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TIL194X
Isocom Components 2004 LTD
4PIN AC INPUT, SINGLE OPTOCOUPLE
30351 Pcs New Original In Stock
Optoisolator Transistor Output 7.5Vpk 1 Channel 4-DIP
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5.0 / 5.0
- (426 Ratings)
TIL194X
Product Overview
1913273
DiGi Electronics Part Number
TIL194X-DGManufacturer
Isocom Components 2004 LTD
TIL194X
Description
4PIN AC INPUT, SINGLE OPTOCOUPLEInventory
30351 Pcs New Original In Stock
Optoisolator Transistor Output 7.5Vpk 1 Channel 4-DIP
Quantity
Minimum 1
Minimum 1
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TIL194X Technical Specifications
Category
Optoisolators, Transistor, Photovoltaic Output Optoisolators
Packaging
Tube
Series
TIL194
Product Status
Active
Number of Channels
1
Voltage - Isolation
7.5Vpk
Current Transfer Ratio (Min)
20% @ 5mA
Current Transfer Ratio (Max)
-
Turn On / Turn Off Time (Typ)
-
Rise / Fall Time (Typ)
4µs, 3µs
Input Type
AC, DC
Output Type
Transistor
Voltage - Output (Max)
35V
Current - Output / Channel
-
Voltage - Forward (Vf) (Typ)
1.2V
Current - DC Forward (If) (Max)
50 mA
Vce Saturation (Max)
400mV
Operating Temperature
-30°C ~ 100°C
Mounting Type
Through Hole
Package / Case
4-DIP (0.300", 7.62mm)
Supplier Device Package
4-DIP
Datasheet & Documents
Datasheets
Download TIL194X Product Specification (PDF)
HTML Datasheet
TIL194X-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.49.8000
Additional Information
Other Names
56-TIL194X-DG
56-TIL194X
58-TIL194X
Standard Package
100
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
The high standards maintained by DiGi Electronics ensure consistent product performance.
Dec 02, 2025
Shipment was prompt, and I appreciated the efficient customer support team.
Dec 02, 2025
Choosing DiGi means opting for sustainability, quality, and affordability.
Dec 02, 2025
The protective packaging gives us confidence in their products.
Dec 02, 2025
The team handled my requests with professionalism, making shopping easy.
Dec 02, 2025
Every visit to DiGi Electronics feels like a personalized experience thanks to their friendly staff.
Dec 02, 2025
Price transparency allows us to plan our expenses with confidence.
Dec 02, 2025
DiGi Electronics' professional support has helped me achieve my project goals smoothly.
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Frequently Asked Questions (FAQ)
Can the TIL194X be reliably used in high-temperature industrial environments where ambient temperatures approach 100°C, and what design considerations should I account for to ensure stable current transfer ratio (CTR)?
Yes, the TIL194X is rated for operation up to 100°C, making it suitable for high-temperature industrial applications. However, CTR typically degrades with rising temperature, and since the TIL194X has a minimum CTR of 20% at 5mA, you should derate the drive current or add margin in your feedback design—especially in long-life systems. To maintain reliability, use a higher input current (e.g., 8–10mA within the 50mA max limit) to compensate for aging and temperature effects, and avoid sustained operation at maximum junction temperature to extend optocoupler lifespan.
How does the AC input capability of the TIL194X compare to DC-only optocouplers like the PC817, and what circuit modifications are needed when replacing a PC817 with the TIL194X in a flyback converter feedback loop?
The TIL194X supports both AC and DC inputs, unlike the PC817 which is DC-only, giving it more flexibility in zero-crossing detection or bidirectional triggering circuits. When replacing a PC817 with the TIL194X, ensure that the input drive circuit can handle the AC polarity—no additional components are typically required due to its internal bidirectional LED structure. However, verify that your controller provides sufficient peak current (≥5mA) during both half-cycles to maintain the required CTR. Also, confirm that input voltage spikes stay below the 50mA max forward current using appropriate series resistance.
What are the risks of using the TIL194X in a solid-state relay (SSR) gate drive circuit without additional current limiting, and how should I calculate the series resistor to prevent LED degradation?
Operating the TIL194X without a properly sized series resistor risks exceeding the 50mA DC forward current limit, leading to LED overheating and premature failure. To calculate the resistor: subtract the TIL194X’s typical Vf (1.2V) from your drive voltage, then divide by your desired If (e.g., 10mA for reliable switching with margin). For a 5V system: R = (5V - 1.2V) / 0.01A = 380Ω (use 390Ω standard value). This ensures reliable switching while minimizing thermal stress, especially in continuous-duty applications.
Is the 7.5kVpk isolation rating of the TIL194X sufficient for reinforced insulation in medical or industrial 240VAC mains monitoring circuits, and what layout practices should I follow to maintain this isolation?
The TIL194X’s 7.5kVpk isolation voltage meets functional and basic insulation requirements, but for reinforced insulation in 240VAC systems (per IEC 60601 or IEC 61010), additional system-level safeguards are required. The optoisolator alone may not suffice—ensure creepage and clearance distances on the PCB exceed 8mm (ideally 10mm) between input and output traces, avoid conductive coatings, and use a split ground plane. Also, verify that your enclosure prevents user access to high-voltage sides. The TIL194X can contribute to a compliant design, but final certification depends on full system implementation.
What are the trade-offs when using the TIL194X instead of a faster optocoupler like the 6N137 in digital signal isolation, and how does its 4µs rise time impact performance in PWM control applications?
The TIL194X has a relatively slow 4µs rise time and lacks a built-in signal conditioning IC, unlike the 6N137 which supports up to 10 Mbps. This limits the TIL194X to PWM frequencies below ~25kHz, making it less suitable for high-speed digital isolation. In motor control or switch-mode power supplies requiring precise timing, this delay can introduce phase error or distortion. If you’re using the TIL194X for PWM feedback, implement hysteresis or filtering in the receiving stage to mitigate jitter, and avoid edge-dependent timing loops. Use the 6N137 or a digital isolator for high-bandwidth needs; reserve the TIL194X for lower-speed analog or on/off control where cost and AC input capability are advantageous.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
TIL194X CAD Models
Isocom Components 2004 LTD TIL194X PCB symbols & footprints
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