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Toshiba Semiconductor and Storage TCTH011AE,LF(CT
- Part No.:
- TCTH011AE,LF(CT
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Supervisors
- Package:
- SOT-553
- Datasheet:
-
TCTH011AE,LF(CT.pdf
- Description:
- CMOS LINEAR IC OVER TEMP DETECTI
- Quantity:
- Payment:
- Shipping:
Inventory:8,000
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Product details
Overview
TCTH011AE,LF(CT from Toshiba Electronic Devices & Storage Corporation is a CMOS over-temperature detection IC that monitors external PTC thermistors and outputs a push-pull FLAG signal when temperature exceeds the threshold set by thermistor selection. It delivers 1 μA (Typ.) constant-current output to the PTC, consumes only 1.8 μA (Typ.) total supply current, operates from 1.7–5.5 V, and functions across –40 °C to +125 °C for thermal protection in portable electronics and industrial equipment.
For engineers reviewing the TCTH011AE,LF(CT datasheet, TCTH011AE,LF(CT pinout, TCTH011AE,LF(CT application, or TCTH011AE,LF(CT equivalent, this page provides verified technical context, exact pin roles, real-world use cases, and validated alternative parts - all grounded in Toshiba's Rev. 2.0.A specification and product family documentation.
Technical Context
The TCTH011AE,LF(CT implements a precision voltage-sensing architecture where its internal 1 μA (Typ.) PTCO current source develops a voltage across an external PTC thermistor; when that voltage exceeds the 0.50 V (Typ.) detect threshold (VDET), the push-pull PTCGOOD output drives low within 17 μs (tDET1). No RESET pin is present, so it auto-releases upon cooling below threshold.
It features UVLO activation at 1.5 V (VUVLO), 0.1 V hysteresis (VDETHYS), and operates with ±8% PTCO current accuracy at VDD = 3.3 V and 25 °C. Its design excludes latch functionality and open-drain configuration - both reserved for TCTH0x2xE and TCTH0xxBE variants respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PTCO Output Current | 1 μA (Typ.), ±8% accuracy at 3.3 V - sets precise thermistor voltage for reliable over-temp trip point |
| Detect Voltage (VDET) | 0.50 V (Typ.), range 0.36–0.64 V - defines threshold at which PTCGOOD asserts low |
| Hysteresis Voltage | 0.1 V - prevents oscillation during thermal transitions near trip point |
| Total Supply Current | 1.8 μA (Typ.) - enables always-on thermal monitoring in battery-powered systems |
| Supply Voltage Range | 1.7–5.5 V - compatible with Li-ion, 3.3 V, and 5 V logic rails without regulation |
| Operating Temperature | –40 °C to +125 °C - supports harsh environments including automotive cabin and industrial enclosures |
| Response Time tDET1 | 17 μs - ensures rapid fault signaling before thermal damage occurs |
Pinout & Package
IC package is ESV (SOT-553), measuring 1.6 mm × 1.6 mm × 0.55 mm with typical weight of 2.98 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 1.7–5.5 V; powers internal reference, comparator, and output driver |
| GND1 | Analog ground | Reference node for PTCO current source and VDET comparator - must connect to system GND |
| GND2 | Output ground | Return path for push-pull PTCGOOD output - must connect to same system GND as GND1 |
| PTCGOOD | FLAG signal output | Push-pull active-low output; drives high (≈VDD) when normal, low (≤0.2 V @ 4 mA) when over-temp detected |
| PTCO | Constant-current output | Sources 1 μA (Typ.) to external PTC thermistor - no external voltage allowed above 1 V |
Key Features
| Feature | Design Value |
|---|---|
| Auto-retry thermal flagging | Self-clearing output reverts to high state automatically when PTC voltage falls below VDET - no external reset required |
| Precision PTCO current source | 1 μA (Typ.) with ±8% tolerance ensures consistent trip-point setting across thermistor batches and temperatures |
| Ultra-low quiescent current | 1.8 μA (Typ.) total IDD enables multi-year operation on coin-cell batteries in IoT sensors and wearables |
| Fast response time | 17 μs detection latency (tDET1) allows integration into safety-critical thermal shutdown paths |
| ESV (SOT-553) footprint | 1.6 mm × 1.6 mm package minimizes PCB area while supporting automated assembly and thermal isolation from heat sources |
Applications
| Notebook PC Thermal Protection | Mobile Equipment Battery Monitoring |
