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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

STMicroelectronics STCC08

Name: STCC08
Brand: STMicroelectronics
SKU: STCC08
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STCC08

Manufacturer:: STMicroelectronics

Category:: Power Management - Specialized

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: STCC08.pdf

Description:: IC DETECTOR AC SW FAILURE 8-SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:3,882

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Product details

Overview

STCC08 from STMicroelectronics is an AC switch failure mode detector and gate driver IC for solid-state AC switches (ACS, ACST, TRIACs), featuring 28 mA max sink gate drive current, adjustable gate current via RIG pin, diode-mode/short-circuit/open-switch detection across both AC polarities, and SO-8 SMD package - deployed in home appliance safety monitoring systems requiring IEC 60335-1 compliance.

For engineers reviewing the STCC08 datasheet, STCC08 pinout, STCC08 application, or STCC08 equivalent, this device delivers integrated AC switch health diagnostics with CMOS-compatible MCU interface, zero-voltage synchronization support, and robust ESD/burst immunity per IEC 61000-4-2/4-4 - critical for door lock control, washing machine water sensors, and induction load safety shutdown.

Technical Context

The STCC08 integrates dual-function circuitry: a logic-level gate driver with programmable sink current (via external RIG resistor) and a bidirectional AC status monitor that samples voltage across the switch using the AC pin and reports failure states via open-collector AVF output. It operates over 2.97–5.5 V supply and supports continuous, pulsed, or phase-angle drive modes.

Failure detection logic distinguishes diode-mode (AVF toggles at half-cycle), short-circuit (AVF held low), and open-switch (AVF high-impedance) conditions using internal signal shaping and threshold comparators referenced to 82–236 µA AC sense current - validated under −20 °C to +85 °C ambient and up to +125 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage	2.97–5.5 V - supports direct interfacing with 3.3 V or 5 V MCUs without level-shifting
Gate drive sink current	20–28 mA - sufficient to trigger 5–10 mA IGT ACS/ACST/TRIACs with margin
AC sense threshold	82–236 µA - detects switch conduction state across 120/230 V AC lines using RAC = 100 kΩ / 300 kΩ dividers
AVF output type	Open-collector, CMOS-compatible - enables pull-up or opto-coupler isolation for insulated designs
ESD immunity	±8 kV air discharge (IEC 61000-4-2) on VCC/IN/G/AC pins - ensures reliability in noisy appliance environments
Thermal resistance	140 °C/W (Junction-to-Ambient) - defines power dissipation limit in SO-8 package at rated load

Pinout & Package

STCC08 is housed in a standard SO-8 surface-mount package (JEDEC MS-012AC), with 1.27 mm pitch, 4.9 mm × 6.0 mm body, and UL94 V0 epoxy molding compound. Pin 1 is marked by a beveled corner or dot.

Pin/Terminal	Circuit Role	Design Meaning
1 IN	Logic input	CMOS-compatible MCU drive signal controlling gate activation (V_ON = 0.7×V_CC)
2 AVF	Status feedback output	Open-collector failure indicator: low = diode mode/short; high-Z = open switch/OK
3 N/C	No connection	Internally unconnected - must remain floating or grounded per layout guidelines
4 AC	AC switch sense input	High-impedance node for voltage sampling across RAC/RSHUNT to detect conduction polarity and failure
5 VCC	Positive supply	Power rail for internal logic and driver stages; requires local 100 nF decoupling
6 G	Gate driver output	Sink-only output driving ACS gate cathode; max 28 mA with RIG = 30 Ω
7 RIG	Gate current setting	Resistor-to-GND sets peak gate current - optimized for min ambient temp and ACS IGT rating
8 GND	Power reference	Return path for VCC, AVF pull-up, and AC sense network; must be low-impedance

Key Features

Feature	Design Value
Diode-mode failure detection	Identifies reverse-conduction faults in ACS/ACSTs during both AC half-cycles - required for IEC 60335-1 Annex H compliance
Short-circuit & open-switch detection	Distinguishes hard shorts (AVF = low) from open loads (AVF = high-Z) using RSHUNT biasing - enables fail-safe relay deactivation
Adjustable gate drive strength	RIG pin allows dynamic optimization of gate current vs. temperature and IGT, reducing power loss in battery-backed or thermally constrained appliances
ZVS-compatible status sensing	AVF output functions independently of gate drive timing - supports zero-voltage switching diagnostics without interfering with phase-control operation
Insulated interface readiness	IN and AVF support opto-coupler coupling; G output drives ACS directly without external buffer - simplifies isolated front-end relay control

Applications

Washing Machine Water Sensor Control

Dishwasher Door Lock Safety Monitoring

Use Scenario: Detects failure of electromechanical water valve switch during fill cycle to prevent overflow or dry-run damage.

IC Role / Device Role / Timing Role: STCC08 drives the ACS controlling the valve and monitors its health via AVF; MCU reads AVF at AC peak voltage to avoid inductive lag errors.

Use Value: Eliminates need for separate current-sense shunt and comparator, reducing BOM count while meeting IEC 60335-1 Class II insulation requirements.

Use Scenario: Monitors integrity of door lock solenoid driver ACS during active locking to prevent accidental opening under load.

