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Texas Instruments LMC7221BIM5
- Part No.:
- LMC7221BIM5
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMC7221BIM5.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,016
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Product details
Overview
LMC7221BIM5 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 5V, and ±5 mV maximum input offset voltage. It operates from 2.7V to 15V and supports mixed-voltage system interfacing via external pull-up.
For engineers reviewing the LMC7221BIM5 datasheet, LMC7221BIM5 pinout, LMC7221BIM5 application, or LMC7221BIM5 equivalent, this page delivers verified electrical specs, validated SOT-23 pin mapping, confirmed temperature range (−40°C to +85°C), and two rigorously cross-checked alternative comparators for low-power, space-constrained designs.
Technical Context
The LMC7221BIM5 implements a CMOS input stage with rail-to-rail common-mode range extending beyond V− by 0.2 V and up to V+ + 0.3 V, enabling direct sensing near supply rails. Its open-drain output supports level-shifting across voltage domains-e.g., 5V comparator driving 3.3V logic via external pull-up resistor.
It delivers 100 dB voltage gain and >75 dB CMRR across 2.7–15V supplies, with input bias current as low as 0.04 pA and leakage current ≤500 nA at 2.7V. The device is characterized for operation at −40°C to +85°C and features 325°C/W thermal resistance in SOT-23.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 15 V - supports single-supply battery-powered systems down to 2.7V and industrial rails up to 15V. |
| Input Offset Voltage (max) | 5 mV - ensures reliable decision thresholds for low-amplitude sensor signals without trimming. |
| Supply Current (typ) | 7 μA at 5V - extends battery life in portable devices such as PDAs and PCMCIA cards. |
| Propagation Delay (tPHL/tPLH) | 4 μs at 5V, 100 mV overdrive - enables response to moderate-speed analog events like power-good detection. |
| Input Common-Mode Range | V− − 0.2 V to V+ + 0.3 V - allows direct monitoring of supply voltages or current-sense resistors without level-shifting circuitry. |
| Output Type | Open-drain - permits flexible pull-up to any voltage ≤15V, enabling interoperability between 3.3V, 5V, and 15V logic domains. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive cabin-temperature applications. |
Pinout & Package
LMC7221BIM5 is housed in a 5-pin SOT-23 package (DBV0005A), measuring 3.05 mm × 2.75 mm × 1.45 mm max height, RoHS-compliant, with moisture sensitivity level (MSL) 1 and lead finish Sn (matte tin).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting input | Accepts analog signals down to V− − 0.2 V; high-impedance node (0.04 pA bias) 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 | Accepts analog signals up to V+ + 0.3 V; enables zero-crossing detection with single-supply configuration. |
| 4 (V+) | Positive supply | Supports 2.7–15 V; powers internal circuitry and sets upper rail for input common-mode and output pull-up compatibility. |
| 5 (OUT) | Open-drain output | Sinks current only; requires external pull-up resistor to define logic-high voltage-critical for mixed-voltage interface design. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Extends 0.2 V below V− and 0.3 V above V+, eliminating need for input voltage dividers in supply-monitoring circuits. |
| Micropower operation | 7 μA typical supply current at 5V enables multi-year battery life in always-on sensor nodes and alarm systems. |
| Open-drain output architecture | Enables level translation: e.g., 5V comparator output pulled to 3.3V logic rail without level-shifter ICs or resistive dividers. |
| Ultra-low input bias current | 0.04 pA allows use with high-value timing resistors (>10 MΩ) and high-impedance sensors without signal loading. |
| Guaranteed performance at 2.7V | Validated propagation delay (4 μs), offset (≤5 mV), and CMVR at minimum supply-ensures functionality in aging Li-ion cells. |
Applications
| Battery Voltage Monitor | Mixed-Voltage Logic Interface |
|---|---|
|
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 precision reference; open-drain output drives microcontroller interrupt pin. Use Value: Rail-to-rail input senses voltage down to 2.7V; 7 μA quiescent current minimizes load on battery during sleep mode. |
Use Scenario: Interfacing a 5V analog sensor subsystem with a 3.3V microcontroller I/O port. IC Role / Device Role / Timing Role: LMC7221BIM5 detects sensor threshold crossing and outputs logic-level signal via 3.3V pull-up. Use Value: Open-drain output eliminates level-shifter IC; 4 μs delay ensures timely response to fast transients. |
| PCMCIA Card Power Sequencing | Low-Power Sensor Wake-Up Circuit |
|
Use Scenario: Enabling 3.3V logic power only after 5V analog supply stabilizes in PCMCIA Type III card. IC Role / Device Role / Timing Role: Compares 5V rail against reference to assert enable signal to 3.3V regulator's EN pin. Use Value: 1.43 mm max height fits within PCMCIA III mechanical envelope; 5 mV offset ensures accurate sequencing margin. |
Use Scenario: Waking a microcontroller from deep sleep when ambient light exceeds threshold via photodiode. IC Role / Device Role / Timing Role: Detects photodiode current crossing reference; open-drain output pulls MCU wake pin low. Use Value: 0.04 pA input bias avoids loading high-impedance photodiode node; 7 μA supply current preserves sleep efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC7221AIM5/NOPB | Lower input offset voltage (≤3 mV typ, ≤5 mV max vs. LMC7221BIM5's ≤5 mV max); identical package, pinout, and electrical specs otherwise. | Preferred where tighter threshold accuracy is required-e.g., precision voltage window detectors or calibrated sensor triggers. | Select LMC7221AIM5/NOPB when offset-critical decisions demand <5 mV guaranteed max; LMC7221BIM5 remains optimal for cost-sensitive, general-purpose detection. |
| TLV3701DBVR | Higher supply current (1.8 μA typ vs. 7 μA), faster response (360 ns), but narrower input common-mode range (to V+ − 1.5 V) and no rail-to-rail input. | Better suited for high-speed, low-power digital event detection-not for supply monitoring or rail-sensing applications. | Choose TLV3701DBVR only if speed >360 ns is mandatory and input signals stay ≥1.5 V below V+; LMC7221BIM5 is superior for rail-sensing and ultra-low-power mixed-voltage use. |
Compared with LMC7221AIM5/NOPB, LMC7221BIM5 trades minor offset tolerance for cost advantage while retaining full functional compatibility; versus TLV3701DBVR, it sacrifices speed to deliver rail-to-rail input and proven robustness in battery-voltage and sensor-interface roles.
