My Inquiry
My Account
Texas Instruments LMC6772AIN
- Part No.:
- LMC6772AIN
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LMC6772AIN.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,129
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LMC6772AIN from Texas Instruments is a dual micropower rail-to-rail input CMOS comparator with open-drain output, designed for ultra-low-power battery-operated systems. It delivers 10 μA max supply current per comparator, operates from 2.7 V to 15 V, and supports rail-to-rail input common-mode voltage range exceeding both supply rails - enabling direct sensing near ground or V+ in single-supply applications such as portable metering and handheld electronics.
For engineers reviewing the LMC6772AIN datasheet, LMC6772AIN pinout, LMC6772AIN application, or LMC6772AIN equivalent, key selection criteria include micropower operation (<25 μA total), open-drain flexibility for wired-OR logic and level-shifting, guaranteed rail-to-rail input performance at 2.7 V, propagation delay of 420 ns (100 mV overdrive, 5 V supply), and SOIC-8 packaging compatible with industrial temperature range (−40°C to +85°C).
Technical Context
The LMC6772AIN integrates two independent comparators sharing only power rails, each featuring rail-to-rail input stages with 20 fA typical input bias current and 75 dB CMRR. Its open-drain NMOS output stage allows external pull-up to any voltage ≤15 V, independent of the comparator's own supply - supporting logic-level translation between disparate voltage domains.
It includes internal ESD protection (1.5 kV HBM on outputs), short-circuit current limiting (40 mA), and operates reliably across −40°C to +85°C. The device is not AEC-Q100 qualified (that applies only to LMC6772Q variants), and its 8-pin SOIC package supports standard reflow profiles (MSL Level 1, 260°C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | Max 25 μA total (both comparators, output low) - enables multi-year battery life in always-on monitoring circuits. |
| Supply Voltage Range | 2.7 V to 15 V - supports single-cell Li-ion (3.0–4.2 V), 5 V logic, and 12 V industrial rails without level-shifting. |
| Input Common-Mode Range | Exceeds V− by 0.2 V min and V+ by 0.3 V max - permits direct interface to sensors or signals beyond supply rails, e.g., thermocouples or AC-coupled inputs. |
| Propagation Delay | 420 ns (low-to-high, 100 mV overdrive, 5 V supply) - sufficient for RC timers, window detectors, and multivibrator clock generation up to ~1 MHz. |
| Output Type | Open-drain NMOS - enables wired-OR bus configurations, flexible pull-up voltage selection (up to 15 V), and compatibility with TTL/CMOS/LVCMOS logic families. |
| Input Offset Voltage | Max 8 mV (LMC6772AI grade, 25°C) - suitable for precision threshold detection where reference voltages ≥50 mV are used. |
| ESD Tolerance | 1.5 kV HBM on output pins (pin 1 & 7), 2 kV on others - meets basic handling requirements for board assembly and field service. |
Pinout & Package
LMC6772AIN is housed in an 8-pin SOIC (D) package (3.91 mm × 4.90 mm), RoHS-compliant, with standard gull-wing lead form and MSL Level 1 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Open-drain output of Comparator A - requires external pull-up; sinks up to 40 mA; floats when high. |
| 2 | INA− | Inverting input of Comparator A - rail-to-rail capable; 20 fA bias current enables high-impedance sensor interfacing. |
| 3 | INA+ | Non-inverting input of Comparator A - same rail-to-rail and impedance specs as INA−. |
| 4 | V− | Negative supply pin - connects to ground in single-supply systems; supports split-rail operation down to −7.5 V. |
| 5 | INB+ | Non-inverting input of Comparator B - electrically identical to INA+; fully independent channel. |
| 6 | INB− | Inverting input of Comparator B - matches INA− specs; no crosstalk with Channel A. |
| 7 | OUTB | Open-drain output of Comparator B - independently controllable; supports separate pull-up networks. |
| 8 | V+ | Positive supply pin - accepts 2.7–15 V; powers both comparators; quiescent current scales linearly with V+. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Operates with inputs 0.2 V below V− and 0.3 V above V+, eliminating need for input biasing in single-supply sensor monitoring. |
| Ultra-low quiescent current | 25 μA max total supply current ensures >10-year battery life in coin-cell-powered alarm circuits with periodic wake-up. |
| Open-drain output architecture | Enables level translation between 1.8 V logic and 12 V control rails using a single external pull-up resistor. |
| Short-circuit protected outputs | 40 mA current limit prevents latch-up or damage during transient faults - critical for robustness in field-deployed metering hardware. |
| Wide temperature range support | Specified from −40°C to +85°C - validated for use in automotive cabin modules, industrial handheld testers, and outdoor metering enclosures. |
Applications
| Battery-Powered Sensor Monitoring | Logic-Level Translation |
|---|---|
|
Use Scenario: Detecting low-amplitude thermistor or photodiode signals in a handheld multimeter powered by two AA cells (3 V). IC Role / Device Role / Timing Role: Dual comparator performs window detection on analog sensor output, triggering LCD update only when threshold crossed. Use Value: Rail-to-rail input captures full sensor swing near ground and V+; 10 μA/channel current extends battery life to >2 years in standby mode. |
Use Scenario: Interfacing a 3.3 V microcontroller GPIO to a 5 V motor driver enable line in a portable power tool. IC Role / Device Role / Timing Role: LMC6772AIN acts as unidirectional level shifter: MCU output drives IN+; OUT pulls down 5 V line via 10 kΩ pull-up. Use Value: Open-drain output eliminates level-matching ICs; 420 ns propagation delay ensures timing-critical enable pulses remain sub-microsecond. |
| RC-Based Timing Circuits | Alarm & Threshold Detection |
|
