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

Vishay Semiconductor Opto Division TSOP77338TT

Name: TSOP77338TT
Brand: Vishay Semiconductor Opto Division
SKU: TSOP77338TT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSOP77338TT

Manufacturer:: Vishay Semiconductor Opto Division

Category:: Photo Detectors - Remote Receiver

Package:

Datasheet:: TSOP77338TT.pdf

Description:: SENSOR REMOTE REC 38.0KHZ 40M

Quantity:: RFQ Add To RFQ list

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Inventory:2,884

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Product details

Overview

TSOP77338TT from Vishay Semiconductors is a 38 kHz infrared (IR) receiver module optimized for short-burst remote control systems in noisy environments, featuring AGC5 configuration for enhanced noise immunity against fluorescent lamps, LCD TVs, and Wi-Fi interference. It integrates a PIN photodiode and preamplifier in a single Heimdall SMD package, operates from 2.0 V to 5.5 V, draws only 0.35 mA typical supply current at 3.3 V, and delivers active-low demodulated output directly compatible with microcontroller input pins for RECS-80/XMP code decoding.

For engineers reviewing the TSOP77338TT datasheet, TSOP77338TT pinout, TSOP77338TT application, or TSOP77338TT equivalent, key selection criteria include carrier frequency match (38 kHz), AGC level (AGC5 for high-noise suppression), optical directivity (±50° horizontal), minimum irradiance threshold (0.3 mW/m² for XMP code), and compatibility with TSAL6200 IR emitters at up to 18 m transmission distance.

Technical Context

The TSOP77338TT employs a band-pass filter centered at 38 kHz with ±5% tolerance and 3.8 kHz bandwidth (Δf_3dB = f₀/10), enabling precise carrier discrimination. Its AGC5 architecture dynamically adjusts gain to suppress continuous or modulated ambient IR noise while maintaining sensitivity to valid RC5/XMP bursts.

Burst detection logic requires ≥6 cycles per burst and enforces gap timing rules (6–40 cycles between bursts); it rejects DC light, 2.4/5 GHz Wi-Fi harmonics, and complex fluorescent lamp disturbance patterns (e.g., Fig. 14/15), delivering clean active-low output pulses with <100 mV low-level voltage under load.

Key Specifications

Parameter	Value and Actual Design Meaning
Carrier frequency	38 kHz - precisely tuned for RECS-80 and XMP remote protocols
Supply voltage	2.0 V to 5.5 V - supports direct interface with 3.3 V and 5 V microcontrollers
Supply current	0.35 mA typ. at 3.3 V - enables low-power battery-operated remote receivers
Output type	Active-low open-collector - sinks up to 5 mA, compatible with standard MCU GPIO pull-up
Minimum irradiance	0.3 mW/m² for XMP code - ensures reliable reception under low-signal conditions
Directivity	±50° horizontal half-angle - provides wide field-of-view for user-friendly pointing
Operating temp.	−25 °C to +85 °C - suitable for consumer electronics and industrial indoor environments
Package	Heimdall SMD - 6.8 mm × 3.0 mm × 3.2 mm footprint, reflow-compatible

Pinout & Package

TSOP77338TT uses a 4-pin Heimdall surface-mount package (6.8 mm × 3.0 mm × 3.2 mm) with gull-wing leads, optimized for automated assembly and IR-filtered epoxy encapsulation. Pin 1 and Pin 4 are ground terminals; Pin 2 is supply voltage (VS); Pin 3 is active-low demodulated output (OUT).

Pin/Terminal	Circuit Role	Design Meaning
1, 4	GND	Dual ground connections reduce impedance and improve noise rejection in high-frequency IR reception
2	VS	Power input pin accepting 2.0–5.5 V DC; internal regulation enables stable operation across supply ripple
3	OUT	Active-low open-collector output; requires external pull-up resistor to VS for MCU interfacing

Key Features

Feature	Design Value
AGC5 noise suppression	Optimized for very noisy environments (e.g., near dimmed LCDs), rejecting fluorescent lamp modulation without sacrificing XMP/RECS-80 code fidelity
Integrated IR filter	Epoxy-molded 950 nm bandpass filter blocks visible light and ambient IR, eliminating need for external optics
Low supply current	0.35 mA typical at 3.3 V enables >1-year battery life in TV remote receivers using CR2032 cells
Short-burst optimization	Validates bursts as short as 6 cycles at 38 kHz and enforces strict gap timing to reject spurious noise pulses
Wide supply range	2.0–5.5 V operation allows direct use with legacy 5 V and modern 3.3 V embedded systems without level-shifting

