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Texas Instruments TLV1854PWR
- Part No.:
- TLV1854PWR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLV1854PWR.pdf
- Description:
- 40V NANOPOWER QUAD COMPARATOR WI
- Quantity:
- Payment:
- Shipping:
Inventory:2,980
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Product details
Overview
TLV1854PWR from Texas Instruments is a quad-channel nanopower comparator with push-pull outputs, designed for voltage and temperature monitoring in always-on, low-power systems. It operates from 1.8V to 40V supply, draws only 440nA per channel, supports over-the-rail inputs up to 40V above V−, and features power-on reset for reliable startup in battery-powered gas detectors and motion sensors.
For engineers reviewing the TLV1854PWR datasheet, TLV1854PWR pinout, TLV1854PWR application, or TLV1854PWR equivalent, key selection criteria include its 40V input tolerance, fail-safe high-impedance inputs during undervoltage, 2.8mV internal hysteresis, and TSSOP-14 package compatibility with space-constrained industrial sensing nodes.
Technical Context
The TLV1854PWR implements a fail-safe input stage with ESD clamps and snapback protection, enabling robust operation when inputs exceed V+ by up to 40V - independent of supply voltage. Its internal power-on reset circuit holds output in a known state until VS ≥ 1.5V, preventing false triggers during brownout or cold-start conditions.
It uses a rail-to-rail input architecture with two distinct common-mode regions: low-CM (0V to V+ −1V, <1pA bias) and over-the-rail (>V+, ~55nA bias). The push-pull output drives both high and low without external pull-ups, supporting direct MOSFET gate control and LED indication in housekeeping circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 40V - enables direct interface with 12V/24V/36V industrial rails and single-cell Li-ion without level-shifting |
| Quiescent Current | 440nA per channel - allows years of operation on coin-cell batteries in smoke detectors or portable gas meters |
| Input Common-Mode Range | 0V to 40V referenced to V− - supports sensing of unregulated battery voltages or high-side current shunts without attenuation |
| Input Offset Voltage | ±0.25mV typical - ensures accurate threshold detection in precision temperature monitoring with 10mV hysteresis margin |
| Propagation Delay | 13µs (high-to-low, 100mV overdrive) - sufficient for slow-varying housekeeping signals like battery voltage decay or thermal ramp detection |
| Power-On Reset Threshold | VPOR = 1.5V - guarantees clean output initialization before MCU or supervisor IC becomes active |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive modules and industrial motor drive position feedback |
Pinout & Package
TSSOP-14 package (4.40mm × 5.00mm), thermally enhanced for PCB-level heat dissipation in compact sensor modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 (Pin 1) | Comparator 1 output | Push-pull driver capable of sourcing/sinking; no external pull-up required for logic-level interfacing |
| IN1− (Pin 2) | Inverting input 1 | High-impedance node tolerant to –0.1V to 40V; failsafe during V+ undervoltage |
| IN1+ (Pin 3) | Non-inverting input 1 | Same over-the-rail capability as IN1−; differential pair enables precise reference comparison |
| V+ (Pin 4) | Positive supply | Accepts 1.8V–40V; reverse-battery protected up to 40V across supply pins |
| IN2+ (Pin 5) | Non-inverting input 2 | Independent channel input; usable for dual-threshold detection (e.g., low/high battery warning) |
| IN2− (Pin 6) | Inverting input 2 | Matches IN1− specs; supports separate sensor signal routing without crosstalk |
| OUT2 (Pin 7) | Comparator 2 output | Electrically isolated push-pull output; may drive separate load or indicator LED |
| OUT3 (Pin 8) | Comparator 3 output | Third independent output; enables three-state monitoring (e.g., OK/WARN/FAULT) |
| IN3− (Pin 9) | Inverting input 3 | Valid over full 0V–40V range; suitable for high-side current sense amplifier output monitoring |
