My Inquiry
My Account
Texas Instruments TLV1851QDBVRQ1
- Part No.:
- TLV1851QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TLV1851QDBVRQ1.pdf
- Description:
- AUTOMOTIVE, SINGLE NANOPOWER HIG
- Quantity:
- Payment:
- Shipping:
Inventory:1,765
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLV1851QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive nanopower comparator with push-pull output, 440 nA supply current per channel, 1.8 V to 40 V supply range, and over-the-rail input capability up to 40 V above V−. It delivers fail-safe operation during unpowered conditions and is used in voltage monitoring for always-on telematics eCall systems.
For engineers reviewing the TLV1851QDBVRQ1 datasheet, TLV1851QDBVRQ1 pinout, TLV1851QDBVRQ1 application, or TLV1851QDBVRQ1 equivalent, key selection criteria include its nanopower consumption, reverse-battery-protected inputs, power-on-reset behavior, and SOT-23-5 package compatibility with space-constrained automotive housekeeping circuits.
Technical Context
The TLV1851QDBVRQ1 implements a fail-safe input stage with internal ESD clamps referenced to V−, enabling robust operation when inputs exceed V+ by up to 40 V - independent of supply voltage. Its power-on-reset circuit holds output in a known state until supply reaches ≥1.5 V, preventing false triggers during power ramp-up or brownout.
It features internal hysteresis (2.8–5 mV typ) to suppress noise-induced oscillation and supports both low-common-mode (≤V+ − 1 V, <1 pA bias) and over-the-rail (>V+, ~55 nA bias) input operation. Input offset voltage is ±0.25 mV (typ), drift is 3 µV/°C, and propagation delay is 13–45 µs depending on overdrive and load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 40 V - enables direct use in 12 V and 24 V automotive battery systems without level-shifting. |
| Quiescent Current | 440 nA per channel - allows continuous monitoring in battery-backed systems with multi-year runtime. |
| Input Common-Mode Range | 0 V to 40 V above V− - supports sensing of high-side voltages (e.g., battery rail) even at low V+. |
| Power-On Reset Threshold | 1.5 V - ensures deterministic startup before logic-level thresholds are met in microcontroller wake-up circuits. |
| Input Offset Voltage | ±0.25 mV (typ) - enables accurate threshold detection for low-voltage signals like thermistor or shunt-based current sensing. |
| Propagation Delay | 13 µs (high overdrive, push-pull) - sufficient for slow housekeeping functions (e.g., battery undervoltage lockout) without excessive latency. |
| ESD Rating (HBM) | ±2000 V - meets AEC-Q100 stress requirements for automotive PCB handling and system integration. |
Pinout & Package
SOT-23-5 package (1.60 mm × 2.90 mm), surface-mount, lead-free, RoHS-compliant. Designed for automated placement and reflow in automotive control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Push-pull output | Drives loads directly (e.g., MCU interrupt line or LED) without external pull-up; sinks/sourcing capability avoids wasted quiescent current. |
| V− (Pin 2) | Negative supply | Reference node for all internal ESD clamps and input biasing; inputs remain functional even if V+ is unpowered. |
| IN+ (Pin 3) | Non-inverting input | Accepts signals up to 40 V above V− - usable for high-side sensing without attenuators or level shifters. |
| IN− (Pin 4) | Inverting input | Same over-the-rail capability as IN+; differential input tolerance supports wide common-mode rejection in noisy environments. |
| V+ (Pin 5) | Positive supply | Supplies internal bias; reverse-battery protection prevents damage if battery polarity is reversed up to 40 V. |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe inputs | High-impedance operation with no supply - eliminates need for power sequencing and prevents false triggering during cold-cranking. |
| Over-the-rail input range | 0 V to 40 V above V− - enables direct monitoring of battery voltage, alternator output, or 48 V subsystem rails without external components. |
| Reverse battery protection | Withstands −40 V on V+ relative to V− - protects against installation errors in automotive production and service environments. |
| Power-on-reset (POR) | Guarantees known output state until V+ ≥ 1.5 V - prevents spurious MCU wake-ups or relay chatter during ignition cycling. |
| No phase reversal | Maintains correct output polarity even under severe input overdrive - critical for safety-critical voltage supervision where output inversion could cause hazardous states. |
Applications
| Telematics eCall System Monitoring | Automotive Head Unit Power Sequencing |
|---|---|
Use Scenario: Continuous monitoring of backup battery voltage and main supply integrity in eCall modules that must remain operational after crash-induced main power loss. IC Role / Device Role / Timing Role: Nanopower voltage supervisor detecting undervoltage/overvoltage thresholds to trigger emergency call initiation or disable non-essential subsystems. Use Value: 440 nA quiescent current extends backup battery life to >5 years; over-the-rail inputs allow direct connection to 12 V battery without resistive dividers. | Use Scenario: Coordinating safe power-up and shutdown sequences between infotainment SoC, display driver, and audio amplifier in head units. IC Role / Device Role / Timing Role: Housekeeping comparator generating reset or enable signals based on rail stabilization status (e.g., 3.3 V LDO OK, 5 V USB OK). Use Value: POR ensures clean startup; fail-safe inputs tolerate transient glitches on enable lines during hot-plug events or CAN bus noise coupling. |
| Instrument Cluster Voltage Supervision | OBC & Wireless Charger Fault Detection |
