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Home > Products > Integrated Circuits (ICs) > Interface > Sensor, Capacitive Touch

Infineon Technologies TCA305GXLLA1

Name: TCA305GXLLA1
Brand: Infineon Technologies
SKU: TCA305GXLLA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TCA305GXLLA1

Manufacturer:: Infineon Technologies

Category:: Sensor, Capacitive Touch

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: TCA305GXLLA1.pdf

Description:: IC PROXIMITY SWITCH PDSO-14

Quantity:: RFQ Add To RFQ list

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Inventory:3,054

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Product details

Overview

TCA305GXLLA1 from Infineon Technologies is a bipolar monolithic integrated circuit designed as a proximity switch controller for inductive sensors, featuring open-loop current consumption < 0.9 mA, output saturation voltage ≤ 0.22 V at 50 mA, and operation across VS = 5–30 V with built-in oscillator (0.015–1.5 MHz). It enables metal-detection-based switching without external integrating capacitor and supports adjustable turn-on delay via external resistor.

For engineers reviewing the TCA305GXLLA1 datasheet, TCA305GXLLA1 pinout, TCA305GXLLA1 application, or TCA305GXLLA1 equivalent, key selection considerations include its dual-output logic behavior (Q and Q̅), temperature-stable hysteresis, supply-voltage-independent switching distance, and SMD-compatible PG-DSO-14-1 package with 14 pins and lead-free RoHS compliance.

Technical Context

The TCA305GXLLA1 integrates an LC oscillator, amplitude detector, comparator with hysteresis, and two complementary push-pull outputs (Q and Q̅) that respond to damping of an external resonant coil by ferrous targets. Its oscillator frequency is user-adjustable from 15 kHz to 1.5 MHz via external L/C components, and internal reference voltage (VREF ≈ 3.2 V) remains stable over temperature and supply variations.

Turn-on delay is configurable via an external resistor connected to pin 3 (DD), enabling timing control from 600 µs/µF up to ~100 ms; output short-circuit protection lasts 10 s to 1 min depending on thermal conditions, and outputs disable automatically when VS drops below ~4.5 V and re-enable after oscillator stabilization at VS ≥ 5 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage range	5 V to 30 V - supports wide industrial rail voltages without external regulation
Oscillator frequency range	0.015 MHz to 1.5 MHz - enables tuning for target size, material, and sensing distance
Open-loop current consumption	0.6 mA typ., 0.9 mA max - reduces system standby power in battery-backed or energy-sensitive designs
L-output saturation voltage	0.10 V at 25 mA, 0.22 V at 50 mA - ensures low conduction loss driving external transistors or optocouplers
H-output leakage current	10 µA max at VQH = 30 V - maintains high-impedance off-state for reliable signal isolation
Switching hysteresis	0.4 V to 0.6 V - provides stable on/off transition unaffected by temperature or supply drift
Ambient temperature range	–25 °C to +85 °C - qualified for industrial automation and factory-floor environments

Pinout & Package

Package: PG-DSO-14-1 (14-pin plastic small-outline package, surface-mount, RoHS-compliant lead plating).

Pin/Terminal	Circuit Role	Design Meaning
V_S	Positive supply input	Accepts 5–30 V DC; powers internal oscillator, reference, and output stages
GND	Ground reference	Common return path for all internal circuits and external resonant network
Q	Inverted output	Active-low push-pull output; sinks up to 50 mA when damped condition detected
Q̅	Non-inverted output	Complementary active-high push-pull output; sources current when undamped
DD	Turn-on delay control	Connect external resistor to V_S to set delay time; open or tied to V_S for zero delay
CI	Integrating capacitance node	Accepts 1 nF capacitor (or RC network) to filter noise and stabilize detection threshold
R_Hy	Hysteresis adjustment	External resistor sets hysteresis width (0.4–0.6 V); improves immunity to vibration or EMI
R_Di	Distance adjustment	External resistor tunes sensitivity and nominal switching distance independently of coil parameters
V_REF	Internal reference output	Stable 3.2 V reference; can be used externally or bypassed if VS > 5 V and stability not required
OSC	Oscillator connection	Connects to external LC tank; frequency determined by L₀/C₀ values and layout parasitics
D	Temperature compensation	Optional diode/resistor node to counteract TC of coil; not mandatory but improves thermal stability
NC	No connect	Pin 12 is internally unconnected; must remain floating or grounded per layout guidelines
NC	No connect	Pin 13 is internally unconnected; no electrical function
NC	No connect	Pin 14 is internally unconnected; reserved for mechanical alignment or future use

Key Features

Feature	Design Value
Zero external capacitor operation	Functions reliably without CI; simplifies BOM and PCB layout for basic proximity detection
Temperature-stable hysteresis	Hysteresis remains constant across –25 °C to +85 °C and full supply range - eliminates recalibration in thermal cycling
Supply-voltage-independent switching distance	Switching point shifts < ±2% over 5–30 V supply - ensures repeatable detection regardless of rail variation
Short-circuit protected outputs	Withstands 10 s to 1 min of continuous output shorting - protects against wiring faults or load failures
Auto-disable at low supply	Outputs disable below ~4.5 V and re-enable only after oscillator stabilizes - prevents erratic switching during brownout

Applications

Industrial Proximity Sensor

Machine Safety Guard Switch

Use Scenario: Detecting presence of steel machine parts in CNC tool changers or robotic end-effectors.

