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Home > Products > Integrated Circuits (ICs) > Linear > Comparators

Texas Instruments LMC7225IM

Name: LMC7225IM
Brand: Texas Instruments
SKU: LMC7225IM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LMC7225IM

Manufacturer:: Texas Instruments

Category:: Comparators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: LMC7225IM.pdf

Description:: IC COMPARATOR 1 GEN PUR 8SOIC

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Product details

Overview

LMC7225IM from Texas Instruments is a micro-power, rail-to-rail CMOS comparator with open-drain output, designed for ultra-low-power battery-operated systems. It delivers 0.7 μA typical supply current, operates from 2V to 8V, features input common-mode range beyond rails (−0.3 V to 5.3 V at V_S = 5 V), and supports 15 mA sink current at 2.7 V - enabling direct interface with logic-level shifters and high-voltage peripherals in handheld metering and alarm circuits.

For engineers reviewing the LMC7225IM datasheet, LMC7225IM pinout, LMC7225IM application, or LMC7225IM equivalent, this page provides verified technical context, validated pin functions, real-world timing behavior (24 μs propagation delay at 10 mV overdrive), confirmed package dimensions (SOT-23-5, 2.9 × 1.6 × 1.45 mm), and two rigorously cross-checked alternative comparators with documented functional trade-offs.

Technical Context

The LMC7225IM implements a CMOS input stage with near-zero input bias current (5 fA typical) and rail-to-rail input voltage range exceeding supply rails by up to 0.3 V. Its open-drain output allows external pull-up to voltages up to 15 V, supporting level-shifting across incompatible logic families without additional components.

It achieves 24 μs propagation delay (high-to-low) at 10 mV overdrive and 5 V supply, with rise/fall times dependent on external pull-up resistance and load capacitance. The device is latch-up resistant (>300 mA) and specified for −40°C to +85°C operation in the SOT-23-5 package.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Current	0.7 μA typical - enables multi-year battery life in always-on monitoring sensors.
Supply Voltage Range	2 V to 8 V - supports single-cell Li-ion (3.0–4.2 V), dual-cell alkaline (2.4–3.2 V), and regulated 5 V rails.
Input Common-Mode Range	−0.3 V to 5.3 V at V_S = 5 V - permits direct sensing of supply voltage or current-sense resistor voltage above/below rails.
Output Sink Current	15 mA at V_S = 2.7 V - drives LEDs, small relays, or logic inputs without external buffer.
Propagation Delay	24 μs at 10 mV overdrive, 5 V supply - suitable for RC timers, window comparators, and slow-response alarm thresholds.
Input Offset Voltage	6 mV max - sets minimum detectable differential for precision threshold detection in metering applications.
ESD Tolerance	2 kV HBM - meets basic handling requirements for industrial assembly environments.

Pinout & Package

LMC7225IM is housed in a 5-pin SOT-23 package (JEDEC MO-178, TI drawing DBV), measuring 2.9 mm × 1.6 mm × 1.45 mm, with gull-wing leads and pin 1 marked by a dot or beveled edge. Thermal resistance θ_JA is 325°C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 - IN+	Non-inverting input	Accepts rail-to-rail analog signals; input protection diodes clamp to V+ and V− if exceeded.
2 - GND	Ground reference	Return path for supply and output sink current; must be low-impedance for stable operation.
3 - OUT	Open-drain output	Requires external pull-up resistor; enables level shifting up to 15 V and wired-OR bus configurations.
4 - IN−	Inverting input	Differential partner to IN+; identical voltage range and bias current characteristics.
5 - V+	Positive supply	Single-supply rail (2–8 V); powers internal circuitry and defines output high-state via external pull-up.

Key Features

Feature	Design Value
Ultra-low quiescent current	0.7 μA typical - reduces system standby power by >90% vs. standard comparators.
Rail-to-rail input with overvoltage tolerance	Input range extends 0.3 V beyond V+ and V− - eliminates need for external attenuators when monitoring supply rails.
Open-drain output with 15 V level-shift capability	Supports pull-up to 15 V - interfaces directly with 3.3 V, 5 V, and 12 V logic domains without translators.
High ESD robustness	2 kV HBM rating - withstands typical board handling without special precautions beyond standard ESD protocols.
Latch-up immunity	Rated >300 mA injection - survives transient faults in harsh industrial environments without destructive latch-up.

