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Infineon Technologies TCA355GHLLA1
- Part No.:
- TCA355GHLLA1
- Manufacturer:
- Infineon Technologies
- Category:
- Sensor, Capacitive Touch
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TCA355GHLLA1.pdf
- Description:
- IC PROXIMITY SWITCH 8DSO
- Quantity:
- Payment:
- Shipping:
Inventory:3,096
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Product details
Overview
TCA355GHLLA1 from Infineon Technologies is a bipolar monolithic inductive proximity switch IC designed for metal detection in industrial sensors. It integrates oscillator, amplitude detector, hysteresis comparator, and push-pull output stages; features 0.6 mA open-loop current consumption (IS), 0.04 V L-output saturation at 5 mA, and operates from 5–30 V supply across –25 °C to +85 °C ambient. Used in flush-mounted inductive sensors with ferrite pot cores and external LC resonant circuits.
For engineers reviewing the TCA355GHLLA1 datasheet, TCA355GHLLA1 pinout, TCA355GHLLA1 application, or TCA355GHLLA1 equivalent, key selection criteria include turn-on delay configurability via external resistor, temperature-stable switching hysteresis (±0.5 V), integrated short-circuit protection (~10 s), and compatibility with low-Q coils enabled by higher sensitivity.
Technical Context
The TCA355GHLLA1 implements a self-oscillating LC detector architecture where coil damping modulates oscillator amplitude, triggering a comparator with fixed hysteresis. Its internal reference voltage (VREF ≈ 2.1 V) remains stable over supply and temperature, enabling consistent thresholding without external regulation.
Unlike the TCA305, the TCA355 omits the internal integrating capacitor-requiring external CI/RI at Pin 3 for noise immunity-and supports higher oscillator frequencies (up to 1.5 MHz). Output enable is tied to VS stabilization above ~5 V, with automatic disable below ~4.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 5 V to 30 V - supports wide industrial rail; operation down to ~2.5 V possible only with VREF tied to VS (loss of internal regulation) |
| Open-loop current (IS) | 0.6 mA typ. - enables ultra-low-power sensor standby modes without external sleep control |
| L-output saturation voltage | 0.04 V at 5 mA - minimizes power loss and heat in high-duty-cycle switching applications |
| Oscillator frequency range | 15 kHz to 1.5 MHz - accommodates diverse coil geometries (e.g., 115–350 kHz typical for M12/M18 flush sensors) |
| Switching hysteresis | ±0.5 V - ensures stable on/off transitions independent of temperature, supply drift, or target distance variation |
| Turn-on delay control | Configurable via external resistor to Pin 1 - allows precise timing alignment in synchronized multi-sensor systems |
| Short-circuit output protection | ~10 s to 1 min - provides robust fault tolerance during mechanical jamming or wiring faults |
Pinout & Package
PG-DSO-8-1 (8-pin SOIC, surface-mount, RoHS-compliant lead plating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Turn-on delay control | External resistor to VS sets RC time constant for controlled startup delay; open = no delay |
| 2 | GND | Power ground reference for oscillator, comparator, and outputs |
| 3 | Integrating capacitance input | Accepts external CI (e.g., 1 nF) or RI-CI network for noise filtering and stability |
| 4 | VREF | Internally regulated 2.1 V reference; must be connected to VS if operating below 5 V |
| 5 | VS | Main supply input (5–30 V); powers all internal blocks and enables outputs above ~5 V |
| 6 | Q (output) | Inverting push-pull output - sinks up to 50 mA, sources 10 µA; active-low logic |
| 7 | NC | No connection - internally unconnected; must remain floating |
| 8 | OSC | Oscillator node - connects directly to external LC resonant circuit (coil + capacitor) |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-stable hysteresis | Hysteresis remains ±0.5 V across –25 °C to +85 °C and full supply range - eliminates recalibration in varying environments |
| High sensitivity detection | Enables larger switching distances (e.g., 4–15 mm for M12–M30 housings) and permits use of lower-Q, cost-optimized coils |
| Low saturation output | 0.04 V drop at 5 mA load - reduces thermal stress and improves efficiency in battery-powered or thermally constrained sensors |
| Integrated short-circuit protection | Automatic output disable for ~10 s under sustained short - prevents latch-up and enables self-recovery without system reset |
| External turn-on delay | Precision startup timing via resistor on Pin 1 - supports synchronization in multi-channel industrial PLC inputs |
Applications
| Factory Automation Sensor | Hydraulic Cylinder Position Sensing |
|---|---|
Use Scenario: Detecting presence of steel pistons inside stainless-steel hydraulic cylinders without physical contact. IC Role / Device Role / Timing Role: Proximity switch IC generating clean digital output upon piston approach; oscillator frequency set to 280 kHz using N22 core and 1.2 nF capacitor. Use Value: Enables maintenance-free position feedback with 8 mm sensing range and immunity to oil mist and vibration due to fixed hysteresis and short-circuit tolerance. | Use Scenario: End-of-stroke detection in CNC machine tool clamping units with compact M12 housing. IC Role / Device Role / Timing Role: Core signal conditioning IC driving push-pull output stage; configured with 100 nF CD and 8.2 kΩ RA for CENELEC-compliant flush mounting. Use Value: Delivers 4 mm reliable switching distance with <0.1 V output drop, reducing heat buildup in sealed enclosures. |
| Conveyor Belt Object Counting | Rotary Encoder Index Detection |
