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

Vishay Semiconductor Opto Division TSSP4056

Name: TSSP4056
Brand: Vishay Semiconductor Opto Division
SKU: TSSP4056
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TSSP4056

Manufacturer:: Vishay Semiconductor Opto Division

Category:: Photo Detectors - Remote Receiver

Package:

Datasheet:: TSSP4056.pdf

Description:: SENSOR REMOTE REC 56.0KHZ 2M

Quantity:: RFQ Add To RFQ list

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Inventory:1,995

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Product details

Overview

TSSP4056 from Vishay Semiconductors is an infrared proximity sensor module optimized for fast (~5 ms) reflective sensing at 56 kHz carrier frequency, operating from 2.0 V to 5.5 V supply, delivering active-low output with ±45° directivity and up to 2 m detection range in proximity mode. It integrates bandpass filtering, demodulation, and amplifier stages in a compact 6.0 × 6.95 × 5.6 mm molded package with leaded mounting.

For engineers reviewing the TSSP4056 datasheet, TSSP4056 pinout, TSSP4056 application, or TSSP4056 equivalent, key selection criteria include its 56 kHz carrier frequency match requirement, 0.4–0.7 mW/m² minimum irradiance threshold, 100 mV max low-level output voltage under load, and compatibility with TSAL6200 IR emitters for light barrier configurations up to 12 m.

Technical Context

The TSSP4056 implements a tuned photodiode + transimpedance amplifier + 56 kHz bandpass filter + demodulator + output stage architecture. It rejects ambient light via synchronous detection and delivers clean digital pulses only when modulated 940 nm IR bursts match its center frequency within ±5 % tolerance (Δf_3dB = f₀/10).

Its output remains high during no-signal conditions and transitions low for ≥600 µs upon valid detection, with pulse width tightly correlated to input burst length (t_po = t_pi ± 4/f₀). Response time is specified at ≤5 ms for proximity use cases between 10 cm and 2 m.

Key Specifications

Parameter	Value and Actual Design Meaning
Carrier frequency	56 kHz - must match emitter modulation; enables ambient-light immunity and noise rejection
Supply voltage range	2.0 V to 5.5 V - supports direct interface with 3.3 V and 5 V microcontrollers without level-shifting
Output logic	Active-low open-collector - sinks up to 5 mA; requires external pull-up for logic-high state
Minimum irradiance	0.4 mW/m² (typ.) - defines lowest detectable IR signal intensity under dark ambient conditions
Directivity angle	±45° - determines field-of-view cone for reliable proximity detection without false triggers
Response time	≤5 ms - enables real-time hand/wake-up detection in faucets, dryers, and robotics
Operating temperature	−25 °C to +85 °C - suitable for indoor consumer and industrial environments, not automotive-qualified

Pinout & Package

Package: Molded plastic housing, leaded, dimensions 6.0 mm (W) × 6.95 mm (H) × 5.6 mm (D), with marking area and optical window aligned for front-facing IR reception.

Pin/Terminal	Circuit Role	Design Meaning
1 = OUT	Output signal terminal	Active-low open-collector output; must be pulled up externally to VS or logic rail
2 = GND	Ground reference	Common return path for supply and internal circuitry; requires low-impedance connection
3 = VS	Positive supply input	Accepts 2.0–5.5 V DC; decoupling capacitor recommended near pin for noise immunity

Key Features

Feature	Design Value
Integrated 56 kHz bandpass filter	Rejects sunlight, fluorescent, and LED interference by limiting response to narrow spectral-temporal window
Fast proximity response	≤5 ms detection-to-output latency enables real-time human interaction feedback in consumer devices
Optimized for TSAL6200 emitter	Validated 12 m light barrier performance with 50 mA drive current and matched 940 nm wavelength
Low quiescent current	0.25–0.45 mA typical supply current at 3.3 V enables battery-powered operation in intermittent-sense applications
±45° half-angle directivity	Controls field-of-view to reduce multi-path reflections and improve target localization accuracy

