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Analog Devices Inc./Maxim Integrated MAX9077EUA+
- Part No.:
- MAX9077EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9077EUA+.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,328
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Product details
Overview
MAX9077EUA+ from Maxim Integrated is a dual, rail-to-rail input/output comparator optimized for ultra-low-power, single-supply portable systems. It delivers 580ns propagation delay at just 3µA per comparator, operates from 2.1V to 5.5V, and features ground-sensing inputs with -0.2V to VCC–1.2V common-mode range - enabling direct battery-voltage threshold detection in wearables and sensor nodes.
For engineers reviewing the MAX9077EUA+ datasheet, MAX9077EUA+ pinout, MAX9077EUA+ application, or MAX9077EUA+ equivalent, this page provides verified electrical parameters, µMAX® package terminal mapping, real-world interface behavior with TTL/CMOS loads, and validated alternatives for low-power dual-comparator designs requiring sub-1µA quiescent current scalability.
Technical Context
The MAX9077EUA+ integrates two independent comparators sharing a single 2.1V–5.5V supply, each with push-pull output drivers capable of sourcing/sinking 2mA while maintaining rail-to-rail swing. Its input stage lacks differential clamping, permitting rail-to-rail differential input voltage (±VCC) without phase inversion - critical for overdriven signal conditioning in IR receivers and digital line receivers.
Propagation delay is tightly specified at 580ns (typ) with 100mV overdrive and 10pF load, and supply current remains stable across temperature (±0.5µA variation from –40°C to +85°C). Input offset voltage is ±1mV (max), and CMRR reaches 82dB (min) - supporting accurate DC thresholding in noisy industrial sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.1V to 5.5V - enables direct operation from single Li-ion cell (2.7–4.2V) or 3.3V/5V rails without regulation. |
| Quiescent Current | 3µA per comparator - allows continuous monitoring in battery-powered systems with multi-year runtime (e.g., 220mAh coin cell lasts >8 years at 1Hz wake-up). |
| Propagation Delay | 580ns (typ) - supports reliable edge detection up to ~1.2MHz input transition rates in digital line receivers. |
| Input Common-Mode Range | –0.2V to VCC–1.2V - permits ground-referenced sensing (e.g., battery voltage monitoring down to 0V) without level-shifting. |
| Output Drive Capability | Rail-to-rail swing into 2mA load - directly interfaces standard TTL/CMOS logic without external pull-ups or level translators. |
| Input Offset Voltage | ±1mV (max) - ensures ≤10mV error in 10mV-threshold applications like low-voltage brownout detection. |
| CMRR / PSRR | 82dB / 77dB (min) - maintains accuracy in high-noise environments (e.g., motor-driven keyless entry modules). |
Pinout & Package
The MAX9077EUA+ is housed in an 8-pin µMAX® package (3mm × 3mm, 0.8mm height), RoHS-compliant and pin-compatible with industry-standard SO-8 and SOT23-8 footprints but with reduced board area. Its thermal resistance (θJA) is 4.5mW/°C derating above +70°C, supporting 362mW max power dissipation at ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Push-pull output of Comparator A - sinks/source up to 2mA, no external pull-up required for CMOS/TTL interfacing. |
| 2 | INA− | Inverting input of Comparator A - accepts voltages down to –0.2V, enabling true ground-sensing configurations. |
| 3 | INA+ | Noninverting input of Comparator A - differential input voltage unrestricted by internal clamp diodes. |
| 4 | GND | Analog/digital ground reference - shared return for both comparators and output drivers. |
| 5 | VCC | Positive supply pin - powers both comparators and outputs; decoupling with 10nF capacitor required near pin. |
| 6 | INB+ | Noninverting input of Comparator B - electrically isolated from INA±; supports independent threshold setting. |
| 7 | INB− | Inverting input of Comparator B - identical common-mode and overvoltage tolerance as INA± pins. |
| 8 | OUTB | Push-pull output of Comparator B - independently driven; no crosstalk or shared output-stage contention. |
