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Texas Instruments LM211PWR
- Part No.:
- LM211PWR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM211PWR.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,590
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Product details
Overview
LM211PWR from Texas Instruments is a single high-speed voltage comparator with open-collector output, designed for precision level detection and fast switching in industrial and embedded systems. It delivers 165 ns response time, supports ±15 V or single 5-V supply operation, and features strobe control and offset balancing - enabling use in zero-crossing detectors, peak detectors, and oscillator circuits.
For engineers reviewing the LM211PWR datasheet, LM211PWR pinout, LM211PWR application, or LM211PWR equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative options, and supply-chain support tailored for automotive-grade industrial designs requiring stable −40°C to +85°C operation.
Technical Context
The LM211PWR uses a PNP input stage enabling input common-mode range down to VCC− − 0.7 V, and a high-gain internal amplifier driving an isolated-emitter NPN open-collector output stage. Its strobe (BAL/STRB) pin allows external current-driven disable control (−3 mA to −5 mA), while BALANCE enables external offset trimming via resistor network.
Unlike standard comparators, the LM211PWR's emitter output (EMIT OUT) and collector output (COL OUT) are electrically isolated from VCC−, permitting load referencing to ground, VCC+, or VCC−. This supports direct interface with TTL, MOS, relays, and lamps up to 50 V / 50 mA without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response time | 165 ns high-to-low (±15 V, 100 mV step, 5 mV overdrive); enables sub-6 MHz comparator-based oscillators and fast edge detection. |
| Input offset voltage | Max 7.5 mV at 25°C; defines minimum detectable differential voltage before output switching - critical for precision threshold sensing. |
| Input bias current | Max 300 nA at full temperature range; ensures minimal loading on high-impedance sources like photodiodes or RC timing networks. |
| Supply voltage range | 3.5 V to 30 V total (VCC+ − VCC−); supports single 5-V logic rails and dual ±15-V op-amp supplies without redesign. |
| Output capability | Open-collector COL OUT sinks up to 50 mA at ≤1.5 V drop; drives relays, LEDs, or TTL directly with external pull-up. |
| Operating temperature | −40°C to +85°C; qualified for industrial and automotive body-control applications per TI Q-Temp specification. |
| Strobe input current | −3 mA to −5 mA required to disable output; prevents accidental grounding - mandates current-source drive, not voltage tie-down. |
Pinout & Package
TSSOP-8 package (3.00 mm × 4.40 mm), moisture-sensitive level 1, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: EMIT OUT | Emitter output terminal | Provides low-side switch node referenced to VCC−; used when load must be tied between VCC+ and output. |
| 2: IN+ | Noninverting input | Accepts reference or signal input; common-mode range extends to VCC− − 0.7 V for ground-referenced sensing. |
| 3: IN− | Inverting input | Accepts comparison signal; differential input voltage (IN+ − IN−) determines output state. |
| 4: VCC− | Negative supply rail | Reference for internal circuitry and EMIT OUT; supports dual-supply or single-supply (VCC− = GND) operation. |
| 5: BALANCE | Offset null terminal | Connects to external potentiometer for manual input offset compensation - improves DC accuracy in precision thresholds. |
| 6: BAL/STRB | Strobe control input | Current-sink input: pulling −3 mA disables output regardless of input differential - enables time-gated comparisons. |
| 7: COL OUT | Collector output terminal | Open-collector NPN output; requires external pull-up to define logic-high level and sink current into loads. |
| 8: VCC+ | Positive supply rail | Power for internal circuitry and pull-up target for COL OUT; supports up to 18 V absolute max. |
Key Features
| Feature | Design Value |
|---|---|
| Strobe-enabled output disable | Hardware-gated comparison via BAL/STRB current sink - eliminates need for external logic gating in time-multiplexed systems. |
| Isolated emitter-collector outputs | EMIT OUT and COL OUT operate independently of VCC− reference - enables floating-load switching and bidirectional supply interfacing. |
| Wide supply compatibility | Operates from 3.5 V to 30 V total supply range - interoperable with 5-V microcontrollers, ±15-V analog stages, and 24-V industrial rails. |
| High-voltage output drive | COL OUT switches up to 50 V at 50 mA - directly controls solenoids, incandescent lamps, and optocouplers without driver transistors. |
| Low input bias current | Max 300 nA across −40°C to +85°C - preserves signal integrity in high-Z sensor interfaces (e.g., thermistors, piezoelectric elements). |
Applications
| Zero-Crossing Detection | Oscillator Circuits |
|---|---|
Use Scenario: Detecting AC line voltage polarity transitions in power supplies and motor controllers. IC Role / Device Role / Timing Role: Voltage comparator comparing sine-wave input against 0 V reference to generate clean digital zero-cross pulses. Use Value: 165 ns response ensures accurate timing alignment; strobe capability allows synchronization with PWM cycles to reduce EMI. |
Use Scenario: Building free-running multivibrators and crystal oscillators for clock generation in legacy systems. IC Role / Device Role / Timing Role: Core switching element in hysteresis-based relaxation oscillators using RC feedback and COL OUT pull-up. Use Value: Open-collector output enables wired-OR configuration; wide supply range supports 5-V MCU clocks and ±12-V analog timing. |
| Peak Detection | Relay & Solenoid Control |
Use Scenario: Capturing maximum amplitude of analog signals in test equipment and battery monitoring. IC Role / Device Role / Timing Role: Comparator triggering sample-and-hold latch when input exceeds stored peak voltage. Use Value: Low input bias current prevents discharge of hold capacitor; BALANCE pin enables calibration to eliminate drift-induced error. |
Use Scenario: Driving electromagnetic relays and solenoids in HVAC controls, industrial PLC I/O modules, and automotive body electronics. IC Role / Device Role / Timing Role: High-current open-collector switch interfacing microcontroller GPIO to inductive 12–24 V loads. Use Value: 50 mA sink capability and 50 V breakdown allow direct relay coil drive; strobe function enables safe de-energization during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM311DR | Wider input offset voltage (max 7.5 mV vs. LM211PWR's 7.5 mV), but rated only for 0°C to +70°C industrial temp range. | Limited to commercial-grade systems; unsuitable for automotive or extended-temperature industrial deployments. | Select LM311DR only if ambient operating temperature stays within 0–70°C and cost is primary constraint. |
| TLV3011DBVR | Rail-to-rail input, 2.7–16 V supply, 200 ns response, but max sink current 20 mA and no strobe or BALANCE pins. | Lacks hardware strobe and offset trim - requires external circuitry for gated comparison or precision nulling. | Choose TLV3011DBVR for low-voltage battery-powered designs where size and quiescent current (<1 µA) outweigh strobe/trim needs. |
Compared with LM311DR and TLV3011DBVR, the LM211PWR uniquely combines −40°C to +85°C operation, strobe control, offset balancing, and 50 mA output drive - making it the only option among the three qualified for automotive body-control modules and industrial relay drivers requiring hardware-gated reliability.