Use Scenario: Counting metal parts passing under an M18 inductive sensor mounted above a high-speed conveyor. IC Role / Device Role / Timing Role: High-frequency oscillator (350 kHz) and fast comparator detecting rapid coil damping events; turn-on delay disabled for minimal latency. Use Value: Supports >5 kHz switching rate with stable hysteresis, eliminating false counts caused by thermal drift or supply ripple. | Use Scenario: Detecting index pulse from ferrous gear tooth on motor shaft in servo drive feedback loop. IC Role / Device Role / Timing Role: Low-jitter proximity interface converting mechanical rotation into TTL-compatible edge-triggered signal; uses external 33 kΩ RI and 100 nF CI for EMI suppression. Use Value: Provides deterministic 600 µs/µF turn-on delay tuning and ±0.5 V hysteresis - critical for phase-accurate commutation timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inductive proximity switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCA305G | Includes internal integrating capacitor; lower max oscillator frequency (≤5 kHz w/o CI); higher IS (0.9 mA typ.) | Better suited for low-frequency, high-noise environments where internal integration simplifies layout | Select when board space is constrained and external RC filtering is undesirable |
| TLV3012IDBVR | Comparator-only device; requires external oscillator, reference, and output driver; 1.8–5.5 V supply; 350 nA quiescent current | Used in ultra-low-power, custom-designed proximity front-ends where full integration is not required | Select only for highly optimized, discrete designs targeting sub-1 µA standby current |
Compared with TCA305G, the TCA355GHLLA1 trades internal integration for higher frequency headroom and lower IS, while TLV3012IDBVR offers extreme low-power operation but demands full external signal chain design - making TCA355GHLLA1 optimal for standard industrial inductive sensors requiring balance of performance, simplicity, and ruggedness.
Availability
TCA355GHLLA1 is available at Aetrix Electronics and suitable for factory automation sensors, hydraulic position monitors, conveyor object counters, and rotary encoder index detectors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TCA355GHLLA1 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive, industrial, and sensor solutions, with leadership in bipolar and BC technology for analog interface ICs.
The TCA series targets inductive proximity sensing, delivering integrated oscillator-detection-output functionality in compact packages for robust, cost-effective industrial switch design.
FAQ
Can TCA355GHLLA1 operate below 5 V?
Yes, but only with VREF externally tied to VS - disabling internal reference regulation. This reduces accuracy and temperature stability of thresholds. The datasheet confirms functional operation down to ~2.5 V in this configuration, though recommended minimum is 5 V for full specification compliance.
What is the purpose of Pin 7 (NC)?
Pin 7 is a no-connect terminal - physically present but electrically unconnected internally. It must remain unconnected on PCB layout; routing traces or capacitors to it may cause parasitic coupling or mechanical stress. Infineon specifies NC to maintain package symmetry and thermal uniformity in PG-DSO-8-1.
How does the turn-on delay work on Pin 1?
Pin 1 accepts an external resistor between itself and VS to control charge current into an internal capacitor. A 390 kΩ resistor yields ~600 ms delay; values scale linearly. Delay begins after VS exceeds ~4.5 V and oscillator stabilizes - ensuring clean startup before output activation.
Is TCA355GHLLA1 pin-compatible with TCA305G?
No - TCA355GHLLA1 uses PG-DSO-8-1 (8-pin), while TCA305G uses PG-DIP-14-1 or PG-DSO-14-1 (14-pin). Pin functions differ significantly: TCA355 lacks dedicated hysteresis/distance adjustment pins, consolidating functionality into fewer terminals with different internal routing.
TCA355GHLLA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Proximity Only
- Proximity Detection:
- Yes
- Number of Inputs:
- 1
- LED Driver Channels:
- -
- Interface:
- -
- Resolution:
- -
- Voltage - Supply:
- 5V ~ 30V
- Current - Supply:
- 600µA
- Operating Temperature:
- -25°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-8
TCA355GHLLA1 FAQ
1.How can I place an order for TCA355GHLLA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TCA355GHLLA1 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 TCA355GHLLA1 reliable?
The price and inventory of TCA355GHLLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCA355GHLLA1 is usually 5 days.
3.What payment methods are accepted for TCA355GHLLA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCA355GHLLA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCA355GHLLA1?
TCA355GHLLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCA355GHLLA1 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 TCA355GHLLA1?
For technical support, including TCA355GHLLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCA355GHLLA1 requirements.
6.How does Aetrix verify that TCA355GHLLA1 is sourced from the original manufacturer or authorized distributors?
All TCA355GHLLA1 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 TCA355GHLLA1 meets industry standards.
7.What is the process for return or replacement of TCA355GHLLA1?
All TCA355GHLLA1 units undergo pre-shipment inspection (PSI). If there is an issue with TCA355GHLLA1, 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 TCA355GHLLA1 part is unused and in its original packaging.
Return procedure for TCA355GHLLA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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