Applications

TV Remote Control Receiver	Set-Top Box IR Interface
Use Scenario: Consumer television remote control unit receiving commands in living room environments with ambient IR noise from LED/LCD displays and Wi-Fi routers. IC Role / Device Role / Timing Role: Demodulates 38 kHz modulated IR carrier from TSAL6200 emitter, filters ambient noise via AGC5, and outputs clean active-low digital pulses to host MCU. Use Value: Enables reliable command decoding at up to 18 m range while rejecting interference from nearby 5 GHz Wi-Fi signals and fluorescent lighting.	Use Scenario: Set-top box front-panel IR receiver operating in entertainment cabinets with limited ventilation and proximity to heat-generating components. IC Role / Device Role / Timing Role: Provides robust 38 kHz IR signal acquisition with −25 °C to +85 °C operating range and low 0.35 mA quiescent current to minimize thermal load. Use Value: Maintains consistent sensitivity across temperature swings and eliminates false triggers caused by cabinet-reflected IR or power supply ripple.
Smart Home Hub IR Gateway	Audio System Remote Interface
Use Scenario: Central smart home hub aggregating IR commands from multiple legacy AV devices in mixed-lighting environments (sunlight + LED bulbs). IC Role / Device Role / Timing Role: Acts as protocol-agnostic IR front-end, supporting XMP and RECS-80 codes with adaptive AGC to handle variable ambient irradiance up to 40 klx. Use Value: Delivers <0.4 mW/m² minimum irradiance threshold for XMP, ensuring capture of weak or off-axis remote signals without manual alignment.	Use Scenario: High-fidelity audio receiver with IR remote interface located near speakers emitting mechanical vibration and electromagnetic fields. IC Role / Device Role / Timing Role: Performs carrier-selective demodulation at 38 kHz and envelope duty-cycle validation to reject EMI-induced false triggers. Use Value: Achieves >60 dB noise rejection margin against speaker-induced 30–300 Hz mechanical coupling and 2.4 GHz RF leakage.

TV Remote Control Receiver

Set-Top Box IR Interface

Use Scenario: Consumer television remote control unit receiving commands in living room environments with ambient IR noise from LED/LCD displays and Wi-Fi routers.

IC Role / Device Role / Timing Role: Demodulates 38 kHz modulated IR carrier from TSAL6200 emitter, filters ambient noise via AGC5, and outputs clean active-low digital pulses to host MCU.

Use Value: Enables reliable command decoding at up to 18 m range while rejecting interference from nearby 5 GHz Wi-Fi signals and fluorescent lighting.

Use Scenario: Set-top box front-panel IR receiver operating in entertainment cabinets with limited ventilation and proximity to heat-generating components.

IC Role / Device Role / Timing Role: Provides robust 38 kHz IR signal acquisition with −25 °C to +85 °C operating range and low 0.35 mA quiescent current to minimize thermal load.

Use Value: Maintains consistent sensitivity across temperature swings and eliminates false triggers caused by cabinet-reflected IR or power supply ripple.

Smart Home Hub IR Gateway

Audio System Remote Interface

Use Scenario: Central smart home hub aggregating IR commands from multiple legacy AV devices in mixed-lighting environments (sunlight + LED bulbs).

IC Role / Device Role / Timing Role: Acts as protocol-agnostic IR front-end, supporting XMP and RECS-80 codes with adaptive AGC to handle variable ambient irradiance up to 40 klx.

Use Value: Delivers <0.4 mW/m² minimum irradiance threshold for XMP, ensuring capture of weak or off-axis remote signals without manual alignment.

Use Scenario: High-fidelity audio receiver with IR remote interface located near speakers emitting mechanical vibration and electromagnetic fields.

IC Role / Device Role / Timing Role: Performs carrier-selective demodulation at 38 kHz and envelope duty-cycle validation to reject EMI-induced false triggers.

