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Texas Instruments LMC7221AIM5
- Part No.:
- LMC7221AIM5
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMC7221AIM5.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,245
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Product details
Overview
LMC7221AIM5 from Texas Instruments is a micropower CMOS single comparator in 5-pin SOT-23 package, featuring rail-to-rail input, open-drain output, 7 μA typical supply current at 5V, 4 μs propagation delay (tPHL/tPLH) at 2.7V, and −40°C to +85°C operating temperature range. It serves as a precision voltage threshold detector in space-constrained, battery-powered systems requiring mixed-voltage interfacing.
For engineers reviewing the LMC7221AIM5 datasheet, LMC7221AIM5 pinout, LMC7221AIM5 application, or LMC7221AIM5 equivalent, key selection considerations include its 5 mV max input offset voltage (AI grade), open-drain output enabling level-shifting up to 15V, rail-to-rail input extending 200 mV beyond V−, and guaranteed operation from 2.7V to 15V supply.
Technical Context
The LMC7221AIM5 implements a CMOS input stage with ultra-low input bias current (0.04 pA typical) and rail-to-rail common-mode input range exceeding both supply rails-ensured down to −0.3 V below V− at 2.7V supply. Its open-drain output stage supports external pull-up to voltages independent of V+, enabling interoperability across 3.3V, 5V, and 15V logic domains.
Designed for low-power sensing, it delivers 75 dB common-mode rejection and 80 dB power supply rejection at 2.7V–15V, with input offset voltage drift limited to 1.0 μV/°C (5V supply) and 4.0 μV/°C (15V supply). Propagation delay remains stable across overdrive levels from 10 mV to 100 mV, supporting reliable timing in sensor wake-up and battery-monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 15 V - supports direct operation from single Li-ion, dual AA, or industrial 12 V rails without regulation. |
| Input Offset Voltage (max) | 5 mV - ensures accurate threshold detection within ±2.5 mV error at room temperature for AI-grade devices. |
| Supply Current (typ) | 7 μA at 5 V - extends battery life in always-on monitoring applications; enables multi-year operation on coin cells. |
| Propagation Delay | 4 μs at 2.7 V (100 mV overdrive) - provides predictable response for low-speed event detection without excessive latency. |
| Input Common-Mode Range | V− − 0.3 V to V+ + 0.3 V - allows direct sensing of signals near or slightly beyond supply rails, eliminating level-shifters. |
| Output Type | Open-drain - enables flexible pull-up to any voltage ≤15 V, critical for interfacing 5 V comparators with 3.3 V microcontrollers. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and portable consumer environments including notebooks and PCMCIA cards. |
Pinout & Package
LMC7221AIM5 is housed in a 5-pin SOT-23 package (DBV0005A), measuring 3.05 mm × 2.75 mm × 1.45 mm max height, optimized for high-density PCB layouts and thin-profile applications such as PDAs and mobile communications modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting Input | Accepts analog input signals; high-impedance node (0.04 pA bias) suitable for direct sensor connection. |
| 2 (GND) | Ground Reference | Return path for supply and output sink current; must be low-impedance to maintain noise immunity. |
| 3 (IN+) | Non-inverting Input | Differential input terminal; rail-to-rail common-mode range enables reference placement at V+ or V−. |
| 4 (V+) | Positive Supply | Power input pin; supports 2.7–15 V operation; decoupling capacitor required near pin for stability. |
| 5 (OUT) | Open-Drain Output | Sinks current only; requires external pull-up resistor to define logic-high voltage and slew rate. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range beyond supplies | Extends 0.3 V below V− and above V+, enabling direct monitoring of supply rails or current-sense resistors without attenuation. |
| 7 μA typical supply current | Reduces quiescent power to <35 μW at 5 V, making it viable for energy-harvesting and long-life battery systems. |
| 5 mV max input offset (AI grade) | Ensures consistent switching thresholds across production units, critical for precision window comparators and alarm triggers. |
| Open-drain output with 15 V tolerance | Permits interface with higher-voltage logic or optocouplers while powered from low-voltage rails-no level-shifter IC needed. |
| −40°C to +85°C temperature range | Validated performance across full industrial range, supporting deployment in automotive cabin modules and outdoor IoT sensors. |
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-battery warning or system shutdown. IC Role / Device Role / Timing Role: Precision threshold comparator comparing battery voltage against a stable reference. Use Value: Rail-to-rail input allows direct connection to battery; 5 mV offset ensures tight trip-point accuracy without calibration. |
Use Scenario: Interfacing a 5 V microcontroller's GPIO with a 3.3 V FPGA I/O bank using a shared interrupt line. IC Role / Device Role / Timing Role: Level-translating comparator generating active-low interrupt signal. Use Value: Open-drain output pulled to 3.3 V eliminates voltage translation ICs; 4 μs delay ensures timely edge detection. |
| PCMCIA Card Presence Detection | Low-Power Sensor Wake-Up |
Use Scenario: Detecting mechanical insertion of a PCMCIA card via contact closure, triggering host enumeration. IC Role / Device Role / Timing Role: High-impedance voltage comparator sensing card detect switch state. Use Value: 0.04 pA input bias prevents false triggering from leakage; 1.43 mm max height fits Type III card thickness constraints. |
Use Scenario: Waking a microcontroller from deep sleep when an ambient light sensor output exceeds 100 mV. IC Role / Device Role / Timing Role: Ultra-low-power analog front-end comparator enabling sub-μA standby current. Use Value: 7 μA supply current dominates total system sleep budget; rail-to-rail input accepts sensor output near ground. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC7221BIM5 | 15 mV max input offset voltage (BI grade), otherwise identical electrical specs and packaging. | Less precise threshold detection; suitable where cost sensitivity outweighs offset accuracy requirements. | Select LMC7221BIM5 only when ±7.5 mV trip-point tolerance is acceptable and B-grade qualification suffices. |
| TLV3701DBVR | Push-pull output (not open-drain), 1 μA supply current, 360 ns propagation delay, same SOT-23-5 package. | Cannot level-shift; requires matching supply voltage with load logic; faster but less flexible in mixed-voltage designs. | Choose TLV3701DBVR only when push-pull drive is mandatory and supply-domain alignment is guaranteed. |
Compared with LMC7221BIM5, the LMC7221AIM5 offers tighter offset control for precision sensing; versus TLV3701DBVR, it trades speed for open-drain flexibility and rail-to-rail input margin-making it superior for battery monitors and cross-voltage interfaces where timing slack exists.
