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Analog Devices Inc./Maxim Integrated MAX942EPA+
- Part No.:
- MAX942EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX942EPA+.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,490
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Product details
Overview
MAX942EPA+ 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 push-pull outputs. It operates across –40°C to +85°C and is used in battery-powered threshold detection and line receiver circuits.
For engineers reviewing the MAX942EPA+ datasheet, MAX942EPA+ pinout, MAX942EPA+ application, or MAX942EPA+ equivalent, key selection criteria include input common-mode range beyond rails (–0.2V to V+ + 0.2V), low 1mV typical offset voltage, internal hysteresis for noise immunity, and compatibility with 8-pin PDIP packaging for through-hole prototyping and industrial control interfaces.
Technical Context
The MAX942EPA+ implements a bipolar process-based comparator core with rail-to-rail input stage enabling operation with inputs extended 0.2V beyond either supply rail. Its output stage delivers push-pull drive without external pull-ups, sinking or sourcing up to 4mA while maintaining VOH ≥ V+ – 0.4V and VOL ≤ 0.4V.
Internal hysteresis eliminates need for external feedback networks, providing clean switching on slow-moving signals. Propagation delay skew between channels is limited to 10ns, and differential propagation delay is guaranteed ≤10ns - critical for matched timing in dual-channel sampling and zero-crossing detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - supports direct interface with 3.3V and 5V logic domains without level shifting. |
| Propagation Delay | 80ns (typ) at 5mV overdrive - enables sub-12.5MHz signal discrimination in real-time monitoring. |
| Input Offset Voltage | 1mV (typ), 3mV (max) over temperature - ensures accurate threshold detection in precision sensor interfaces. |
| Rail-to-Rail Input Range | –0.2V to V+ + 0.2V - allows direct connection to transducers or DACs operating near supply rails. |
| Supply Current per Comparator | 350μA (typ) at 3V - enables dual-channel high-speed comparison in power-constrained portable systems. |
| Output Voltage Swing | VOH ≥ V+ – 0.4V, VOL ≤ 0.4V - guarantees reliable logic-level interfacing with both CMOS and TTL loads. |
| Common-Mode Rejection | 80μV/V (min) - maintains accuracy under varying ground or supply noise in mixed-signal PCB layouts. |
Pinout & Package
MAX942EPA+ is housed in an 8-pin plastic DIP (PDIP) package with 0.3-inch body width, compatible with standard through-hole sockets and wave-solder processes. Pin 1 is top-left corner when notch faces upward.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply input (2.7V–5.5V); must be decoupled locally with 0.1μF ceramic capacitor. |
| 2 | OUTB | Comparator B output - push-pull, no external pull-up required; drives CMOS/TTL directly. |
| 3 | INB– | Inverting input for comparator B - accepts voltages from –0.2V to V+ + 0.2V. |
| 4 | INB+ | Noninverting input for comparator B - same rail-to-rail common-mode range as INB–. |
| 5 | GND | Analog/digital ground reference - requires low-inductance connection to system ground plane. |
| 6 | INA+ | Noninverting input for comparator A - electrically identical to INB+; supports independent channel use. |
| 7 | INA– | Inverting input for comparator A - fully interchangeable with INB– in layout routing. |
| 8 | OUTA | Comparator A output - functionally identical to OUTB; enables dual independent comparisons. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Enables direct sensing of signals at GND or V+ without attenuation or clamping diodes. |
| Internal hysteresis | Eliminates external resistor network and associated design calculations for noise-immune switching. |
| 80ns propagation delay | Supports real-time response in 12-bit ADC sampling clocks and motor commutation timing circuits. |
| 350μA per comparator supply current | Reduces total quiescent power to <2.8mW at 3.3V - suitable for always-on battery-backed comparators. |
| CMOS/TTL-compatible outputs | Drives 10 LSTTL loads or 20 CMOS gates directly - removes need for buffer ICs in digital interface paths. |
Applications
| Threshold Detector | Line Receiver |
|---|---|
|
Use Scenario: Monitoring analog sensor output (e.g., thermistor or photodiode amplifier) against programmable reference voltage to trigger alarm or control action. IC Role / Device Role / Timing Role: Dual comparator performing simultaneous high/low window detection with independent thresholds. Use Value: Internal hysteresis prevents chatter during slow thermal drift; rail-to-rail inputs accept full-scale sensor swing without signal conditioning. |
Use Scenario: Converting noisy, attenuated differential signals from long cables (e.g., RS-422, industrial fieldbus) into clean digital logic levels. IC Role / Device Role / Timing Role: High-speed comparator acting as differential line receiver with fast edge acquisition and noise margin. Use Value: 80ns delay enables >10Mbps data recovery; input common-mode range accommodates cable-induced DC offsets up to ±0.2V. |
| Zero-Crossing Detector | Sampling Circuit Trigger |
|
Use Scenario: Detecting AC waveform polarity transitions in power inverters, motor controllers, or energy metering systems. IC Role / Device Role / Timing Role: Precision comparator comparing sinusoidal input to ground reference to generate synchronous digital edges. Use Value: 1mV offset ensures crossing point accuracy within ±0.03° at 50Hz; rail-to-rail inputs tolerate transformer-coupled signals centered at 0V. |