Use Scenario: Generating precise 100 ms one-shot pulses in a smoke detector's self-test sequence using R-C network and internal reference. IC Role / Device Role / Timing Role: Configured as monostable multivibrator; comparator senses capacitor voltage crossing reference to trigger pulse edge. Use Value: Guaranteed 2.7 V operation enables direct use of depleted battery voltage; low input bias current prevents RC time constant drift. |
Use Scenario: Monitoring battery voltage in a medical glucose meter to initiate low-battery warning before shutdown. IC Role / Device Role / Timing Role: One comparator compares battery voltage against 2.8 V reference; second provides hysteresis to prevent chatter near threshold. Use Value: Input offset voltage ≤8 mV ensures accurate 2.8 V trip point; rail-to-rail input accommodates reference tied to V+ or ground. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6762AIMX/NOPB | Same pinout and rail-to-rail input, but push-pull (not open-drain) output; higher supply current (35 μA max). | Requires matched supply for output logic levels; unsuitable for wired-OR or mixed-voltage buses. | Select when deterministic high-state drive is needed and external pull-ups are undesirable. |
| TLV3702IDR | Lower input offset (3 mV max), faster propagation (350 ns), but narrower supply range (2.7–16 V) and no guaranteed rail-to-rail input at 2.7 V. | Higher precision thresholding possible, but may require input biasing in low-voltage single-supply designs. | Select when offset-critical window detection is required and supply is ≥3.3 V. |
Compared with LMC6772AIN, LMC6762AIMX/NOPB trades open-drain flexibility for stronger active-high drive, while TLV3702IDR improves speed and offset but sacrifices guaranteed rail-to-rail operation at minimum supply - making LMC6772AIN uniquely suited for ultra-low-voltage, open-bus, and battery-constrained applications.
Availability
LMC6772AIN is available at Aetrix Electronics and suitable for battery-powered handheld electronics, portable metering systems, and low-power alarm and monitoring circuits requiring stable component supply across extended production lifecycles.
Supply support for LMC6772AIN 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 for industrial, automotive, and personal electronics markets.
The LMC6772AIN belongs to TI's precision micropower comparator product line, engineered specifically for energy-constrained applications where rail-to-rail input operation, open-drain versatility, and sub-30 μA total supply current are mandatory design requirements.
FAQ
What is the maximum supply voltage for LMC6772AIN?
The absolute maximum supply voltage (V+ to V−) for LMC6772AIN is 16 V, but the recommended operating range is 2.7 V to 15 V. Operation at 15 V is fully characterized in the datasheet for parameters including propagation delay, output sinking capability, and input common-mode range. Exceeding 16 V risks permanent damage.
Does LMC6772AIN support true rail-to-rail input at 2.7 V supply?
Yes, LMC6772AIN guarantees rail-to-rail input common-mode voltage range at 2.7 V: inputs can extend to at least 0.2 V below V− and 0.3 V above V+ while maintaining CMRR >55 dB. This is explicitly verified in Section 5.3 of the datasheet and enables direct interface to ground-referenced sensors without bias networks.
Can LMC6772AIN outputs drive a 12 V load when powered from 3.3 V?
Yes - the open-drain NMOS output stage of LMC6772AIN allows the drain to be pulled up to any voltage ≤15 V, regardless of its own supply. When powered from 3.3 V, OUTA or OUTB can sink current from a 12 V rail via an external pull-up resistor, enabling level-shifting without additional components.
Is LMC6772AIN qualified for automotive applications?
No - LMC6772AIN is the industrial-grade variant (−40°C to +85°C). For automotive use, TI offers the LMC6772QMM/NOPB, which is AEC-Q100 qualified and specified over −40°C to +125°C. The LMC6772AIN lacks automotive qualification testing and is intended for commercial/industrial environments only.
What is the output short-circuit current limit of LMC6772AIN?
LMC6772AIN provides short-circuit protection with a nominal output sinking current limit of 40 mA. This is measured at V+ = 15 V with output pulled to 12 V. Continuous short-circuit operation is not recommended, especially at elevated ambient temperatures, as it may exceed the 150°C junction temperature limit.
LMC6772AIN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 15V, ±1.35V ~ 7.5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.04pA @ 5V
- Current - Input Bias (Max):
- 30mA
- Current - Output (Typ):
- 20µA
- Current - Quiescent (Max):
- 75dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 10µs
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- 8-PDIP
LMC6772AIN FAQ
1.How can I place an order for LMC6772AIN through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6772AIN 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 LMC6772AIN reliable?
The price and inventory of LMC6772AIN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6772AIN is usually 5 days.
3.What payment methods are accepted for LMC6772AIN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6772AIN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6772AIN?
LMC6772AIN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6772AIN 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 LMC6772AIN?
For technical support, including LMC6772AIN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6772AIN requirements.
6.How does Aetrix verify that LMC6772AIN is sourced from the original manufacturer or authorized distributors?
All LMC6772AIN 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 LMC6772AIN meets industry standards.
7.What is the process for return or replacement of LMC6772AIN?
All LMC6772AIN units undergo pre-shipment inspection (PSI). If there is an issue with LMC6772AIN, 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 LMC6772AIN part is unused and in its original packaging.
Return procedure for LMC6772AIN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC6772AIN Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
