Texas Instruments LMC6772AIMX

Overview

LMC6772AIMX from Texas Instruments is a dual micropower rail-to-rail input CMOS comparator with open-drain output, designed for ultra-low-power sensing and threshold detection in battery-powered systems. It delivers 10 μA max supply current per comparator, operates from 2.7 V to 15 V, features rail-to-rail input common-mode range exceeding both supply rails, and provides 420 ns propagation delay at 5 V with 100 mV overdrive - enabling precision voltage monitoring in portable metering and handheld electronics.

For engineers reviewing the LMC6772AIMX datasheet, LMC6772AIMX pinout, LMC6772AIMX application, or LMC6772AIMX equivalent, key selection criteria include its micropower operation, open-drain flexibility for wired-OR logic and level-shifting, rail-to-rail input capability down to 2.7 V, guaranteed −40°C to +85°C operation, and SOIC-8 packaging compatible with standard PCB assembly processes.

Technical Context

The LMC6772AIMX integrates two independent comparators sharing only power rails, each with rail-to-rail input stages capable of accepting signals beyond V− and V+ by up to 200 mV. Its CMOS input stage draws just 0.02 pA typical input bias current and achieves 75 dB common-mode rejection at 2.7 V, supporting high-impedance sensor interfacing without external amplification.

Each comparator features an open-drain NMOS output stage rated for 40 mA short-circuit protection and capable of sinking current up to 15 V regardless of the device's own supply voltage - enabling direct interface to higher-voltage logic domains or pull-up to auxiliary supplies in multivibrator, zero-crossing, and window comparator topologies.

Key Specifications

Pinout & Package

LMC6772AIMX is housed in an 8-pin SOIC (D) package measuring 3.91 mm × 4.90 mm, with standard JEDEC MS-012AC footprint and gull-wing leads suitable for reflow soldering. Pin 1 is marked with a beveled corner or dot; orientation follows industry-standard quadrant Q1 feed direction in tape-and-reel delivery.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMC6772AIMX, LMC6762AIMX trades open-drain versatility for push-pull simplicity, while TLV3702IDR offers tighter DC specs at the cost of reduced input voltage margin - making LMC6772AIMX optimal for ultra-low-power, wide-input-range, and multi-rail interface use cases.

Availability

LMC6772AIMX is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable consumer electronics, and industrial sensor interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for LMC6772AIMX 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 decades of expertise in precision analog ICs and low-power design.

The LMC6772AIMX belongs to TI's micropower comparator family, engineered specifically for energy-constrained applications where rail-to-rail input operation, open-drain flexibility, and sub-30 μA supply current are critical system requirements.

FAQ

What is the maximum supply voltage rating for LMC6772AIMX?

The absolute maximum supply voltage (V+ − V−) for LMC6772AIMX is 16 V, with recommended operating range from 2.7 V to 15 V. Exceeding 16 V risks permanent damage. The device maintains full rail-to-rail input functionality and 420 ns propagation delay performance across this entire operating range, as verified in TI's SNOS749G datasheet Section 5.2.

Does LMC6772AIMX support true rail-to-rail input operation?

Yes, LMC6772AIMX supports true rail-to-rail input operation: its common-mode voltage range extends to at least −0.3 V below V− and +0.3 V above V+ across all supply voltages (2.7 V, 5 V, and 15 V), as confirmed in Sections 5.3 and 5.4 of the datasheet. This enables direct sensing of signals referenced to ground or supply rails without external biasing networks.

Can LMC6772AIMX outputs drive a 12 V logic rail?

Yes, LMC6772AIMX outputs can sink current into a 12 V pull-up rail because its open-drain NMOS output stage is rated for up to 15 V on the drain node, independent of the device's own V+ supply. This capability is explicitly documented in the "Description" section and validated in Figure 5-4 of the SNOS749G datasheet under 12 V load conditions.

What is the guaranteed operating temperature range for LMC6772AIMX?

LMC6772AIMX is specified for guaranteed operation from −40°C to +85°C, as stated in Section 5.2 "Operating Ratings" of the SNOS749G datasheet. This applies to the AI grade (industrial temperature range); the Q-grade variant extends to +125°C but is not applicable to the AIMX suffix.

Is LMC6772AIMX pin-compatible with LMC6772BIMX?

Yes, LMC6772AIMX and LMC6772BIMX share identical SOIC-8 pinout and package dimensions, differing only in electrical specifications: the BI grade has higher input offset voltage (8 mV max vs. 5 mV max for AI) and wider input offset drift (4 μV/°C vs. 2 μV/°C). Both are drop-in replacements in layout, as confirmed in TI's Package Information table and Orderable Part Number Addendum.