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Toshiba Semiconductor and Storage TCTH011BE,LF(CT
- Part No.:
- TCTH011BE,LF(CT
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Supervisors
- Package:
- SOT-553
- Datasheet:
-
TCTH011BE,LF(CT.pdf
- Description:
- CMOS LINEAR IC OVER TEMP DETECTI
- Quantity:
- Payment:
- Shipping:
Inventory:7,975
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Product details
Overview
TCTH011BE,LF(CT from Toshiba Electronic Devices & Storage Corporation is a CMOS over-temperature detection IC that monitors external PTC thermistors and outputs an open-drain FLAG signal (PTCGOOD) when temperature exceeds the threshold set by thermistor selection. It delivers 1 μA (Typ.) constant current to the PTCO pin, consumes only 1.8 μA (Typ.) total supply current, operates from 1.7 V to 5.5 V, and functions across –40 °C to +125 °C. It is used in notebook PCs and industrial equipment for thermal safety shutdown.
For engineers reviewing the TCTH011BE,LF(CT datasheet, TCTH011BE,LF(CT pinout, TCTH011BE,LF(CT application, or TCTH011BE,LF(CT equivalent, this page provides verified functional identity, confirmed pin roles, validated operating parameters, real-world thermal detection use cases, and two technically documented alternative parts with precise differences in latch behavior and output type.
Technical Context
The TCTH011BE,LF(CT implements a voltage-comparison-based over-temperature detection architecture: its internal reference compares PTCO pin voltage-generated by the product of 1 μA PTCO current and external PTC thermistor resistance-against a fixed 0.50 V (Typ.) detect threshold (VDET). No RESET pin is present, so it auto-releases the FLAG signal when thermistor resistance drops below threshold.
It uses open-drain PTCGOOD output with high-impedance "Hi-Z" state under normal conditions and active-low "L" assertion during over-temperature events. Its UVLO circuit disables operation below 1.5 V, and its 20 μs operation mask time prevents false triggering during power-up transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PTCO Output Current | 1.00 μA (Typ.), ±8 % accuracy at VDD = 3.3 V - sets precise thermistor voltage for reliable threshold crossing. |
| Detect Voltage (VDET) | 0.50 V (Typ.), 0.36–0.64 V range - defines exact PTCO terminal voltage at which over-temperature flag activates. |
| Supply Voltage Range | 1.7 V to 5.5 V - supports direct connection to common logic rails (1.8 V, 3.3 V, 5 V) without regulation. |
| Total Supply Current | 1.8 μA (Typ.), ≤2.6 μA max - enables battery-powered thermal monitoring with multi-year runtime. |
| Operating Temperature | –40 °C to +125 °C - qualifies for industrial and automotive under-hood ambient environments. |
| Response Time (tDET1) | 17 μs (Typ.) - ensures rapid fault capture before thermal damage occurs in sensitive electronics. |
| Output Type | Open-drain PTCGOOD - allows wired-OR configuration and flexible pull-up voltage selection up to 5.5 V. |
Pinout & Package
Package: ESV (SOT-553), 1.6 mm × 1.6 mm × 0.55 mm, surface-mount, 5-pin, weight 2.98 mg (Typ.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 1.7–5.5 V; powers internal reference, comparator, and PTCO current source. |
| GND1 | Analog ground | Reference node for PTCO current source and VDET comparator; must connect to system GND. |
| GND2 | Ground return path | Second ground pin improves noise immunity and thermal stability; must connect to system GND. |
| PTCGOOD | Open-drain FLAG output | Drives low on over-temperature; Hi-Z otherwise - requires external pull-up for logic-level signaling. |
| PTCO | Constant-current output | Sources 1 μA (Typ.) to external PTC thermistor(s); voltage at this pin rises as thermistor resistance increases. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-release over-temperature flag | No latch or RESET pin - automatically returns PTCGOOD to Hi-Z when thermistor cools below threshold. |
| Ultra-low quiescent current | 1.8 μA (Typ.) total IDD - minimizes impact on battery life in portable thermal monitoring systems. |
