with −25 °C to +85 °C operational range.

Use Value: Delivers stable performance without thermal drift or false triggers in unconditioned spaces.

Equivalent & Alternatives

The following parts are listed as comparable options for similar IR receiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TSOP39238TR	AGC2 variant - lower noise suppression, higher code compatibility	Better suited for low-noise environments where NEC/RC-5 protocol fidelity is prioritized over lamp immunity	Select TSOP39238TR when ambient IR noise is minimal and maximum protocol compatibility is required
Vishay TSOP4838	Different package (miniature 3-pin SIP), no dual-GND pins, 38 kHz, AGC3-level immunity	Designed for space-constrained PCBs; lacks TVCast's horizontal directivity optimization	Choose TSOP4838 only when board area is critical and ±45° viewing angle is not required

Compared with TSOP39238TR and TSOP4838, the TSOP39438TR delivers superior noise immunity in fluorescent-lit rooms and wider angular coverage, making it the preferred choice for mainstream TV and home theater remotes where reliability under real-world lighting is essential.

Availability

TSOP39438TR is available at Aetrix Electronics and suitable for TV remote controls, set-top box interfaces, home theater systems, and air conditioner remotes requiring stable component supply across high-volume consumer electronics production.

Supply support for TSOP39438TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Intertechnology is a global manufacturer of discrete semiconductors and passive components, specializing in high-reliability optoelectronics, power management, and sensing solutions.

The TSOP394xx series belongs to Vishay's IR receiver module product line, engineered specifically for robust remote control reception in electrically noisy consumer environments using AGC4 architecture and integrated optical filtering.

FAQ

What is the carrier frequency supported by TSOP39438TR?

The TSOP39438TR is factory-tuned to 38 kHz, matching industry-standard NEC, Sharp, and Mitsubishi remote control protocols. This frequency is fixed and non-adjustable; deviation beyond ±5% of 38 kHz will degrade sensitivity and may cause missed commands. The device's bandpass filter and internal PLL ensure optimal response only within this narrow window.

Does TSOP39438TR require an external pull-up resistor on the OUT pin?

Yes, TSOP39438TR has an open-collector output stage and requires an external pull-up resistor (typically 4.7 kΩ to VS) on the OUT pin to generate a valid logic-high level for MCU input. Without it, the output remains floating during inactive periods, risking undefined states and false interrupts in the receiving microcontroller.

Can TSOP39438TR operate reliably under fluorescent lighting?

Yes, TSOP39438TR uses AGC4-level automatic gain control to suppress interference from fluorescent lamps with electronic ballasts, including both low- and high-modulation types shown in Figures 14 and 15 of the datasheet. Its burst-length discrimination and envelope duty cycle validation prevent false triggering even in offices or retail environments with dense fluorescent arrays.

What is the minimum burst length supported by TSOP39438TR?

The TSOP39438TR requires a minimum burst length of 10 cycles at 38 kHz (≈263 µs), and mandates a minimum gap of ≥12 cycles (≈316 µs) between consecutive bursts. These timing constraints are enforced in hardware and must be respected in remote firmware to ensure reliable detection and avoid output blanking.

Is TSOP39438TR qualified for automotive applications?

No, TSOP39438TR has not been qualified to AEC-Q200 or any automotive-grade reliability standards. Vishay explicitly states in the datasheet that these components "have not been qualified to automotive specifications." For automotive infotainment or climate control remotes, designers must select Vishay's automotive-qualified alternatives such as the TFDU series.

TSOP39438TR Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Semiconductor Opto Division

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Sensing Distance:: 45m

B.P.F. Center Frequency:: 38.0kHz

Voltage - Supply:: 2.5 V ~ 5.5 V

Current - Supply:: 450 µA

Orientation:: Top View

Mounting Type:: Through Hole

Operating Temperature:: -

TSOP39438TR FAQ

1.How can I place an order for TSOP39438TR through Aetrix?

Please submit a Request for Quotation (RFQ) for TSOP39438TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TSOP39438TR reliable?

The price and inventory of TSOP39438TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSOP39438TR is usually 5 days.

3.What payment methods are accepted for TSOP39438TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSOP39438TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSOP39438TR?

TSOP39438TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSOP39438TR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TSOP39438TR?

For technical support, including TSOP39438TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSOP39438TR requirements.

6.How does Aetrix verify that TSOP39438TR is sourced from the original manufacturer or authorized distributors?

All TSOP39438TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TSOP39438TR meets industry standards.

7.What is the process for return or replacement of TSOP39438TR?

All TSOP39438TR units undergo pre-shipment inspection (PSI). If there is an issue with TSOP39438TR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TSOP39438TR part is unused and in its original packaging.

Return procedure for TSOP39438TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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