IC Role / Device Role / Timing Role: STCC08 senses open-circuit failure (AVF high-Z) and diode-mode fault (AVF toggling) - triggering immediate MCU-controlled power cutoff.

Use Value: Enables single-pin MCU diagnostic instead of dual GPIOs, improving system safety certification path for Class X appliances.

Induction Cooktop Load Protection

Smart Oven Heating Element Supervision

Use Scenario: Detects short-circuit or latch-up in TRIAC-driven heating elements during high-current cooking cycles.

IC Role / Device Role / Timing Role: STCC08's AC pin samples voltage across RAC/RSHUNT; AVF asserts low on short, allowing MCU to disable gate within <10 ms.

Use Value: Prevents thermal runaway by enabling sub-cycle fault response - critical for IEC 61000-4-4 burst immunity in kitchen EMI environments.

Use Scenario: Verifies continuity of heating element ACS before and during bake cycles to avoid fire hazard from open-load arcing.

IC Role / Device Role / Timing Role: STCC08 replaces discrete opto-TRIAC + comparator solution; AVF status read during zero-crossing window ensures accurate open-detection.

Use Value: Reduces PCB area by 40% vs. discrete implementation while maintaining 125 °C junction operation for oven enclosure mounting.

Equivalent & Alternatives

The following parts are listed as comparable options for similar AC switch failure detection applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IL4208	Optocoupler-based ACS driver with integrated zero-cross detection; no open-switch or diode-mode diagnostics	Lacks bidirectional failure detection - suitable only for basic ON/OFF control, not IEC 60335-1 Annex H compliance	Select when cost-sensitive non-safety designs require only zero-cross switching without diagnostics
TLP3906	Photorelay with 1 A load rating; no built-in failure sensing - requires external comparator and sense resistors	Higher load current capability but adds ≥4 passive components and calibration effort for failure detection	Select when driving >1 A resistive loads where STCC08's 10 mA IGT limit is insufficient

Compared with IL4208 and TLP3906, STCC08 uniquely integrates full AC switch failure mode detection (diode, short, open) with gate drive in one SO-8 package - eliminating external components, reducing design validation effort for safety-critical home appliances, and enabling single-MCU-pin diagnostics.

Availability

STCC08 is available at Aetrix Electronics and suitable for washing machine water sensor control, dishwasher door lock safety monitoring, and induction cooktop load protection requiring stable component supply and long-term industrial lifecycle support.

Supply support for STCC08 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, analog chips, and MEMS sensors for industrial, automotive, and consumer markets.

The STCC08 belongs to ST's appliance safety IC product line, engineered specifically to simplify IEC 60335-1 and IEC 60730-1 compliance for AC-powered white goods with solid-state switching.

FAQ

What is the maximum AC line voltage the STCC08 can safely monitor?

The STCC08 itself does not directly withstand AC line voltage; it monitors through external resistor dividers (RAC/RSHUNT). For 120 V AC, RAC = 100 kΩ is recommended; for 230 V AC, RAC = 300 kΩ. With proper divider design and ACS clamping (800–1100 V), the IC supports mains-connected applications up to 230 V RMS with surge immunity per IEC 61000-4-4 ±4 kV.

Can the STCC08 drive a TRIAC directly without external components?

Yes - the STCC08's G pin provides up to 28 mA sink current, sufficient to trigger standard 5–10 mA IGT TRIACs (e.g., BTA06-600B) when RIG is set to 30 Ω. No external transistor or buffer is needed, though a series gate resistor (e.g., 100 Ω) is recommended for EMI suppression and dv/dt control.

How does the STCC08 distinguish between diode-mode and short-circuit failures?

Diode-mode failure causes AVF to toggle low every half-cycle (due to conduction in one polarity only), while short-circuit holds AVF continuously low. The MCU discriminates by measuring AVF pulse width and period against AC zero-crossing timing - confirmed in Table 8 and Figure 4 of the datasheet for inductive loads.

Is the STCC08 RoHS-compliant and lead-free?

Yes - STCC08 is supplied in ECOPACK®-compliant SO-8 packages with lead-free second-level interconnects, meeting RoHS Directive 2011/65/EU. The inner box label indicates JEDEC JESD97-compliant marking, and soldering profiles follow IPC/JEDEC J-STD-020 for moisture sensitivity level (MSL) 3.

STCC08 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Applications:: Home Appliance

Current - Supply:: 2mA

Voltage - Supply:: 2.97V ~ 5.5V

Operating Temperature:: -20°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

STCC08 FAQ

1.How can I place an order for STCC08 through Aetrix?

Please submit a Request for Quotation (RFQ) for STCC08 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 STCC08 reliable?

The price and inventory of STCC08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STCC08 is usually 5 days.

3.What payment methods are accepted for STCC08?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STCC08 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STCC08?

STCC08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STCC08 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 STCC08?

For technical support, including STCC08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STCC08 requirements.

6.How does Aetrix verify that STCC08 is sourced from the original manufacturer or authorized distributors?

All STCC08 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 STCC08 meets industry standards.

7.What is the process for return or replacement of STCC08?

All STCC08 units undergo pre-shipment inspection (PSI). If there is an issue with STCC08, 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 STCC08 part is unused and in its original packaging.

Return procedure for STCC08:

1.Submit a request within 90 days.

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

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