Texas Instruments LMC7221BIM5/NOPB

Overview

LMC7221BIM5/NOPB from Texas Instruments is a micropower CMOS single comparator with rail-to-rail input, open-drain output, 5 mV max input offset voltage (BI grade), 7 μA typical supply current at 5 V, and 4 μs propagation delay at 5 V - deployed in battery-powered mixed-voltage sensor interface and power monitoring circuits.

For engineers reviewing the LMC7221BIM5/NOPB datasheet, LMC7221BIM5/NOPB pinout, LMC7221BIM5/NOPB application, or LMC7221BIM5/NOPB equivalent, key selection criteria include its 2.7–15 V wide supply range, sub-1 pA input bias current, open-drain output compatible with 3.3 V/5 V/15 V pull-up rails, and SOT-23-5 footprint for space-constrained portable designs.

Technical Context

The LMC7221BIM5/NOPB uses a CMOS input stage enabling rail-to-rail common-mode input range extending 0.3 V beyond both supply rails, and an NMOS open-drain output stage capable of sinking up to 45 mA while supporting external pull-up voltages up to 15 V. Its low 0.04 pA typical input bias current and 0.02 pA input offset current enable high-impedance signal conditioning without loading.

This comparator operates across −40°C to +85°C with guaranteed performance at 2.7 V, 5 V, and 15 V supplies. Its 1.0 μV/°C input offset drift and 3.3 μV/month average drift support stable long-term threshold detection in battery-operated systems where reference stability is critical.

Key Specifications

Pinout & Package

LMC7221BIM5/NOPB is housed in a 5-pin SOT-23 package (DBV0005A), 3.05 mm × 3.00 mm × 1.43 mm, RoHS-compliant, tape-and-reel packaged (1000 pcs/reel). Pin 1 is marked with a dot; device orientation follows JEDEC MO-178 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMC7221AIM5/NOPB, the LMC7221BIM5/NOPB trades offset accuracy for cost and availability in high-volume consumer applications; versus TLV3691IDBVR, it sacrifices quiescent current to gain 15 V operation and open-drain flexibility in industrial/mixed-rail systems.

Availability

LMC7221BIM5/NOPB is available at Aetrix Electronics and suitable for battery-powered portable electronics, mixed-voltage sensor interfaces, and power supply monitoring applications requiring stable component supply across extended production lifecycles.

Supply support for LMC7221BIM5/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The LMC7221BIM5/NOPB belongs to TI's precision micropower comparator product line, designed specifically for space- and power-constrained applications requiring rail-to-rail input, open-drain output, and guaranteed operation down to 2.7 V.

FAQ

What is the maximum supply voltage rating for the LMC7221BIM5/NOPB?

The LMC7221BIM5/NOPB has an absolute maximum supply voltage (V+ – V−) of 16 V, with recommended operating range from 2.7 V to 15 V. Operation at 15 V is fully characterized per the datasheet, including input common-mode range, propagation delay, and output sink capability - making LMC7221BIM5/NOPB suitable for industrial 12 V systems with margin.

Does the LMC7221BIM5/NOPB support rail-to-rail input operation?

Yes, the LMC7221BIM5/NOPB supports true rail-to-rail input operation: its common-mode input voltage range extends from V− −0.3 V to V+ +0.3 V under all tested conditions (2.7 V, 5 V, and 15 V supplies). This allows direct sensing of signals at or slightly beyond the supply rails - critical for VCC monitoring and zero-crossing detection without external level-shifting components.

What is the input offset voltage specification for the LMC7221BIM5/NOPB?

The LMC7221BIM5/NOPB is the BI-grade variant, with a maximum input offset voltage of 15 mV at 25°C (ensured limit), and 18 mV at temperature extremes. Typical offset is 3 mV. This grade balances cost and performance for non-critical threshold detection, such as battery low-voltage alerts or basic overvoltage flags where ±15 mV tolerance is acceptable.

Can the LMC7221BIM5/NOPB drive an LED directly?

Yes, the LMC7221BIM5/NOPB can directly drive low-current LEDs: its open-drain output sinks up to 45 mA (short-circuit current), and typical sink current at 0.4 V output low is ≥5 mA at 5 V supply. With a series current-limiting resistor, it reliably drives indicator LEDs in portable devices - leveraging its 7 μA supply current to minimize total system power.

Is the LMC7221BIM5/NOPB pin-compatible with other SOT-23 comparators?

The LMC7221BIM5/NOPB uses standard 5-pin SOT-23 pinout (IN−, IN+, V−, OUT, V+) per JEDEC MO-178, matching TI's LMC7211, TLV3691, and many industry-standard micropower comparators. However, output architecture differs: LMC7221BIM5/NOPB is open-drain only, whereas push-pull variants (e.g., LMC7211) cannot be substituted without circuit modification.