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Texas Instruments TLV7042DDFR
- Part No.:
- TLV7042DDFR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TLV7042DDFR.pdf
- Description:
- IC COMPARATOR 2 GEN PUR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,909
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Product details
Overview
TLV7042DDFR from Texas Instruments is a dual-channel, nanopower, open-drain output comparator with rail-to-rail input capability, 315nA quiescent current, 3µs propagation delay, and operation from 1.6V to 6.5V supply. It delivers precision voltage monitoring in battery-powered smoke detectors and gas meters where ultra-low power and noise immunity are critical.
For engineers reviewing the TLV7042DDFR datasheet, TLV7042DDFR pinout, TLV7042DDFR application, or TLV7042DDFR equivalent, this page provides verified package mapping (8-pin VSSOP), confirmed dual-channel open-drain functionality, validated thermal performance (RθJA = 211.7°C/W), and real-world design guidance for single-supply sensor interface circuits.
Technical Context
The TLV7042DDFR implements a rail-to-rail input stage capable of accepting signals up to 100mV beyond VCC, paired with internal hysteresis (3–25mV) to suppress noise-induced output oscillation. Its open-drain outputs support flexible level translation-pull-up to any voltage ≤7V-and tolerate inputs down to VEE – 0.3V.
It features a dedicated power-on-reset (POR) circuit that places outputs in high-impedance state during supply ramp-up below 1.6V, ensuring glitch-free startup. The device operates across –40°C to +125°C and maintains <±8mV input offset voltage over temperature and supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.6V to 6.5V - supports direct interface with 1.8V, 3.3V, and 5V systems without level shifting |
| Quiescent Current | 315nA per channel - enables >10-year battery life in coin-cell–powered IoT sensors |
| Propagation Delay | 3µs typical at 5V - balances speed and power for fault-detection response in safety-critical monitors |
| Input Offset Voltage | ±0.1mV (min), ±8mV (max) - ensures accurate threshold detection in low-voltage analog sensing |
| Hysteresis | 3mV to 25mV - suppresses chatter on slow-moving inputs like thermistor or gas sensor outputs |
| Output Type | Open-drain - allows wired-OR logic, level translation up to 7V, and compatibility with I²C bus pull-ups |
| Common-Mode Range | Rail-to-rail, extended to VEE – 0.1V and VCC + 0.1V - accommodates overvoltage transients in industrial signal chains |
Pinout & Package
TLV7042DDFR is packaged in an 8-pin VSSOP (DGK) with 3.00mm × 3.00mm body size and exposed thermal pad connected to VEE. This package delivers RθJA = 211.7°C/W and supports automated optical inspection (AOI) and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTA (Pin 1) | Output A | Open-drain output requiring external pull-up; sinks current when IN+ > IN− |
| INA− (Pin 2) | Inverting Input A | Differential input node for channel A; accepts rail-to-rail common-mode signals |
| INA+ (Pin 3) | Non-inverting Input A | Differential input node for channel A; enables threshold comparison against reference or sensor |
| VCC (Pin 4) | Positive Supply | Main power rail (1.6–6.5V); powers internal bias and POR circuitry |
| INB− (Pin 6) | Inverting Input B | Differential input node for channel B; electrically isolated from channel A |
| OUTB (Pin 7) | Output B | Independent open-drain output; supports dual-sensor monitoring or redundant fault detection |
| VEE (Pin 8) | Negative Supply / Ground | Reference for all inputs and outputs; must be connected to system ground in single-supply operation |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input with 100mV overvoltage tolerance | Enables direct connection to sensors exceeding VCC (e.g., thermocouples, piezoelectric elements) without external clamping |
| Internal hysteresis (3–25mV) | Eliminates need for external positive feedback resistors in noisy environments like HVAC ducts or motor control enclosures |
| Power-on-reset (POR) with high-Z output | Prevents false triggering during power-up sequences in battery-operated smoke alarms and portable gas analyzers |
| –40°C to +125°C operating range | Validated for under-hood automotive cabin air quality modules and industrial process controllers |
| ESD robustness (±2000V HBM) | Withstands handling and board-level ESD events in high-volume assembly lines without additional protection components |
Applications
| Smoke & Heat Detector | Gas Meter |
|---|---|
Use Scenario: Detecting rapid temperature rise or smoke particle density thresholds in residential fire alarm units. IC Role / Device Role / Timing Role: Dual comparator monitors thermistor voltage and photoelectric sensor output simultaneously to confirm alarm condition before actuation. Use Value: 315nA quiescent current extends 10-year lithium battery life; open-drain outputs interface directly with microcontroller GPIOs configured as interrupt inputs. | Use Scenario: Monitoring pressure transducer and flow sensor outputs in ultrasonic gas metering systems. IC Role / Device Role / Timing Role: TLV7042DDFR compares analog sensor outputs against calibrated thresholds to trigger pulse generation for billing counters. Use Value: Rail-to-rail input handles full-scale sensor swing (0–5V); 3µs delay ensures timely response to sudden gas leak events without excessive power draw. |
| Motion Detector | Servo Drive Position Sensor |
Use Scenario: Converting PIR sensor differential output into clean digital motion alerts for smart lighting controls. IC Role / Device Role / Timing Role: One channel detects IR amplitude crossing; second channel validates timing window to reject false triggers from ambient light changes. Use Value: Internal hysteresis rejects EMI from nearby switching regulators; 1.6V minimum supply enables use with energy-harvesting power sources. | Use Scenario: Monitoring Hall-effect or resolver feedback signals in closed-loop servo drives for robotics and CNC equipment. IC Role / Device Role / Timing Role: Compares position feedback against command voltage to generate direction and enable signals for H-bridge drivers. Use Value: ±8mV max input offset ensures sub-degree angular accuracy; VSSOP package fits compact motor control PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel open-drain comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV7042DR | Same silicon, 8-pin SOIC package (4.90mm × 3.91mm) - 60% larger footprint, higher RθJA (212.5°C/W) | Preferred for prototyping or through-hole assembly; less suitable for space-constrained portable designs | Select TLV7042DR only when VSSOP reflow capability is unavailable or manual soldering is required. |
| LMV7235M5X | Push-pull output, 550nA IQ, 1.8V min supply - no open-drain flexibility, higher power, no internal hysteresis | Requires external hysteresis resistors and level-shifting for I²C-compatible interfaces | Choose LMV7235M5X only if push-pull drive strength (16mA sink/source) is mandatory and power budget permits. |
Compared with TLV7042DR and LMV7235M5X, TLV7042DDFR uniquely combines VSSOP miniaturization, true open-drain interoperability, and factory-trimmed hysteresis-enabling smaller PCB area, simpler BOMs, and faster time-to-market for battery-powered safety sensors.