Use Scenario: Generating precise sample-enable pulses synchronized to analog signal peaks or zero crossings in data acquisition systems. IC Role / Device Role / Timing Role: Dual comparator configured as window comparator or slope detector to initiate ADC conversion timing. Use Value: Matched propagation delay (<10ns skew) between channels ensures consistent timing across dual-sampling paths. |
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). | Suitable only for low-frequency, non-rail-sensing applications like basic voltage monitoring. | Select MAX942EPA+ when speed, rail-to-rail input, or low-power operation is required. |
| TLV3502CDR | Faster (4.5ns delay), lower offset (0.75mV typ), but requires minimum 2.7V supply and lacks extended common-mode range beyond rails. | Better for ultra-high-speed timing but incompatible with inputs driven below GND or above V+. | Choose MAX942EPA+ for robustness in mixed-voltage systems where inputs exceed supply rails. |
Compared with LM393DR and TLV3502CDR, the MAX942EPA+ uniquely balances nanosecond-speed response, true rail-to-rail input tolerance, and microamp-level quiescent current - making it optimal for battery-powered instrumentation requiring precision timing and wide dynamic input range.
Availability
MAX942EPA+ is available at Aetrix Electronics and suitable for battery-powered systems, industrial threshold detectors, and line receiver circuits requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for MAX942EPA+ 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 and mixed-signal ICs for industrial, medical, and communications applications, with emphasis on low-power, high-reliability performance.
The MAX941/MAX942/MAX944 family was engineered specifically for high-speed, low-power, single-supply comparator applications in portable and embedded systems where rail-to-rail input capability and minimal propagation delay are critical.
FAQ
What is the operating temperature range for MAX942EPA+?
The MAX942EPA+ is rated for operation from –40°C to +85°C, validated across this full industrial temperature range per its ordering code "E". This makes MAX942EPA+ suitable for deployment in outdoor equipment, automotive cabin modules, and factory automation hardware where ambient conditions vary widely.
Does MAX942EPA+ require external pull-up resistors on its outputs?
No, MAX942EPA+ features push-pull CMOS/TTL-compatible outputs that actively drive high or low without external pull-up components. Each output can source up to 400μA while maintaining VOH ≥ V+ – 0.4V and sink up to 4mA while holding VOL ≤ 0.4V - simplifying board layout and reducing BOM count.
Can MAX942EPA+ accept input voltages outside the supply rails?
Yes, MAX942EPA+ supports a common-mode input range from –0.2V to V+ + 0.2V, meaning both inputs may be driven slightly below GND or above V+ without damage or false output inversion. This capability is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables for MAX942EPA+.
What is the typical propagation delay of MAX942EPA+ and under what conditions?
The typical propagation delay of MAX942EPA+ is 80ns, measured with 5mV input overdrive, 15pF capacitive load, and 10Ω source impedance at TA = +25°C. This value holds across the full –40°C to +85°C range, with maximum delay specified at 200ns under worst-case conditions.
Is MAX942EPA+ pin-compatible with other devices in the MAX94x family?
MAX942EPA+ shares the same 8-pin PDIP pinout with MAX941EPA+, MAX942CPA, and MAX942ESA, enabling drop-in substitution in existing layouts where dual-comparator functionality is required. However, MAX941 variants include SHDN and LATCH pins not present in MAX942EPA+, so those control functions are unavailable.
MAX942EPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- CMOS, Push-Pull, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 2mV @ 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:
- Through Hole
- :
- 8-PDIP
MAX942EPA+ FAQ
1.How can I place an order for MAX942EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX942EPA+ 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 MAX942EPA+ reliable?
The price and inventory of MAX942EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX942EPA+ is usually 5 days.
3.What payment methods are accepted for MAX942EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX942EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX942EPA+?
MAX942EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX942EPA+ 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 MAX942EPA+?
For technical support, including MAX942EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX942EPA+ requirements.
6.How does Aetrix verify that MAX942EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX942EPA+ 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 MAX942EPA+ meets industry standards.
7.What is the process for return or replacement of MAX942EPA+?
All MAX942EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX942EPA+, 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 MAX942EPA+ part is unused and in its original packaging.
Return procedure for MAX942EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX942EPA+ 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 USA Inc.
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