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Analog Devices Inc./Maxim Integrated MAX9077EKA+T
- Part No.:
- MAX9077EKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-8
- Datasheet:
-
MAX9077EKA+T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,476
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Product details
Overview
MAX9077EKA+T 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 monitoring in wearables and sensor nodes.
For engineers reviewing the MAX9077EKA+T datasheet, MAX9077EKA+T pinout, MAX9077EKA+T application, or MAX9077EKA+T equivalent, this device is selected for precision threshold detection where supply current < 4µA, propagation delay < 600ns, and rail-to-rail output swing into 2mA loads are required in space-constrained 8-pin SOT23 layouts.
Technical Context
The MAX9077EKA+T integrates two independent comparators with push-pull outputs and no internal differential input clamp - allowing true rail-to-rail differential input voltage operation. Its BiCMOS process enables stable 3µA quiescent current across -40°C to +85°C while maintaining ±1mV typical input offset voltage and 60dB CMRR.
Output stage design suppresses shoot-through current during switching, minimizing dynamic supply surges. Input bias current is typically -5nA, and input capacitance is 3pF - supporting high-impedance sensing without significant loading or phase inversion under overdrive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 3µA per comparator - enables multi-year battery life in coin-cell-powered devices |
| Propagation Delay | 580ns (typ) - supports fast edge detection in IR receivers and digital line receivers |
| Supply Voltage Range | 2.1V to 5.5V - compatible with single Li-ion, 3V primary cells, and 5V logic rails |
| Input Common-Mode Range | -0.2V to VCC–1.2V - allows ground-referenced input sensing without level-shifting |
| Output Swing | Rail-to-rail with ±2mA drive - directly interfaces TTL/CMOS logic without pull-ups |
| Input Offset Voltage | ±1mV (max) - ensures accurate threshold discrimination down to sub-mV hysteresis |
| Input Bias Current | -5nA (typ) - minimizes error in high-impedance voltage divider networks |
Pinout & Package
MAX9077EKA+T is housed in an 8-pin SOT23 package (package code K8+2), measuring 4.9mm × 2.8mm × 1.3mm with gull-wing leads and RoHS-compliant matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Push-pull output of Comparator A - sinks/sourced up to 2mA, rail-to-rail swing |
| 2 | INA− | Inverting input of Comparator A - accepts voltages from -0.2V to VCC–1.2V |
| 3 | INA+ | Noninverting input of Comparator A - same common-mode range as INA− |
| 4 | GND | Analog/digital ground reference - shared return for both comparators and supply |
| 5 | VCC | Positive supply pin - powers both comparators; decoupling capacitor required at pin |
| 6 | INB+ | Noninverting input of Comparator B - electrically identical to INA+ |
| 7 | INB− | Inverting input of Comparator B - no differential clamp to INA+/INA− |
| 8 | OUTB | Push-pull output of Comparator B - independent, fully buffered, no phase inversion |
Key Features
| Feature | Design Value |
|---|---|
| No differential input clamp | Enables rail-to-rail differential input voltage (e.g., INB+ = VCC, INB− = GND) without damage or inversion |
| Ground-sensing inputs | Common-mode range extends to -0.2V, allowing direct connection to 0V-referenced sensors |
| Rail-to-rail outputs | Drives 2mA loads from GND to VCC - eliminates need for external pull-up resistors in logic interfacing |
| No output phase inversion | Maintains correct polarity even when inputs are overdriven beyond common-mode limits |
| Ultra-small footprint | 8-pin SOT23 occupies < 14 mm² PCB area - ideal for compact IoT endpoints and wearable modules |
Applications
| Battery-Voltage Monitor | IR Signal Detector |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during discharge to trigger low-battery shutdown before cutoff. IC Role / Device Role / Timing Role: Dual comparator configured as window detector - one channel for upper threshold (4.2V), one for lower (3.0V). Use Value: 3µA total quiescent current extends system sleep-mode runtime; rail-to-rail outputs directly drive enable pins of PMICs without level translation. |
Use Scenario: Demodulating 38kHz modulated IR carrier pulses from remote controls in smart home sensors. IC Role / Device Role / Timing Role: High-speed comparator with 580ns delay acting as zero-crossing detector on bandpass-filtered IR signal. Use Value: Fast propagation enables reliable pulse-width discrimination at >10kbps data rates; low input bias avoids DC drift in AC-coupled front-end. |
| Digital Line Receiver | Threshold Discriminator |
|
Use Scenario: Converting noisy RS-232 or UART signals from long cables into clean CMOS logic levels in industrial gateways. IC Role / Device Role / Timing Role: Comparator with hysteresis (externally added) rejecting EMI-induced glitches on serial lines. Use Value: 60dB CMRR rejects common-mode noise on unshielded traces; push-pull output drives 10cm PCB traces without ringing. |
Use Scenario: Detecting temperature threshold crossings from NTC thermistor voltage dividers in battery thermal management. IC Role / Device Role / Timing Role: Precision comparator comparing thermistor output against stable reference voltage. Use Value: ±1mV max VOS ensures < 0.5°C error at 25°C; -5nA input bias prevents loading errors in high-R dividers (>100kΩ). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV393IDR | Higher supply current (20µA/comparator), slower propagation (1.2µs), no rail-to-rail inputs | Suitable for non-battery applications with ample supply margin and relaxed timing | Select when cost is prioritized over power and speed; requires level-shifting for ground-referenced inputs |
| TLV3702IDR | Lower supply current (1.8µA), but higher input offset (±3.5mV), no guaranteed rail-to-rail output into 2mA | Better for ultra-low-power designs where offset tolerance > 2mV is acceptable | Choose when sub-2µA current is critical and output load ≤ 0.5mA; verify output swing at VCC = 2.1V |
Compared with LMV393IDR and TLV3702IDR, the MAX9077EKA+T uniquely balances 3µA supply current, 580ns speed, rail-to-rail I/O, and ±1mV offset - making it the only option meeting all four constraints simultaneously in space-limited portable systems.