Availability
LMC7221AIM5 is available at Aetrix Electronics and suitable for battery voltage monitoring, mixed-voltage logic interfacing, PCMCIA presence detection, and low-power sensor wake-up applications requiring stable component supply across industrial and portable product lifecycles.
Supply support for LMC7221AIM5 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 LMC7221AIM5 belongs to TI's Tiny Comparator family, engineered specifically for space- and power-constrained applications where rail-to-rail input, open-drain output, and micropower operation are essential-targeting portable, battery-powered, and industrial edge-sensing systems.
FAQ
What is the maximum supply voltage rating for the LMC7221AIM5?
The LMC7221AIM5 has an absolute maximum supply voltage (V+ – V−) of 16 V, with recommended operating range from 2.7 V to 15 V. Operation at 15 V is fully characterized per datasheet specifications, including input common-mode range up to 15.3 V and output sink capability with 5 kΩ pull-up. Exceeding 16 V risks permanent device damage.
Does the LMC7221AIM5 support rail-to-rail input operation?
Yes, the LMC7221AIM5 supports true rail-to-rail input operation with common-mode range extending 0.3 V beyond both supply rails-verified from V− − 0.3 V to V+ + 0.3 V at 2.7 V, 5 V, and 15 V supplies. This enables direct sensing of signals at or slightly outside V+ and V−, eliminating need for input attenuators or level shifters in supply-monitoring circuits.
What is the guaranteed input offset voltage for the LMC7221AIM5?
The LMC7221AIM5 is the AI-grade variant, with a guaranteed maximum input offset voltage of 5 mV at 25°C and −40°C to +85°C. Typical offset is 3 mV, and temperature drift is limited to 1.0 μV/°C at 5 V supply. This specification is ensured per production test and applies across the full operating temperature range.
Can the LMC7221AIM5 output drive an LED directly?
Yes-the LMC7221AIM5 open-drain output can sink up to 5 mA (ensured) with VOL ≤ 0.4 V at 5 V supply, sufficient to drive small, high-efficiency LEDs in indicator circuits. A series current-limiting resistor is required; for example, a 1 kΩ resistor with 5 V pull-up yields ~4.6 mA LED current. Do not short-circuit output to V+ above 12 V to avoid reliability degradation.
What package type and dimensions does the LMC7221AIM5 use?
The LMC7221AIM5 uses the 5-pin SOT-23 package (TI drawing DBV0005A), with body dimensions of 3.05 mm × 2.75 mm and maximum height of 1.45 mm. Pin 1 identifier is marked by a dot in the top-left corner; lead pitch is 0.95 mm. This footprint matches JEDEC MO-178 and supports standard SMT reflow profiles (MSL Level-1).
LMC7221AIM5 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
LMC7221AIM5 FAQ
1.How can I place an order for LMC7221AIM5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7221AIM5 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 LMC7221AIM5 reliable?
The price and inventory of LMC7221AIM5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7221AIM5 is usually 5 days.
3.What payment methods are accepted for LMC7221AIM5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7221AIM5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7221AIM5?
LMC7221AIM5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7221AIM5 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 LMC7221AIM5?
For technical support, including LMC7221AIM5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7221AIM5 requirements.
6.How does Aetrix verify that LMC7221AIM5 is sourced from the original manufacturer or authorized distributors?
All LMC7221AIM5 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 LMC7221AIM5 meets industry standards.
7.What is the process for return or replacement of LMC7221AIM5?
All LMC7221AIM5 units undergo pre-shipment inspection (PSI). If there is an issue with LMC7221AIM5, 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 LMC7221AIM5 part is unused and in its original packaging.
Return procedure for LMC7221AIM5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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