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Analog Devices Inc./Maxim Integrated MAX9142EKA-T
- Part No.:
- MAX9142EKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-8
- Datasheet:
-
MAX9142EKA-T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,207
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Product details
Overview
MAX9142EKA-T from Analog Devices is a dual high-speed rail-to-rail input comparator optimized for 3V/5V single-supply systems, delivering 40ns propagation delay, 150μA per comparator supply current, and ±0.2V beyond-rail input common-mode range - used in line receivers and threshold detectors where fast, low-power signal decision-making is required.
For engineers reviewing the MAX9142EKA-T datasheet, MAX9142EKA-T pinout, MAX9142EKA-T application, or MAX9142EKA-T equivalent, this page provides verified technical context, package mapping to 8-pin SOT23, real-world design meaning of hysteresis, output swing, and supply rejection, plus two confirmed alternative comparators with documented functional and application differences.
Technical Context
The MAX9142EKA-T integrates two independent high-speed comparators with internal 1.5mV hysteresis, rail-to-rail inputs extending −0.2V to VCC + 0.2V, and CMOS/TTL-compatible push-pull outputs that swing within 300mV of either supply rail. It operates across 2.7V–5.5V supply range and supports continuous short-circuit tolerance on all I/O pins.
No latch or shutdown functionality is present - unlike MAX9141, the MAX9142EKA-T lacks LE and SHDN pins and is strictly a dual comparator with fixed operation. Propagation delay skew between channels is ≤2ns, and differential propagation delay is ≤2ns, enabling precise timing-critical dual-channel comparisons.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 40ns at 10mV overdrive - enables reliable sampling of ≥20MHz signals in zero-crossing or clock-recovery circuits. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct integration into both 3.3V industrial logic and legacy 5V systems without level-shifting. |
| Input Offset Voltage | 0.5mV (typ), 4.5mV (max) over −40°C to +85°C - ensures stable threshold detection under temperature variation. |
| Input Common-Mode Range | −0.2V to VCC + 0.2V - allows direct interface with sensors or DACs operating beyond supply rails (e.g., ±100mV headroom). |
| Output Voltage Swing | VOL = 0.3V / VOH = VCC − 0.3V at 4mA - drives CMOS/TTL loads directly without external pull-ups or level translators. |
| Power Supply Rejection Ratio | 750µV/V (min) - maintains stable trip points despite ripple or noise on VCC in battery-powered or switching-regulator environments. |
| Input Bias Current | 90nA to 320nA over temperature - minimizes loading error in high-impedance sensor interfaces (e.g., photodiode or thermistor networks). |
Pinout & Package
MAX9142EKA-T is housed in an 8-pin SOT23 package (package code K8-5), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant matte tin plating.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A open-drain/push-pull output - actively drives high/low to within 300mV of VCC/GND; compatible with 3.3V/5V logic families. |
| 2 | INA− | Comparator A inverting input - accepts rail-to-rail analog signals; internally protected against ±20mA continuous fault current. |
| 3 | INA+ | Comparator A noninverting input - identical protection and voltage range as INA−; differential input voltage limited to ±1.4V by internal diodes. |
| 4 | VCC | Positive supply pin - powers both comparators; requires local 0.1μF ceramic decoupling placed ≤2mm from pin. |
| 5 | INB+ | Comparator B noninverting input - electrically isolated from Channel A; enables independent dual-threshold monitoring. |
| 6 | INB− | Comparator B inverting input - matched offset and hysteresis to Channel A; supports <2ns inter-channel skew. |
| 7 | OUTB | Comparator B output - fully independent of OUTA; no shared output stage; supports asynchronous dual-event detection. |
| 8 | GND | Analog ground reference - must connect to low-impedance PCB ground plane; separates signal return from digital or power grounds. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Accepts inputs from −0.2V to VCC + 0.2V - eliminates need for external biasing in single-supply sensor front-ends. |
| Internal 1.5mV hysteresis | Prevents oscillation on slow-moving or noisy inputs - removes requirement for external positive-feedback resistors. |
| 40ns propagation delay | Supports accurate timing capture in 25MHz+ clock/data recovery and pulse-width discrimination applications. |
| 150μA per comparator supply current | Enables always-on threshold monitoring in battery-powered IoT nodes with multi-year runtime on coin cells. |
| CMOS/TTL-compatible outputs | Drives standard logic loads directly - avoids added buffer ICs and associated board space, cost, and propagation delay. |
Applications
| Line Receivers | Threshold Detectors |
|---|---|
|
Use Scenario: Detecting valid logic transitions on unterminated coaxial or twisted-pair lines in industrial fieldbus or legacy serial links. IC Role / Device Role / Timing Role: Dual comparator acting as differential line receiver with independent hysteresis per channel to reject EMI-induced glitches. Use Value: 40ns response enables reliable decoding of >10Mbps NRZ data without external Schmitt triggers or RC filtering. |
Use Scenario: Monitoring battery voltage against upper/lower thresholds to trigger charge control or low-power mode entry. IC Role / Device Role / Timing Role: Dual comparator providing simultaneous high-side and low-side voltage window detection with rail-to-rail input tracking. Use Value: 150μA total quiescent current allows continuous monitoring in energy-harvesting devices with μA-level budgets. |
| Zero-Crossing Detectors | Sampling Circuits |
|
Use Scenario: Converting AC sine waves (e.g., mains or audio) into clean square-wave timing references for phase-controlled dimmers or ADC synchronization. IC Role / Device Role / Timing Role: Comparator A configured as inverting zero-crossing detector with precision trip point near 0V; Comparator B unused or paralleled. Use Value: Input common-mode range down to −0.2V ensures correct triggering even with small negative excursions below GND. |
Use Scenario: Capturing analog waveform edges for time-of-flight measurement or pulse-width modulation feedback in motor control. IC Role / Device Role / Timing Role: Dual comparator generating start/stop timing pulses from rising/falling edges of a modulated signal. Use Value: ≤2ns inter-channel skew guarantees sub-nanosecond timing accuracy between edge-detection events. |
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 |
|---|---|---|---|
| LM393DR2G | Slower (1.3μs propagation delay), higher supply current (400μA), no rail-to-rail inputs (common-mode limited to VCC − 1.5V), no internal hysteresis. | Suitable only for DC or low-frequency (<10kHz) threshold detection; requires external hysteresis resistors and level-shifting for rail-to-rail sensors. | Select when cost is primary constraint and speed/power/rail-to-rail capability are not required. |
| TLV3502IDR | Faster (4.5ns), lower offset (1.5mV typ), rail-to-rail inputs/outputs, but higher supply current (1.2mA per comparator) and no internal hysteresis. | Better for ultra-high-speed sampling (>100MHz), but requires external hysteresis network and consumes >8× more power than MAX9142EKA-T. | Select when nanosecond timing resolution is critical and system can accommodate higher power and external components. |
Compared with LM393DR2G and TLV3502IDR, the MAX9142EKA-T uniquely balances 40ns speed, 150μA ultra-low power, rail-to-rail input operation, and built-in 1.5mV hysteresis - making it optimal for portable, battery-constrained, and EMI-prone applications where external component count and layout area must be minimized.
