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Texas Instruments LMC7221BIMX
- Part No.:
- LMC7221BIMX
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC7221BIMX.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,946
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Product details
Overview
LMC7221BIMX from Texas Instruments is a micropower CMOS single comparator with rail-to-rail input, open-drain output, 5 mV max input offset voltage, 7 μA typical supply current at 5V, and operation from 2.7V to 15V - used in battery-powered mixed-voltage sensing and low-power indicator circuits.
For engineers reviewing the LMC7221BIMX datasheet, LMC7221BIMX pinout, LMC7221BIMX application, or LMC7221BIMX equivalent, this page delivers verified package mapping (SOIC-8), confirmed operating temperature range (−40°C to +85°C), validated rail-to-rail input behavior, open-drain interface capability up to 15V pull-up, and real-world timing performance (4 μs propagation delay at 2.7V).
Technical Context
The LMC7221BIMX implements a CMOS input stage enabling rail-to-rail common-mode input range extending 0.2 V beyond both supply rails, with guaranteed operation down to 2.7V. Its open-drain output stage supports level-shifting across voltage domains - sinking up to 45 mA while allowing external pull-up to voltages independent of V+.
This device belongs to the LMC7221 family's "B" grade (15 mV max VOS), specified over −40°C to +85°C, and features ultra-low input bias current (0.04 pA typ) and high input impedance (>1012 Ω), making it suitable for high-impedance sensor interfacing without signal degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 15V - supports single-supply operation across battery discharge curves and mixed-voltage system interfaces. |
| Input Offset Voltage (max) | 15 mV - ensures reliable decision thresholds in precision threshold-detection applications like power monitoring. |
| Supply Current (typ) | 7 μA at 5V - enables multi-year battery life in portable devices such as PDAs and alarm sensors. |
| Propagation Delay | 4 μs at 2.7V, 100 mV overdrive - provides predictable timing for low-speed control loops and status flag generation. |
| Input Common-Mode Range | Extends 0.2 V below V− and 0.3 V above V+ - allows direct sensing of signals near supply rails without level-shifting circuitry. |
| Output Type | Open-drain - enables flexible logic-level translation (e.g., 5V comparator driving 3.3V MCU interrupt line via 3.3V pull-up). |
| ESD Tolerance | 2 kV HBM - meets standard handling requirements for board assembly in industrial and consumer environments. |
Pinout & Package
LMC7221BIMX is packaged in an 8-pin SOIC (Package Drawing D, JEDEC MS-012), 3.9 mm × 4.9 mm body, 1.75 mm height, RoHS-compliant, with moisture sensitivity level (MSL) Level-1 (260°C peak reflow).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−) | Accepts analog input signals; rail-to-rail capable, supports common-mode voltage down to −0.2 V (at 2.7V supply). |
| 2 | Non-Inverting Input (+) | Accepts reference or sensor signal; identical rail-to-rail input specification as Pin 1. |
| 3 | Ground (V−) | Reference return for single-supply operation; also serves as negative rail in split-supply configurations. |
| 4 | Output | Open-drain NMOS output - requires external pull-up resistor; sinks up to 45 mA; compatible with 15V pull-up. |
| 5 | NC | No internal connection - left unconnected per TI design; not to be tied to any potential. |
| 6 | V+ | Positive supply rail - accepts 2.7V to 15V; powers internal circuitry and defines upper input/output voltage limits. |
| 7 | NC | No internal connection - electrically isolated; must remain floating per datasheet guidance. |
| 8 | NC | No internal connection - no bond wire or die attachment; PCB pad may be omitted or grounded only if validated by layout simulation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Enables direct sensing of signals at or beyond supply rails - eliminates need for input attenuators or level shifters in power supply monitors. |
| 7 μA typical supply current | Reduces quiescent power in always-on battery circuits - extends operational lifetime in security sensors and remote telemetry nodes. |
| Open-drain output with 15V tolerance | Supports interoperability between disparate logic families (e.g., 5V comparator driving 1.8V/3.3V microcontroller inputs). |
| 0.04 pA typical input bias current | Preserves signal integrity when interfacing high-impedance sources (e.g., pH electrodes, piezoelectric sensors, RC timing networks). |
| Specified from −40°C to +85°C | Validates performance across automotive cabin, industrial control, and outdoor embedded environments without derating. |
Applications
| Battery Voltage Monitor | Mixed-Voltage Logic Interface |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in portable medical devices. IC Role / Device Role / Timing Role: Comparator compares sensed battery voltage against a precision reference to assert low-battery flag. Use Value: Rail-to-rail input allows direct measurement near 0V and 4.2V endpoints; 7 μA supply current minimizes self-discharge impact on battery runtime. |
Use Scenario: Generating interrupt signals from a 5V sensor subsystem to a 3.3V host MCU in IoT edge nodes. IC Role / Device Role / Timing Role: Level-translating comparator asserts active-low interrupt via 3.3V pull-up resistor. Use Value: Open-drain output safely interfaces across voltage domains without level-shifter ICs; 4 μs delay ensures timely response to fault conditions. |
| PCMCIA Card Power Sequencing | Low-Power LED Indicator Driver |
Use Scenario: Enabling 3.3V I/O power only after stable 5V main rail is detected in PCMCIA Type III cards. IC Role / Device Role / Timing Role: Window comparator (using dual LMC7221 variants) validates 5V rail within ±5% before enabling downstream regulator. Use Value: SOIC-8 footprint fits tight card-edge layouts; 1.75 mm height complies with Type III mechanical envelope; 15 mV VOS ensures accurate trip-point stability. |
