My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX942ESA-T
- Part No.:
- MAX942ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX942ESA-T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,231
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX942ESA-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 push-pull outputs. It operates from 2.7V to 5.5V and is widely used in battery-powered threshold detection and zero-crossing circuits.
For engineers reviewing the MAX942ESA-T datasheet, MAX942ESA-T pinout, MAX942ESA-T application, or MAX942ESA-T equivalent, key selection considerations include input common-mode range extending beyond rails, internal hysteresis for noise immunity, output swing within 0.4V of V+ and GND, and SO-8 packaging for industrial-grade temperature operation (-40°C to +85°C).
Technical Context
The MAX942ESA-T implements a bipolar process-based comparator core with internal hysteresis (1mV typical input-referred width), enabling clean switching without external feedback. Its rail-to-rail input stage accepts voltages from -0.2V to (V+ + 0.2V), and its current-driven output stage delivers VOH ≥ V+ − 0.4V and VOL ≤ 0.4V at 400μA load.
Designed 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 suitable for synchronous dual-comparator applications like window detectors and differential line receivers.
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 typical at 5mV overdrive - enables reliable sampling up to ~10MHz edge rates |
| Input Offset Voltage | 1mV max (TYP 2mV) - ensures accurate threshold detection with sub-millivolt resolution |
| Supply Current per Comparator | 350μA typical at 3V - enables ultra-low-power operation in always-on sensor interfaces |
| Input Common-Mode Range | -0.2V to (V+ + 0.2V) - allows input signals to exceed supply rails, simplifying sensor interfacing |
| Output Voltage Swing | VOL ≤ 0.4V / VOH ≥ V+ − 0.4V at 400μA - directly drives CMOS/TTL without pull-up resistors |
| Operating Temperature | -40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
MAX942ESA-T is housed in an 8-pin SO (Small Outline) package with standard 1.27mm pitch, JEDEC MS-012AC compliant footprint, and RoHS-compliant matte tin lead finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-drain compatible push-pull output - sinks or sources current without external pull-up |
| 2 | INA− | Inverting input of Comparator A - accepts rail-to-rail common-mode voltage including below GND and above V+ |
| 3 | INA+ | Noninverting input of Comparator A - matched offset and bias current to INA− for precision differential sensing |
| 4 | V+ | Positive supply pin - must be decoupled with 0.1μF ceramic capacitor placed adjacent to pin |
| 5 | INB+ | Noninverting input of Comparator B - electrically isolated from INA±; enables independent dual-channel operation |
| 6 | INB− | Inverting input of Comparator B - shares same input stage architecture and specifications as INA± |
| 7 | OUTB | Comparator B push-pull output - independently controlled; no cross-talk with OUTA under normal operation |
| 8 | GND | Analog ground reference - requires low-inductance connection to PCB ground plane for stable high-speed performance |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input voltage range | Extends −0.2V below GND and +0.2V above V+, eliminating need for input clamping or level-shifting circuitry |
| Internal hysteresis | 1mV typical input-referred hysteresis width prevents oscillation on slow or noisy input transitions |
| CMOS/TTL-compatible outputs | Push-pull structure delivers full rail-swing logic levels without external pull-ups, reducing BOM count and board area |
| Low 350μA supply current per comparator | Enables continuous operation in energy-constrained applications such as portable medical sensors and IoT endpoints |
| 80ns propagation delay (5mV overdrive) | Supports real-time response in high-speed data acquisition, motor commutation timing, and pulse-width monitoring |
Applications
| Threshold Detector | Zero-Crossing Detector |
|---|---|
Use Scenario: Monitoring analog sensor output (e.g., thermistor, photodiode) against programmable reference voltage to trigger digital alerts. IC Role / Device Role / Timing Role: Dual comparator performing simultaneous high/low threshold comparison for hysteresis-based state machine control. Use Value: Internal hysteresis eliminates external resistor networks; rail-to-rail inputs accept unconditioned sensor signals directly. |
Use Scenario: Detecting polarity reversal of AC waveform (e.g., mains voltage, audio signal) for synchronization or protection logic. IC Role / Device Role / Timing Role: Comparator configured with grounded inverting input to identify precise 0V crossing points in real time. Use Value: 80ns delay ensures sub-microsecond timing accuracy; output swing within 0.4V of rails guarantees clean logic-level transitions. |
| Battery Voltage Monitor | Differential Line Receiver |
Use Scenario: Supervising Li-ion battery pack voltage during charge/discharge cycles to initiate cutoff or warning signals. IC Role / Device Role / Timing Role: One comparator compares battery voltage against upper threshold (overvoltage), second against lower threshold (undervoltage). Use Value: 2.7V minimum supply enables operation down to near-dead battery states; low quiescent current extends monitoring runtime. |
