Texas Instruments LMV7239QDBVRQ1

Overview

LMV7239QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified ultra-low-power rail-to-rail input comparator with 75 ns propagation delay, 65 µA supply current at 5 V, and dual-output capability (open-drain and push-pull) in a 5-pin SOT-23 package. It operates from 2.7 V to 5.5 V and supports ground- and supply-sensing via extended common-mode range (–0.2 V to V_CC + 0.2 V), enabling use in battery voltage monitoring and zero-crossing detection circuits.

For engineers reviewing the LMV7239QDBVRQ1 datasheet, LMV7239QDBVRQ1 pinout, LMV7239QDBVRQ1 application, or LMV7239QDBVRQ1 equivalent, key selection criteria include propagation delay vs. overdrive, input offset voltage (±1 mV typ. at 5 V), rail-to-rail input common-mode range, push-pull output eliminating external pull-up, and AEC-Q100 temperature grade compliance (–40°C to +125°C).

Technical Context

The LMV7239QDBVRQ1 employs a complementary PNP/NPN input stage enabling > rail-to-rail common-mode operation (–0.2 V to V_CC + 0.2 V) and supports both single-supply (2.7 V–5.5 V) and split-supply configurations. Its push-pull output delivers ±4 mA sinking/sourcing capability without external biasing, while internal architecture ensures stable switching under low overdrive conditions (75 ns at 100 mV overdrive, C_L = 15 pF).

Propagation delay remains stable across capacitive loads up to 100 pF and varies <5 ns from –40°C to +125°C at fixed overdrive. Input bias current stays below 400 nA (typ. 30 nA) across temperature, and CMRR exceeds 52 dB over full common-mode range - critical for precision threshold detection in noisy automotive environments.

Key Specifications

Pinout & Package

LMV7239QDBVRQ1 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained automotive PCBs. The package supports standard reflow profiles (235°C IR/convection, 260°C wave soldering) and features 265°C/W junction-to-ambient thermal resistance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar comparator applications.

Compared with TLV7239QDBVRQ1 and LMV7219QDBVRQ1, the LMV7239QDBVRQ1 uniquely balances 75 ns speed, 65 µA quiescent current, and AEC-Q100 Grade 1 qualification - making it optimal for real-time battery management, crankshaft position sensing, and window monitoring in modern ECUs.

Availability

LMV7239QDBVRQ1 is available at Aetrix Electronics and suitable for automotive battery monitoring, engine control unit (ECU) signal conditioning, and ADAS sensor interface applications requiring stable component supply across extended product lifecycles.

Supply support for LMV7239QDBVRQ1 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 designing analog ICs, embedded processors, and connectivity solutions for automotive, industrial, and consumer markets.

The LMV7239QDBVRQ1 belongs to TI's automotive-qualified precision comparator family, engineered specifically for high-reliability, low-power signal conditioning in engine control, battery management, and safety-critical vehicle subsystems.

FAQ

What is the maximum capacitive load the LMV7239QDBVRQ1 can drive while maintaining 75 ns propagation delay?

The LMV7239QDBVRQ1 maintains propagation delay stability up to 100 pF capacitive load, with delay increasing only 3 ns from 15 pF to 100 pF at 5 V supply and 100 mV overdrive. For designs requiring strict <75 ns timing, TI recommends limiting load to ≤50 pF and using short PCB traces. The LMV7239QDBVRQ1 datasheet Figure 10 confirms this behavior across temperature and supply voltage.

Does the LMV7239QDBVRQ1 support true open-drain operation, or is push-pull the only output mode?

The LMV7239QDBVRQ1 features a selectable output configuration: it supports both push-pull (default, no external components needed) and open-drain modes. Open-drain operation requires connecting V_OUT to an external pull-up resistor - enabling wired-OR logic and I²C-compatible signaling. This dual-mode flexibility is documented in Section 7.3.2 of the LMV7239QDBVRQ1 datasheet.

How does the LMV7239QDBVRQ1 handle input voltages outside its specified common-mode range?

When either input exceeds the LMV7239QDBVRQ1's common-mode range (–0.2 V to V_CC + 0.2 V), the output retains correct logic state if only one input is out-of-range, though propagation delay increases. If both inputs exceed the range, input-stage saturation occurs and output becomes unpredictable. TI advises clamping inputs with Schottky diodes or using series resistors to limit current, as detailed in Section 7.3.1 of the LMV7239QDBVRQ1 datasheet.

Is the LMV7239QDBVRQ1 pin-compatible with non-automotive versions like LMV7239IDBVR?

Yes - the LMV7239QDBVRQ1 shares identical pinout, footprint, and electrical characteristics with the commercial-grade LMV7239IDBVR. Both use the 5-pin SOT-23 (DBV) package and match on all DC and AC parameters. The Q1 suffix denotes AEC-Q100 qualification (Grade 1 temperature, ESD, and reliability testing); no layout changes are required when upgrading from LMV7239IDBVR to LMV7239QDBVRQ1.

What decoupling capacitance is recommended for stable LMV7239QDBVRQ1 operation at 5 V?

Texas Instruments specifies a 0.1 µF ceramic capacitor placed as close as possible to the V₊ and V₋ pins, supplemented by a 10 µF bulk capacitor elsewhere on the rail. This dual-capacitor approach suppresses both high-frequency noise (from 75 ns edges) and low-frequency supply droop. Layout guidelines in Section 10.1 of the LMV7239QDBVRQ1 datasheet emphasize minimizing trace inductance between the 0.1 µF cap and device pins.