|---|---|
Use Scenario: Monitors CPU/GPU die temperature via surface-mounted PTC thermistor to prevent thermal throttling or shutdown. IC Role / Device Role / Timing Role: Over-temperature detection IC generating immediate push-pull FLAG signal upon threshold breach. Use Value: Enables deterministic thermal management with 17 μs response and zero-latency auto-recovery after cooling - eliminating need for host MCU polling or software intervention. | Use Scenario: Tracks lithium-ion battery pack temperature during fast charging to halt charge cycle if cell exceeds safe limit. IC Role / Device Role / Timing Role: Standalone analog thermal watchdog interfacing directly with charger IC's enable/disable input. Use Value: 1.8 μA supply current extends battery shelf life; 1.7–5.5 V operation supports direct connection to battery voltage without LDO - reducing BOM count and board space. |
| Home Appliance Motor Control | Industrial Power Supply Monitoring |
Use Scenario: Detects overheating in BLDC motor windings using embedded PTC sensor to trigger fan speed increase or drive disable. IC Role / Device Role / Timing Role: Hardware-level thermal interrupt generator with push-pull output compatible with microcontroller GPIO or logic gate inputs. Use Value: Eliminates firmware dependency for critical thermal safety; ±8% PTCO accuracy ensures repeatable trip points across production units and ambient conditions. | Use Scenario: Supervises heatsink temperature in AC/DC power supplies to prevent MOSFET or transformer thermal runaway. IC Role / Device Role / Timing Role: Low-power, high-reliability thermal flagger placed adjacent to heatsink with isolated PTC thermistor routing. Use Value: ESV package's 0.55 mm height and 2.98 mg weight allow placement directly on heatsink without mechanical stress; –40 °C to +125 °C rating matches power stage operating envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar over-temperature detection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCTH012AE,LF(CT | Includes RESET pin and latch function - holds FLAG low until externally cleared | Required where persistent fault indication is needed (e.g., safety-critical shutdown requiring manual reset) | Select TCTH012AE,LF(CT only if latched behavior is mandatory; otherwise TCTH011AE,LF(CT offers simpler auto-retry operation |
| TCTH011BE,LF(CT | Same PTCO current and auto-retry, but open-drain PTCGOOD output instead of push-pull | Necessitates external pull-up resistor; supports wired-OR configurations and level translation | Choose TCTH011BE,LF(CT when interfacing with mixed-voltage systems or shared interrupt buses - TCTH011AE,LF(CT is preferred for direct MCU GPIO connection |
Compared with TCTH012AE,LF(CT, the TCTH011AE,LF(CT eliminates latch complexity and RESET routing for self-clearing thermal alerts; versus TCTH011BE,LF(CT, it removes external pull-up components and simplifies interface timing - making it optimal for cost-sensitive, space-constrained designs requiring immediate, deterministic flag assertion and release.
Availability
TCTH011AE,LF(CT is available at Aetrix Electronics and suitable for notebook PC thermal protection, mobile equipment battery monitoring, and industrial power supply monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for TCTH011AE,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 semiconductor solutions for consumer, industrial, and automotive markets, with emphasis on energy efficiency and miniaturization.
The TCTH0xxxE series is part of Toshiba's Thermoflagger™ line - purpose-built for ultra-low-power, high-accuracy over-temperature detection using external PTC thermistors in space-constrained portable and embedded systems.
FAQ
What is the primary function of the TCTH011AE,LF(CT?
The TCTH011AE,LF(CT is a dedicated over-temperature detection IC that uses a 1 μA (Typ.) constant-current source to bias an external PTC thermistor and assert a push-pull FLAG signal when temperature exceeds the threshold defined by the thermistor's resistance change. It requires no external components beyond the PTC and operates autonomously - making it ideal for fail-safe thermal monitoring in battery-powered and embedded systems. The TCTH011AE,LF(CT does not include latch or RESET functionality, distinguishing it from TCTH0x2xE variants.