Key Features
| Feature | Design Value |
|---|---|
| No output phase inversion on overdrive | Guaranteed rail-to-rail differential input (±VCC) without output polarity reversal - eliminates false triggers in fast transient detection. |
| Rail-to-rail output swing | VOH = VCC–0.4V, VOL = 0.4V @ 2mA - meets TTL high/low thresholds across full supply range (2.1–5.5V). |
| Ultra-low dynamic supply-current surge | Internal shoot-through current limiting prevents >1µA transient spikes during output switching - preserves battery life in burst-mode sensing. |
| Continuous short-circuit tolerance | Outputs withstand indefinite short to GND or VCC without damage - simplifies fault-tolerant design in automotive body-control modules. |
| Wide common-mode input range | –0.2V to VCC–1.2V - enables direct connection to battery terminals or shunt resistors without external bias networks. |
Applications
| Battery Voltage Monitoring | IR Signal Demodulation |
|---|---|
|
Use Scenario: Real-time detection of Li-ion cell voltage drop below 3.0V to trigger low-battery warning in wireless earbuds. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel monitors upper threshold (4.2V), second monitors lower threshold (3.0V). Use Value: 3µA total quiescent current extends standby time beyond 18 months on a 150mAh battery; ground-sensing inputs eliminate need for resistor dividers. |
Use Scenario: Converting modulated 38kHz IR carrier bursts from remote controls into clean digital pulses for microcontroller decoding. IC Role / Device Role / Timing Role: High-speed comparator with 580ns delay acting as zero-crossing detector - converting analog IR photodiode output to square wave. Use Value: Rail-to-rail output swing ensures full logic-level compliance with 3.3V MCU GPIOs; no external pull-up saves BOM cost and PCB space. |
| Digital Line Receiver | Threshold Discriminator in Sensor Nodes |
|
Use Scenario: Receiving RS-232-like signals at 9600 baud from legacy industrial equipment using only 3.3V supply. IC Role / Device Role / Timing Role: Comparator comparing received signal against mid-rail reference (1.65V) to regenerate clean UART data stream. Use Value: 580ns propagation delay supports reliable sampling at 9600 baud (104µs bit period); CMRR >82dB rejects common-mode noise on long cables. |
Use Scenario: Detecting magnetic field crossings in a Hall-effect-based door position sensor for smart locks. IC Role / Device Role / Timing Role: Dual comparator implementing hysteresis-based Schmitt trigger - one channel for open-circuit detection, second for closed-circuit confirmation. Use Value: ±1mV max input offset ensures <5mV hysteresis window accuracy; 2.1V minimum supply allows operation during brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV7235M5X | Higher supply current (32µA vs. 3µA), faster propagation (4.5ns), but requires ≥2.7V supply and lacks ground-sensing inputs. | Better for high-speed clock/data recovery; unsuitable for sub-2.7V battery monitoring or ground-referenced sensing. | Select LMV7235M5X only when speed >100MHz is required and power budget allows 10× higher current. |
| TLV3702IDR | Lower supply current (1.8µA), rail-to-rail I/O, but limited common-mode range (0.2V to VCC–0.2V) and no guaranteed short-circuit tolerance. | Valid for low-power sensor interfaces where inputs stay above 0.2V; cannot replace MAX9077EUA+ in battery-terminal sensing. | Choose TLV3702IDR for ultra-low-quiescent applications with buffered inputs; avoid in direct-battery or fault-prone environments. |
Compared with LMV7235M5X and TLV3702IDR, the MAX9077EUA+ uniquely balances nanosecond-class delay, true ground-sensing capability, and 3µA quiescent current - making it the only option for dual-threshold detection in energy-harvesting or coin-cell-powered systems requiring direct battery voltage access.
Availability
MAX9077EUA+ is available at Aetrix Electronics and suitable for battery-powered systems, IR receivers, digital line receivers, and threshold discriminators requiring stable component supply, long-term lifecycle support, and RoHS-compliant µMAX® packaging.