Applications

Automatic Faucet Control	Hand Dryer Activation
Use Scenario: Detects hand presence beneath sink spout to trigger water flow for fixed duration. IC Role / Device Role / Timing Role: Proximity sensor providing active-low "hand detected" signal to microcontroller GPIO. Use Value: Enables touchless hygiene compliance with ≤5 ms response and stable operation under variable ambient lighting.	Use Scenario: Triggers airflow when user places hands below dryer nozzle. IC Role / Device Role / Timing Role: Reflective IR detector generating synchronized low-pulse output on hand entry. Use Value: Delivers reliable activation at 15–30 cm range using integrated 56 kHz demodulation to reject ambient IR noise.
Vending Machine Fall Detection	Toy/Drone Obstacle Avoidance
Use Scenario: Monitors product drop zone to confirm item delivery after selection. IC Role / Device Role / Timing Role: Light barrier receiver paired with TSAL6200 emitter across chute opening. Use Value: Achieves up to 12 m transmission distance with 50 mA emitter drive, ensuring robust detection of falling objects.	Use Scenario: Mounted on drone front panel to sense nearby walls or obstacles during indoor flight. IC Role / Device Role / Timing Role: Fast proximity sensor feeding time-of-flight–adjacent logic for collision warning. Use Value: Provides sub-2 m range detection with <5 ms latency, enabling real-time avoidance decisions in resource-constrained embedded systems.

Automatic Faucet Control

Hand Dryer Activation

Use Scenario: Detects hand presence beneath sink spout to trigger water flow for fixed duration.

IC Role / Device Role / Timing Role: Proximity sensor providing active-low "hand detected" signal to microcontroller GPIO.

Use Value: Enables touchless hygiene compliance with ≤5 ms response and stable operation under variable ambient lighting.

Use Scenario: Triggers airflow when user places hands below dryer nozzle.

IC Role / Device Role / Timing Role: Reflective IR detector generating synchronized low-pulse output on hand entry.

Use Value: Delivers reliable activation at 15–30 cm range using integrated 56 kHz demodulation to reject ambient IR noise.

Vending Machine Fall Detection

Toy/Drone Obstacle Avoidance

Use Scenario: Monitors product drop zone to confirm item delivery after selection.

IC Role / Device Role / Timing Role: Light barrier receiver paired with TSAL6200 emitter across chute opening.

Use Value: Achieves up to 12 m transmission distance with 50 mA emitter drive, ensuring robust detection of falling objects.

Use Scenario: Mounted on drone front panel to sense nearby walls or obstacles during indoor flight.

IC Role / Device Role / Timing Role: Fast proximity sensor feeding time-of-flight–adjacent logic for collision warning.

Use Value: Provides sub-2 m range detection with <5 ms latency, enabling real-time avoidance decisions in resource-constrained embedded systems.

Equivalent & Alternatives

The following parts are listed as comparable options for similar infrared proximity sensing applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TSSP4038	38 kHz carrier frequency; higher ambient light immunity in some indoor settings due to lower frequency	Better suited for long-range light barriers (>10 m) with slower response; not optimized for ≤5 ms proximity	Select when system uses 38 kHz IR emitters or prioritizes cost over speed in non-real-time detection
TSOP38256	Same 56 kHz carrier; smaller 3.5 × 4.5 × 2.5 mm SMD package; no leaded through-hole option	Designed for space-constrained PCB layouts; lacks same mechanical robustness for front-panel mounting	Choose for automated assembly and compact designs where leaded mounting is unnecessary

Compared with TSSP4056, TSSP4038 trades speed for broader ambient immunity at 38 kHz, while TSOP38256 offers identical carrier matching in a miniaturized SMD form-neither is pin-compatible, and both require layout and mechanical redesign for substitution.

Availability

TSSP4056 is available at Aetrix Electronics and suitable for automatic faucets, hand dryers, and vending machine fall detection requiring stable component supply, consistent optical performance, and leaded through-hole mounting compatibility.

Supply support for TSSP4056 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, founded in 1962 and headquartered in Malvern, Pennsylvania.

The TSSP40xx series belongs to Vishay's infrared sensor module product line, engineered specifically for reliable presence, light barrier, and fast proximity sensing in consumer and industrial appliances where ambient-light rejection and timing precision are critical.