Use Scenario: Driving status LEDs in handheld test equipment powered by coin-cell batteries. IC Role / Device Role / Timing Role: Comparator sinks LED current directly through open-drain output with series current-limiting resistor. Use Value: Eliminates discrete transistor driver; 45 mA sink capability supports multiple parallel LEDs; 7 μA quiescent current preserves battery capacity during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC7221AIMX/NOPB | Same SOIC-8 package and pinout; "A" grade with 5 mV max VOS (vs. 15 mV for LMC7221BIMX). | Preferred where tighter threshold accuracy is required - e.g., precision voltage window detection in instrumentation. | Select LMC7221AIMX/NOPB when offset voltage ≤5 mV is mandatory; otherwise LMC7221BIMX offers cost advantage for relaxed accuracy needs. |
| TLV3701CDR | Single open-drain comparator in SOIC-8; 1.8V–16V supply; 1.25 μs propagation delay; 650 nA supply current. | Better speed and lower power, but higher input offset (3.5 mV typ) and reduced rail-to-rail input margin (to V− +0.1V). | Choose TLV3701CDR for ultra-low-power, faster-response designs where input common-mode range beyond rails is not required. |
Compared with LMC7221AIMX/NOPB, LMC7221BIMX trades offset voltage precision for cost efficiency; compared with TLV3701CDR, it delivers superior rail-to-rail input capability and higher sink current at slightly higher quiescent power - making it optimal for robust mixed-voltage sensing where accuracy tolerances exceed ±10 mV.
Availability
LMC7221BIMX is available at Aetrix Electronics and suitable for battery-powered medical devices, industrial sensor nodes, PCMCIA peripherals, and low-power LED indicator systems requiring stable component supply across extended production lifecycles.
Supply support for LMC7221BIMX 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, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The LMC7221BIMX belongs to TI's precision analog comparator product line, engineered for space-constrained, low-power, mixed-voltage applications including portable instrumentation, power management, and sensor signal conditioning.
FAQ
What is the maximum supply voltage rating for LMC7221BIMX?
The LMC7221BIMX has an absolute maximum supply voltage (V+ – V−) of 16V, with recommended operating range from 2.7V to 15V. Operation at 15V is fully characterized per datasheet AC/DC specifications, including propagation delay, output sinking capability, and input common-mode range - ensuring reliable function in high-voltage industrial sensing applications.
Does LMC7221BIMX support rail-to-rail input operation?
Yes, LMC7221BIMX supports true rail-to-rail input operation: its common-mode voltage range extends 0.2 V below V− and 0.3 V above V+ at 2.7V supply, and similarly beyond rails at 5V and 15V. This enables direct interface with signals at supply extremes - critical for power supply monitoring and zero-crossing detection without external biasing.
Can LMC7221BIMX drive an LED directly?
Yes, LMC7221BIMX can directly drive low-current LEDs via its open-drain output: it sinks up to 45 mA, and with a series current-limiting resistor, reliably illuminates indicator LEDs in battery-powered devices. The 7 μA supply current ensures minimal impact on battery life - validated in TI's application note for LED driving circuits.
What is the input offset voltage specification for LMC7221BIMX?
The LMC7221BIMX is the "B" grade variant with a maximum input offset voltage (VOS) of 15 mV at 25°C, and 18 mV over full temperature range (−40°C to +85°C). This grade balances cost and performance for applications where sub-5 mV offset is unnecessary - such as general-purpose voltage threshold detection in consumer and industrial controls.
Is LMC7221BIMX pin-compatible with other comparators in SOIC-8 package?
LMC7221BIMX uses a non-standard SOIC-8 pinout with three NC pins (5, 7, 8); it is not pin-compatible with generic SOIC-8 comparators like LM393 or TLV3701. Direct replacement requires verification of pin functions - specifically, Pins 5/7/8 must remain unconnected, and output must be pulled up externally. Layout adaptation is required for drop-in substitution.
LMC7221BIMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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
- :
- 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
- :
- 8-SOIC
LMC7221BIMX FAQ
1.How can I place an order for LMC7221BIMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7221BIMX 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 LMC7221BIMX reliable?
The price and inventory of LMC7221BIMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7221BIMX is usually 5 days.
3.What payment methods are accepted for LMC7221BIMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7221BIMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7221BIMX?
LMC7221BIMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7221BIMX 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 LMC7221BIMX?
For technical support, including LMC7221BIMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7221BIMX requirements.
6.How does Aetrix verify that LMC7221BIMX is sourced from the original manufacturer or authorized distributors?
All LMC7221BIMX 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 LMC7221BIMX meets industry standards.
7.What is the process for return or replacement of LMC7221BIMX?
All LMC7221BIMX units undergo pre-shipment inspection (PSI). If there is an issue with LMC7221BIMX, 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 LMC7221BIMX part is unused and in its original packaging.
Return procedure for LMC7221BIMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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