Texas Instruments LMC7215IM5X

Overview

LMC7215IM5X from Texas Instruments is a micro-power, rail-to-rail CMOS comparator with push-pull output in a 5-pin SOT-23 package. It delivers 0.7 μA typical supply current, operates from 2V to 8V, and supports input common-mode voltage beyond rails (–0.3 V to 5.3 V at V_S = 5 V). It is used in battery-powered metering systems for precision zero-crossing detection.

For engineers reviewing the LMC7215IM5X datasheet, LMC7215IM5X pinout, LMC7215IM5X application, or LMC7215IM5X equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative comparators for low-power single-supply sensing and timing circuits.

Technical Context

The LMC7215IM5X implements a high-gain CMOS comparator core (140 dB voltage gain) with rail-to-rail input stage enabling operation down to 2V supply and input voltages extending 0.3 V below V₋ and 0.3 V above V₊. Its push-pull output drives up to 45 mA sink/source at 5 V without external pull-up resistors.

It features ultra-low input bias current (5 fA typical), near-zero input offset drift (2 μV/°C), and propagation delay of 24 μs (typical, 10 mV overdrive at 5 V). Input protection diodes allow safe operation with signals exceeding supply rails, supporting direct V_CC monitoring and high-side current sensing.

Key Specifications

Pinout & Package

LMC7215IM5X uses the industry-standard 5-pin SOT-23 (DBV) package, 2.9 mm × 1.6 mm × 1.45 mm, RoHS-compliant, tape-and-reel (3000 pcs/reel), MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3701IDBVR and MAX9021AXK+T, the LMC7215IM5X uniquely combines sub-μA supply current, true beyond-rail inputs, and push-pull output-enabling simpler, more robust single-supply sensing in metering and portable electronics without compromises in interface flexibility or voltage range.

Availability

LMC7215IM5X is available at Aetrix Electronics and suitable for hand-held metering, battery voltage monitoring, and RC timer circuits requiring stable component supply with long-term manufacturability and consistent parametric performance.

Supply support for LMC7215IM5X 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 LMC7215IM5X belongs to TI's LMC72xx micro-power comparator family, engineered specifically for battery-operated instrumentation, portable medical devices, and energy-conscious industrial sensors where rail-to-rail operation and nanoamp-level quiescent current are critical.

FAQ

What is the maximum supply voltage for LMC7215IM5X?

The absolute maximum supply voltage (V+ – V−) for LMC7215IM5X is 10 V, but the recommended operating range is 2 V to 8 V per the datasheet. Operation at 8 V is fully characterized and supported across the full temperature range (–40°C to +85°C); sustained use at 10 V may risk reliability and is not guaranteed.

Does LMC7215IM5X support input voltages beyond the supply rails?

Yes, LMC7215IM5X supports input common-mode voltage from –0.3 V to V+ + 0.3 V. At V+ = 5 V, this means inputs can range from –0.3 V to 5.3 V - enabling direct connection to V_CC, ground-referenced shunts, or signals from higher-voltage domains, provided input current is limited to ±5 mA via series resistance.

Can LMC7215IM5X drive an LED directly?

Yes, LMC7215IM5X can drive an LED directly: its push-pull output sources up to 45 mA at 5 V, sufficient for standard indicator LEDs (typically 5–20 mA). For a 2 V LED with 5 V supply, a 150 Ω current-limiting resistor yields ~20 mA - no additional transistor or driver is required.

What is the typical propagation delay of LMC7215IM5X at 3.3 V supply?

At V_S = 3.3 V and 10 mV overdrive, the typical propagation delay of LMC7215IM5X is 17 μs (both t_PHL and t_PLH). This value is explicitly specified in the datasheet's AC Electrical Characteristics table under "V+ = 2.7 V" conditions, which covers 3.3 V operation.

Is LMC7215IM5X pin-compatible with LMC7225IM5X?

No, LMC7215IM5X and LMC7225IM5X are not pin-compatible in functional terms: both use the same 5-pin SOT-23 (DBV) package and pinout, but LMC7215IM5X has a push-pull output while LMC7225IM5X has open-drain. Swapping them requires circuit changes - e.g., adding a pull-up for LMC7225IM5X or removing it for LMC7215IM5X.