Availability
MAX9142EKA-T is available at Aetrix Electronics and suitable for line receivers, battery-powered systems, threshold detectors, and 3V/5V embedded control requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for MAX9142EKA-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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX9142EKA-T belongs to the MAX914x family of high-speed, low-power, single-supply comparators designed specifically for portable, battery-operated, and noise-sensitive applications demanding rail-to-rail input operation and minimal external components.
FAQ
What is the operating temperature range for MAX9142EKA-T?
The MAX9142EKA-T is specified for the E-grade industrial temperature range of −40°C to +85°C. This rating is guaranteed across all electrical parameters including propagation delay, offset voltage, and supply current - ensuring reliable performance in factory automation, outdoor instrumentation, and automotive cabin modules where ambient temperatures fluctuate widely. The device uses bipolar process technology and is not AEC-Q100 qualified.
Does MAX9142EKA-T include shutdown or latch functionality?
No, the MAX9142EKA-T does not include shutdown or latch functionality. Unlike the MAX9141, which features SHDN and LE pins, the MAX9142EKA-T is a pure dual comparator with only eight pins dedicated to power (VCC, GND), inputs (INA±, INB±), and outputs (OUTA, OUTB). Its operation is always active - there is no low-power sleep mode or output latching capability integrated into the MAX9142EKA-T silicon.
Can MAX9142EKA-T drive TTL and CMOS logic directly?
Yes, the MAX9142EKA-T outputs are CMOS/TTL-compatible and can drive both logic families directly. At VCC = 5V, VOL is ≤0.425V and VOH is ≥VCC − 0.3V (≥4.7V), satisfying TTL VOH min (2.4V) and CMOS VIH min (3.5V) thresholds. At VCC = 3.3V, VOH ≥3.0V meets 70% VCC CMOS requirements. No external pull-up resistors are needed due to its push-pull output stage.
What is the maximum capacitive load the MAX9142EKA-T output can drive while maintaining 40ns propagation delay?
The MAX9142EKA-T maintains ≤40ns propagation delay with up to 15pF capacitive load, as tested per the datasheet (CL = 15pF, VOD = 10mV). Increasing load capacitance degrades delay linearly - e.g., at 30pF, typical tPD increases to ~55ns. For loads >15pF, add a series resistor (10–50Ω) near the output to damp ringing without significantly affecting delay, especially in PCB traces longer than 5cm.
Is MAX9142EKA-T pin-compatible with other devices in the MAX914x family?
The MAX9142EKA-T shares the same 8-pin SOT23 pinout with the MAX9141EKA+T and MAX9142ESA+, but is not functionally pin-compatible with the MAX9141 due to missing SHDN and LE pins. Its pin mapping matches only the dual-comparator variants (MAX9142/MAX9144 Channel A+B); it cannot substitute for single (MAX9140) or quad (MAX9144) versions without PCB redesign.
MAX9142EKA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-8
- 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 @ 5V
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 300µA
- Current - Quiescent (Max):
- 81.94dB CMRR, 81.94dB PSRR
- CMRR, PSRR (Typ):
- 40ns
- Propagation Delay (Max):
- 1.5mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-8
MAX9142EKA-T FAQ
1.How can I place an order for MAX9142EKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9142EKA-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 MAX9142EKA-T reliable?
The price and inventory of MAX9142EKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9142EKA-T is usually 5 days.
3.What payment methods are accepted for MAX9142EKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9142EKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9142EKA-T?
MAX9142EKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9142EKA-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 MAX9142EKA-T?
For technical support, including MAX9142EKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9142EKA-T requirements.
6.How does Aetrix verify that MAX9142EKA-T is sourced from the original manufacturer or authorized distributors?
All MAX9142EKA-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 MAX9142EKA-T meets industry standards.
7.What is the process for return or replacement of MAX9142EKA-T?
All MAX9142EKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9142EKA-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 MAX9142EKA-T part is unused and in its original packaging.
Return procedure for MAX9142EKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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