Use Scenario: Real-time monitoring of multiple supply rails (e.g., 5 V MCU core, 12 V backlight, 3.3 V CAN transceiver) to detect brownout or overvoltage faults. IC Role / Device Role / Timing Role: Multi-threshold comparator feeding diagnostic flags to cluster MCU via GPIO or interrupt pin. Use Value: ±0.25 mV offset enables precise 1% threshold accuracy; 40 V input range covers both 12 V and 48 V architectures in next-gen clusters. | Use Scenario: Detecting abnormal conditions such as overtemperature, overcurrent, or isolation barrier failure in on-board chargers and wireless charging pads. IC Role / Device Role / Timing Role: Analog front-end comparator converting sensor outputs (e.g., NTC voltage, shunt voltage) into digital fault flags. Use Value: Reverse-battery protection prevents latch-up during service; nanopower operation allows always-on diagnostics without compromising charger efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1861QDBVRQ1 | Open-drain output instead of push-pull; identical supply range, current, and input specs. | Required when level translation (e.g., 3.3 V logic monitoring 12 V rail) or wired-OR functionality is needed. | Select TLV1861QDBVRQ1 only if external pull-up and logic-level flexibility outweigh the added quiescent current of the pull-up resistor. |
| LM7321QMA/NOPB | Higher supply current (1.3 mA), rail-to-rail input/output op-amp - not a comparator; requires external hysteresis network. | Used where adjustable threshold or analog amplification is required alongside comparison. | Choose LM7321QMA/NOPB only when comparator function must be implemented within a larger analog signal chain requiring gain or filtering. |
Compared with TLV1851QDBVRQ1, TLV1861QDBVRQ1 offers open-drain flexibility at the cost of external component dependency, while LM7321QMA/NOPB trades nanopower efficiency for analog versatility - making TLV1851QDBVRQ1 optimal for fixed-threshold, ultra-low-power automotive supervision.
Availability
TLV1851QDBVRQ1 is available at Aetrix Electronics and suitable for telematics eCall, instrument cluster, and OBC/wireless charger designs requiring stable component supply across automotive production lifecycles.
Supply support for TLV1851QDBVRQ1 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, embedded processing, and connectivity solutions for automotive, industrial, and personal electronics markets.
The TLV185x-Q1 product line was designed specifically for automotive housekeeping functions - delivering nanopower, fail-safe inputs, and AEC-Q100 compliance for always-on voltage, temperature, and fault monitoring in harsh environments.
FAQ
What is the maximum input voltage the TLV1851QDBVRQ1 can tolerate relative to V−?
The TLV1851QDBVRQ1 supports an input common-mode range from 0 V to 40 V above V−, meaning both IN+ and IN− can safely operate up to 40 V regardless of V+ value. This over-the-rail capability is enabled by internal ESD clamps referenced to V− and is validated per AEC-Q100 testing. Exceeding 40 V requires external protection.
Does the TLV1851QDBVRQ1 require external hysteresis for stable operation?
No - the TLV1851QDBVRQ1 integrates 2.8–5 mV typical internal hysteresis, eliminating the need for external feedback resistors. This built-in hysteresis stabilizes switching against noise in automotive environments, especially during slow-moving signals like battery voltage decay or thermistor-based temperature ramps.
Can the TLV1851QDBVRQ1 operate with V+ unpowered while inputs remain active?
Yes - the TLV1851QDBVRQ1 features fail-safe inputs that maintain high impedance and functional integrity even when V+ is 0 V or below minimum operating voltage. Inputs remain valid from −0.1 V to 40 V relative to V−, enabling reliable monitoring during power-down, cold-cranking, or supply sequencing faults.
What is the purpose of the Power-On Reset (POR) circuit in the TLV1851QDBVRQ1?
The POR circuit in the TLV1851QDBVRQ1 holds the output in a known logic state (determined by internal design) until V+ rises above 1.5 V. This prevents erratic or undefined outputs during power-up transients, ensuring clean initialization of downstream logic - critical for automotive safety mechanisms like eCall activation or fault flag assertion.
How does reverse battery protection work in the TLV1851QDBVRQ1?
The TLV1851QDBVRQ1 incorporates internal circuitry that blocks destructive current flow when V+ is reversed relative to V− (i.e., −40 V applied). This protection operates independently of input or output states and is verified per AEC-Q100 stress tests - safeguarding the device during improper battery installation in manufacturing or field service.
TLV1851QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- 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):
- 1µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 45µs (Typ)
- Propagation Delay (Max):
- 5mV
- Hysteresis:
- -40°C ~ 125°C (TA)
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- SOT-23-5
TLV1851QDBVRQ1 FAQ
1.How can I place an order for TLV1851QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV1851QDBVRQ1 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 TLV1851QDBVRQ1 reliable?
The price and inventory of TLV1851QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV1851QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for TLV1851QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV1851QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV1851QDBVRQ1?
TLV1851QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV1851QDBVRQ1 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 TLV1851QDBVRQ1?
For technical support, including TLV1851QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV1851QDBVRQ1 requirements.
6.How does Aetrix verify that TLV1851QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All TLV1851QDBVRQ1 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 TLV1851QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of TLV1851QDBVRQ1?
All TLV1851QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLV1851QDBVRQ1, 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 TLV1851QDBVRQ1 part is unused and in its original packaging.
Return procedure for TLV1851QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV1851QDBVRQ1 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