| High-accuracy PTCO current | ±8 % tolerance at 3.3 V - ensures consistent VDET crossing point across voltage and temperature. |
| Wide supply voltage range | 1.7–5.5 V operation - eliminates need for dedicated LDO in mixed-voltage systems. |
| Fast response time | 17 μs (tDET1) - detects rapid thermal excursions before component damage thresholds are exceeded. |
Applications
| Laptop CPU Thermal Protection | Industrial Motor Drive Over-Temp Monitoring |
|---|---|
Use Scenario: Monitors CPU die temperature via surface-mounted PTC thermistor to prevent thermal throttling or shutdown. IC Role / Device Role / Timing Role: Over-temperature detection IC generating active-low fault signal to system PMIC or microcontroller interrupt line. Use Value: Enables immediate thermal response with 17 μs latency and zero additional power overhead beyond 1.8 μA. |
Use Scenario: Detects IGBT junction overheating in motor drive inverters using PTC thermistors embedded near power modules. IC Role / Device Role / Timing Role: Standalone thermal watchdog asserting open-drain FLAG to gate driver disable input upon over-temperature event. Use Value: Provides fail-safe protection independent of main controller, with 125 °C operational rating matching power stage requirements. |
| Smart Home Appliance Heating Element Safety | 5G Base Station Power Amplifier Thermal Guard |
Use Scenario: Supervises heating coil temperature in smart ovens or water heaters to prevent fire hazard. IC Role / Device Role / Timing Role: Low-power thermal sensor interface converting PTC resistance change into logic-compatible fault flag. Use Value: Delivers certified thermal cutoff function with <2.6 μA max current draw, supporting Energy Star compliance. |
Use Scenario: Protects GaN FETs in massive MIMO RF power amplifiers from thermal runaway during peak transmit bursts. IC Role / Device Role / Timing Role: High-speed thermal detector feeding PTCGOOD signal directly to PA enable/disable control path. Use Value: Achieves 17 μs fault detection latency and operates reliably at 125 °C ambient - critical for dense RF module packaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar over-temperature detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCTH012BE,LF(CT | Includes RESET pin and latch function - holds PTCGOOD low until external reset is applied. | Required where persistent fault indication is needed after over-temperature event (e.g., safety-critical lockout). | Select TCTH012BE,LF(CT only if latched behavior is mandatory; TCTH011BE,LF(CT is preferred for self-clearing thermal alerts. |
| TCTH011AE,LF(CT | Push-pull PTCGOOD output instead of open-drain; no external pull-up required. | Suitable for single-rail systems where open-drain wiring complexity must be avoided. | Choose TCTH011AE,LF(CT when driving standard CMOS inputs directly; TCTH011BE,LF(CT offers greater flexibility with mixed-voltage pull-ups. |
Compared with TCTH011BE,LF(CT, TCTH012BE,LF(CT adds latch persistence at the cost of requiring a RESET signal, while TCTH011AE,LF(CT simplifies board layout with push-pull output but loses voltage-level flexibility - all three share identical PTCO current, VDET, and supply specs.
Availability
TCTH011BE,LF(CT is available at Aetrix Electronics and suitable for notebook PC thermal management, industrial motor drives, smart home appliance safety systems, and 5G base station power amplifier protection requiring stable component supply and long-term lifecycle support.
Supply support for TCTH011BE,LF(CT 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
Toshiba Electronic Devices & Storage Corporation designs and manufactures high-reliability analog and power semiconductors for industrial, computing, and consumer applications.
The TCTH0xxxE series is part of Toshiba's Thermoflagger™ family - purpose-built for ultra-low-power, high-accuracy PTC-based over-temperature detection in space-constrained and battery-sensitive systems.
FAQ
What is the primary function of the TCTH011BE,LF(CT?
