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Analog Devices Inc./Maxim Integrated MAX942EUA+
- Part No.:
- MAX942EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX942EUA+.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:724
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Product details
Overview
MAX942EUA+ from Maxim Integrated is a dual high-speed comparator optimized for 3V/5V single-supply systems, featuring rail-to-rail inputs, 80ns propagation delay (5mV overdrive), 350μA per comparator supply current, and CMOS/TTL-compatible outputs. It operates from 2.7V to 5.5V and is used in battery-powered threshold detection and line receiver circuits.
For engineers reviewing the MAX942EUA+ datasheet, MAX942EUA+ pinout, MAX942EUA+ application, or MAX942EUA+ equivalent, key selection considerations include input common-mode range extending beyond rails, internal hysteresis for noise immunity, output swing within 0.4V of supply rails, and μMAX-8 package compatibility with space-constrained portable designs.
Technical Context
The MAX942EUA+ implements a bipolar process-based comparator core with internal hysteresis (1mV typical input-referred width), enabling clean switching on slow-moving or noisy signals without external components. Its rail-to-rail input stage accepts voltages from –0.2V to V+ + 0.2V, and its current-driven output stage delivers VOH = V+ – 0.2V (at 400μA) and VOL = 0.2V (at 400μA).
As a dual-channel device, it guarantees matched propagation delay skew ≤10ns between channels and differential propagation delay ≤10ns, supporting precise timing-critical applications like zero-crossing detection and sampling circuits where channel-to-channel consistency is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 80ns typical at 5mV overdrive - enables sub-12.5MHz signal edge detection in real-time control loops. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct operation from Li-ion batteries (3.0–4.2V) and standard 3.3V/5V rails. |
| Input Offset Voltage | 1mV max (TYP 1mV) at +25°C - ensures accurate threshold discrimination down to millivolt-level signals. |
| Supply Current per Comparator | 350μA typical at 3V - allows dual-channel operation under 700μA total, critical for multi-year battery life. |
| Input Common-Mode Range | –0.2V to V+ + 0.2V - permits interface with sensors or signals exceeding supply rails, e.g., ±100mV transducer outputs. |
| Output Voltage Swing | VOL = 0.2V / VOH = V+ – 0.2V at 400μA - directly drives 3.3V CMOS logic without level-shifting or pull-ups. |
| Internal Hysteresis | 1mV typical input-referred - eliminates external resistor networks and prevents chatter on slowly varying inputs. |
Pinout & Package
MAX942EUA+ is housed in an 8-pin μMAX® package (U8-1 outline, 3mm × 3mm, 0.5mm pitch), specified for –40°C to +85°C operation. The package features exposed pad for thermal enhancement and is RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Dual comparator Channel A open-drain-like output; sinks or sources current to rail - compatible with CMOS/TTL loads without external pull-up. |
| 2 | INA− | Inverting input for Channel A - accepts common-mode voltages beyond rails; protected by internal diode clamp network. |
| 3 | INA+ | Noninverting input for Channel A - same rail-to-rail voltage tolerance and ESD protection as INA−. |
| 4 | V+ | Positive supply pin - must not exceed +6.5V; requires local 0.1μF ceramic decoupling placed adjacent to pin. |
| 5 | INB+ | Noninverting input for Channel B - electrically identical to INA+; enables independent dual-threshold sensing. |
| 6 | INB− | Inverting input for Channel B - matches INA− performance; supports differential or single-ended configurations per channel. |
| 7 | OUTB | Channel B output - fully independent of OUTA; supports simultaneous dual comparisons with ≤10ns inter-channel skew. |
| 8 | GND | Analog ground reference - must connect to low-impedance PCB ground plane; shared with all internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Accepts –0.2V to V+ + 0.2V common-mode voltage - enables direct connection to overvoltage-capable sensors and legacy analog interfaces. |
| 80ns propagation delay | Guaranteed at 5mV overdrive - supports >10MHz edge-rate detection in sampling circuits and high-frequency line receivers. |
| 350μA per comparator supply current | Total 700μA for dual operation at 3V - reduces power budget impact in always-on battery monitoring and wake-up comparators. |
| Internal 1mV hysteresis | Eliminates need for external feedback resistors - simplifies PCB layout and removes sensitivity to trace parasitics in noise-prone environments. |
| CMOS/TTL-compatible outputs | VOH/VOL swing within 0.4V of rails at 4mA load - ensures reliable logic-level interfacing across 3.3V and 5V domains without translation. |
| Short-circuit tolerant I/O | All pins withstand continuous fault to V+ or GND - enhances system robustness in industrial sensor nodes and motor-control feedback paths. |
Applications
| Battery Voltage Monitor | Motor Phase Detection |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles to trigger low-battery alerts or cutoff. IC Role / Device Role / Timing Role: Dual comparator performs simultaneous high-threshold (4.2V) and low-threshold (3.0V) detection using resistor-divider references. Use Value: 1mV offset and rail-to-rail inputs ensure ±10mV accuracy across full 2.7–5.5V supply range, extending usable battery capacity. |
Use Scenario: Detecting zero-crossing points of back-EMF in brushless DC motor windings for commutation timing. IC Role / Device Role / Timing Role: Each comparator channel monitors one winding pair; fast 80ns response captures precise crossing instants. Use Value: ≤10ns channel-to-channel skew ensures synchronous phase alignment across all three motor phases. |
| USB-C Cable Orientation Sensing | Industrial Analog Threshold Alarm |
|