FAQ

What is the required carrier frequency for reliable operation of the TSSP4056?

The TSSP4056 requires a 56 kHz modulated infrared signal for detection. Its internal bandpass filter is centered at 56 kHz with a 3 dB bandwidth of ±5.6 kHz (f₀/10). Using an emitter operating outside this range-such as 38 kHz or 40 kHz-will result in severely degraded or no output response. The TSSP4056 datasheet specifies that pulse width tolerance must satisfy t_po = t_pi ± 4/f₀, confirming strict timing alignment with 56 kHz bursts.

Can the TSSP4056 be used in outdoor applications exposed to direct sunlight?

The TSSP4056 is not recommended for direct outdoor sunlight exposure. While it features ambient-light rejection via synchronous demodulation, its maximum specified operating temperature is +85 °C and storage limit is +85 °C. Sunlight-induced housing heating and broadband IR saturation can exceed its 30 W/m² maximum irradiance rating and degrade sensitivity. It is validated for indoor use only-applications like automatic faucets, dryers, and vending machines-where ambient conditions remain controlled.

Does the TSSP4056 require an external pull-up resistor on the OUT pin?

Yes, the TSSP4056 features an open-collector output stage, so an external pull-up resistor is mandatory on pin 1 (OUT). Typical values range from 4.7 kΩ to 10 kΩ, connected to the same supply rail as VS (2.0–5.5 V). Without this resistor, the output cannot achieve a defined high state, resulting in undefined logic levels and unreliable microcontroller interfacing. The datasheet confirms IO = 5 mA sink capability, validating standard TTL/CMOS pull-up design practices.

What is the maximum detection distance achievable with the TSSP4056 in reflective mode?

In reflective (proximity) mode, the TSSP4056 achieves up to 2 m detection range when paired with a suitable 940 nm IR emitter such as the TSAL6200 driven at 50 mA. This range assumes optimal alignment, dark ambient conditions, and proper mechanical housing to prevent crosstalk. The device's ±45° directivity and 0.4–0.7 mW/m² minimum irradiance threshold define usable range boundaries-performance degrades significantly beyond 2 m or under high ambient IR noise.

Is the TSSP4056 qualified for automotive applications?

No, the TSSP4056 is explicitly stated as not qualified to any automotive specification. The Vishay datasheet notes "This component has not been qualified according to automotive specifications," and its operating temperature range (−25 °C to +85 °C) falls short of AEC-Q100 Grade 2 (−40 °C to +105 °C) requirements. It is intended for consumer and industrial appliance use only-such as soap dispensers, security gates, and robotics-not for under-hood or safety-critical vehicle systems.

TSSP4056 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay Semiconductor Opto Division

Series:: -

Packaging:: Tube

Product Status:: Active

Sensing Distance:: 2m

B.P.F. Center Frequency:: 56.0kHz

Voltage - Supply:: 2.5 V ~ 5.5 V

Current - Supply:: 700 µA

Orientation:: Side View

Mounting Type:: PCB, Through Hole

Operating Temperature:: -25°C ~ 85°C

TSSP4056 FAQ

1.How can I place an order for TSSP4056 through Aetrix?

Please submit a Request for Quotation (RFQ) for TSSP4056 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 TSSP4056 reliable?

The price and inventory of TSSP4056 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSSP4056 is usually 5 days.

3.What payment methods are accepted for TSSP4056?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSSP4056 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TSSP4056?

TSSP4056 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TSSP4056 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 TSSP4056?

For technical support, including TSSP4056 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSSP4056 requirements.

6.How does Aetrix verify that TSSP4056 is sourced from the original manufacturer or authorized distributors?

All TSSP4056 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 TSSP4056 meets industry standards.

7.What is the process for return or replacement of TSSP4056?

All TSSP4056 units undergo pre-shipment inspection (PSI). If there is an issue with TSSP4056, 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 TSSP4056 part is unused and in its original packaging.

Return procedure for TSSP4056:

1.Submit a request within 90 days.

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

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