The TCTH011BE,LF(CT is an over-temperature detection IC that sources a precise 1 μA current to an external PTC thermistor and asserts an open-drain FLAG signal (PTCGOOD) when the resulting PTCO pin voltage exceeds 0.50 V (Typ.). It operates autonomously without software, making it ideal for hardware-level thermal safety in laptops, industrial drives, and appliances. The TCTH011BE,LF(CT does not include latch or RESET functionality - it auto-clears when temperature falls.
Does the TCTH011BE,LF(CT require an external pull-up resistor on the PTCGOOD pin?
Yes, the TCTH011BE,LF(CT features an open-drain PTCGOOD output, so an external pull-up resistor is mandatory to establish a defined high logic level. The pull-up voltage may be up to 5.5 V, independent of VDD, enabling interfacing with higher-voltage logic domains. Typical values range from 4.7 kΩ to 10 kΩ depending on rise-time and bus loading requirements. The TCTH011BE,LF(CT itself draws no current in the Hi-Z state, preserving system power efficiency.
What is the maximum number of PTC thermistors that can be connected to the TCTH011BE,LF(CT?
The TCTH011BE,LF(CT supports up to approximately 30 PTC thermistors connected in series between the PTCO pin and GND, provided all units have identical resistance at 25 °C. This configuration allows distributed thermal sensing across large PCB areas or multi-component assemblies. However, design must account for combined resistance shift during single-point overheating - the TCTH011BE,LF(CT triggers when any one thermistor crosses threshold, not all simultaneously.
How accurate is the PTCO current in the TCTH011BE,LF(CT across temperature and supply voltage?
The TCTH011BE,LF(CT delivers PTCO current with ±8 % accuracy at VDD = 3.3 V and 25 °C, and maintains ±17 % accuracy across the full operating range of –40 °C to +125 °C and VDD = 1.7 V to 5.5 V. This is specified in the Electrical Characteristics table (IPTCO min/max values) and ensures predictable VDET crossing points when paired with properly selected PTC thermistors - critical for repeatable thermal trip points in production systems.
Can the TCTH011BE,LF(CT operate from a 1.8 V supply rail?
Yes, the TCTH011BE,LF(CT is fully specified to operate from 1.7 V to 5.5 V, making it compatible with standard 1.8 V logic supplies. At 1.8 V, its PTCO current remains within specification (0.80–1.22 μA), detect voltage stays at 0.50 V (Typ.), and total supply current is ≤2.6 μA. This enables direct integration into low-voltage portable systems without level-shifting or voltage boosting circuitry - a key advantage over higher-VDD-only thermal detectors.
TCTH011BE,LF(CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- TCTH0xxxE
- Package/Case:
- SOT-553
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Thermal
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 0.5V
- Output:
- Open Drain or Open Collector
- Reset:
- -
- Reset Timeout:
- 214µs Typical
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- ESV
TCTH011BE,LF(CT FAQ
1.How can I place an order for TCTH011BE,LF(CT through Aetrix?
Please submit a Request for Quotation (RFQ) for TCTH011BE,LF(CT 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 TCTH011BE,LF(CT reliable?
The price and inventory of TCTH011BE,LF(CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCTH011BE,LF(CT is usually 5 days.
3.What payment methods are accepted for TCTH011BE,LF(CT?
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4.How is shipping managed for TCTH011BE,LF(CT?
TCTH011BE,LF(CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCTH011BE,LF(CT 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 TCTH011BE,LF(CT?
For technical support, including TCTH011BE,LF(CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCTH011BE,LF(CT requirements.
6.How does Aetrix verify that TCTH011BE,LF(CT is sourced from the original manufacturer or authorized distributors?
All TCTH011BE,LF(CT 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 TCTH011BE,LF(CT meets industry standards.
7.What is the process for return or replacement of TCTH011BE,LF(CT?
All TCTH011BE,LF(CT units undergo pre-shipment inspection (PSI). If there is an issue with TCTH011BE,LF(CT, 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 TCTH011BE,LF(CT part is unused and in its original packaging.
Return procedure for TCTH011BE,LF(CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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