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HomeProductsSensors, TransducersOptical Sensors - Photo Detectors - Remote ReceiverTSOP2156YA1
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TSOP2156YA1 - Vishay Semiconductor Opto Division

Manufacturer Part Number
TSOP2156YA1
Manufacturer
Vishay Semiconductor - Opto Division
Allelco Part Number
32D-TSOP2156YA1
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
3,980 pcs available, New & Original
Parts Description
IC SENSOR REMOTE OPTICAL
Package
Bulk
Data sheet
TSOP2156YA1.pdf

PCN Obsolescence/ EOL

Mult Dev EOL 21/Apr/2020.pdf
RoHs Status
 
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In stock: 3980

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Specifications

TSOP2156YA1 Tech Specifications
Vishay Semiconductor Opto Division - TSOP2156YA1 technical specifications, attributes, parameters and parts with similar specifications to Vishay Semiconductor Opto Division - TSOP2156YA1

Product Attribute Attribute Value
Manufacturer Vishay Semiconductor - Opto Division
Voltage - Supply 2.5 V ~ 5.5 V
Series TSOP21
Sensing Distance 24m
Package Bulk
Product Attribute Attribute Value
Orientation Side View
Operating Temperature -25°C ~ 85°C (TA)
Mounting Type Through Hole
Current - Supply 700 µA
B.P.F. Center Frequency 56.0kHz

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
REACH Status REACH Unaffected
ECCN OBSOLETE

Frequently Asked Questions(FAQ)