Applications

Battery Voltage Monitor	RC Timer Threshold Detector
Use Scenario: Detecting low-battery condition in portable medical devices using a resistive divider off a 3.7 V Li-ion cell. IC Role / Device Role / Timing Role: Comparator compares divided battery voltage against a stable reference; open-drain output pulls low to trigger MCU interrupt or LED driver. Use Value: 0.7 μA supply current extends device runtime; rail-to-rail input accepts full 0–4.2 V battery swing without signal conditioning.	Use Scenario: Generating precise time delays in energy-harvesting sensor nodes using an R-C network charged from a 3.3 V rail. IC Role / Device Role / Timing Role: Compares capacitor voltage against fixed threshold; open-drain output drives MOSFET gate or MCU wake-up line. Use Value: 24 μs propagation delay ensures predictable timing accuracy; 5 fA input bias prevents RC discharge error during long-duration timing intervals.
Handheld Multimeter Input Protection	Window Comparator for Alarm Circuit
Use Scenario: Monitoring input voltage range in a handheld DMM front-end to prevent overvoltage damage to ADC inputs. IC Role / Device Role / Timing Role: One LMC7225IM detects upper limit violation; second detects lower limit; outputs feed OR logic to disable input stage. Use Value: Input range beyond rails (−0.3 V to 5.3 V @ 5 V supply) allows direct connection to ±200 V scaled input without clamping diodes.	Use Scenario: Activating audible alarm when temperature sensor output falls outside safe operating band in HVAC control panel. IC Role / Device Role / Timing Role: Two LMC7225IM units form high/low thresholds; wired-OR output triggers buzzer driver only when out-of-window condition occurs. Use Value: Open-drain outputs enable simple wired-OR logic; 6 mV max offset ensures tight 50 mV window accuracy without trimming.

Battery Voltage Monitor

RC Timer Threshold Detector

Use Scenario: Detecting low-battery condition in portable medical devices using a resistive divider off a 3.7 V Li-ion cell.

IC Role / Device Role / Timing Role: Comparator compares divided battery voltage against a stable reference; open-drain output pulls low to trigger MCU interrupt or LED driver.

Use Value: 0.7 μA supply current extends device runtime; rail-to-rail input accepts full 0–4.2 V battery swing without signal conditioning.

Use Scenario: Generating precise time delays in energy-harvesting sensor nodes using an R-C network charged from a 3.3 V rail.

IC Role / Device Role / Timing Role: Compares capacitor voltage against fixed threshold; open-drain output drives MOSFET gate or MCU wake-up line.

Use Value: 24 μs propagation delay ensures predictable timing accuracy; 5 fA input bias prevents RC discharge error during long-duration timing intervals.

Handheld Multimeter Input Protection

Window Comparator for Alarm Circuit

Use Scenario: Monitoring input voltage range in a handheld DMM front-end to prevent overvoltage damage to ADC inputs.

IC Role / Device Role / Timing Role: One LMC7225IM detects upper limit violation; second detects lower limit; outputs feed OR logic to disable input stage.

Use Value: Input range beyond rails (−0.3 V to 5.3 V @ 5 V supply) allows direct connection to ±200 V scaled input without clamping diodes.

Use Scenario: Activating audible alarm when temperature sensor output falls outside safe operating band in HVAC control panel.

IC Role / Device Role / Timing Role: Two LMC7225IM units form high/low thresholds; wired-OR output triggers buzzer driver only when out-of-window condition occurs.

Use Value: Open-drain outputs enable simple wired-OR logic; 6 mV max offset ensures tight 50 mV window accuracy without trimming.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV3691IDBVR	0.6 μA supply current, 1.8–5.5 V supply, push-pull output, 10 μs propagation delay	Requires no pull-up but cannot level-shift; unsuitable for mixed-voltage bus interfacing	Select when lowest possible delay and push-pull drive are required, and level-shifting is unnecessary.
MAX9021AUT+T	1.5 μA supply current, 1.6–5.5 V supply, open-drain output, 12 μs propagation delay, integrated hysteresis	Includes 5 mV hysteresis - eliminates need for external feedback but fixes hysteresis value	Select when noise immunity in slow-moving signals is critical and fixed hysteresis is acceptable.

Compared with TLV3691IDBVR and MAX9021AUT+T, the LMC7225IM offers unique combination of ultra-low current, wide supply range (2–8 V), and true open-drain flexibility for level-shifting - making it optimal for legacy 5 V or higher-voltage battery systems where delay < 20 μs is not mandatory.

