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Analog Devices Inc./Maxim Integrated MAX942EUA+T
- Part No.:
- MAX942EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX942EUA+T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:5,655
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Product details
Overview
The MAX942EUA+T 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+T datasheet, MAX942EUA+T pinout, MAX942EUA+T application, or MAX942EUA+T equivalent, key selection criteria include input common-mode range beyond rails, internal hysteresis for noise immunity, output swing within 0.4V of supply rails, and μMAX package suitability for space-constrained portable designs.
Technical Context
The MAX942EUA+T 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. It lacks latch or shutdown functions-features exclusive to the MAX941-making it strictly a high-fidelity, low-power comparison engine for timing-critical analog-to-digital interface stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - supports direct integration into 3V and 5V logic domains without level-shifting. |
| Propagation Delay | 80ns (typical, 5mV overdrive) - enables sub-12.5MHz signal edge detection in real-time control loops. |
| Input Offset Voltage | 1mV (typ, TA = +25°C); 5.5mV (max, –40°C to +85°C) - ensures accurate threshold discrimination down to millivolt-level signals. |
| Rail-to-Rail Input Range | –0.2V to V+ + 0.2V - allows direct sensing of signals below GND or above V+, e.g., sensor offsets or AC-coupled waveforms. |
| Output Swing | VOL = 0.2V / VOH = V+ – 0.2V (at 400μA) - guarantees reliable interfacing with 3.3V CMOS and 5V TTL logic families. |
| Supply Current | 350μA per comparator (typ, V+ = 3V) - enables ultra-low-power operation in always-on battery monitoring circuits. |
| Input Bias Current | 150–400nA (–40°C to +85°C) - minimizes loading error on high-impedance sensor sources like thermistors or photodiodes. |
Pinout & Package
The MAX942EUA+T is housed in an 8-pin μMAX® package (outline 21-0036), measuring 3.0mm × 3.0mm × 0.8mm with exposed pad for thermal enhancement. This compact leaded package supports fine-pitch PCB assembly and offers superior thermal performance vs. SO-8 in space-constrained applications.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-drain-like output; sinks or sources current to swing within 0.4V of either rail without pull-up. |
| 2 | INA− | Inverting input of Comparator A; accepts common-mode voltage beyond rails (–0.2V to V+ + 0.2V). |
| 3 | INA+ | Noninverting input of Comparator A; identical rail-to-rail voltage range and fault-tolerant design as INA−. |
| 4 | V+ | Positive supply pin; absolute max rating +6.5V; must be decoupled with 0.1μF ceramic capacitor placed adjacent to pin. |
| 5 | INB+ | Noninverting input of Comparator B; electrically matched to INA+ for dual-channel synchronous comparison. |
| 6 | INB− | Inverting input of Comparator B; shares same input protection diodes and bias current specs as INA−. |
| 7 | OUTB | Comparator B output; independent of OUTA; no crosstalk guaranteed (propagation skew ≤10ns). |
| 8 | GND | Analog ground reference; requires low-inductance connection to solid ground plane for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Accepts inputs from –0.2V to V+ + 0.2V - eliminates need for external level-shifting circuitry in mixed-voltage systems. |
| Internal hysteresis | 1mV typical input-referred hysteresis - prevents oscillation on slow edges or noisy thresholds without external resistors. |
| CMOS/TTL-compatible outputs | VOH ≥ V+ – 0.2V and VOL ≤ 0.2V at 400μA - directly drives standard logic families without interface buffers. |
| Low quiescent current | 350μA per comparator at 3V - extends battery life in portable instrumentation and wearable sensors. |
| Robust input fault tolerance | Withstands continuous short-circuit to either rail on all inputs - simplifies system-level ESD and fault protection design. |
Applications
| Battery-Powered Threshold Detection | High-Speed Line Receiver |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charging/discharging to trigger cutoff or alert at precise 3.0V and 4.2V thresholds. IC Role / Device Role: Dual comparator performing simultaneous under-voltage lockout (UVLO) and over-voltage protection (OVP) with independent hysteresis. Use Value: 1mV offset and rail-to-rail inputs enable ±5mV accuracy across full battery voltage range (2.7V–4.3V), reducing false trips. |
Use Scenario: Receiving differential RS-422/RS-485 signals in industrial PLC backplanes where signal integrity degrades over long traces. IC Role / Device Role: Single-ended conversion of differential line signals using one comparator channel as receiver, second as reference window detector. Use Value: 80ns propagation delay and <10ns inter-channel skew preserve timing margins in multi-drop bus arbitration protocols. |
| Zero-Crossing Detector | Sampling Circuit Trigger |
|
Use Scenario: Detecting AC mains zero-crossing points for TRIAC phase-angle control in smart lighting dimmers. IC Role / Device Role: Comparator comparing AC waveform against GND reference, with internal hysteresis suppressing noise-induced false crossings. Use Value: Input common-mode range extending 0.2V below GND accommodates negative half-cycle without clamping diodes or bias networks. |
Use Scenario: Generating precise sample-enable pulses synchronized to analog signal peaks in data acquisition front-ends. IC Role / Device Role: One comparator detects peak amplitude via fast-slewing hold circuit; second validates timing window validity before ADC conversion. Use Value: Matched propagation delays (<10ns skew) ensure deterministic timing relationship between peak detect and sample strobe generation. |