IC Role / Device Role / Timing Role: Proximity switch controller generating clean Q/Q̅ logic signals based on coil damping by ferrous targets.

Use Value: Enables reliable position verification without physical contact, supporting IP67-rated housings and long service life under vibration.

Use Scenario: Monitoring door/guard position on press brakes or laser cutters to enforce safety interlocks.

IC Role / Device Role / Timing Role: Dual-output controller providing fail-safe complementary signals to safety PLC inputs.

Use Value: Constant hysteresis and supply-independent switching ensure deterministic response even during voltage sags or ambient temperature swings.

Conveyor Belt Object Detection

Automated Assembly Fixture Sensing

Use Scenario: Counting metal components on high-speed conveyor lines using flush-mounted inductive sensors.

IC Role / Device Role / Timing Role: Oscillator-amplitude detector core with adjustable R_Di/R_Hy for tuning sensitivity and noise rejection.

Use Value: Supports up to 5 kHz switching frequency and 100 ms turn-on delay - accommodates fast-moving objects and avoids false triggers from belt jitter.

Use Scenario: Verifying correct placement of screws, brackets, or stamped parts in precision assembly jigs.

IC Role / Device Role / Timing Role: Proximity controller interfacing with external L/C coils wound on ferrite pot cores (e.g., N22, M33 types).

Use Value: High sensitivity allows use of lower-Q coils and larger air gaps - reduces coil cost and eases mechanical integration in tight fixtures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar inductive proximity switch controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TCA355GXLLA1	Same pinout and function; higher R_th,SA (200 K/W vs. 140 K/W), slightly higher IS (1.0 mA max)	Optimized for lower-power, thermally constrained SMD layouts where peak dissipation is critical	Select when thermal resistance budget is tighter and 0.1 mA extra quiescent current is acceptable
TLV3012IDR	Dual comparator with reference; no integrated oscillator or output drivers - requires external LC tank, biasing, and driver transistors	Used in custom-designed proximity modules where flexibility outweighs integration benefit	Choose only when full design control over oscillator frequency, hysteresis, and drive strength is required

Compared with TCA305GXLLA1, TCA355GXLLA1 offers identical functionality in a thermally enhanced variant, while TLV3012IDR demands significant external circuitry but enables fine-grained optimization of sensing dynamics and power trade-offs.

Availability

TCA305GXLLA1 is available at Aetrix Electronics and suitable for industrial automation, machine safety systems, and conveyor monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant SMD packaging.

Supply support for TCA305GXLLA1 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, sensor ICs, and automotive electronics, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

The TCA series belongs to Infineon's legacy analog sensor interface product line, engineered specifically for robust, low-cost inductive proximity switching in harsh industrial environments - emphasizing thermal stability, EMC resilience, and minimal external component count.

FAQ

Can TCA305GXLLA1 operate below 5 V?

Yes - operation between ~2.5 V and 5 V is possible only if V_REF is externally tied to V_S, disabling internal reference regulation. In this mode, V_REF tracks supply voltage, and the turn-on delay pin (DD) must be connected directly to V_S. Performance specifications such as hysteresis and oscillator stability are not guaranteed below 5 V.

What is the maximum recommended value for the external integrating capacitor CI?

The datasheet recommends 1 nF as typical, but CI may be increased up to 10 nF when paired with a 1 MΩ series resistor (RI) to form an RC integrator. Larger capacitors improve noise immunity but extend turn-on delay and reduce maximum usable switching frequency; values beyond 10 nF risk instability or excessive delay in fast-response applications.

How does the TCA305GXLLA1 handle temperature drift in the external LC coil?

It uses pin D (temperature compensation node) to connect a diode or resistor network that counteracts the coil's positive temperature coefficient. When the coil's inductance rises with temperature, the compensation network adjusts the effective threshold to maintain consistent switching distance - verified across –25 °C to +85 °C with proper external component selection.

Is the PG-DSO-14-1 package compatible with standard reflow profiles?

Yes - the PG-DSO-14-1 package is qualified for lead-free reflow per JEDEC J-STD-020, with peak temperature up to 260 °C for 30 seconds. Thermal resistance (R_th,SA = 140 K/W) requires adequate copper pour and thermal vias on the PCB for sustained 50 mA output loading; board-level thermal simulation is advised for continuous high-current operation.

TCA305GXLLA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Package/Case:: 14-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-14-1

TCA305GXLLA1 FAQ

1.How can I place an order for TCA305GXLLA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TCA305GXLLA1 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 TCA305GXLLA1 reliable?

The price and inventory of TCA305GXLLA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCA305GXLLA1 is usually 5 days.

3.What payment methods are accepted for TCA305GXLLA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCA305GXLLA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TCA305GXLLA1?

TCA305GXLLA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TCA305GXLLA1 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 TCA305GXLLA1?

For technical support, including TCA305GXLLA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCA305GXLLA1 requirements.

6.How does Aetrix verify that TCA305GXLLA1 is sourced from the original manufacturer or authorized distributors?

All TCA305GXLLA1 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 TCA305GXLLA1 meets industry standards.

7.What is the process for return or replacement of TCA305GXLLA1?

All TCA305GXLLA1 units undergo pre-shipment inspection (PSI). If there is an issue with TCA305GXLLA1, 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 TCA305GXLLA1 part is unused and in its original packaging.

Return procedure for TCA305GXLLA1:

1.Submit a request within 90 days.

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

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