Availability
MAX9077EKA+T is available at Aetrix Electronics and suitable for battery-powered systems, IR receivers, and digital line receivers requiring stable component supply, full RoHS compliance, and guaranteed -40°C to +85°C operation.
Supply support for MAX9077EKA+T 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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, medical, and portable applications.
The MAX9075/MAX9077 family was engineered specifically for ultra-low-power, space-constrained sensing and interface tasks - delivering nanowatt-class efficiency without sacrificing speed or accuracy in single-supply environments.
FAQ
What is the maximum operating supply voltage for MAX9077EKA+T?
The absolute maximum supply voltage for MAX9077EKA+T is 6V, but its specified operating range is 2.1V to 5.5V. Operation above 5.5V risks permanent damage, while operation below 2.1V may cause unreliable output behavior. The device is characterized and guaranteed across -40°C to +85°C within this 2.1V–5.5V window, and MAX9077EKA+T maintains 3µA supply current and 580ns propagation delay throughout.
Does MAX9077EKA+T support rail-to-rail input voltage operation?
MAX9077EKA+T supports rail-to-rail *differential* input voltage (e.g., one input at GND, the other at VCC) due to the absence of an internal differential clamp. Its common-mode input range is -0.2V to VCC–1.2V - meaning both inputs must stay within that window relative to GND. This allows ground-sensing capability but does not permit either input to exceed VCC–1.2V or go below -0.2V. MAX9077EKA+T is not a true rail-to-rail common-mode device like some op-amps.
Can MAX9077EKA+T drive a 2mA load while maintaining rail-to-rail output swing?
Yes. MAX9077EKA+T's push-pull output stage is specified to source and sink up to 2mA while maintaining VOL ≤ 0.4V and VOH ≥ VCC–0.4V at VCC = 5V, and performance is guaranteed across 2.1V–5.5V. At VCC = 2.1V, VOL remains ≤ 0.4V with 2mA sink, and VOH stays ≥ 1.7V with 2mA source - enabling direct interfacing with 1.8V/3.3V/5V logic families without external components. This capability is confirmed in the Electrical Characteristics table for MAX9077EKA+T.
Is MAX9077EKA+T pin-compatible with other dual comparators in 8-pin SOT23?
No. MAX9077EKA+T uses a proprietary pinout: Pin 1 = OUTA, Pin 2 = INA−, Pin 3 = INA+, Pin 4 = GND, Pin 5 = VCC, Pin 6 = INB+, Pin 7 = INB−, Pin 8 = OUTB. This differs from industry-standard dual comparators like LM393 or TLV3702, which place GND at Pin 4 and VCC at Pin 8. PCB layout for MAX9077EKA+T must follow its specific pin mapping - no drop-in replacement is possible without board revision.
What is the input offset voltage specification for MAX9077EKA+T over temperature?
MAX9077EKA+T has a maximum input offset voltage of ±8mV over the full -40°C to +85°C operating range, with ±1mV typical at +25°C. The offset drift is characterized in Figure MAX9075 toc12, showing < ±0.5mV variation from +25°C to +85°C at VCC = 5V. This stability supports precision threshold detection in automotive cabin modules and medical sensor front-ends where thermal drift must remain below 1mV across ambient conditions. MAX9077EKA+T's offset performance is guaranteed per the datasheet's Electrical Characteristics table.
MAX9077EKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-8
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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
- :
- SOT-23-8
MAX9077EKA+T FAQ
1.How can I place an order for MAX9077EKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9077EKA+T 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 MAX9077EKA+T reliable?
The price and inventory of MAX9077EKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9077EKA+T is usually 5 days.
3.What payment methods are accepted for MAX9077EKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9077EKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9077EKA+T?
MAX9077EKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9077EKA+T 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 MAX9077EKA+T?
For technical support, including MAX9077EKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9077EKA+T requirements.
6.How does Aetrix verify that MAX9077EKA+T is sourced from the original manufacturer or authorized distributors?
All MAX9077EKA+T 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 MAX9077EKA+T meets industry standards.
7.What is the process for return or replacement of MAX9077EKA+T?
All MAX9077EKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9077EKA+T, 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 MAX9077EKA+T part is unused and in its original packaging.
Return procedure for MAX9077EKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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