Availability
LM211PWR is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and power supply monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM211PWR 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and automotive-qualified components.
The LM211PWR belongs to TI's legacy high-speed comparator product line, engineered for robust performance in noisy industrial environments and safety-critical automotive subsystems where reliability and parametric consistency are essential.
FAQ
What is the maximum supply voltage rating for the LM211PWR?
The LM211PWR has an absolute maximum supply voltage rating of 36 V total (VCC+ − VCC−), with individual rail limits of +18 V on VCC+ and −18 V on VCC−. Operating beyond these values risks permanent damage. For reliable long-term use, TI specifies 3.5 V to 30 V as the recommended operating range - supporting both single 5-V and dual ±15-V configurations without derating. The LM211PWR datasheet confirms these ratings under Absolute Maximum Ratings section 6.1.
Can the LM211PWR operate from a single 5-V supply?
Yes, the LM211PWR can operate from a single 5-V supply by connecting VCC− to ground and VCC+ to +5 V. Its input common-mode range extends to VCC− + 0.5 V, and its output remains functional with pull-up to 5 V. This configuration is explicitly supported in TI's datasheet Section 6.3 (Recommended Operating Conditions) and Application Note SLCS007K Figure 19 (TTL Interface With High-Level Logic). The LM211PWR maintains 165 ns response and 50 mA sink capability under 5-V operation.
How does the BAL/STRB pin function on the LM211PWR?
The BAL/STRB pin on the LM211PWR serves dual functions: as a strobe input to disable the output (when pulled to −3 mA to −5 mA), and as a balance control node when used with external resistors for offset trimming. TI's datasheet Section 5 and Figure 18 clarify that strobing requires current-sink drive - not voltage tie-down - and that the pin must never be shorted to ground. When unused, it should be left open or tied to VCC+ via resistor per Figure 17.
What is the purpose of the EMIT OUT pin on the LM211PWR?
The EMIT OUT pin on the LM211PWR provides an emitter-follower output referenced to VCC−, enabling load connection between VCC+ and EMIT OUT - useful when the load must be sourced from the positive rail rather than sunk to ground. Unlike COL OUT, EMIT OUT cannot be wire-OR'd but offers lower saturation voltage in high-side switching. TI's datasheet Section 5 and Functional Block Diagram (Section 8.2) confirm its isolation from VCC− and role in floating-load applications.
Does the LM211PWR support TTL and MOS logic interfacing?
Yes, the LM211PWR's open-collector COL OUT is fully compatible with TTL and MOS logic families. When pulled up to 5 V, it delivers logic-low <0.4 V and logic-high impedance matching standard TTL input thresholds. TI's datasheet Section 3 states output levels are "compatible with most TTL and MOS circuits," and Figure 19 demonstrates direct TTL interface. The 50 mA sink capability also supports driving multiple TTL inputs or MOS gate capacitances without buffering.
LM211PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL
- Voltage - Supply, Single/Dual (±):
- 3.5V ~ 30V, ±1.75V ~ 15V
- :
- 3mV @ ±15V
- Voltage - Input Offset (Max):
- 0.1µA @ ±15V
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 6mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-TSSOP
LM211PWR FAQ
1.How can I place an order for LM211PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM211PWR 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 LM211PWR reliable?
The price and inventory of LM211PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM211PWR is usually 5 days.
3.What payment methods are accepted for LM211PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM211PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM211PWR?
LM211PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM211PWR 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 LM211PWR?
For technical support, including LM211PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM211PWR requirements.
6.How does Aetrix verify that LM211PWR is sourced from the original manufacturer or authorized distributors?
All LM211PWR 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 LM211PWR meets industry standards.
7.What is the process for return or replacement of LM211PWR?
All LM211PWR units undergo pre-shipment inspection (PSI). If there is an issue with LM211PWR, 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 LM211PWR part is unused and in its original packaging.
Return procedure for LM211PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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