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Texas Instruments TMP75CQDGKRQ1
- Part No.:
- TMP75CQDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TMP75CQDGKRQ1.pdf
- Description:
- SENSOR DIGITAL -40C-125C 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,783
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Product details
Overview
TMP75CQDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified digital temperature sensor with 12-bit ADC, two-wire (I²C/SMBus) interface, ±1°C accuracy over –40°C to +125°C, 0.0625°C resolution, and programmable ALERT output - used for thermal protection in motor drivers, power supplies, and automotive ECUs.
For engineers reviewing the TMP75CQDGKRQ1 datasheet, TMP75CQDGKRQ1 pinout, TMP75CQDGKRQ1 application, or TMP75CQDGKRQ1 equivalent, this page delivers verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options - all grounded in TI's SBOS840 production data sheet.
Technical Context
The TMP75CQDGKRQ1 integrates a band-gap BJT temperature-sensing element with a 12-bit successive-approximation ADC, delivering digitized Celsius readings left-justified in two bytes. Its internal voltage regulator enables operation from 1.4 V to 3.6 V, and its open-drain SDA/ALERT pins support bus sharing with up to eight devices via A0–A2 address pins.
It supports both continuous-conversion mode (80 ms update rate, 27 ms conversion time) and one-shot mode, with shutdown current as low as 0.3 µA (typ). The ALERT pin operates in comparator or interrupt mode, configurable via TM and POL bits in the Configuration register, with hysteresis enabled by independent THIGH/TLOW registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±1°C (max) from –40°C to +125°C - ensures reliable thermal trip decisions without system-level calibration |
| Resolution | 0.0625°C (12-bit) - enables fine-grained thermal throttling control in battery management and CPU thermal regulation |
| Supply Range | 1.4 V to 3.6 V - compatible with 1.8-V logic domains and legacy 3.3-V systems without level-shifting |
| Quiescent Current | 15 µA (typ) active, 0.3 µA (typ) shutdown - extends battery life in always-on automotive sensors |
| Interface | Two-wire (I²C/SMBus) up to 400 kHz (fast-mode), with Hs-mode support to 3 MHz - interoperable with standard microcontroller peripherals |
| Address Options | 8 unique slave addresses via A0/A1/A2 pins - allows multi-sensor thermal monitoring on single bus |
| Alert Function | Programmable THIGH/TLOW registers with fault counter and polarity control - enables autonomous overtemperature response without host polling |
Pinout & Package
VSSOP-8 package (3.00 mm × 3.00 mm), thin-profile surface-mount, lead-free and RoHS-compliant - optimized for space-constrained automotive PCBs and high-density thermal sensing layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SDA | I/O (open-drain) | Two-wire serial data line; requires external pull-up; supports read/write transfers and ACK/NACK signaling |
| 2: SCL | Input | Serial clock input; accepts 1 kHz–400 kHz (fast-mode) or up to 3 MHz (Hs-mode) with SMBus master code |
| 3: ALERT | Output (open-drain) | Configurable overtemperature alert; active-low or active-high; drives external interrupt or comparator latch |
| 4: GND | Power Reference | Analog/digital ground reference; primary thermal path to PCB; critical for accurate local die temperature measurement |
| 5: A2 | Input | MSB address select; sets bit 2 of 7-bit slave address (1001xxx); latched at start of communication |
| 6: A1 | Input | Mid-bit address select; sets bit 1 of slave address; enables up to 8 devices on same bus |
| 7: A0 | Input | LSB address select; sets bit 0 of slave address; tied to GND or VS to configure unique I²C address |
| 8: VS | Power Input | Supply voltage input (1.4 V–3.6 V); powers internal regulator, ADC, and logic; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in automotive ECU, ADAS, and powertrain modules |
| Factory-calibrated accuracy | Eliminates need for end-of-line temperature calibration, reducing test time and BOM cost in volume production |
| Programmable ALERT hysteresis | Prevents chatter during thermal transients by enforcing consecutive fault detection before assertion |
| One-shot conversion mode | Enables precise on-demand measurements - ideal for low-duty-cycle battery-powered applications |
| Integrated spike suppression | Schmitt-trigger inputs and noise filters on SDA/SCL ensure robust operation in electrically noisy automotive environments |
Applications
| Server Thermal Management | Automotive Power Inverter |
|---|---|
Use Scenario: Real-time CPU/GPU die temperature monitoring in rack-mounted servers to trigger dynamic frequency scaling. IC Role / Device Role / Timing Role: Primary temperature sensor feeding closed-loop thermal control firmware; updates every 80 ms in continuous mode. Use Value: ±1°C accuracy across –40°C to +125°C eliminates derating margins, enabling higher sustained compute performance within safe junction limits. | Use Scenario: IGBT module temperature monitoring in EV traction inverters to prevent thermal runaway during regenerative braking. IC Role / Device Role / Timing Role: Standalone overtemperature protector; ALERT pin directly disables gate driver PWM when THIGH is exceeded. Use Value: Programmable hysteresis and fault counter suppress false trips from transient spikes, improving system reliability under high dv/dt conditions. |
| Industrial Motor Drive | Battery Pack Protection |
Use Scenario: Winding temperature tracking in HVAC compressors to enforce duty-cycle limits and extend insulation life. IC Role / Device Role / Timing Role: Local thermal sensor mounted on motor control PCB near power stage; communicates via isolated I²C bus. Use Value: 0.0625°C resolution enables predictive maintenance algorithms that detect subtle resistance-based temperature drift before failure. | Use Scenario: Cell-can surface temperature monitoring in 48-V mild-hybrid battery packs to comply with ISO 6469 safety requirements. IC Role / Device Role / Timing Role: Low-power thermal guard; operates in shutdown mode between periodic wake-ups to minimize self-heating error. Use Value: 0.3 µA shutdown current extends monitoring interval to >1 hour on coin-cell backup, preserving state-of-charge integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMM/NOPB | ±2°C accuracy over –25°C to +100°C; no automotive qualification; 9-bit resolution (0.5°C) | Targeted at commercial-grade industrial controls, not safety-critical automotive systems | Select when AEC-Q100 compliance and sub-1°C accuracy are not required; lower cost, wider availability |
| NCT75MTR | Pin/register-compatible with TMP75C-Q1 but rated only to +105°C; lacks AEC-Q100 Grade 1 certification | Suitable for non-automotive thermal management where ambient range ≤ +105°C suffices | Choose for drop-in replacement in legacy NCT75 designs; verify thermal margin for +125°C operation |
Compared with LM75BIMM/NOPB and NCT75MTR, TMP75CQDGKRQ1 uniquely delivers automotive-grade reliability, tighter accuracy over full Grade 1 range, and guaranteed operation at 125°C ambient - making it the only option qualified for under-hood ECU and inverter applications requiring functional safety alignment.
