Texas Instruments LMV7239M5X

Overview

LMV7239M5X from Texas Instruments is a rail-to-rail input, push-pull output voltage comparator optimized for ultra-low-power, high-speed operation in 2.7-V to 5.5-V single-supply systems. It delivers 75 ns propagation delay at 5 V with only 65 µA supply current, supports ±200 mV beyond-rail input common-mode range (–0.2 V to 5.2 V), and drives loads directly without external pull-up - enabling use in battery-powered zero-crossing detectors and window comparators.

For engineers reviewing the LMV7239M5X datasheet, LMV7239M5X pinout, LMV7239M5X application, or LMV7239M5X equivalent, key selection criteria include its push-pull output architecture (vs. open-drain LMV7235), guaranteed 75-ns delay at 100-mV overdrive, rail-to-rail input stage enabling ground- and supply-referenced sensing, and SOT-23-5 packaging suitable for space-constrained portable designs.

Technical Context

The LMV7239M5X uses a complementary PNP/NPN input stage to achieve > rail-to-rail common-mode operation (–0.2 V to V_CC + 0.1 V), allowing direct sensing of signals below ground or above V_CC. Its push-pull output stage provides low-impedance sourcing (up to 55 mA) and sinking (up to 30 mA) capability at 5 V, eliminating external pull-up components required by open-drain variants like LMV7235.

Propagation delay remains stable across temperature (80–95 ns from –40°C to 85°C at 20-mV overdrive) and load capacitance (≤106 ns at 100 pF), with skew <1 ns between rising/falling edges. Input offset voltage is ±1 mV (typ) at 5 V, and CMRR reaches 67 dB - supporting precision threshold detection in noisy environments.

Key Specifications

Pinout & Package

LMV7239M5X is packaged in a 5-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size and standard JEDEC MO-178 footprint. Pin 1 is marked via dot; device orientation follows TI standard top-view labeling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV7235M5X, LMV7239M5X eliminates pull-up resistors and improves speed by 25%; compared with TLV3501DBVR, it reduces supply current by 98% at the cost of 16× longer propagation delay - making it optimal for battery-critical, medium-speed detection tasks.

Availability

LMV7239M5X is available at Aetrix Electronics and suitable for portable medical monitors, set-top box power sequencing, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LMV7239M5X 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 signal conditioning and low-power design.

The LMV7239M5X belongs to TI's LMV72xx ultra-low-power comparator family, engineered specifically for battery-operated instrumentation and portable electronics where nanosecond-speed detection must coexist with microamp-level quiescent current.

FAQ

What is the maximum operating temperature for LMV7239M5X?

The LMV7239M5X is specified for operation from –40°C to +85°C ambient temperature per its Recommended Operating Conditions. Junction temperature must not exceed 150°C; thermal resistance θ_JA is 265°C/W in the SOT-23-5 (DBV) package. At 85°C ambient and 65 µA supply current, self-heating remains negligible - ensuring reliable performance in sealed enclosures or hot industrial environments. LMV7239M5X maintains 95-ns propagation delay at 85°C.

Does LMV7239M5X support dual-supply operation?

Yes, LMV7239M5X supports dual-supply operation with V₊ and V₋ pins, though it is primarily optimized for single-supply use. The absolute maximum supply voltage is 6 V (V₊ – V₋), and the input common-mode range extends 200 mV beyond each rail - enabling ±2.5-V operation with inputs from –2.7 V to +2.7 V. However, TI's datasheet emphasizes single-supply applications; LMV7239M5X performance metrics (e.g., 75-ns delay, 65-µA current) are characterized at 2.7–5.5 V single supply.

Can LMV7239M5X drive a 10-kΩ load directly?

Yes, LMV7239M5X can drive a 10-kΩ load directly. Its push-pull output delivers VOH ≥ V_CC – 0.15 V (at 4-mA sink) and VOL ≤ 350 mV (at 4-mA source) at 5 V supply - resulting in <1% error when interfacing with standard TTL/CMOS logic thresholds. For heavier loads (e.g., 1-kΩ), output swing degrades slightly but remains functional. LMV7239M5X does not require external buffering for typical logic-level interfacing, unlike open-drain comparators such as LMV7235M5X.

What is the input bias current specification for LMV7239M5X?

The input bias current for LMV7239M5X is 30 nA (min), 400 nA (typ), and 600 nA (max) across temperature (–40°C to +85°C) at 5 V supply. This low bias current minimizes voltage errors in high-impedance sensor interfaces - for example, a 1-MΩ source impedance introduces only 0.4 mV offset (400 nA × 1 MΩ). Input bias current remains stable across the full common-mode range and is matched between IN⁺ and IN⁻ inputs, supporting precision differential sensing.

Is LMV7239M5X pin-compatible with LMV7235M5X?

Yes, LMV7239M5X and LMV7235M5X share identical 5-pin SOT-23 (DBV) and SC70 (DGK) packages and pinout: Pin 1 = V_OUT, Pin 2 = V₋, Pin 3 = IN⁺, Pin 4 = IN⁻, Pin 5 = V₊. This allows direct PCB replacement in existing layouts. However, LMV7235M5X has open-drain output requiring external pull-up, while LMV7239M5X has push-pull output - so firmware or downstream logic may need verification to ensure compatibility with the active-high/active-low behavior change.