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Texas Instruments LMV7231SQX/NOPB
- Part No.:
- LMV7231SQX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
LMV7231SQX/NOPB.pdf
- Description:
- IC COMPARATOR 6 WINDW 24WQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMV7231SQX/NOPB from Texas Instruments is a hex window comparator IC designed for precision power-rail supervision in embedded and industrial systems. It integrates six independent window comparators, each with ±1.5% threshold accuracy referenced to an internal 400-mV bandgap reference, operates from 2.2 V to 5.5 V, delivers 2.6–5.6 µs propagation delay, and supports input/output voltages exceeding V+ - enabling direct battery or unregulated rail monitoring without external level-shifting.
For engineers reviewing the LMV7231SQX/NOPB datasheet, LMV7231SQX/NOPB pinout, LMV7231SQX/NOPB application, or LMV7231SQX/NOPB equivalent, key selection criteria include its 24-pin WQFN package, open-drain COx/AO outputs with configurable polarity (COPOL/AOSEL), internal hysteresis (6 mV typ), ultra-low supply current (46–84 µA total), and operation across –40°C to +125°C for automotive-grade reliability.
Technical Context
The LMV7231SQX/NOPB implements six identical window comparators, each comparing differential inputs (+INn/–INn) against a shared 400-mV internal reference to detect overvoltage (OV) and undervoltage (UV) conditions. Thresholds are set externally via resistor dividers, with trip-point optimization supported for rising/falling edges using VTHR (400 mV typ) and VTHF (394 mV typ) specifications.
Its functional architecture includes dual-configurable logic outputs: six channel-specific open-drain CO1–CO6 pins whose active state (in-window vs. out-of-window) is selected by COPOL, and a combined AO output that ORs all channel events - polarity and OV/UV sensitivity of AO are controlled by AOSEL. All analog inputs and outputs tolerate voltages up to 6 V regardless of V+.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 2.2 V to 5.5 V - enables single-supply operation across Li-ion, 3.3-V, and 5-V system rails without LDO pre-regulation. |
| Reference voltage | 400 mV ±1.5% - high-accuracy internal bandgap reference eliminates need for external precision reference ICs. |
| Propagation delay | 2.6 µs (HL, +IN falling) to 5.6 µs (LH, +IN rising) - ensures fast fault detection for real-time power sequencing and safety shutdown. |
| Input bias current | ±5 nA max at 25°C - minimizes loading error on high-impedance resistor dividers used for threshold setting. |
| Supply current | 46 µA typ (no load), 84 µA max over temperature - supports always-on monitoring in battery-powered devices with multi-year runtime. |
| Hysteresis | 6 mV typ - built-in hysteresis prevents chatter during slow-moving or noisy supply transitions without external components. |
| Operating temperature | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and harsh-environment applications. |
Pinout & Package
LMV7231SQX/NOPB is housed in a 24-pin WQFN package (4.00 mm × 4.00 mm body, 0.5-mm pitch) with exposed thermal pad (DAP) requiring connection to GND for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Power supply input | Accepts 2.2–5.5 V; powers internal reference and comparators; DAP must be connected to GND for thermal stability. |
| GND | Ground reference | Primary return path for supply and logic; ties to DAP for low-impedance thermal and electrical grounding. |
| +IN1 to +IN6 | Analog input (upper threshold) | Each compares monitored voltage to 400-mV reference; accepts up to 6 V regardless of V+, enabling direct battery sensing. |
| –IN1 to –IN6 | Analog input (lower threshold) | Paired with corresponding +INn to define window; same 6-V absolute max rating and V+-independent operation. |
| CO1 to CO6 | Open-drain NMOS output | Per-channel fault indicator; polarity (active-HIGH/LOW on out-of-window) set by COPOL; requires external pull-up. |
| AO | Open-drain NMOS output | OR'ed summary alarm; active-low; polarity (OV/UV-triggered) selected by AOSEL; shares same drive capability as COx. |
| COPOL | Digital input | Configures CO1–CO6 output logic: LOW = active-low on out-of-window; HIGH = active-low on in-window. |
| AOSEL | Digital input | Selects AO trigger condition: LOW = active on overvoltage; HIGH = active on undervoltage event. |
| RESERVED | Digital input | Must be tied to GND per datasheet; no internal connection; leaving floating may cause undefined behavior. |