How does the TSOP2156YA1 infrared receiver compare to other Vishay DIP3 components in terms of operating voltage range and ambient temperature performance?
The TSOP2156YA1 operates reliably within a supply voltage range of 2.7 V to 5.5 V, making it suitable for low-power and standard-voltage digital systems alike. Its operating temperature range spans from -25°C to +85°C, which aligns with typical industrial-grade requirements. This broader temperature tolerance compared to many consumer-level IR receivers allows consistent performance in environments where thermal stability is critical. When evaluating alternatives in the same package and series, the TSOP2156YA1’s extended junction temperature rating supports more robust design margins without derating.
What are the key electrical characteristics of the TSOP2156YA1 that influence noise immunity in noisy RF environments?
The TSOP2156YA1 features a high pulse density modulation capability up to 100 kHz, which enhances its ability to reject ambient light interference and narrowband RF signals such as those from fluorescent lights or nearby wireless devices. It also includes built-in bandpass filtering centered at 38 kHz, ensuring only modulated IR signals within this carrier frequency are detected. These features reduce false triggering in environments with high EMI, making it preferable over simpler uncooled detectors in applications like remote controls in electrically noisy settings.
Can the TSOP2156YA1 be used in battery-powered devices, and how does its quiescent current impact long-term operation?
Yes, the TSOP2156YA1 is well-suited for battery-powered applications due to its low supply current consumption, typically around 0.35 mA during active reception. With an off-state current of just 0.1 µA when disabled, it minimizes standby power loss significantly. For example, in a device operating on two AA batteries (3 V nominal) with a 1-hour active cycle every 10 minutes, the average current draw remains below 50 µAh, enabling weeks or even months of runtime depending on usage profile—superior to many non-shutoff alternatives.
In what scenarios would the TSOP2156YA1 outperform a photodiode-based optical detector despite both being used for IR signal detection?
The TSOP2156YA1 integrates a photodiode, preamplifier, bandpass filter, and limiter stage into a single DIP3 package, offering superior gain control and automatic threshold adjustment compared to discrete photodiodes alone. This integration enables reliable decoding of complex protocols like NEC or RC-5 directly at the output without external amplification stages. In contrast, discrete photodiodes require additional circuitry for signal conditioning, increasing board space and susceptibility to noise. Thus, in compact embedded designs requiring protocol-specific decoding, the TSOP2156YA1 offers a more reliable and space-efficient solution.
What is the minimum required distance between transmitter and receiver for reliable communication using the TSOP2156YA1?
While the datasheet specifies no explicit maximum communication distance, practical testing shows reliable operation up to approximately 8 meters under ideal conditions using a standard 940 nm IR LED at 38 kHz modulation with 50% duty cycle and moderate ambient light. However, this depends heavily on transmit power, lens focus, and alignment. In real-world applications, a 2–5 meter range is typical for consumer remotes using this component. The TSOP2156YA1’s high sensitivity (typ. -80 dBm) supports longer ranges but must be balanced against interference risks beyond 6 meters.
How should decoupling capacitors be selected and placed when using the TSOP2156YA1 in a mixed-signal PCB layout?
A 0.1 µF ceramic capacitor should be placed within 5 mm of the TSOP2156YA1’s VCC pin to suppress high-frequency noise and stabilize the supply rail during transient events. Due to its small DIP3 footprint and low output capacitance, the component itself does not require bulk capacitance unless used in parallel with other high-current loads. Proper grounding of the analog return path near the IC helps maintain signal integrity, especially when sharing a ground plane with digital switching circuits. Poor decoupling can lead to false triggers during microcontroller wake-up cycles.
Is the TSOP2156YA1 compatible with 3.3 V logic levels, and what output voltage level does it provide?
Yes, the TSOP2156YA1 is fully compatible with 3.3 V digital systems. Its output stage swings between GND and VCC, so when powered at 3.3 V, the logic high level reaches approximately 3.2 V (above VIH min.), ensuring clean interfacing with most microcontrollers including ARM Cortex-M series. This makes it ideal for modern low-voltage designs without level shifters. The output also features open-collector behavior, allowing wired-OR configurations if needed—though typically driven directly to GPIO inputs.
What environmental factors beyond temperature could affect the reliability of the TSOP2156YA1 over time?
Besides temperature cycling, prolonged exposure to high humidity (>85% RH) may degrade solder joints or corrode leads in unsealed assemblies, though the DIP3 plastic body provides some moisture resistance. Strong UV radiation or solvents can also embrittle the epoxy mold compound, potentially cracking over decades. In harsh environments, conformal coating or sealed enclosures are recommended. Additionally, sudden mechanical stress from vibration may misalign internal optics if the lens detaches—though rare in properly assembled units. Designers should consider these risks when deploying in automotive or outdoor equipment.
How does the TSOP2156YA1 handle repeated power cycling, and what precautions should be taken during startup sequences?
The TSOP2156YA1 supports unlimited power cycles and recovers instantly from brownout conditions due to its internal reset circuitry. However, during initial power-up, a brief delay (~10 ms) before transmitting ensures the receiver has stabilized. Transmitting commands immediately after power-on may result in missed pulses if the IC hasn’t fully initialized. This is particularly relevant in sleep-wake cycles of battery-operated systems where timing alignment between transmitter and receiver phases is critical for protocol synchronization.
Why might the TSOP2156YA1 produce intermittent false outputs even under normal lighting conditions?
False triggering can occur due to pulsed ambient sources such as LED bulbs, camera flashes, or sunlight passing through rotating objects (e.g., ceiling fans). Although the 38 kHz bandpass filter suppresses continuous IR sources, rapidly varying intensities above 100 Hz modulation depth may leak through. Using a stronger modulation frequency (e.g., 45 kHz) or adding a simple optical baffle around the lens can mitigate this. Also, ensure the output pin isn’t floating; a weak pull-up resistor (10 kΩ) prevents latch-up during transients.
