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Texas Instruments LMC7221BIM5X
- Part No.:
- LMC7221BIM5X
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMC7221BIM5X.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,977
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Product details
Overview
LMC7221BIM5X from Texas Instruments is a micropower CMOS single comparator in 5-pin SOT-23 package with rail-to-rail input, open-drain output, 7 μA supply current at 5V, 4 μs propagation delay (tPHL/tPLH) at 2.7V, and 5 mV max input offset voltage (BI grade), used for battery-powered voltage monitoring and sensor interface circuits.
For engineers reviewing the LMC7221BIM5X datasheet, LMC7221BIM5X pinout, LMC7221BIM5X application, or LMC7221BIM5X equivalent, key selection criteria include its ultra-low quiescent current, rail-to-rail input beyond supply rails, open-drain output compatible with mixed-voltage logic, and guaranteed operation from 2.7V to 15V across −40°C to +85°C.
Technical Context
The LMC7221BIM5X implements a CMOS input stage enabling rail-to-rail common-mode input range extending 0.2 V beyond both supply rails, paired with an open-drain NMOS output stage capable of sinking up to 45 mA and supporting external pull-up voltages up to 15 V. Its micropower architecture achieves 7 μA typical supply current while maintaining 100 dB voltage gain and 75–82 dB PSRR across 2.7–15 V supplies.
This comparator operates without phase inversion even when inputs exceed supply rails-critical for direct battery sensing-and delivers 4 μs propagation delay at 2.7V with 100 mV overdrive, making it suitable for low-voltage timing, zero-crossing detection, and LED drive in space-constrained portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 15 V - supports single-supply operation across primary battery chemistries (Li-ion, alkaline, NiMH) without regulation. |
| Input Offset Voltage (max) | 15 mV - ensures reliable decision thresholds in precision threshold-detection applications like power-good monitoring. |
| Supply Current (typ) | 7 μA at 5 V - extends battery life in always-on sensor nodes and portable devices operating for years on coin cells. |
| Propagation Delay | 4 μs at 2.7 V (100 mV overdrive) - enables fast response in low-power wake-up and alarm circuits without sacrificing efficiency. |
| Input Common-Mode Range | V− − 0.2 V to V+ + 0.2 V - allows direct sensing of signals near or beyond supply rails, eliminating level-shifting components. |
| Output Type | Open-drain NMOS - permits flexible logic-level translation (e.g., 5 V comparator driving 3.3 V MCU GPIO) via external pull-up. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive cabin-temperature environments without derating. |
Pinout & Package
LMC7221BIM5X 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, RoHS-compliant, with moisture sensitivity level (MSL) 1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting Input | Differential input node accepting signals from −0.2 V to V+ + 0.2 V; high-impedance (0.04 pA bias current) for minimal loading of high-Z sources. |
| 2 (GND) | Ground Reference | Negative supply terminal for single-supply operation; must be low-impedance to maintain noise immunity and stable reference. |
| 3 (IN+) | Non-Inverting Input | Differential input node with identical rail-to-rail common-mode range as IN−; used for threshold comparison against reference or sensor signal. |
| 4 (V+) | Positive Supply | Single positive supply input (2.7–15 V); powers internal circuitry and defines upper common-mode limit. |
| 5 (OUT) | Open-Drain Output | NMOS drain output requiring external pull-up resistor; sinks up to 45 mA, supports voltage translation up to 15 V independent of V+. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input beyond supply rails | Accepts inputs 0.2 V below GND and 0.2 V above V+, enabling direct battery voltage monitoring without resistive dividers. |
| 7 μA typical supply current | Reduces average system power by >90% vs. standard comparators, critical for multi-year battery life in IoT endpoints. |
| Open-drain output with 15 V tolerance | Allows interfacing with higher- or lower-voltage logic families (e.g., 5 V comparator driving 3.3 V microcontroller interrupt line). |
| Guaranteed operation at 2.7 V | Ensures full functionality down to end-of-life battery voltage, eliminating need for brown-out reset circuitry in 3 V systems. |
| 0.04 pA input bias current | Permits use with megaohm-range timing resistors and high-impedance sensors (e.g., pH electrodes, photodiodes) without signal error. |
Applications
| Battery Voltage Monitor | Sensor Threshold Detector |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during discharge to trigger low-battery warning before cutoff. IC Role / Device Role / Timing Role: Comparator compares cell voltage against 3.0 V reference; output drives MCU GPIO or LED driver. Use Value: Rail-to-rail input enables direct connection to cell; 7 μA current minimizes load on aging battery; open-drain output interfaces cleanly with 3.3 V host MCU. |
Use Scenario: Detecting temperature threshold crossing using thermistor-based voltage divider in portable medical device. IC Role / Device Role / Timing Role: Compares thermistor divider output to fixed reference; triggers alarm or fan control logic. Use Value: 0.04 pA input bias avoids measurement error from high-resistance thermistor network; wide supply range accommodates varying battery voltage. |
| Zero-Crossing Detector | LED Indicator Driver |
|
Use Scenario: Generating timing pulses from AC line voltage for dimmer control in smart lighting modules. IC Role / Device Role / Timing Role: Compares AC waveform to ground reference; open-drain output pulls up to 5 V MCU input. Use Value: Input range extending below GND allows direct AC coupling with large series resistor; no external biasing required. |
