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Analog Devices Inc./Maxim Integrated MAX9144ESD
- Part No.:
- MAX9144ESD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9144ESD.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,699
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Product details
Overview
MAX9144ESD from Analog Devices is a quad high-speed comparator optimized for 3V/5V single-supply systems, delivering 40ns propagation delay, 150μA per comparator supply current, rail-to-rail inputs, and CMOS/TTL-compatible outputs - used in precision threshold detection and line receiver circuits.
For engineers reviewing the MAX9144ESD datasheet, MAX9144ESD pinout, MAX9144ESD application, or MAX9144ESD equivalent, key selection criteria include propagation delay skew (≤2ns), input offset voltage (≤2.0mV), rail-to-rail input common-mode range (–0.2V to VCC+0.2V), output swing within 300mV of rails, and 14-pin SO package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The MAX9144ESD implements a bipolar process-based comparator core with fixed 1.5mV internal hysteresis to suppress oscillation during slow input transitions. Its rail-to-rail input stage accepts voltages from –0.2V to VCC+0.2V, and its current-driven output stage delivers VOH ≥ VCC–0.425V and VOL ≤ 0.425V at 4mA load.
Four independent comparator channels share a common ground and VCC supply, with no inter-channel latch or shutdown control - unlike the MAX9141. Propagation delay matching between channels is specified at ≤2ns skew, supporting synchronized signal discrimination in multi-threshold applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 40ns at 10mV overdrive - enables reliable sampling of >10MHz digital edges. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct integration into 3.3V and 5V logic domains without level-shifting. |
| Input Offset Voltage | ≤2.0mV (max, –40°C to +85°C) - ensures accurate threshold detection down to millivolt-level differentials. |
| Rail-to-Rail Input Range | –0.2V to VCC+0.2V - allows interface with sensors or signals exceeding supply rails without clamping diodes. |
| Output Swing | Within 300mV of VCC or GND - directly drives CMOS/TTL inputs without external pull-ups. |
| Supply Current | 150μA per comparator at 3V - enables battery-powered operation with <600μA total quiescent draw. |
| Input Hysteresis | 1.5mV (typical) - eliminates chatter on noisy or slowly varying inputs without external feedback components. |
Pinout & Package
The MAX9144ESD is housed in a 14-pin SO (Small Outline) package with standard 1.27mm pitch, JEDEC MS-012AC compliant footprint, and exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Comparator A output - active-high, push-pull, capable of sourcing/sinking 4mA. |
| 2 | INA− | Comparator A inverting input - differential pair node with ±20mA fault tolerance to rails. |
| 3 | INA+ | Comparator A noninverting input - matched to INA− for low offset and drift. |
| 4 | VCC | Positive supply - powers all four comparators; decoupling capacitor required at pin. |
| 5 | INB+ | Comparator B noninverting input - electrically isolated from other channels; supports independent thresholds. |
| 6 | INB− | Comparator B inverting input - paired with INB+; shares same hysteresis and offset specs as INA±. |
| 7 | OUTB | Comparator B output - identical drive strength and timing to OUTA. |
| 8 | GND | Ground reference - return path for all supply and signal currents; must connect to low-impedance plane. |
| 9 | INC− | Comparator C inverting input - third independent channel input; matches INA−/INB− performance. |
| 10 | INC+ | Comparator C noninverting input - supports third threshold comparison with same accuracy. |
| 11 | OUTC | Comparator C output - synchronous switching with <2ns skew vs. OUTA/OUTB. |
| 12 | IND+ | Comparator D noninverting input - fourth independent threshold input. |
| 13 | IND− | Comparator D inverting input - completes quad-channel set; fully specified across temperature. |
| 14 | OUTD | Comparator D output - final channel output; maintains 40ns delay and rail-swing capability. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 1.5mV hysteresis | Eliminates need for external positive feedback resistors while ensuring clean, chatter-free switching on slow or noisy inputs. |
| Rail-to-rail input voltage range | Accepts signals from –0.2V to VCC+0.2V - enables direct connection to transducers, DACs, or op-amp outputs beyond supply limits. |
| CMOS/TTL-compatible outputs | Drives standard logic families without external pull-up resistors due to output swing within 300mV of VCC/GND. |
| Low 150μA per comparator supply current | Reduces total system power by >50% versus legacy comparators like MAX944, extending battery life in portable instruments. |
| Quad-channel layout with ≤2ns skew | Supports time-aligned multi-threshold decisions in sampling circuits, zero-crossing detectors, and line receivers. |
Applications
| Line Receivers | Threshold Detectors |
|---|---|
Use Scenario: Receiving differential or single-ended signals over coaxial or twisted-pair lines in industrial communication interfaces. IC Role / Device Role / Timing Role: Quad comparator acting as high-speed signal conditioner and logic-level translator for incoming analog waveforms. Use Value: 40ns delay and rail-to-rail inputs allow accurate reconstruction of fast-edged line signals without external biasing or amplification. | Use Scenario: Detecting when sensor outputs cross programmable voltage thresholds in battery-powered data loggers. IC Role / Device Role / Timing Role: Four independent voltage discriminators comparing analog sensor outputs against reference voltages. Use Value: 2.0mV max offset and 1.5mV hysteresis ensure stable, repeatable trip points across –40°C to +85°C without calibration. |
| Zero-Crossing Detectors | 3V/5V System Monitoring |
Use Scenario: Identifying AC waveform polarity transitions in motor control or power supply feedback loops. IC Role / Device Role / Timing Role: Comparator configured with grounded inverting input to detect sign change of AC-coupled sine waves. Use Value: Rail-to-rail input range accepts ±5V AC signals directly; 40ns response captures zero crossings up to 10MHz. | Use Scenario: Monitoring multiple supply rails (e.g., 1.8V, 3.3V, 5V) for undervoltage lockout or brownout detection. IC Role / Device Role / Timing Role: Quad comparator bank comparing each rail to dedicated reference voltages. Use Value: Single 3V–5.5V supply powers full quad channel set - simplifies BOM and PCB layout versus discrete solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Slower (1.3μs propagation delay), higher supply current (500μA/channel), no internal hysteresis, open-collector outputs requiring pull-ups. | Suitable only for low-speed, cost-sensitive applications where timing and rail-to-rail input are not required. | Select MAX9144ESD when 40ns timing, rail-to-rail inputs, or CMOS/TTL drive are mandatory. |
| TLV3704IPW | Lower supply current (80μA/channel), but slower (120ns), no internal hysteresis, rail-to-rail input only (not output), 14-pin TSSOP only. | Better for ultra-low-power systems with relaxed speed requirements and available board space for external hysteresis resistors. | Choose MAX9144ESD for guaranteed 40ns performance, built-in hysteresis, and true rail-swing outputs in SO package. |
Compared with LM339DR and TLV3704IPW, the MAX9144ESD delivers 32× faster propagation, integrated hysteresis eliminating external components, and push-pull outputs that reduce component count and improve noise immunity in timing-critical 3V/5V systems.