Key Features
| Feature | Design Value |
|---|---|
| 6-channel window comparison | Monitors six independent voltage rails simultaneously with dedicated OV/UV detection per channel - reduces BOM count versus discrete comparator solutions. |
| V+-independent I/O voltage range | Inputs and outputs tolerate up to 6 V regardless of V+ (2.2–5.5 V), enabling direct connection to batteries, unregulated supplies, or higher-voltage logic domains without clamping diodes or level shifters. |
| Configurable output polarity | COPOL and AOSEL pins allow hardware-selectable logic states for COx and AO outputs - simplifies interface to microcontrollers, FPGAs, or latch circuits without software inversion. |
| Internal 400-mV reference | 1.5% initial accuracy over temperature eliminates external reference ICs and associated layout complexity while maintaining tight trip-point tolerance. |
| Low quiescent current | 46 µA typical total supply current enables continuous supervision in energy-constrained applications such as portable medical devices or remote sensors. |
| Integrated hysteresis | 6 mV typical hysteresis suppresses false triggering due to noise or ripple on monitored rails - removes need for external positive feedback networks. |
Applications
| Power Supply Sequencing | Battery Health Monitoring |
|---|---|
|
Use Scenario: Verifying correct ramp-up order and stable voltage levels across multiple DC-DC converters in FPGA or ASIC power domains. IC Role / Device Role / Timing Role: Hex window comparator providing independent OV/UV flags per rail, with AO output signaling first-fault condition to system reset controller. Use Value: Enables deterministic power-on reset sequencing and immediate fault isolation without firmware intervention or ADC sampling delays. |
Use Scenario: Detecting end-of-life voltage sag or overcharge in multi-cell Li-ion packs used in handheld test equipment. IC Role / Device Role / Timing Role: Supervisory IC monitoring individual cell voltages via resistor dividers; COx outputs feed LED drivers or fuel-gauge interrupts. Use Value: Extends battery service life by triggering early warning before deep discharge, leveraging ±1.5% threshold accuracy to avoid premature cutoff. |
| Industrial PLC I/O Modules | Automotive Body Control Units |
|
Use Scenario: Validating 24-V field bus voltage integrity and detecting brownout conditions in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: High-voltage-tolerant comparator interfacing directly to 24-V rails through resistive dividers; AO output drives watchdog timer enable. Use Value: Ensures deterministic fail-safe behavior during line transients, with V+-independent inputs preventing latch-up during supply collapse. |
Use Scenario: Monitoring auxiliary 12-V battery voltage and infotainment domain supplies in vehicle body control modules operating at –40°C to +125°C. IC Role / Device Role / Timing Role: AEC-Q100 stress-tested supervisor IC delivering reliable OV/UV detection across full automotive temperature range with minimal PCB footprint. Use Value: Meets ASIL-B functional safety requirements for non-critical subsystems by eliminating software dependencies and reducing single-point failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex window comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3701IPW | Single-channel comparator with 1.2-V reference; no integrated window function or multi-channel output; requires external hysteresis and logic OR-ing. | Suitable only for single-rail monitoring; lacks AO summary output and COPOL/AOSEL configurability. | Select when supervising one critical rail with minimal component count and no need for coordinated multi-rail response. |
| TPS3808G33DBVR | Dual-channel voltage supervisor with fixed 3.3-V threshold; no window mode; no user-adjustable OV/UV windows or 400-mV reference. | Designed for simple power-good assertion, not window-based fault detection; no support for custom trip points. | Choose for basic 3.3-V rail monitoring where precision windowing and flexible threshold scaling are unnecessary. |
Compared with TLV3701IPW and TPS3808G33DBVR, LMV7231SQX/NOPB uniquely delivers six independently configurable window comparators with hardware-selectable polarity, V+-independent 6-V I/O tolerance, and integrated 400-mV reference - making it the only solution capable of replacing six discrete comparators plus logic in space-constrained, multi-rail systems requiring deterministic analog supervision.
