My Inquiry
My Account
Texas Instruments LMC7221AIM5X
- Part No.:
- LMC7221AIM5X
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMC7221AIM5X.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,298
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMC7221AIM5X from Texas Instruments is a micropower CMOS single comparator in 5-pin SOT-23 package, featuring rail-to-rail input voltage range (beyond V− and V+), open-drain output, 7 μA typical supply current at 5V, 4 μs propagation delay at 5V, and guaranteed operation from 2.7V to 15V supply. It serves as a precision voltage threshold detector in space-constrained battery-powered systems.
For engineers reviewing the LMC7221AIM5X datasheet, LMC7221AIM5X pinout, LMC7221AIM5X application, or LMC7221AIM5X equivalent, this page delivers verified specifications, validated SOT-23 pin mapping, real-world mixed-voltage interface use cases, and two confirmed alternative comparators with documented functional and parametric distinctions.
Technical Context
The LMC7221AIM5X implements a CMOS input stage with p-channel and n-channel differential pairs enabling rail-to-rail common-mode input range extending 0.2 V beyond both supply rails. Its open-drain NMOS output stage allows external pull-up to voltages up to 15 V, independent of the comparator's own 2.7–15 V supply.
It achieves 75 dB minimum common-mode rejection ratio (CMRR) and 80 dB minimum power supply rejection ratio (PSRR) across its full operating voltage range, with input offset voltage specified at 5 mV max (AI grade) and input bias current of 0.04 pA typical-enabling direct high-impedance sensor interfacing without signal degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 15 V - supports single-supply operation across battery discharge curves and mixed-voltage system domains. |
| Input Offset Voltage (max) | 5 mV - ensures reliable detection of small analog signals above reference thresholds without calibration. |
| Supply Current (typ) | 7 μA at 5 V - extends runtime in coin-cell or Li-ion portable devices by minimizing quiescent power draw. |
| Propagation Delay | 4 μs at 5 V, 100 mV overdrive - enables responsive threshold detection in low-speed monitoring and alarm circuits. |
| Input Common-Mode Range | V− − 0.2 V to V+ + 0.3 V - permits direct sensing of signals near or slightly beyond supply rails, eliminating level-shifting components. |
| Output Type | Open-drain NMOS - allows flexible logic-level translation via external pull-up resistor to 3.3 V, 5 V, or 15 V rails. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial and automotive cabin-temperature embedded applications. |
Pinout & Package
LMC7221AIM5X is housed in a 5-pin SOT-23 package (JEDEC MO-178, TI drawing DBV0005A), measuring 3.05 mm × 2.75 mm × 1.45 mm max height. The package is RoHS-compliant, green (low-halogen), and rated MSL Level-1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting Input | Differential input node accepting signals down to V− − 0.2 V; high-impedance (0.04 pA bias) for minimal loading of sensors or dividers. |
| 2 (GND) | Ground Reference | Power return path for supply and internal circuitry; must be low-impedance connection to minimize noise coupling. |
| 3 (IN+) | Non-Inverting Input | Differential input node accepting signals up to V+ + 0.3 V; identical impedance and rail-to-rail capability as IN−. |
| 4 (V+) | Positive Supply | Single-supply rail input (2.7–15 V); powers internal CMOS stages and defines upper common-mode limit. |
| 5 (OUT) | Open-Drain Output | NMOS drain terminal requiring external pull-up; sinks up to 5 mA while maintaining VOL ≤ 0.4 V at 5 V supply. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Operates with inputs from V− − 0.2 V to V+ + 0.3 V - eliminates need for input voltage scaling in supply monitoring or current-sense circuits. |
| 7 μA supply current | Enables >1-year operation on CR2032 coin cell in low-duty-cycle wake-up detectors without compromising response time. |
| Open-drain output | Supports mixed-voltage logic interfacing (e.g., 5 V comparator driving 3.3 V microcontroller GPIO) using a single external resistor. |
| 0.04 pA input bias current | Permits direct connection to high-value timing resistors (>10 MΩ) or high-impedance pH/thermocouple sensors without gain error. |
| −40 °C to +85 °C operation | Validated performance across industrial temperature range without derating - suitable for unregulated environments like handheld test gear. |
Applications
| Battery Voltage Monitor | Mixed-Voltage Logic Interface |
|---|---|
|
Use Scenario: Detecting when a single-cell Li-ion battery drops below 3.0 V to trigger low-power shutdown in wearables. IC Role / Device Role / Timing Role: Threshold comparator comparing battery voltage against a stable 3.0 V reference; output drives enable pin of PMIC. Use Value: Eliminates external op-amp buffer and level shifter due to rail-to-rail input and open-drain output-reducing BOM count by 2 components. |
Use Scenario: Converting analog sensor output (0–2.5 V) into 3.3 V logic signal for an MCU ADC-ready interrupt line. IC Role / Device Role / Timing Role: Analog-to-digital threshold translator; IN+ tied to sensor, IN− to reference, OUT pulled to 3.3 V. Use Value: Enables direct interface between 5 V-supplied comparator and 3.3 V MCU without level-shifter IC or resistor divider network. |
| PCMCIA Card Presence Detection | Low-Power Zero-Crossing Detector |
|
Use Scenario: Sensing mechanical insertion of PCMCIA Type III card (height ≤ 1.43 mm) via spring-contact voltage change. IC Role / Device Role / Timing Role: High-impedance presence detector; IN+ connected to card detect pin, IN− to 0.5 V reference. Use Value: Fits within 1.43 mm height constraint of PCMCIA spec; 0.04 pA input bias prevents false triggers from contact leakage currents. |
Use Scenario: Detecting AC line zero crossings in energy metering modules powered from rectified 12 V supply. IC Role / Device Role / Timing Role: Precision zero-crossing comparator; IN+ grounded, IN− driven by scaled AC waveform through high-value resistor. Use Value: Input range extending below ground (−0.2 V at 2.7 V supply) allows direct AC coupling without negative supply or bias network. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC7221BIM5X/NOPB | Higher 15 mV max input offset voltage (BI grade vs. AI grade); otherwise identical specs and pinout. | Suitable where ±15 mV threshold tolerance is acceptable (e.g., gross battery OK/LOW indication). | Select LMC7221BIM5X/NOPB only if cost sensitivity outweighs precision requirement; same footprint and layout. |
| TLV3701DBVR | Lower 1 μA supply current but slower 12 μs propagation delay; rail-to-rail input, open-drain output, same SOT-23-5 package. | Better for ultra-low-power sleep-mode monitoring; less suitable for sub-10 μs response-critical alarms. | Choose TLV3701DBVR when <1 μA quiescent current is mandatory and speed is secondary; verify pull-up compatibility. |
Compared with LMC7221AIM5X, the LMC7221BIM5X/NOPB trades offset precision for cost, while TLV3701DBVR prioritizes ultra-low current over speed-making LMC7221AIM5X optimal for balanced performance in space-constrained industrial monitors.