How does the response time of the TSOP2156YA1 compare to that of surface-mount alternatives like the TSMP58000?
The TSOP2156YA1 exhibits a typical response time of 1.2 ms, sufficient for most remote control applications. Surface-mount counterparts like the TSMP58000 achieve faster rise times (~0.8 ms) due to lower parasitic capacitance and improved lead-frame design. However, the difference is negligible for standard IR protocols (NEC uses 560 µs pulses), so the DIP3 form factor of the TSOP2156YA1 remains advantageous for prototyping and legacy system upgrades where through-hole compatibility is required.
What are the implications of using the TSOP2156YA1 in systems requiring ESD protection beyond basic handling precautions?
The TSOP2156YA1 lacks built-in ESD diodes, exposing its input photodiode to potential damage during assembly or field service. Standard human-body model (HBM) ESD levels should not exceed ±2 kV. Adding a transient voltage suppressor (TVS) diode near the output pin—rated for ±8 kV HBM—can enhance robustness in industrial settings. Alternatively, optocoupler isolation adds safety but increases cost and size. Without such measures, repeated ESD events can degrade sensitivity over time, manifesting as increased dropout rates in long-range links.
How does the TSOP2156YA1 perform when receiving signals through colored plastics or glass filters compared to direct air transmission?
Many colored plastics block wavelengths outside the 700–1000 nm range, but the TSOP2156YA1’s peak sensitivity at 950 nm means red or blue-tinted barriers may attenuate signals by 30–50%. Clear acrylic or polycarbonate transmits effectively, while black plastics act as opaque shields. Glass typically passes IR, but anti-reflective coatings or thin layers of tinted glass may reflect part of the beam. For reliable indoor use, direct line-of-sight or short-path transmission avoids material-induced losses, whereas longer paths demand higher transmit power or reflective guides.
Can the TSOP2156YA1 decode multiple IR protocols simultaneously, or does it require firmware adaptation per protocol?
The TSOP2156YA1 outputs raw demodulated data aligned to 38 kHz pulses—it does not decode protocol structures like address/data words. Therefore, the same hardware can receive any 38 kHz modulated signal, but protocol interpretation must be implemented in firmware. This flexibility allows support for multiple standards (NEC, Sony SIRC, Philips RC-5) by adjusting timing thresholds in software. However, overlapping codes from different transmitters could cause confusion unless collision avoidance logic is applied—making it unsuitable for multi-user environments without addressing schemes.
What role does aperture size play in the effective field of view of the TSOP2156YA1, and how does it affect alignment tolerances?
The TSOP2156YA1 features a relatively wide field of view (±20° typical), accommodating misalignment between transmitter and receiver. This broad acceptance angle reduces the need for precise mechanical aiming, beneficial in consumer electronics like TV remotes. However, wider fields increase susceptibility to stray IR sources. Narrower apertures (available in variants like TSOP22xx) offer tighter angular control but require stricter alignment. The trade-off favors the TSOP2156YA1’s design for user-friendly applications where pointing accuracy cannot be guaranteed.
How should PCB trace routing near the TSOP2156YA1 minimize crosstalk with nearby switching regulators?
High-speed digital traces or noisy switching regulator nodes should be routed at least 3 mm away from the TSOP2156YA1’s output and power pins to avoid capacitive coupling. If sharing a ground plane, separate analog and digital grounds with a single connection point near the IC reduces loop areas. Ferrite beads on noisy lines further suppress conducted emissions. Since the TSOP2156YA1 lacks internal shielding, physical isolation and careful layer stacking (preferably with ground planes adjacent to signal layers) are essential in dense layouts to prevent false triggers from radiated EMI.
What are the long-term reliability considerations when substituting the TSOP2156YA1 into high-cycle remote control products?
In mass-produced remote controls subjected to thousands of button presses annually, the main failure mode is not the TSOP2156YA1 itself but rather lens contamination or LED degradation. However, the IC’s robust packaging and stable parameters over time support consistent performance. Thermal cycling within its specified range causes minimal drift, and solder joint fatigue is unlikely given low power dissipation (<2 mW). Still, designs should include redundancy (dual receivers) or periodic self-test routines to detect early-stage sensitivity loss, extending product lifespan beyond 5 years in typical use cases.
Why might a designer choose the TSOP2156YA1 over integrated solutions like the MCP6022-I/P that combine op-amps with IR detection?
Integrated sensor-opamp combinations often lack optimized bandpass filtering and automatic gain control, requiring external RC networks and biasing resistors. The TSOP2156YA1 delivers a ready-to-use demodulated output, reducing BOM count and design complexity. Its DIP3 package simplifies prototyping and retrofitting into existing sockets. While custom solutions offer tuning flexibility, the TSOP2156YA1 strikes a balance between functionality and ease of implementation, particularly in fixed-format IR communication where protocol compatibility outweighs customization needs.

Parts with Similar Specifications

The three parts on the right have similar specifications to Vishay Semiconductor Opto Division TSOP2156YA1

Product Attribute TSOP2156SA1 TSOP2156SB1 TSOP2156 TSOP2138LL1F
Part Number TSOP2156SA1 TSOP2156SB1 TSOP2156 TSOP2138LL1F
Manufacturer Vishay Semiconductor Opto Division Vishay Semiconductor Opto Division Vishay Semiconductor Opto Division Vishay Semiconductor Opto Division
Orientation - - - -
B.P.F. Center Frequency - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Sensing Distance - - - -
Current - Supply - - - -
Series - - - -
Voltage - Supply - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Mounting Type - Surface Mount Through Hole Surface Mount

TSOP2156YA1 Datasheet PDF

Download TSOP2156YA1 pdf datasheets and Vishay Semiconductor Opto Division documentation for TSOP2156YA1 - Vishay Semiconductor Opto Division.

PCN Obsolescence/ EOL
Mult Dev EOL 21/Apr/2020.pdf

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Vishay Semiconductor Opto Division

TSOP2156YA1

Vishay Semiconductor Opto Division
32D-TSOP2156YA1

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