Texas Instruments LMC6772AIM

Overview

LMC6772AIM from Texas Instruments is a dual micropower rail-to-rail input CMOS comparator with open-drain output, designed for ultra-low-power battery-operated systems. It delivers 10 μA max supply current per comparator, operates from 2.7 V to 15 V, and supports rail-to-rail input common-mode voltage range exceeding both supply rails - enabling direct sensing near ground or V₊ in single-supply applications such as portable metering and handheld electronics.

For engineers reviewing the LMC6772AIM datasheet, LMC6772AIM pinout, LMC6772AIM application, or LMC6772AIM equivalent, key selection criteria include its 420 ns propagation delay at 5 V/100 mV overdrive, ±30 mA output short-circuit rating, −40°C to +85°C operating junction temperature, open-drain flexibility for wired-OR logic level shifting, and SOIC-8 package compatibility with legacy PCB layouts.

Technical Context

The LMC6772AIM implements two independent high-impedance CMOS comparators with rail-to-rail input stages and NMOS open-drain outputs. Its input stage achieves <0.02 pA typical input bias current and 75 dB common-mode rejection, enabling direct interface with high-impedance sensors without external amplification.

Each comparator features internal power-on reset and ESD protection (1.5 kV HBM on outputs), with propagation delay tightly specified across 2.7 V–15 V supply range and temperature extremes. The open-drain architecture allows output pull-up to any voltage ≤15 V - decoupling logic-level translation from supply domain constraints.

Key Specifications

Pinout & Package

LMC6772AIM is housed in an 8-pin SOIC (D) package measuring 3.91 mm × 4.90 mm, with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Pin 1 is marked with a dot or beveled edge, and the device is RoHS-compliant with NiPdAu lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMC6762AIM and TLV3702IDR, the LMC6772AIM uniquely balances ultra-low power (10 μA), true rail-to-rail input capability, and open-drain flexibility - making it optimal for battery-constrained systems requiring robust input tolerance and logic-level interoperability.

Availability

LMC6772AIM is available at Aetrix Electronics and suitable for portable instrumentation, battery management systems, and low-power alarm circuits requiring stable component supply across extended production lifecycles.

Supply support for LMC6772AIM 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 LMC6772AIM belongs to TI's micropower comparator product line, engineered specifically for energy-constrained applications where input accuracy, supply flexibility, and long-term reliability outweigh raw speed requirements.

FAQ

What is the maximum supply voltage rating for LMC6772AIM?

The absolute maximum supply voltage (V+ – V−) for LMC6772AIM is 16 V, with recommended operating range from 2.7 V to 15 V. Exceeding 16 V risks permanent damage to internal circuitry, including ESD protection diodes and input transistors. Operation at 15 V is fully characterized in the datasheet for parameters including propagation delay, output sinking capability, and input common-mode range.

Does LMC6772AIM support true rail-to-rail input operation?

Yes, LMC6772AIM supports true rail-to-rail input operation: its input common-mode voltage range extends to −0.3 V below V− and +0.3 V above V+ across all supply voltages (2.7 V to 15 V). This is verified by CMRR >55 dB over that full range and enables direct interface with sensors whose outputs swing to ground or near V+ without external biasing networks.

Can LMC6772AIM outputs drive a 12 V logic rail?

Yes, LMC6772AIM's open-drain outputs can safely interface with 12 V logic rails when externally pulled up to that voltage. The datasheet explicitly states the output can be pulled to "any voltage rail up to 15 V, regardless of the supply voltage of the LMC6772AIM." However, output short-circuit current must remain within ±30 mA limits, and continuous shorting to V+ >12 V may affect long-term reliability.

What is the guaranteed propagation delay for LMC6772AIM at 2.7 V supply?

At V+ = 2.7 V, 100 mV input overdrive, and T_J = 25°C, the guaranteed maximum propagation delay for LMC6772AIM is t_PLH = 420 ns and t_PHL = 450 ns. These values are ensured across the full −40°C to +85°C operating temperature range per the LMC6772AI grade specifications in Section 5.5 of the datasheet.

Is LMC6772AIM pin-compatible with LMC6772BIM or LMC6772QMM?

No - LMC6772AIM (SOIC-8) is not pin-compatible with LMC6772QMM (VSSOP-8), though both share identical pin functions. Physical dimensions and pad layouts differ: SOIC-8 has 3.91 mm × 4.90 mm body and 1.27 mm pitch, while VSSOP-8 measures 3.00 mm × 3.00 mm with 0.65 mm pitch. LMC6772BIM uses the same SOIC-8 package but differs in input offset voltage (8 mV max vs. 5 mV max for AIM), requiring validation in precision threshold applications.