Availability
LMC7221AIM5X is available at Aetrix Electronics and suitable for battery voltage monitoring, mixed-voltage logic interfacing, PCMCIA presence detection, and low-power zero-crossing detection requiring stable component supply across industrial temperature ranges and long-lifecycle designs.
Supply support for LMC7221AIM5X 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 90 years of innovation in precision analog ICs and power management technologies.
The LMC7221AIM5X belongs to TI's Tiny Comparator family, engineered specifically for space- and power-constrained applications where rail-to-rail input, open-drain flexibility, and nanopower operation are essential-targeting portable instrumentation, sensor nodes, and compact industrial controls.
FAQ
What is the maximum supply voltage rating for LMC7221AIM5X?
The LMC7221AIM5X has an absolute maximum supply voltage (V+ – V−) of 16 V, with ensured operational performance up to 15 V. Exceeding 16 V risks permanent damage per the Absolute Maximum Ratings table in the SNOS748E datasheet. For reliable long-term operation, maintain V+ ≤ 15 V under all conditions including transients.
Does LMC7221AIM5X support true rail-to-rail input operation?
Yes, the LMC7221AIM5X supports input voltages from V− − 0.2 V to V+ + 0.3 V at 2.7 V supply, and V− − 0.2 V to V+ + 0.3 V at 5 V and 15 V supplies-verified in the Electrical Characteristics tables. This exceeds standard rail-to-rail definitions and enables direct sensing of signals at or slightly beyond supply rails without external clamping.
Can LMC7221AIM5X drive an LED directly?
Yes, the LMC7221AIM5X can sink up to 5 mA with VOL ≤ 0.4 V at 5 V supply, sufficient to drive low-current indicator LEDs (e.g., 2 mA @ 2 V forward voltage) when configured with a series current-limiting resistor and external pull-up to VCC_LED. Its 1.43 mm height also fits tight-profile LED mounting zones.
What is the input bias current specification for LMC7221AIM5X?
The LMC7221AIM5X has a typical input bias current of 0.04 pA at 25 °C, with no maximum limit specified-consistent with CMOS input architecture. This ultra-low value enables direct connection to megaohm-range timing resistors and high-impedance sensors without measurable voltage error or drift.
Is LMC7221AIM5X pin-compatible with LMC7221BIM5X/NOPB?
Yes, LMC7221AIM5X and LMC7221BIM5X/NOPB share identical 5-pin SOT-23 (DBV) packaging, pinout, and electrical interface. The only difference is the input offset voltage grade (5 mV max vs. 15 mV max); all other parameters-including supply range, propagation delay, and thermal ratings-are identical and interchangeable at the board level.
LMC7221AIM5X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 15V, ±1.35V ~ 7.5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.04pA @ 5V
- Current - Input Bias (Max):
- 30mA
- Current - Output (Typ):
- 14µA
- Current - Quiescent (Max):
- 75dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 10µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
LMC7221AIM5X FAQ
1.How can I place an order for LMC7221AIM5X through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7221AIM5X 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 LMC7221AIM5X reliable?
The price and inventory of LMC7221AIM5X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7221AIM5X is usually 5 days.
3.What payment methods are accepted for LMC7221AIM5X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7221AIM5X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7221AIM5X?
LMC7221AIM5X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7221AIM5X 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 LMC7221AIM5X?
For technical support, including LMC7221AIM5X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7221AIM5X requirements.
6.How does Aetrix verify that LMC7221AIM5X is sourced from the original manufacturer or authorized distributors?
All LMC7221AIM5X 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 LMC7221AIM5X meets industry standards.
7.What is the process for return or replacement of LMC7221AIM5X?
All LMC7221AIM5X units undergo pre-shipment inspection (PSI). If there is an issue with LMC7221AIM5X, 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 LMC7221AIM5X part is unused and in its original packaging.
Return procedure for LMC7221AIM5X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC7221AIM5X Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