| IN3+ (Pin 10) | Non-inverting input 3 | Paired with IN3−; supports differential thermal sensor interfaces with noise immunity |
| V− (Pin 11) | Negative supply | Reference ground node; all inputs and outputs referenced to this pin; reverse-battery protected |
| IN4+ (Pin 12) | Non-inverting input 4 | Fourth channel input; enables multi-zone temperature monitoring in HVAC or server racks |
| IN4− (Pin 13) | Inverting input 4 | Full over-the-rail compliance; allows direct connection to unregulated auxiliary power rails |
| OUT4 (Pin 14) | Comparator 4 output | Final push-pull output; supports redundancy or voting logic in safety-critical subsystems |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe inputs | Remain high-impedance and functional even with V+ = 0V - eliminates need for input power sequencing in multi-rail systems |
| Over-the-rail input capability | Accepts inputs up to 40V above V− regardless of V+ value - enables direct high-voltage sensing without resistive dividers |
| Internal hysteresis | 2.8mV typical - suppresses noise-induced oscillation on slow-moving analog signals like thermistor outputs |
| Reverse battery protection | Withstands –40V supply reversal - prevents damage during field maintenance or incorrect battery installation |
| Power-on reset (POR) | Holds output stable until VS ≥ 1.5V - avoids spurious wake-up in ultra-low-power sleep modes |
Applications
| Gas Detector | Smoke & Heat Detector |
|---|---|
Use Scenario: Detects toxic gas concentration via electrochemical sensor output crossing preset thresholds. IC Role / Device Role / Timing Role: Quad comparator monitors multiple sensor channels and reference levels for alarm staging (pre-alarm, alarm, fault). Use Value: 40V input tolerance allows direct interface with unregulated sensor bias supplies; nanopower operation extends battery life to >5 years. | Use Scenario: Compares thermistor voltage against rising-temperature trip points in residential fire alarms. IC Role / Device Role / Timing Role: TLV1854PWR provides four independent comparators for dual-sensor validation and self-test logic. Use Value: Fail-safe inputs prevent false alarms during brownout; POR ensures deterministic startup after AC power restoration. |
| Motion Detector | Servo Drive Position Sensor |
Use Scenario: Processes PIR sensor output to trigger lighting or security systems based on ambient IR change. IC Role / Device Role / Timing Role: Comparator detects slow-rising envelope signal from PIR amplifier; hysteresis rejects EMI noise. Use Value: 440nA quiescent current enables battery-powered outdoor units with 3+ year shelf life; TSSOP-14 fits compact PCB layouts. | Use Scenario: Monitors absolute position feedback from resolver or Hall-effect sensors in closed-loop servo systems. IC Role / Device Role / Timing Role: TLV1854PWR compares analog position signals against safety limits and zero-crossing references. Use Value: –40°C to +125°C rating supports under-hood automotive applications; over-the-rail inputs accept raw resolver outputs up to 30Vpp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1864PWR | Open-drain output instead of push-pull; identical supply range, quiescent current, and over-the-rail input specs | Requires external pull-up for logic-high; enables wired-OR and level translation up to 40V | Select TLV1864PWR when interfacing with mixed-voltage microcontrollers or implementing fault-bus signaling |
| LMV339IPW | Higher quiescent current (38µA/channel); no over-the-rail input support; wider propagation delay (300ns) | Limited to within-rail sensing; unsuitable for high-side battery monitoring or reverse-battery environments | Choose LMV339IPW only if speed is critical and supply voltage stays strictly within 2.7V–5.5V |
Compared with TLV1864PWR, TLV1854PWR eliminates external pull-ups and simplifies board layout but lacks level translation; versus LMV339IPW, it delivers 86× lower power and 40V input resilience at the cost of slower response - making it optimal for always-on, high-voltage sensing where nanosecond timing is irrelevant.
