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Texas Instruments LM6511IM
- Part No.:
- LM6511IM
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM6511IM.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,411
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Product details
Overview
LM6511IM from Texas Instruments is a single high-speed voltage comparator with 180 ns propagation delay, operating from +2.7V to +30V supply, featuring open-collector output compatible with +5V CMOS, +3V CMOS, and TTL logic families. It delivers low power consumption (<9.45 mW at 2.7V) and supports analog-digital interface circuits in portable and battery-powered systems.
For engineers reviewing the LM6511IM datasheet, LM6511IM pinout, LM6511IM application, or LM6511IM equivalent, key selection considerations include its 180 ns response time, ±30V differential input voltage rating, −40°C to +85°C operating temperature range, strobe-enabled output disable function, and SOIC-8 package compatibility with industry-standard layout footprints.
Technical Context
The LM6511IM implements a rail-to-rail input-capable comparator core with internal strobe control logic that disables output when ≥3 mA is sunk from the STROBE pin. Its open-collector output allows wire-ORing and level-shifting across mixed-voltage domains without external level translators.
Designed for wide-supply flexibility, it maintains guaranteed performance from 2.7V to 30V while sustaining input common-mode range from 0.5 V to (V+ − 1.25 V), enabling direct sensing of signals referenced to system ground or mid-supply bias points in level-shifting topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 180 ns typical at 100 mV input step with 25 mV overdrive - enables fast decision-making in timing-critical digital interfaces. |
| Supply Voltage Range | 2.7V to 30V - supports operation from single-cell Li-ion (3.3V) up to industrial 24V rails without external regulators. |
| Input Offset Voltage | 5 mV max - ensures reliable detection of small analog thresholds in sensor interface and window-comparator applications. |
| Input Bias Current | 130 nA max - minimizes loading error on high-impedance sources such as photodiode amplifiers or RC timing networks. |
| Output Saturation Voltage | 0.4 V max at 8 mA sink - guarantees clean logic-low assertion even under moderate load conditions in mixed-voltage systems. |
| Common-Mode Rejection | 72 dB - suppresses noise coupling from shared supply or ground paths in noisy embedded environments. |
| Strobe Enable Current | 3–5 mA required to disable output - provides robust, current-driven control immune to voltage noise on enable lines. |
Pinout & Package
LM6511IM is housed in an 8-pin SOIC (Package D) with 1.27 mm pitch, 3.9 mm width, and 1.75 mm max height per JEDEC MS-012AA. Pin 1 is located at the top-left corner with notch or beveled edge marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting Input | Differential input node; accepts signals up to (V+ − 1.25 V); used for reference or threshold comparison. |
| 2 (IN+) | Non-inverting Input | Differential input node; accepts signals down to 0.5 V above ground; commonly tied to sensor or signal source. |
| 3 (STROBE) | Output Disable Control | Sink ≥3 mA to force output high-impedance state; not voltage-logic driven - requires current-source driver. |
| 4 (GND) | Negative Supply / Ground | Reference return path for inputs and internal circuitry; must be low-impedance connection to system ground plane. |
| 5 (OUT) | Open-Collector Output | Active-low output requiring external pull-up; compatible with 3V/5V logic families and enables wired-OR bus configurations. |
| 6 (V+) | Positive Supply | Primary power rail; supports 2.7V–30V; decoupling capacitor (0.1 µF) recommended near pin for AC stability. |
| 7 (NC) | No Connect | Internally unused; must remain unconnected - no routing or thermal tie to this pad. |
| 8 (NC) | No Connect | Internally unused; must remain unconnected - no routing or thermal tie to this pad. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range Operation | Functions reliably from 2.7V to 30V - eliminates need for dedicated voltage regulators in multi-rail systems. |
| Strobe-Controlled Output Disable | Current-sink strobe pin enables precise timing control of comparator output assertion in synchronized sampling systems. |
| Open-Collector Output Architecture | Supports level translation between 3V and 5V logic domains without external components - simplifies interconnect design. |
| Rail-to-Rail Input Common-Mode Range | Accepts inputs from 0.5 V to (V+ − 1.25 V) - accommodates direct connection to sensors or ADC references without biasing resistors. |
| Low Power Consumption | 3.5 mA max supply current at 2.7V - extends battery life in portable equipment where quiescent current is critical. |
Applications
| Portable Battery Monitoring | Universal Logic Level Shifting |
|---|---|
Use Scenario: Detecting low-battery condition in handheld devices using a resistor divider from Li-ion cell voltage. IC Role / Device Role / Timing Role: Comparator compares divided cell voltage against stable reference; strobe pin synchronizes detection to system sleep/wake cycles. Use Value: 180 ns response ensures rapid shutdown before deep discharge; 2.7V minimum supply allows operation down to end-of-life battery voltage. |
Use Scenario: Interfacing a 3.3V microcontroller GPIO to legacy 5V TTL peripherals in mixed-voltage embedded systems. IC Role / Device Role / Timing Role: Acts as bidirectional level translator by biasing IN+ to mid-supply and using open-collector OUT with dual pull-ups. Use Value: Eliminates need for discrete MOSFET translators; 72 dB CMRR rejects supply noise during voltage-domain crossing. |
| Cellular Phone Power Sequencing | Industrial Sensor Threshold Detection |
Use Scenario: Validating regulated DC/DC outputs before enabling downstream RF modules in cellular baseband subsystems. IC Role / Device Role / Timing Role: Compares monitored rail against precision reference; strobe input gates decision until power stabilization completes. Use Value: 30V absolute max supply rating tolerates transient overshoots during startup; NC pins simplify PCB layout in space-constrained modules. |
Use Scenario: Triggering alarm when thermistor-based temperature exceeds safety limit in motor drive control boards. IC Role / Device Role / Timing Role: Compares conditioned sensor voltage against fixed threshold; open-collector output drives optocoupler input for isolation. Use Value: 130 nA max input bias current prevents measurement drift in high-Z thermistor networks; −40°C to +85°C rating covers industrial ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Slower 1.3 µs response; no strobe pin; wider 2–36V supply range; higher 250 nA input bias current. | Lacks strobe-controlled output disable; less suitable for synchronized sampling but more tolerant of supply transients. | Select LM393DR only if strobe functionality is unnecessary and cost is primary constraint. |
| TLV3501CD | Faster 4.5 ns response; rail-to-rail output; 2.7–5.5V supply only; requires external pull-up for open-drain mode. | Better suited for high-speed ADC clocking or laser pulse detection; incompatible with >5.5V supplies or strobe-driven timing control. | Choose TLV3501CD when sub-10 ns timing is required and system operates strictly at 3.3V/5V. |
Compared with LM393DR and TLV3501CD, the LM6511IM uniquely balances 180 ns speed, strobe control, and 2.7–30V operation - making it optimal for portable and industrial systems needing synchronized, wide-supply analog-digital interfacing without redesigning power architecture.