Use Scenario: Driving status LED in handheld test equipment powered by 3.7 V Li-ion battery. IC Role / Device Role / Timing Role: Comparator output sinks LED current directly through open-drain output and current-limiting resistor. Use Value: 45 mA sink capability supports bright indicator LEDs; 7 μA quiescent current preserves battery runtime during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower open-drain comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC7221AIM5X/NOPB | AI grade: 5 mV max input offset voltage (vs. 15 mV for BI), otherwise identical specs and pinout. | Better accuracy for precision threshold detection; same footprint and supply requirements. | Select LMC7221AIM5X/NOPB when <5 mV offset is required; LMC7221BIM5X/NOPB preferred for cost-sensitive designs where 15 mV is acceptable. |
| TLV3701DBVR | Lower 550 nA supply current but slower 12 μs propagation delay; 1.8–16 V supply; rail-to-rail input; open-drain output. | Superior battery life in ultra-low-power wake-up circuits; less suitable for sub-10 μs timing-critical alarms. | Choose TLV3701DBVR for multi-year battery life in infrequently active systems; retain LMC7221BIM5X/NOPB for faster response in real-time monitoring. |
Compared with LMC7221AIM5X/NOPB, the LMC7221BIM5X/NOPB trades offset accuracy for cost; compared with TLV3701DBVR, it delivers 3× faster response at 3× higher quiescent current-making it optimal for mid-speed, cost-sensitive, battery-operated threshold detection where 15 mV offset is sufficient.
Availability
LMC7221BIM5X is available at Aetrix Electronics and suitable for battery-powered portable electronics, industrial sensor nodes, and embedded power-monitoring systems requiring stable component supply across long production lifecycles.
Supply support for LMC7221BIM5X 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.
The LMC7221BIM5X belongs to TI's Tiny Comparator family, designed specifically for space- and power-constrained portable and battery-operated applications requiring rail-to-rail input, micropower operation, and flexible output interfacing.
FAQ
What is the maximum supply voltage rating for the LMC7221BIM5X?
The LMC7221BIM5X 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 electrical specifications, including input common-mode range up to 15.2 V and output sink capability under load. Exceeding 16 V risks permanent damage.
Does the LMC7221BIM5X support true rail-to-rail input operation?
Yes, the LMC7221BIM5X supports input common-mode voltage from V− − 0.2 V to V+ + 0.2 V - verified across 2.7 V, 5 V, and 15 V supplies. This "beyond-the-rails" capability enables direct connection to battery terminals or sensor outputs without level-shifting resistors or op-amp buffers, simplifying design and reducing component count.
Can the LMC7221BIM5X drive an LED directly from its output pin?
Yes, the LMC7221BIM5X open-drain output can sink up to 45 mA, allowing direct LED drive with appropriate current-limiting resistor. At 5 V supply, it delivers 0.4 V low-level voltage with 5 mA load - sufficient for standard indicator LEDs. Ensure the external pull-up voltage does not exceed 15 V and that continuous current remains within datasheet limits to avoid thermal stress.
What is the input bias current specification for the LMC7221BIM5X?
The LMC7221BIM5X features an ultra-low input bias current of 0.04 pA (typical) at 25°C, confirmed across 2.7 V, 5 V, and 15 V supplies. This enables accurate interfacing with high-impedance sources such as thermistors, photodiodes, and RC timing networks without significant voltage error or time-constant drift.
Is the LMC7221BIM5X pin-compatible with other SOT-23 comparators?
The LMC7221BIM5X uses standard 5-pin SOT-23 pinout (IN−, GND, IN+, V+, OUT) per JEDEC MO-178 and TI DBV0005A. It is pin-compatible with LMC7221AIM5X/NOPB and LMC7221BIM5/NOPB. However, it is not pin-compatible with push-pull-output variants (e.g., LMC7211) or dual comparators due to differing pin functions and counts.
LMC7221BIM5X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 15V, ±1.35V ~ 7.5V
- :
- 15mV @ 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
LMC7221BIM5X FAQ
1.How can I place an order for LMC7221BIM5X through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7221BIM5X 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 LMC7221BIM5X reliable?
The price and inventory of LMC7221BIM5X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7221BIM5X is usually 5 days.
3.What payment methods are accepted for LMC7221BIM5X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7221BIM5X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7221BIM5X?
LMC7221BIM5X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7221BIM5X 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 LMC7221BIM5X?
For technical support, including LMC7221BIM5X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7221BIM5X requirements.
6.How does Aetrix verify that LMC7221BIM5X is sourced from the original manufacturer or authorized distributors?
All LMC7221BIM5X 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 LMC7221BIM5X meets industry standards.
7.What is the process for return or replacement of LMC7221BIM5X?
All LMC7221BIM5X units undergo pre-shipment inspection (PSI). If there is an issue with LMC7221BIM5X, 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 LMC7221BIM5X part is unused and in its original packaging.
Return procedure for LMC7221BIM5X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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