Availability
TMP75CQDGKRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, server thermal management, and industrial motor drive applications requiring stable component supply across extended product lifecycles.
Supply support for TMP75CQDGKRQ1 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
Texas Instruments is a global semiconductor leader focused on analog and embedded processing technologies, with deep expertise in precision sensing, power management, and automotive electronics.
The TMP75C-Q1 product line delivers AEC-Q100-qualified, low-voltage digital temperature sensors designed specifically for thermal protection and compensation in automotive ECUs, battery systems, and power electronics - emphasizing accuracy, noise immunity, and long-term stability.
FAQ
What is the operating temperature range of the TMP75CQDGKRQ1?
The TMP75CQDGKRQ1 is specified for –40°C to +125°C ambient operating temperature, meeting AEC-Q100 Grade 1 requirements. This range is validated for continuous operation in automotive under-hood environments and industrial power electronics. The sensor's accuracy remains ±1°C across this full span, with tighter tolerances (±0.25°C) in the 0°C to +70°C zone. Its thermal design leverages the VSSOP-8 package leads as the primary heat path to the PCB, ensuring localized measurement fidelity.
Does the TMP75CQDGKRQ1 support I²C fast-mode Plus (1 MHz)?
No, the TMP75CQDGKRQ1 does not support I²C fast-mode Plus (1 MHz). It operates in standard fast-mode up to 400 kHz and high-speed (Hs) mode up to 3 MHz - but only when initiated by an SMBus Hs-mode master code (00001xxx). In standard I²C implementations without SMBus Hs-mode capability, the maximum supported clock frequency is 400 kHz. The device's timing parameters (e.g., t(HIGH) = 600 ns min) align with SMBus 3.0, not I²C fast-mode Plus.
How many TMP75CQDGKRQ1 devices can share the same two-wire bus?
Up to eight TMP75CQDGKRQ1 devices can share the same two-wire bus. This is achieved using the three hardware address pins (A0, A1, A2), each configurable as GND or VS to generate unique 7-bit slave addresses in the 1001xxx format. The address is latched at the start of each communication, allowing mixed configurations on one bus. No software address reconfiguration is needed - addressing is fully static and pin-driven, simplifying multi-sensor thermal mapping in compact systems.
What is the function of the ALERT pin on the TMP75CQDGKRQ1?
The ALERT pin on the TMP75CQDGKRQ1 is an open-drain output that signals overtemperature events based on programmable THIGH and TLOW register thresholds. It operates in either comparator mode (TM = 0, default) - asserting when temperature ≥ THIGH and clearing only after falling below TLOW - or interrupt mode (TM = 1), where it stays asserted until any register is read. Polarity is set via the POL bit, supporting active-low or active-high logic. This enables direct connection to MCU interrupts or hardware shutdown circuits without polling.
Is the TMP75CQDGKRQ1 pin-compatible with the NCT75 and ADT75?
Yes, the TMP75CQDGKRQ1 is pin- and register-compatible with the NCT75 and ADT75, as explicitly stated in TI's SBOS840 datasheet. All three devices use identical SOIC-8 and VSSOP-8 footprints, matching pin assignments (e.g., SDA on pin 1, ALERT on pin 3, VS on pin 8), and identical register maps including configuration, temperature, THIGH, and TLOW addresses. This allows direct hardware replacement in existing NCT75/ADT75 designs while adding AEC-Q100 qualification and improved accuracy - no PCB or firmware changes required.
TMP75CQDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SMBus
- Voltage - Supply:
- 1.4V ~ 3.6V
- Resolution:
- 12 b
- Features:
- One-Shot, Shutdown Mode
- Accuracy - Highest (Lowest):
- ±0.25°C (±1°C )
- Test Condition:
- 0°C ~ 70°C (-40°C ~ 125°C)
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 8-VSSOP
TMP75CQDGKRQ1 FAQ
1.How can I place an order for TMP75CQDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP75CQDGKRQ1 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 TMP75CQDGKRQ1 reliable?
The price and inventory of TMP75CQDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP75CQDGKRQ1 is usually 5 days.
3.What payment methods are accepted for TMP75CQDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP75CQDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP75CQDGKRQ1?
TMP75CQDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP75CQDGKRQ1 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 TMP75CQDGKRQ1?
For technical support, including TMP75CQDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP75CQDGKRQ1 requirements.
6.How does Aetrix verify that TMP75CQDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All TMP75CQDGKRQ1 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 TMP75CQDGKRQ1 meets industry standards.
7.What is the process for return or replacement of TMP75CQDGKRQ1?
All TMP75CQDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP75CQDGKRQ1, 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 TMP75CQDGKRQ1 part is unused and in its original packaging.
Return procedure for TMP75CQDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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