Availability
MAX9144ESD is available at Aetrix Electronics and suitable for line receivers, threshold detectors, zero-crossing detectors, and 3V/5V system monitoring requiring stable component supply across industrial temperature ranges.
Supply support for MAX9144ESD 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, headquartered in Wilmington, MA.
The MAX9144ESD belongs to the MAX914x family of high-speed, low-power, single-supply comparators designed specifically for precision signal conditioning in battery-powered and industrial 3V/5V systems.
FAQ
What is the maximum operating supply voltage for the MAX9144ESD?
The MAX9144ESD supports a maximum supply voltage of +6V between VCC and GND, with recommended operation from 2.7V to 5.5V. Exceeding +6V absolute maximum rating risks permanent damage, even briefly. The device is characterized and guaranteed over 2.7V–5.5V, making it ideal for both 3.3V and 5V system rails without regulation overhead. All electrical specifications in the datasheet assume VCC within this range.
Does the MAX9144ESD include internal hysteresis, and what is its value?
Yes, the MAX9144ESD includes fixed internal hysteresis of 1.5mV (typical), which is confirmed in the Electrical Characteristics table under "Input Hysteresis (VHYST)". This hysteresis prevents output oscillation during slow-moving or noisy input transitions without requiring external feedback resistors. It applies uniformly across all four comparator channels and remains stable over the full –40°C to +85°C operating range.
What is the input common-mode voltage range of the MAX9144ESD?
The MAX9144ESD features a rail-to-rail input common-mode voltage range of –0.2V to VCC+0.2V, as specified in the Electrical Characteristics table. This means either input (IN+ or IN–) can be driven 200mV below ground or 200mV above VCC without damage or false output inversion. This capability enables direct interfacing with sensors, DACs, or op-amps whose outputs exceed the supply rails - a key advantage over conventional comparators.
Can the MAX9144ESD drive TTL and CMOS logic directly?
Yes, the MAX9144ESD can drive both TTL and CMOS logic directly due to its push-pull output stage, which swings within 300mV of VCC (VOH ≥ VCC–0.425V) and GND (VOL ≤ 0.425V) at 4mA load. No external pull-up resistors are needed - unlike open-collector comparators. This simplifies PCB layout and improves noise margin in mixed-logic systems, and is explicitly confirmed in the Features section and Electrical Characteristics table.
Is the MAX9144ESD pin-compatible with other devices in the MAX914x family?
No, the MAX9144ESD is not pin-compatible with MAX9140, MAX9141, or MAX9142 due to differing channel counts and pin functions. The MAX9144ESD uses a 14-pin SO package with four fully independent comparator channels (no latch or shutdown pins), whereas MAX9141 (8-pin) includes LE/SHDN controls and MAX9140 (5-pin) is single-channel. Pin mapping is unique to each variant - verified via the Pin Description table and Pin Configurations diagrams in the datasheet.
MAX9144ESD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- CMOS, Push-Pull, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 2mV @ 5V
- Voltage - Input Offset (Max):
- 0.32µA @ 5V
- 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
- :
- 14-SOIC
MAX9144ESD FAQ
1.How can I place an order for MAX9144ESD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9144ESD 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 MAX9144ESD reliable?
The price and inventory of MAX9144ESD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9144ESD is usually 5 days.
3.What payment methods are accepted for MAX9144ESD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9144ESD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9144ESD?
MAX9144ESD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9144ESD 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 MAX9144ESD?
For technical support, including MAX9144ESD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9144ESD requirements.
6.How does Aetrix verify that MAX9144ESD is sourced from the original manufacturer or authorized distributors?
All MAX9144ESD 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 MAX9144ESD meets industry standards.
7.What is the process for return or replacement of MAX9144ESD?
All MAX9144ESD units undergo pre-shipment inspection (PSI). If there is an issue with MAX9144ESD, 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 MAX9144ESD part is unused and in its original packaging.
Return procedure for MAX9144ESD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX9144ESD Tags
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