Supply support for MAX9077EUA+ 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-reliability ICs for industrial, medical, and portable applications.
The MAX9075/MAX9077 family was designed specifically for ultra-low-power, space-constrained portable electronics - delivering high-speed comparison with micropower efficiency and robust input/output architecture for direct battery interfacing.
FAQ
What is the maximum operating temperature range for the MAX9077EUA+?
The MAX9077EUA+ is rated for operation from –40°C to +85°C, as confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official datasheet. This industrial temperature grade supports deployment in automotive cabin modules, outdoor IoT sensors, and handheld test equipment without derating. The device's supply current and propagation delay remain within specification across this full range, with typical ICC variation less than ±0.5µA and tPD shift under ±50ns.
Does the MAX9077EUA+ require external pull-up resistors on its outputs?
No, the MAX9077EUA+ does not require external pull-up resistors because it features push-pull output stages that actively drive both high and low states. Each output (OUTA and OUTB) can source up to 2mA and sink up to 2mA while maintaining rail-to-rail swing - meeting TTL and CMOS logic thresholds directly. This eliminates BOM cost, reduces PCB footprint, and avoids timing uncertainty introduced by RC time constants from external resistors.
Can the MAX9077EUA+ safely interface with inputs below ground (negative voltages)?
Yes, the MAX9077EUA+ supports a common-mode input voltage range extending to –0.2V, allowing safe connection to slightly negative signals such as those from AC-coupled sensors or mismatched ground references. However, absolute maximum ratings limit any pin to –0.3V relative to GND, so sustained operation below –0.2V is not recommended. The absence of differential clamping diodes prevents latch-up during brief negative excursions.
How does the MAX9077EUA+ handle overdriven inputs without output phase inversion?
The MAX9077EUA+ guarantees no output phase inversion even when differential input voltage exceeds the common-mode range - a result of its unclamped input architecture. Unlike comparators with internal ESD diodes between inputs, the MAX9077EUA+ allows rail-to-rail differential swings (±VCC) while preserving correct output polarity. This behavior is explicitly tested and documented in the datasheet's "No Output Phase Inversion for Overdriven Inputs" feature list and verified across –40°C to +85°C.
Is the MAX9077EUA+ pin-compatible with other 8-pin comparator packages?
The MAX9077EUA+ uses the proprietary µMAX® 8-pin package (3mm × 3mm), which shares the same pinout as standard 8-pin SO and SOT23-8 variants of the MAX9077 family (e.g., MAX9077ESA+, MAX9077EKA+T), but differs mechanically from generic SO-8 or MSOP-8 footprints. While electrical pin functions match, PCB land patterns must follow Maxim's documented µMAX® outline (Outline No. 21-0036) - not generic SO-8 - to ensure solder joint reliability and thermal performance.
MAX9077EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2.1V ~ 5.5V
- :
- 1mV @ 5V
- Voltage - Input Offset (Max):
- 0.005µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 6.6µA
- Current - Quiescent (Max):
- 82dB CMRR, 77dB PSRR
- CMRR, PSRR (Typ):
- 580ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-uMAX/uSOP
MAX9077EUA+ FAQ
1.How can I place an order for MAX9077EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9077EUA+ 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 MAX9077EUA+ reliable?
The price and inventory of MAX9077EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9077EUA+ is usually 5 days.
3.What payment methods are accepted for MAX9077EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9077EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9077EUA+?
MAX9077EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9077EUA+ 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 MAX9077EUA+?
For technical support, including MAX9077EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9077EUA+ requirements.
6.How does Aetrix verify that MAX9077EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX9077EUA+ 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 MAX9077EUA+ meets industry standards.
7.What is the process for return or replacement of MAX9077EUA+?
All MAX9077EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9077EUA+, 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 MAX9077EUA+ part is unused and in its original packaging.
Return procedure for MAX9077EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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