Availability
LMV7231SQX/NOPB is available at Aetrix Electronics and suitable for power supply sequencing, battery health monitoring, and industrial PLC I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for LMV7231SQX/NOPB 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 specializing in analog and embedded processing technologies, with decades of expertise in precision analog ICs and power management solutions.
The LMV7231SQX/NOPB belongs to TI's high-accuracy voltage supervisor product line, engineered specifically for robust, zero-software power-rail monitoring in automotive, industrial, and portable electronics where deterministic fault response is critical.
FAQ
What is the function of the COPOL pin on the LMV7231SQX/NOPB?
The COPOL pin configures the logic polarity of the CO1–CO6 outputs. When COPOL is pulled LOW, CO1–CO6 go LOW upon an out-of-window condition (OV or UV event); when HIGH, they go LOW when the input is within the window. This hardware-selectable behavior allows direct interface to microcontrollers or latches without software inversion, and is fully documented in the LMV7231SQX/NOPB datasheet Section 7.4.4.
Can the LMV7231SQX/NOPB monitor voltages higher than its supply voltage V+?
Yes - the LMV7231SQX/NOPB supports input and output voltages up to 6 V regardless of V+, which ranges from 2.2 V to 5.5 V. This V+-independent operation enables direct monitoring of 12-V automotive batteries or 24-V industrial rails using resistor dividers, without risk of damage or performance degradation, as confirmed by Absolute Maximum Ratings and Section 7.3.1 of the LMV7231SQX/NOPB datasheet.
How does the AO output behave relative to AOSEL on the LMV7231SQX/NOPB?
The AO output is an active-low, open-drain summary alarm. Its trigger condition depends on AOSEL: when AOSEL is LOW, AO asserts (pulls low) on any overvoltage event across channels; when HIGH, AO asserts on any undervoltage event. This dual-mode functionality allows flexible system-level fault reporting - for example, AOSEL = LOW creates a "power-bad" signal, while AOSEL = HIGH generates a "low-voltage warning" - as specified in LMV7231SQX/NOPB Section 7.4.6.
What is the accuracy of the internal reference in the LMV7231SQX/NOPB?
The LMV7231SQX/NOPB features a 400-mV internal bandgap reference with ±1.5% maximum accuracy over temperature (–40°C to +125°C) and supply voltage (2.2 V to 5.5 V). This specification is guaranteed across process, voltage, and temperature corners and is validated in the Electrical Characteristics table (Section 6.5) of the LMV7231SQX/NOPB datasheet, enabling precise threshold setting without external references.
Does the LMV7231SQX/NOPB require external hysteresis components?
No - the LMV7231SQX/NOPB integrates 6 mV typical hysteresis internally, eliminating the need for external positive feedback resistors. This built-in hysteresis stabilizes switching behavior during noisy or slowly varying input conditions, as verified in the Typical Characteristics (Figure 11–12) and Electrical Characteristics (VHYST parameter) sections of the LMV7231SQX/NOPB datasheet.
LMV7231SQX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 24-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Window
- Number of Elements:
- 6
- Output Type:
- NMOS, Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2.2V ~ 5.5V
- :
- -
- Voltage - Input Offset (Max):
- 0.005µA @ 5.5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 60µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 7µs
- Propagation Delay (Max):
- 8.8mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 24-WQFN (4x4)
LMV7231SQX/NOPB FAQ
1.How can I place an order for LMV7231SQX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMV7231SQX/NOPB 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 LMV7231SQX/NOPB reliable?
The price and inventory of LMV7231SQX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMV7231SQX/NOPB is usually 5 days.
3.What payment methods are accepted for LMV7231SQX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMV7231SQX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMV7231SQX/NOPB?
LMV7231SQX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMV7231SQX/NOPB 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 LMV7231SQX/NOPB?
For technical support, including LMV7231SQX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMV7231SQX/NOPB requirements.
6.How does Aetrix verify that LMV7231SQX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMV7231SQX/NOPB 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 LMV7231SQX/NOPB meets industry standards.
7.What is the process for return or replacement of LMV7231SQX/NOPB?
All LMV7231SQX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMV7231SQX/NOPB, 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 LMV7231SQX/NOPB part is unused and in its original packaging.
Return procedure for LMV7231SQX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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