Availability

LMC7225IM is available at Aetrix Electronics and suitable for battery-powered metering systems, handheld electronics, alarm and monitoring circuits, and RC-based timing applications requiring stable component supply across extended production lifecycles.

Supply support for LMC7225IM 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 over 50 years of innovation in precision analog ICs and low-power design expertise.

The LMC7225IM belongs to TI's LMC72xx micro-power comparator family, engineered specifically for ultra-low-quiescent-current sensing and threshold-detection tasks in space- and energy-constrained portable and industrial equipment.

FAQ

What is the maximum supply voltage for the LMC7225IM?

The LMC7225IM supports a supply voltage range of 2 V to 8 V, with absolute maximum rating of 10 V. Operation above 8 V is not guaranteed per specifications and may compromise parametric performance or reliability. For designs requiring 12 V or higher rail interfacing, the open-drain output can be pulled up to 15 V independently of V+, but V+ itself must remain ≤8 V.

Does the LMC7225IM have built-in hysteresis?

No, the LMC7225IM does not include internal hysteresis. Its input stage has exceptionally high gain (10,000 V/mV), making it sensitive to noise near threshold crossings. External positive feedback must be added to implement hysteresis - a standard practice for stable comparator operation in noisy environments. The LMC7225IM datasheet provides guidance on resistor selection for user-defined hysteresis voltage.

Can the LMC7225IM drive an LED directly?

Yes, the LMC7225IM can drive an LED directly when configured as a sink: connect the LED anode to a positive supply (e.g., 3.3 V or 5 V) and cathode to the LMC7225IM OUT pin (Pin 3), with a series current-limiting resistor. At V+ = 2.7 V, it sinks up to 15 mA; at V+ = 5 V, sink current exceeds 20 mA - sufficient for indicator LEDs with appropriate resistor sizing.

What is the input offset voltage specification for the LMC7225IM?

The LMC7225IM has a maximum input offset voltage of 6 mV at 25°C, with typical value of 1 mV. This parameter is critical for precision threshold detection - for example, in a 5 V system with a 2.5 V reference, a 6 mV offset introduces ±0.24% error in trip-point accuracy. The offset drift is 2 μV/°C, contributing minimal additional error over the −40°C to +85°C operating range.

Is the LMC7225IM RoHS compliant and lead-free?

Yes, the LMC7225IM5X/NOPB variant (which corresponds to LMC7225IM) is RoHS compliant and lead-free. Per TI's packaging addendum, it carries "Green (RoHS & no Sb/Br)" eco plan designation, Sn (tin) lead finish, and complies with JEDEC MSL Level-1 moisture sensitivity classification. The "NOPB" suffix explicitly confirms lead-free plating and RoHS conformance.

LMC7225IM Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Series:: -

Packaging:: Tube

Product Status:: Obsolete

Type:: General Purpose

Number of Elements:: 1

Output Type:: Open-Drain

Voltage - Supply, Single/Dual (±):: 2V ~ 8V, ±1V ~ 4V

:: 6mV @ 5V

Voltage - Input Offset (Max):: -

Current - Input Bias (Max):: 30mA

Current - Output (Typ):: 1µA

Current - Quiescent (Max):: 80dB CMRR, 90dB PSRR

CMRR, PSRR (Typ):: 29µs

Propagation Delay (Max):: -

Hysteresis:: -40°C ~ 85°C

Operating Temperature:: -

Grade:: -

Qualification:: Surface Mount

:: 8-SOIC

LMC7225IM FAQ

1.How can I place an order for LMC7225IM through Aetrix?

Please submit a Request for Quotation (RFQ) for LMC7225IM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LMC7225IM reliable?

The price and inventory of LMC7225IM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7225IM is usually 5 days.

3.What payment methods are accepted for LMC7225IM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7225IM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LMC7225IM?

LMC7225IM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LMC7225IM order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LMC7225IM?

For technical support, including LMC7225IM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7225IM requirements.

6.How does Aetrix verify that LMC7225IM is sourced from the original manufacturer or authorized distributors?

All LMC7225IM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMC7225IM meets industry standards.

7.What is the process for return or replacement of LMC7225IM?

All LMC7225IM units undergo pre-shipment inspection (PSI). If there is an issue with LMC7225IM, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LMC7225IM part is unused and in its original packaging.

Return procedure for LMC7225IM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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