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), no rail-to-rail inputs (CM range = 0V to V+ − 1.5V). | Not suitable for sub-100ns timing-critical detection or signals near supply rails; acceptable only in cost-sensitive, non-speed-critical DC thresholding. | Select MAX942EUA+T when speed, rail-to-rail input, or low power are required; LM393DR only if budget dominates and performance margin is ample. |
| TLV3502IDR | Faster (4.5ns delay), lower offset (0.5mV typ), but requires external hysteresis and has narrower input CM range (0.2V to V+ − 0.2V). | Demands careful layout and resistor network design for noise immunity; unsuitable for signals below GND or above V+ without external level shift. | Choose TLV3502IDR only for ultra-high-speed applications where external hysteresis design effort is justified; MAX942EUA+T provides integrated robustness out-of-box. |
Compared with LM393DR and TLV3502IDR, the MAX942EUA+T uniquely balances 80ns speed, rail-to-rail input capability, built-in hysteresis, and 350μA quiescent current - making it the optimal choice for portable, precision, and noise-prone analog interface tasks where design simplicity and reliability are prioritized.
Availability
The MAX942EUA+T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors/discriminators, and line receivers requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for MAX942EUA+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX942EUA+T belongs to Maxim's high-speed comparator product line, engineered specifically for low-voltage, low-power, rail-to-rail operation in portable and energy-conscious systems where precision timing and robust input handling are essential.
FAQ
What is the operating temperature range of the MAX942EUA+T?
The MAX942EUA+T is rated for operation from –40°C to +85°C, as confirmed by its "E" grade designation in the ordering information table. This extended industrial temperature range ensures reliable performance in automotive cabin modules, outdoor IoT sensors, and industrial control cabinets where ambient conditions vary widely. The μMAX package maintains thermal stability across this full range due to its exposed pad construction.
Does the MAX942EUA+T include shutdown or latch functionality?
No, the MAX942EUA+T does not include shutdown or latch functionality. These features are exclusive to the MAX941 family, as explicitly stated in the datasheet's Features and Pin Description sections. The MAX942EUA+T is a dual comparator only - its eight pins are dedicated solely to two independent comparator channels, power, ground, and inputs. Any requirement for power gating or result storage necessitates external circuitry or selection of the MAX941 variant.
Can the MAX942EUA+T interface directly with 3.3V CMOS logic?
Yes, the MAX942EUA+T interfaces directly with 3.3V CMOS logic. Its output stage delivers VOH ≥ V+ – 0.2V and VOL ≤ 0.2V at 400μA sink/source current. When powered from V+ = 3.3V, this yields VOH ≥ 3.1V and VOL ≤ 0.2V - well within the VIH(min) = 2.0V and VIL(max) = 0.8V requirements of standard 3.3V CMOS. No level-shifter or pull-up resistor is needed.
What is the maximum supply voltage the MAX942EUA+T can tolerate?
The MAX942EUA+T has an absolute maximum supply voltage rating of +6.5V between V+ and GND, as specified in the Absolute Maximum Ratings table. However, its functional operating range is limited to 2.7V to 5.5V per the Electrical Characteristics. Operating continuously at 6.5V risks permanent damage and is outside guaranteed specifications; sustained use should remain within the 5.5V upper limit for reliable parametric performance.
Is the MAX942EUA+T pin-compatible with other packages of the MAX942 family?
Yes, the MAX942EUA+T shares identical pinout and function mapping with the SO-8 (MAX942ESA) and PDIP-8 (MAX942EPA) variants of the MAX942 family, as confirmed by the unified "MAX942" pin configuration diagram. All three packages assign OUTA, INA−, INA+, V+, INB+, INB−, OUTB, and GND to pins 1 through 8 respectively. This allows drop-in replacement across packages when board layout permits mechanical fit.
MAX942EUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX942EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX942EUA+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 MAX942EUA+T reliable?
The price and inventory of MAX942EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX942EUA+T is usually 5 days.
3.What payment methods are accepted for MAX942EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX942EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX942EUA+T?
MAX942EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX942EUA+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 MAX942EUA+T?
For technical support, including MAX942EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX942EUA+T requirements.
6.How does Aetrix verify that MAX942EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX942EUA+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 MAX942EUA+T meets industry standards.
7.What is the process for return or replacement of MAX942EUA+T?
All MAX942EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX942EUA+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 MAX942EUA+T part is unused and in its original packaging.
Return procedure for MAX942EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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