Texas Instruments LMC6772AIMM

Overview

LMC6772AIMM 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 LMC6772AIMM datasheet, LMC6772AIMM pinout, LMC6772AIMM application, or LMC6772AIMM equivalent, key selection criteria include its 420 ns propagation delay at 5 V/100 mV overdrive, 40 mA short-circuit protection, −40°C to +85°C operating temperature, VSSOP-8 package, and compatibility with wired-OR logic level shifting across mixed-voltage domains.

Technical Context

The LMC6772AIMM integrates two independent comparators sharing only power rails, each featuring rail-to-rail input stages with 20 fA typical input bias current and 75 dB CMRR. Its open-drain NMOS output stage allows external pull-up to any voltage ≤15 V - decoupling output logic level from supply voltage and enabling universal level translation.

It employs micropower biasing with guaranteed operation down to 2.7 V, where input common-mode range extends to −0.3 V (below V₋) and up to V₊ + 0.3 V, supported by internal ESD clamps and thermal shutdown protection. Propagation delay is characterized across 10 mV–100 mV overdrive and 2.7 V–15 V supplies, with worst-case t_PLH/t_PHL of 450 ns/450 ns at 2.7 V.

Key Specifications

Pinout & Package

VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm lead pitch, exposed pad optional, RoHS-compliant NIPDAU finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV7012DRYR and LMC6762AIMM, the LMC6772AIMM uniquely balances ultra-low power, rail-to-rail input beyond supplies, and open-drain flexibility - making it the only option supporting both battery longevity and multi-voltage logic interfacing in a single 3 mm × 3 mm footprint.

Availability

LMC6772AIMM is available at Aetrix Electronics and suitable for battery-powered metering, handheld electronics monitoring, RC timing circuits, alarm systems, and window detection requiring stable component supply across industrial and consumer production cycles.

Supply support for LMC6772AIMM 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 delivering analog and embedded processing solutions, with leadership in precision analog, low-power design, and automotive-grade reliability.

The LMC6772AIMM belongs to TI's micropower comparator product line, engineered specifically for energy-constrained applications where rail-to-rail input operation, open-drain flexibility, and sub-15 μA total supply current are mandatory design requirements.

FAQ

What is the maximum supply voltage for the LMC6772AIMM?

The LMC6772AIMM supports a maximum supply voltage of 15 V between V+ and V−. Absolute maximum ratings specify 16 V, but ensured electrical performance is guaranteed only up to 15 V. Operation above 15 V risks parametric degradation or reliability impact, especially under output short-circuit conditions where V+ > 12 V is explicitly cautioned against in the datasheet.

Does the LMC6772AIMM have rail-to-rail input capability beyond the supply rails?

Yes, the LMC6772AIMM has a rail-to-rail input common-mode voltage range that exceeds both supply rails: it operates from V− − 0.3 V to V+ + 0.3 V at room temperature. This is confirmed in Section 5.3 and 5.4 of the datasheet, where V_CM min/max values are specified as −0.3 V and V+ + 0.3 V across 2.7 V, 5 V, and 15 V supplies - enabling direct interface to overvoltage or undershoot signals without clamping diodes.

What is the propagation delay of the LMC6772AIMM at 2.7 V supply?

At V+ = 2.7 V, 100 mV input overdrive, and T_A = 25°C, the LMC6772AIMM exhibits t_PLH = 420 ns and t_PHL = 450 ns. These values are explicitly stated in Section 6.3 ("Low Voltage Operation") and reflected in Figure 5-5 and 5-6. Performance degrades slightly at temperature extremes, but the 420–450 ns range remains valid for design margining in low-voltage portable systems.

Can the LMC6772AIMM outputs be wire-OR'd together?

Yes, the LMC6772AIMM features open-drain NMOS outputs (pins 1 and 7), which are explicitly designed for wired-OR configurations. The datasheet confirms this in Section 3 ("Description") and Section 6.7.1 ("Universal Logic Level Shifter"), noting that multiple outputs can be tied together with a single pull-up resistor to enable active-low OR logic - a key enabler for interrupt aggregation in resource-constrained microcontrollers.

What is the operating temperature range of the LMC6772AIMM?

The LMC6772AIMM is rated for −40°C to +85°C junction temperature, as defined in Section 5.2 ("Operating Ratings") for the "LMC6772AI" grade. This is distinct from the automotive-grade LMC6772Q (−40°C to +125°C). The "AIMM" suffix denotes the VSSOP-8 package and AI temperature grade, and all ordering variants including LMC6772AIMMX/NOPB.B share this same temperature specification.