Use Value: Achieves >60 dB noise rejection margin against speaker-induced 30–300 Hz mechanical coupling and 2.4 GHz RF leakage.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TSOP77538	Same 38 kHz carrier and AGC5, but uses larger TSOP-6 package (7.6 mm × 4.0 mm) with different pinout (1=GND, 2=VS, 3=OUT, 4=NC, 5=GND, 6=NC)	Requires PCB layout change due to larger footprint and non-identical pin assignment; suited for designs needing higher mechanical robustness	Select TSOP77538 only if board space permits larger package and NC pins can be accommodated
Vishay TSOP38238	38 kHz receiver with AGC3 (lower noise suppression), 0.4 mA supply current, and ±45° directivity; lacks XMP-optimized sensitivity spec	Less effective in very noisy environments (e.g., near dimmed LCDs); lower maximum transmission distance (15 m vs. 18 m)	Choose TSOP38238 for cost-sensitive, low-noise applications where AGC5-level immunity is unnecessary

Compared with TSOP77538, TSOP77338TT offers identical electrical performance in a smaller Heimdall package with gull-wing leads for finer-pitch SMT assembly; versus TSOP38238, it delivers superior noise immunity and extended range via AGC5 tuning and optimized XMP sensitivity, making it the preferred choice for demanding consumer remote systems.

Availability

TSOP77338TT is available at Aetrix Electronics and suitable for TV remote control receivers, set-top box IR interfaces, smart home hub gateways, and audio system remote interfaces requiring stable component supply across high-volume consumer electronics production.

Supply support for TSOP77338TT 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 Semiconductors is a global leader in discrete semiconductors and passive components, specializing in high-reliability optoelectronics, power management, and sensing solutions for industrial and consumer markets.

The TSOP773xx series belongs to Vishay's IR receiver module product line, engineered specifically for short-burst remote control systems in electrically noisy environments-emphasizing AGC-configurable noise immunity, wide supply range, and direct microcontroller interoperability.

FAQ

What is the carrier frequency supported by TSOP77338TT?

The TSOP77338TT is factory-tuned to a nominal carrier frequency of 38 kHz with ±5% tolerance, matching industry-standard RECS-80 and XMP remote control protocols. This frequency is fixed per device variant and cannot be adjusted externally; the "38" in the part number explicitly denotes this 38 kHz center frequency.

Does TSOP77338TT require an external pull-up resistor on the OUT pin?

Yes, TSOP77338TT features an open-collector active-low output (Pin 3), requiring an external pull-up resistor to VS (typically 4.7 kΩ–10 kΩ) to establish a defined logic-high level when no IR signal is present. Without this resistor, the output remains floating and cannot drive a microcontroller input reliably.

What is the maximum transmission distance achievable with TSOP77338TT?

Under test conditions using a TSAL6200 IR emitter at 50 mA forward current and RECS-80 optical test signal, TSOP77338TT achieves a typical transmission distance of 18 meters in dark ambient conditions. Real-world range depends on emitter power, lens quality, ambient IR noise, and physical alignment.

Can TSOP77338TT operate from a 2.0 V supply?

Yes, TSOP77338TT is fully specified to operate across 2.0 V to 5.5 V supply voltage. At 2.0 V, supply current drops to approximately 0.25 mA (typ.), and output low voltage remains ≤100 mV with 0.5 mA sink current-enabling compatibility with ultra-low-voltage battery-powered remote receivers.

Is TSOP77338TT qualified for automotive applications?

No, TSOP77338TT has not been qualified to AEC-Q200 or other automotive reliability standards. Its operating temperature range is −25 °C to +85 °C, and it lacks automotive-grade qualification documentation. For automotive infotainment IR receivers, Vishay recommends consulting their dedicated automotive-qualified IR module portfolio.

TSOP77338TT Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Semiconductor Opto Division

Series:: TSOP773

Packaging:: Tape & Reel (TR)

Product Status:: Active

Sensing Distance:: 40m

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

Voltage - Supply:: 2.5 V ~ 5.5 V

Current - Supply:: 700 µA

Orientation:: Top View

Mounting Type:: Surface Mount

Operating Temperature:: -25°C ~ 85°C

TSOP77338TT FAQ

1.How can I place an order for TSOP77338TT through Aetrix?

Please submit a Request for Quotation (RFQ) for TSOP77338TT 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 TSOP77338TT reliable?

The price and inventory of TSOP77338TT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSOP77338TT is usually 5 days.

3.What payment methods are accepted for TSOP77338TT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSOP77338TT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSOP77338TT?

TSOP77338TT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSOP77338TT 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 TSOP77338TT?

For technical support, including TSOP77338TT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSOP77338TT requirements.

6.How does Aetrix verify that TSOP77338TT is sourced from the original manufacturer or authorized distributors?

All TSOP77338TT 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 TSOP77338TT meets industry standards.

7.What is the process for return or replacement of TSOP77338TT?

All TSOP77338TT units undergo pre-shipment inspection (PSI). If there is an issue with TSOP77338TT, 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 TSOP77338TT part is unused and in its original packaging.

Return procedure for TSOP77338TT:

1.Submit a request within 90 days.

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

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