Use Scenario: Interpreting CC1/CC2 pin voltages in USB-C receptacles to determine plug orientation and source/sink role. IC Role / Device Role / Timing Role: Dual comparator compares CC pin voltages against 0.2V and 2.0V thresholds to decode Type-C configuration channel states. Use Value: 350μA per channel enables always-on detection with <1mW total dissipation, meeting USB-C power budget constraints. |
Use Scenario: Triggering safety shutdown when temperature sensor output exceeds preset limits in PLC analog input modules. IC Role / Device Role / Timing Role: One comparator channel monitors sensor voltage; second channel validates reference stability via ratiometric check. Use Value: Input common-mode range extending beyond rails accommodates sensor offsets and long cable-induced ground shifts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Slower (1.3μs propagation delay), higher supply current (500μA/channel), no rail-to-rail inputs (common-mode limited to V+ – 1.5V). | Suitable only for low-speed, non-rail-to-rail applications such as basic power-good detection. | Select LM393DR only if cost is primary constraint and speed/rail-to-rail capability is unnecessary. |
| TLV3502IDR | Faster (4.5ns delay), lower supply current (25μA/channel), but requires dual supply (±2.5V) or level-shifted inputs for single-supply use. | Requires additional biasing circuitry for 3V/5V single-supply systems, increasing BOM count and layout complexity. | Choose TLV3502IDR only when nanosecond timing is mandatory and dual-supply infrastructure exists. |
Compared with LM393DR and TLV3502IDR, the MAX942EUA+ uniquely balances 80ns speed, 350μA efficiency, rail-to-rail inputs, and true single-supply operation - making it optimal for compact, battery-aware systems requiring precision thresholding without design overhead.
Availability
MAX942EUA+ is available at Aetrix Electronics and suitable for battery-powered systems, industrial threshold detectors, and USB-C interface circuits requiring stable component supply across extended temperature ranges.
Supply support for MAX942EUA+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX94x family was designed specifically for low-voltage, high-speed comparator applications in portable and energy-sensitive systems - emphasizing rail-to-rail operation, micropower consumption, and robust input/output tolerance.
FAQ
What is the operating temperature range for MAX942EUA+?
The MAX942EUA+ is rated for –40°C to +85°C ambient operation, validated across this full range for parameters including propagation delay, input offset voltage, and supply current. This makes MAX942EUA+ suitable for automotive cabin modules, industrial sensors, and outdoor portable equipment where thermal extremes occur.
Does MAX942EUA+ require external pull-up resistors on its outputs?
No, MAX942EUA+ does not require external pull-up resistors. Its outputs actively drive to within 0.2V of V+ and 0.2V of GND at 400μA load, ensuring full CMOS/TTL logic compatibility. This eliminates BOM items and layout area typically needed for open-collector comparators, simplifying design for MAX942EUA+ integration.
Can MAX942EUA+ operate from a 2.7V supply?
Yes, MAX942EUA+ is fully specified to operate from 2.7V to 5.5V. At 2.7V, propagation delay remains ≤200ns (typical 80ns), supply current is ~350μA per comparator, and input common-mode range extends from –0.2V to +2.9V - enabling reliable use in single-cell Li-ion and coin-cell powered devices where MAX942EUA+ delivers consistent performance.
How does the internal hysteresis of MAX942EUA+ improve system reliability?
The internal 1mV typical hysteresis in MAX942EUA+ prevents output oscillation on slow-moving or noisy inputs by creating distinct upper and lower trip points. This eliminates false triggering in applications like zero-crossing detection or line receivers, removing the need for external hysteresis resistors and associated layout sensitivity - a key reliability advantage of MAX942EUA+ over basic comparators.
Is MAX942EUA+ pin-compatible with other packages of the MAX942 family?
Yes, MAX942EUA+ shares identical pinout with MAX942ESA (SO-8) and MAX942EPA (PDIP-8). All three variants use the same 1–8 pin numbering: OUTA, INA−, INA+, V+, INB+, INB−, OUTB, GND. This allows drop-in replacement across μMAX, SO, and PDIP packages during prototyping or volume production without PCB redesign for MAX942EUA+ integration.
MAX942EUA+ 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:
- CMOS, Push-Pull, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 3mV @ 5.5V
- Voltage - Input Offset (Max):
- 0.15µA @ 5.5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 600µA
- Current - Quiescent (Max):
- 81.94dB CMRR, 81.94dB PSRR
- CMRR, PSRR (Typ):
- 80ns
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-uMAX/uSOP
MAX942EUA+ FAQ
1.How can I place an order for MAX942EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX942EUA+ 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 MAX942EUA+ reliable?
The price and inventory of MAX942EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX942EUA+ is usually 5 days.
3.What payment methods are accepted for MAX942EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX942EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX942EUA+?
MAX942EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX942EUA+ 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 MAX942EUA+?
For technical support, including MAX942EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX942EUA+ requirements.
6.How does Aetrix verify that MAX942EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX942EUA+ 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 MAX942EUA+ meets industry standards.
7.What is the process for return or replacement of MAX942EUA+?
All MAX942EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX942EUA+, 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 MAX942EUA+ part is unused and in its original packaging.
Return procedure for MAX942EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX942EUA+ Tags
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