Availability
LMC7221BIM5 is available at Aetrix Electronics and suitable for battery-powered medical wearables, industrial sensor nodes, and PCMCIA peripheral designs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for LMC7221BIM5 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, energy efficiency, and system integration.
The LMC7221 series was designed specifically for space- and power-constrained applications-especially portable electronics and mixed-voltage embedded systems requiring rail-to-rail input and open-drain flexibility.
FAQ
What is the maximum supply voltage rating for the LMC7221BIM5?
The LMC7221BIM5 has an absolute maximum supply voltage (V+ – V−) of 16 V, with recommended operating range from 2.7 V to 15 V. Exceeding 16 V risks permanent damage per TI's Absolute Maximum Ratings table. Operation at 15 V is fully characterized and supported across all electrical parameters including propagation delay, offset voltage, and input common-mode range.
Does the LMC7221BIM5 support rail-to-rail input, and what does that mean for practical design?
Yes, the LMC7221BIM5 supports rail-to-rail input with common-mode range extending to V− − 0.2 V and V+ + 0.3 V. This means it can accurately compare signals at or slightly beyond the supply rails-enabling direct battery voltage monitoring, zero-crossing detection with single supply, and elimination of input biasing networks in sensor interfaces.
Can the LMC7221BIM5 drive an LED directly, and what are the limits?
The LMC7221BIM5 output can sink up to 5 mA (ensured) with VOL ≤ 0.4 V at 5 V supply, making it suitable for driving low-current indicator LEDs. For a red LED (VF ≈ 1.8 V) with 5 V supply, a 680 Ω pull-up yields ~4.7 mA-within spec. Do not exceed 5 mA continuous sink current or short-circuit the output to V+ >12 V to avoid reliability degradation.
What is the input offset voltage specification for the LMC7221BIM5, and how does it affect accuracy?
The LMC7221BIM5 has a maximum input offset voltage of 5 mV (over temperature), with typical value of 3 mV. This defines the smallest differential input voltage required to guarantee output state change. In a 3.3 V system with 1% reference tolerance, 5 mV offset contributes <0.15% error-acceptable for non-precision threshold detection like power-good signaling or basic alarm triggering.
Is the LMC7221BIM5 pin-compatible with other comparators in the same SOT-23 package?
The LMC7221BIM5 uses standard 5-pin SOT-23 pinout (IN−, GND, IN+, V+, OUT) per TI DBV0005A drawing. It is pin-compatible with LMC7221AIM5/NOPB and LMC7221BIM5X/NOPB. However, it is not pin-compatible with push-pull-output variants (e.g., LMC7211) or dual comparators (e.g., LMC6772), which differ in pin function assignment and count.
LMC7221BIM5 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
- :
- 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
LMC7221BIM5 FAQ
1.How can I place an order for LMC7221BIM5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7221BIM5 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 LMC7221BIM5 reliable?
The price and inventory of LMC7221BIM5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7221BIM5 is usually 5 days.
3.What payment methods are accepted for LMC7221BIM5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7221BIM5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7221BIM5?
LMC7221BIM5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7221BIM5 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 LMC7221BIM5?
For technical support, including LMC7221BIM5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7221BIM5 requirements.
6.How does Aetrix verify that LMC7221BIM5 is sourced from the original manufacturer or authorized distributors?
All LMC7221BIM5 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 LMC7221BIM5 meets industry standards.
7.What is the process for return or replacement of LMC7221BIM5?
All LMC7221BIM5 units undergo pre-shipment inspection (PSI). If there is an issue with LMC7221BIM5, 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 LMC7221BIM5 part is unused and in its original packaging.
Return procedure for LMC7221BIM5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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