Texas Instruments LMV7235M5X/NOPB

Overview

LMV7235M5X/NOPB from Texas Instruments is an ultra-low-power, rail-to-rail input comparator with open-drain output, 75 ns propagation delay at 5 V, 65 µA supply current, and −0.2 V to 5.2 V input common-mode range. It operates from 2.7 V to 5.5 V and is used in battery-powered zero-crossing detectors and level-shifting interfaces.

For engineers reviewing the LMV7235M5X/NOPB datasheet, LMV7235M5X/NOPB pinout, LMV7235M5X/NOPB application, or LMV7235M5X/NOPB equivalent, key selection criteria include open-drain flexibility for wired-OR logic, rail-to-rail input enabling ground/supply sensing, low quiescent current for portable systems, and guaranteed 75-ns timing at 5 V with 15 pF load.

Technical Context

The LMV7235M5X/NOPB uses a complementary PNP/NPN input stage supporting > rail-to-rail common-mode operation (−0.2 V to V_CC + 0.1 V), enabling accurate sensing at both supply rails and ground. Its open-drain output requires an external pull-up resistor, allowing level shifting across voltage domains and bus-wired OR functionality.

Propagation delay remains stable across temperature (−40°C to 85°C) and supply voltage (2.7–5.5 V), with typical 75 ns at 5 V/20 mV overdrive/15 pF load. Input offset voltage is ±1 mV (typ), and input bias current is 400 nA (max) at 25°C - critical for high-impedance sensor interface designs.

Key Specifications

Pinout & Package

LMV7235M5X/NOPB is packaged in a 5-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size, optimized for space-constrained PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV7235M5X/NOPB, LMV7239M5X/NOPB eliminates external components but sacrifices level-shifting capability, while TLV3501CDBVR delivers nanosecond speed at the cost of milliamp-level current - making LMV7235M5X/NOPB optimal for power-sensitive, mixed-voltage, or bus-shared comparator roles.

Availability

LMV7235M5X/NOPB is available at Aetrix Electronics and suitable for portable power management, zero-crossing detection, high-speed line reception, and window comparator applications requiring stable component supply and long-term industrial availability.

Supply support for LMV7235M5X/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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog ICs and power management.

The LMV7235M5X/NOPB belongs to TI's ultra-low-power comparator product line, designed specifically for energy-constrained portable, medical, and industrial sensing systems requiring rail-to-rail input operation and open-drain flexibility.

FAQ

What is the maximum supply voltage for LMV7235M5X/NOPB?

The absolute maximum supply voltage (V₊ − V₋) for LMV7235M5X/NOPB is 6 V, but the recommended operating range is 2.7 V to 5.5 V. Operation beyond 5.5 V risks reliability degradation and is not characterized. At 5.5 V, LMV7235M5X/NOPB maintains 75 ns propagation delay and 65 µA supply current, ensuring compatibility with standard 5 V logic and Li-ion battery peak voltages.

Does LMV7235M5X/NOPB support ground-referenced input signals?

Yes, LMV7235M5X/NOPB supports input common-mode voltages down to −0.2 V relative to V₋, enabling direct connection to ground-referenced AC signals like zero-crossing detection. This is confirmed in Section 6.5 of the datasheet, where V_CM min is specified as V₋ − 0.1 V (−0.2 V at temp extremes). The complementary PNP/NPN input stage allows robust operation even when one input is at ground while the other is at V_CC.

What pull-up resistor value is recommended for LMV7235M5X/NOPB output?

A 10 kΩ pull-up resistor is used in TI's characterization of LMV7235M5X/NOPB (Section 6.5, Note 4), yielding ~100 ns rise time at 5 V. For faster edges, lower values (e.g., 4.7 kΩ) reduce rise time but increase static current; for ultra-low power, values up to 100 kΩ are viable with corresponding rise-time trade-offs. LMV7235M5X/NOPB output leakage is only 3 nA, so high-value resistors introduce negligible error in threshold detection.

Can LMV7235M5X/NOPB be used in a crystal oscillator circuit?

Yes, LMV7235M5X/NOPB is explicitly validated in crystal oscillator applications (Section 8.2.2 of SNOS532O). Its open-drain output, rail-to-rail input, and 75 ns propagation delay support stable oscillation with parallel-resonant crystals. External bias resistors (R1–R4) and capacitor C1 set DC operating points, while the crystal provides frequency-determining positive feedback - all demonstrated in Figure 28 of the official datasheet.

How does temperature affect propagation delay in LMV7235M5X/NOPB?

Propagation delay increases modestly with temperature: at V_S = 5 V, 20 mV overdrive, and 15 pF load, t_PD rises from 89 ns at −40°C to 96 ns at 125°C (Figure 8). The variation is linear and bounded - critical for timing-critical applications like sampling clocks where jitter must remain predictable. LMV7235M5X/NOPB's 75 ns typical value at 25°C serves as the design center for thermal derating.