Does the TCTH011AE,LF(CT require a RESET signal to clear its FLAG output?
No, the TCTH011AE,LF(CT does not have a RESET pin and operates in auto-retry mode: the PTCGOOD output returns high automatically once the PTC thermistor voltage drops below the detect threshold (VDET). This behavior is confirmed in Toshiba's Operation List 8-1 and Application Note 10.1. Unlike the TCTH0x2xE series, the TCTH011AE,LF(CT has no latch function - meaning the TCTH011AE,LF(CT is designed for transient thermal events requiring immediate recovery without host intervention.
What is the recommended PTC thermistor resistance range for use with the TCTH011AE,LF(CT?
For single-PTC use at 25 °C, Toshiba specifies a resistance range of 17.8 kΩ to 27 kΩ when α = 50 and β = 10, based on VDET (0.36–0.64 V) and IPTCO (0.76–1.27 μA). This ensures reliable trip-point setting across process and temperature variation. The TCTH011AE,LF(CT datasheet explicitly states these values in Section 10.3.1, and they assume standard PTC characteristics - deviations require recalculating using the provided formula. Always verify thermistor R–T curve against the TCTH011AE,LF(CT's 0.50 V (Typ.) VDET and 0.1 V hysteresis.
Can the TCTH011AE,LF(CT operate from a 1.8 V supply?
Yes, the TCTH011AE,LF(CT supports supply voltages from 1.7 V to 5.5 V, fully covering 1.8 V logic rails. Its UVLO threshold is 1.5 V (VUVLO), ensuring stable startup and operation at 1.8 V. Electrical characteristics such as PTCO current (0.80–1.22 μA) and detect voltage (0.36–0.64 V) remain valid across this range per Toshiba's Table 6. The TCTH011AE,LF(CT is therefore suitable for modern low-voltage microcontrollers and battery-powered devices where 1.8 V operation is standard.
What package type does the TCTH011AE,LF(CT use, and what are its key mechanical dimensions?
The TCTH011AE,LF(CT uses the ESV (SOT-553) package: a 5-pin, leadless, surface-mount package measuring 1.6 mm × 1.6 mm × 0.55 mm with typical weight of 2.98 mg. Pin assignment is VDD (1), GND1 (2), GND2 (3), PTCGOOD (4), and PTCO (5) - confirmed in Toshiba's Pin Assignment diagram (Page 3). This compact footprint supports high-density PCB layouts and automated assembly, and its low profile facilitates thermal isolation from adjacent heat sources - a critical requirement for accurate PTC-based temperature sensing. The TCTH011AE,LF(CT's ESV package is identical across the TCTH0xxxE series.
TCTH011AE,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:
- Push-Pull, Totem Pole
- Reset:
- -
- Reset Timeout:
- 214µs Typical
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- ESV
TCTH011AE,LF(CT FAQ
1.How can I place an order for TCTH011AE,LF(CT through Aetrix?
Please submit a Request for Quotation (RFQ) for TCTH011AE,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 TCTH011AE,LF(CT reliable?
The price and inventory of TCTH011AE,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 TCTH011AE,LF(CT is usually 5 days.
3.What payment methods are accepted for TCTH011AE,LF(CT?
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4.How is shipping managed for TCTH011AE,LF(CT?
TCTH011AE,LF(CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCTH011AE,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 TCTH011AE,LF(CT?
For technical support, including TCTH011AE,LF(CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCTH011AE,LF(CT requirements.
6.How does Aetrix verify that TCTH011AE,LF(CT is sourced from the original manufacturer or authorized distributors?
All TCTH011AE,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 TCTH011AE,LF(CT meets industry standards.
7.What is the process for return or replacement of TCTH011AE,LF(CT?
All TCTH011AE,LF(CT units undergo pre-shipment inspection (PSI). If there is an issue with TCTH011AE,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 TCTH011AE,LF(CT part is unused and in its original packaging.
Return procedure for TCTH011AE,LF(CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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