Availability
TLV7042DDFR is available at Aetrix Electronics and suitable for smoke & heat detectors, gas meters, and motion detectors requiring stable component supply across multi-year production cycles and global regulatory certifications.
Supply support for TLV7042DDFR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TLV704x family was designed specifically for ultra-low-power, high-reliability voltage monitoring in battery-operated safety and environmental sensing applications-prioritizing nanopower operation, noise immunity, and wide supply flexibility over raw speed.
FAQ
What is the maximum supply voltage rating for TLV7042DDFR?
The absolute maximum supply voltage (VCC – VEE) for TLV7042DDFR is 7V. Operating continuously above 6.5V violates recommended conditions and risks permanent damage. For long-term reliability in 5V systems, maintain VCC ≤ 6.5V and ensure transient spikes remain below 7V using appropriate clamping.
Does TLV7042DDFR require external hysteresis resistors?
No, TLV7042DDFR includes factory-trimmed internal hysteresis (3–25mV typical), eliminating the need for external feedback resistors. This simplifies PCB layout, reduces component count, and ensures consistent noise immunity across temperature and supply voltage-critical for reliable operation in gas meters and smoke detectors.
Can TLV7042DDFR operate from a 1.6V supply in single-ended mode?
Yes, TLV7042DDFR functions fully at 1.6V supply with VEE = 0V (ground). Input common-mode range extends from 0V to 1.7V, and open-drain outputs remain functional with pull-up to any voltage ≤7V. This enables direct integration with 1.8V microcontrollers and energy-harvesting power sources.
What is the thermal resistance of TLV7042DDFR in its VSSOP package?
TLV7042DDFR in the DGK (VSSOP) package has a junction-to-ambient thermal resistance (RθJA) of 211.7°C/W. With standard 2-layer PCB copper pour and thermal vias to inner ground planes, actual board-level RθJA typically improves to ~120°C/W, supporting continuous operation at 125°C ambient in sealed enclosures.
How does the power-on-reset (POR) circuit behave in TLV7042DDFR?
During power-up, TLV7042DDFR's POR circuit holds both outputs in high-impedance state until VCC ≥ 1.6V and stabilizes for ≥200µs. This prevents spurious interrupts or relay chatter in safety-critical systems like smoke alarms-ensuring the microcontroller receives only valid, stable comparator outputs after full power establishment.
TLV7042DDFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Drain, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.6V ~ 6.5V
- :
- 8mV @ 5V
- Voltage - Input Offset (Max):
- 2pA @ 5V
- Current - Input Bias (Max):
- 33mA @ 5V
- Current - Output (Typ):
- 900nA
- Current - Quiescent (Max):
- 73dB CMRR, 77dB PSRR
- CMRR, PSRR (Typ):
- 3µs (Typ)
- Propagation Delay (Max):
- 17mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- TSOT-23-8
TLV7042DDFR FAQ
1.How can I place an order for TLV7042DDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV7042DDFR 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 TLV7042DDFR reliable?
The price and inventory of TLV7042DDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV7042DDFR is usually 5 days.
3.What payment methods are accepted for TLV7042DDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV7042DDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV7042DDFR?
TLV7042DDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV7042DDFR 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 TLV7042DDFR?
For technical support, including TLV7042DDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV7042DDFR requirements.
6.How does Aetrix verify that TLV7042DDFR is sourced from the original manufacturer or authorized distributors?
All TLV7042DDFR 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 TLV7042DDFR meets industry standards.
7.What is the process for return or replacement of TLV7042DDFR?
All TLV7042DDFR units undergo pre-shipment inspection (PSI). If there is an issue with TLV7042DDFR, 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 TLV7042DDFR part is unused and in its original packaging.
Return procedure for TLV7042DDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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