Availability
TLV1854PWR is available at Aetrix Electronics and suitable for gas detection, smoke/heat alarm, motion sensing, and servo position monitoring requiring stable component supply across automotive, industrial, and consumer safety applications.
Supply support for TLV1854PWR 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 TLV185x family was engineered specifically for nanopower, high-voltage housekeeping functions - enabling reliable voltage, temperature, and fault monitoring in battery-backed and wide-input industrial systems.
FAQ
What is the maximum input voltage the TLV1854PWR can tolerate relative to V−?
The TLV1854PWR supports an input common-mode voltage range from –0.1V to 40V referenced to V−, meaning either input (IN+ or IN−) can safely exceed V+ by up to 40V. This over-the-rail capability is maintained across the full operating temperature range (–40°C to +125°C) and does not require external clamping diodes. The specification is validated per Absolute Maximum Ratings and confirmed in Section 5.1 and 5.4 of the official TI datasheet SNOSDE7B.
Does the TLV1854PWR require external pull-up resistors on its outputs?
No, the TLV1854PWR features push-pull outputs and does not require external pull-up resistors. Each of its four outputs can actively drive high or low, sourcing or sinking up to 2µA (typical) while maintaining VOL < 1mV and VOH < 1mV. This eliminates static power loss associated with pull-ups and simplifies design in battery-powered applications such as portable gas detectors where every nanoamp counts.
How does the power-on reset (POR) function in the TLV1854PWR?
The TLV1854PWR incorporates an internal POR circuit that holds all four outputs in a known state (determined by internal logic) until the supply voltage VS reaches 1.5V. This prevents erratic output transitions during power ramp-up or brownout events. Once VS ≥ 1.5V and stabilizes, the comparators begin normal operation with valid input-to-output response. The POR behavior is specified in Section 5.4 (Recommended Operating Conditions) and Section 6.4.1.2 of the TI datasheet.
Can unused comparator channels in the TLV1854PWR be left floating?
No - unused inputs must never be left floating or tied together. Doing so risks high-frequency oscillation due to the device's low offset and high bandwidth. Per TI's guidance in Section 6.4.1.3, each unused input should be biased within the valid common-mode range (0V to 40V w.r.t. V−) with ≥50mV differential - for example, grounding INx− and connecting INx+ to V+ or a stable reference. All four outputs may be left unconnected if unused.
Is the TLV1854PWR compatible with reverse battery connections?
Yes, the TLV1854PWR includes internal reverse battery protection rated up to 40V across the V+ and V− pins. This feature prevents damage during incorrect battery installation in field-deployed equipment such as handheld gas meters or wireless smoke detectors. The protection is implemented at the die level and does not rely on external components - verified in Absolute Maximum Ratings (Section 5.1) and Feature Description (Section 6.3) of the datasheet.
TLV1854PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Series:
- TLV185x
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 40V
- :
- 3.6mV @ 12V
- Voltage - Input Offset (Max):
- 250pA @ 12V
- Current - Input Bias (Max):
- 7mA @ 12V
- Current - Output (Typ):
- 750nA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 45µs (Typ)
- Propagation Delay (Max):
- 5mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-TSSOP
TLV1854PWR FAQ
1.How can I place an order for TLV1854PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1854PWR 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 TLV1854PWR reliable?
The price and inventory of TLV1854PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1854PWR is usually 5 days.
3.What payment methods are accepted for TLV1854PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1854PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1854PWR?
TLV1854PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1854PWR 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 TLV1854PWR?
For technical support, including TLV1854PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1854PWR requirements.
6.How does Aetrix verify that TLV1854PWR is sourced from the original manufacturer or authorized distributors?
All TLV1854PWR 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 TLV1854PWR meets industry standards.
7.What is the process for return or replacement of TLV1854PWR?
All TLV1854PWR units undergo pre-shipment inspection (PSI). If there is an issue with TLV1854PWR, 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 TLV1854PWR part is unused and in its original packaging.
Return procedure for TLV1854PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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