STMicroelectronics LMV339IDT

Overview

LMV339IDT from STMicroelectronics is a quad low-voltage rail-to-rail input comparator with open-drain outputs, designed for space-constrained portable systems operating from 2.7 V to 5.0 V supply. It delivers 20 µA typical supply current, 200 ns propagation delay (at 100 mV overdrive), -40°C to +125°C operating temperature range, and input common-mode range extending to ground - enabling direct sensing of battery or sensor signals near 0 V in battery-powered instrumentation.

For engineers reviewing the LMV339IDT datasheet, LMV339IDT pinout, LMV339IDT application, or LMV339IDT equivalent, key selection criteria include its SO-14 package footprint, guaranteed operation at 125°C ambient, low quiescent current for multi-year battery life, open-drain output compatibility with mixed-voltage logic interfaces, and direct drop-in replacement capability for legacy LM339-based designs requiring extended temperature support.

Technical Context

The LMV339IDT implements four independent voltage comparators with rail-to-rail input stages that accept common-mode voltages down to VCC− (ground) and up to 0.1 V below VCC+, enabling accurate threshold detection across the full supply range. Each channel features an open-drain NMOS output stage capable of sinking ≥47 mA at 5 V supply and ≤400 mV VOL at 4 mA sink current, supporting wired-OR logic and level translation without external pull-ups in many configurations.

Its internal architecture minimizes propagation delay variation across supply (2.7–5.0 V) and temperature (-40°C to +125°C), with TPHL/TPLH specified at 275/425 ns (typ.) under 100 mV overdrive at 5 V. Input offset voltage remains tightly bounded at 1–9 mV over temperature, and input bias current stays below 400 nA, ensuring stable reference comparison in high-impedance sensor monitoring circuits.

Key Specifications

Pinout & Package

LMV339IDT is supplied in a 14-lead SOIC (SO-14) package with standard 1.27 mm pitch, 8.75 mm × 3.90 mm body size, and 1.75 mm height - compatible with automated SMT placement and reflow profiles per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad low-voltage comparator applications.

Compared with LM339DT and TLV339IPWR, LMV339IDT uniquely balances ultra-low power (25 µA), high-speed response (275 ns), and full industrial temperature range (–40°C to +125°C) in a widely available SO-14 package - making it the optimal choice for next-generation battery-powered industrial controllers and automotive body electronics.

Availability

LMV339IDT is available at Aetrix Electronics and suitable for battery voltage monitoring, motor overcurrent protection, industrial temperature sensing, and power supply sequencing requiring stable component supply across automotive, industrial, and medical device production programs.

Supply support for LMV339IDT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, power management devices, and MEMS sensors for industrial, automotive, and consumer markets.

The LMV3xx series belongs to ST's precision analog portfolio, engineered specifically for low-voltage, low-power sensing and decision-making functions in portable and harsh-environment electronics - emphasizing supply flexibility, thermal robustness, and space efficiency.

FAQ

Can LMV339IDT operate with a 2.5 V supply?

No. The absolute minimum supply voltage is 2.7 V per datasheet Table 2. At 2.5 V, input common-mode range collapses, propagation delay increases unpredictably, and output saturation voltage rises beyond specification - risking incorrect logic decisions in safety-critical monitoring. Designers must use ≥2.7 V or select alternatives like TLV339 (2.0 V min).

Is an external pull-up resistor required on all open-drain outputs?

Yes. Each OUTx pin is an NMOS drain terminal with no internal pull-up. A resistor (typically 4.7–10 kΩ) must connect between OUTx and the target logic rail (e.g., 3.3 V) to assert HIGH. Multiple outputs may share one pull-up for wired-OR logic, but individual pull-ups are needed if outputs drive different voltage domains or require independent timing control.

Does LMV339IDT support rail-to-rail output swing?

No. LMV339IDT has open-drain outputs only - they can pull down to ≤400 mV (at 4 mA sink) but cannot actively drive HIGH. Output HIGH level is determined solely by the external pull-up voltage. For push-pull rail-to-rail output, consider ST's TS882IYLT (dual, 1.8–5.5 V) or TI's TLC372CDR (dual, 3–16 V), though neither matches the LMV339IDT's quad channel count or 125°C rating.

How does input offset voltage affect accuracy in precision threshold detection?

With a guaranteed max VIO of 9 mV over temperature, LMV339IDT introduces ≤±4.5 mV uncertainty in threshold setting. For a 3.3 V reference applied to IN+, this yields ±0.14% error - acceptable for battery UVLO (2.8 V ±20 mV) or thermal alarms (100°C ±2°C). For sub-millivolt accuracy, add external trimming or use auto-zero comparators like LTC1540, which offer <10 µV VIO but consume >10× more current.