Availability
LM6511IM is available at Aetrix Electronics and suitable for portable equipment, cellular phones, digital level shifting, and industrial sensor monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM6511IM 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM6511IM belongs to TI's precision analog comparator product line, designed specifically for low-power, wide-supply, strobe-controllable voltage comparison in portable and mixed-voltage embedded systems.
FAQ
What is the maximum supply voltage rating for the LM6511IM?
The LM6511IM has an absolute maximum supply voltage rating of +36V, but its guaranteed operating range is 2.7V to 30V per the datasheet's Operating Ratings table. Exceeding 30V may result in undefined behavior or reduced reliability, even if within absolute limits. Always refer to the Electrical Characteristics section for performance validation at specific voltages. The LM6511IM is rated for continuous operation up to 30V with full parameter guarantees across −40°C to +85°C.
Does the LM6511IM support rail-to-rail input operation?
Yes, the LM6511IM supports a wide input common-mode voltage range from 0.5 V to (V+ − 1.25 V), which enables effective rail-to-rail sensing in most practical configurations. This allows direct connection to sensors or dividers referenced to ground or mid-supply without external biasing. However, the exact usable range depends on supply voltage - for example, at 3V supply, inputs can swing from 0.5 V to 1.75 V. The LM6511IM does not support true 0 V to V+ input range, but its coverage meets requirements for most portable and industrial threshold-detection applications.
How is the STROBE pin on the LM6511IM intended to be driven?
The STROBE pin on the LM6511IM must be driven as a current sink - not a voltage logic input. To disable the output, 3–5 mA must be actively sunk from the STROBE pin to ground via an external current source (e.g., transistor switch or constant-current driver). Shorting STROBE directly to ground is prohibited and may damage the internal structure. When strobe current falls below 2 mA, the output resumes normal comparator operation. This current-driven interface ensures noise immunity in electrically noisy environments where the LM6511IM is commonly deployed.
Can the LM6511IM replace the LM339 in existing designs?
The LM6511IM cannot serve as a direct drop-in replacement for the LM339 because it is a single comparator with strobe control and different pinout, whereas the LM339 contains four comparators in one package with no strobe function. While both share open-collector outputs and wide supply ranges, the LM6511IM's SOIC-8 pinout (with two NC pins and dedicated STROBE) differs fundamentally from the LM339's SOIC-14 configuration. Replacing LM339 with LM6511IM would require board redesign, additional ICs for channel count matching, and revalidation of strobe timing integration. Use LM6511IM only in new single-comparator designs where its specific features are needed.
What is the purpose of the two NC pins on the LM6511IM SOIC-8 package?
The LM6511IM's Pins 7 and 8 are designated No Connect (NC) and must remain unconnected - they are not internally bonded and serve no electrical or thermal function. TI's package drawing and datasheet explicitly prohibit routing traces, placing vias, or applying solder to these pins. Leaving them floating avoids unintended coupling or parasitic effects. Unlike some "thermal pad" NC pins in other packages, these pins provide no thermal relief or grounding benefit; their presence maintains mechanical symmetry and alignment compatibility with standard SOIC-8 footprint tooling and pick-and-place equipment used in automated assembly of the LM6511IM.
LM6511IM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, Open-Collector, TTL
- Voltage - Supply, Single/Dual (±):
- 2.5V ~ 30V
- :
- 5mV @ 2.7V
- Voltage - Input Offset (Max):
- 0.13µA @ 2.7V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 3.5mA
- Current - Quiescent (Max):
- 72dB CMRR
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM6511IM FAQ
1.How can I place an order for LM6511IM through Aetrix?
Please submit a Request for Quotation (RFQ) for LM6511IM 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 LM6511IM reliable?
The price and inventory of LM6511IM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM6511IM is usually 5 days.
3.What payment methods are accepted for LM6511IM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM6511IM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM6511IM?
LM6511IM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM6511IM 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 LM6511IM?
For technical support, including LM6511IM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM6511IM requirements.
6.How does Aetrix verify that LM6511IM is sourced from the original manufacturer or authorized distributors?
All LM6511IM 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 LM6511IM meets industry standards.
7.What is the process for return or replacement of LM6511IM?
All LM6511IM units undergo pre-shipment inspection (PSI). If there is an issue with LM6511IM, 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 LM6511IM part is unused and in its original packaging.
Return procedure for LM6511IM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM6511IM Tags
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LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
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LM339PWR
Texas Instruments
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LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
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LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
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LM339APWR
Texas Instruments
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LM2903P
Texas Instruments
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LM393ADR
Texas Instruments
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NCX2200GMAZ
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