Use Scenario: Receiving differential signals from RS-422/RS-485 transceivers or isolated current-loop interfaces in industrial PLCs. IC Role / Device Role / Timing Role: Dual comparator reconstructing logic states from differential pair (e.g., IN+ vs IN−) with noise rejection via common-mode rejection. Use Value: 300μV/V CMRR minimizes false triggering from EMI; matched propagation delay (<10ns skew) preserves signal integrity across both channels. |
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, no internal hysteresis | Suitable only for low-speed, cost-sensitive DC threshold detection where speed and input range are not critical | Select when budget constraints outweigh performance requirements and system supply >5V |
| TLV3502IDR | Faster (4.5ns delay), rail-to-rail I/O, lower supply current (120μA), but limited common-mode range (to V+ − 0.1V) and narrower temp range (−40°C to +125°C) | Better for ultra-high-speed sampling but unsuitable for inputs exceeding V+ or below GND | Select when nanosecond response is mandatory and input signals remain strictly within supply rails |
Compared with LM393DR and TLV3502IDR, the MAX942ESA-T uniquely balances 80ns speed, true rail-to-rail input capability, internal hysteresis, and industrial temperature support - making it optimal for robust, medium-speed analog-digital interfacing where signal integrity and supply flexibility are essential.
Availability
MAX942ESA-T is available at Aetrix Electronics and suitable for battery-powered systems, threshold detectors/discriminators, and zero-crossing detectors requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX942ESA-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 computing applications.
The MAX94x family was designed specifically for low-voltage, high-speed comparator applications in portable and battery-operated equipment, emphasizing rail-to-rail operation, low power, and integrated hysteresis to simplify system design.
FAQ
What is the operating temperature range of the MAX942ESA-T?
The MAX942ESA-T is rated for operation from −40°C to +85°C, meeting industrial-grade environmental requirements. This range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the datasheet, and applies specifically to the ESA suffix variant in SO-8 packaging.
Does the MAX942ESA-T include shutdown or latch functionality?
No, the MAX942ESA-T does not include shutdown or latch features. These functions are exclusive to the MAX941 variant (e.g., MAX941ESA). The MAX942ESA-T is a dual comparator only, with pins 4 (V+), 8 (GND), and outputs 1 (OUTA) and 7 (OUTB) dedicated solely to comparison operation.
Can the MAX942ESA-T accept input voltages outside the supply rails?
Yes, the MAX942ESA-T supports an input common-mode voltage range of −0.2V to (V+ + 0.2V), allowing inputs to safely extend 0.2V beyond both GND and V+. This is explicitly specified in the Electrical Characteristics table and enables direct interfacing with sensors or signals that swing outside the supply domain.
What is the typical propagation delay of the MAX942ESA-T and under what conditions is it measured?
The typical propagation delay of the MAX942ESA-T is 80ns, measured with 5mV input overdrive, V+ = 3V or 5V, CLOAD = 15pF, and RS = 10Ω. This value is guaranteed across temperature for the MAX94_E grade and appears in the Electrical Characteristics table under "Propagation Delay tPD+, tPD−".
Is the MAX942ESA-T pin-compatible with other packages of the same part number?
The MAX942ESA-T (SO-8) shares identical pinout with the MAX942EPA (PDIP-8) and MAX942EUA-T (μMAX-8), as confirmed by the Pin Configurations diagram and Pin Description table. All three variants use the same 1–8 pin numbering and function mapping, enabling drop-in replacement across package types.
MAX942ESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- :
- 8-SOIC
MAX942ESA-T FAQ
1.How can I place an order for MAX942ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX942ESA-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 MAX942ESA-T reliable?
The price and inventory of MAX942ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX942ESA-T is usually 5 days.
3.What payment methods are accepted for MAX942ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX942ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX942ESA-T?
MAX942ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX942ESA-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 MAX942ESA-T?
For technical support, including MAX942ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX942ESA-T requirements.
6.How does Aetrix verify that MAX942ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX942ESA-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 MAX942ESA-T meets industry standards.
7.What is the process for return or replacement of MAX942ESA-T?
All MAX942ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX942ESA-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 MAX942ESA-T part is unused and in its original packaging.
Return procedure for MAX942ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX942ESA-T 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.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
