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Analog Devices Inc./Maxim Integrated MAX919EUK+T
- Part No.:
- MAX919EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX919EUK+T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,280
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Product details
Overview
MAX919EUK+T from Maxim Integrated is a nanopower, push-pull output comparator in SOT23-5 package, featuring Beyond-the-Rails™ inputs (VEE − 0.2V to VCC + 0.2V), guaranteed operation down to +1.8V supply, and ultra-low 380nA supply current. It lacks an internal reference and delivers rail-to-rail CMOS output swing with ±8mA drive capability-ideal for 2-cell battery monitoring and ultra-low-power threshold detection.
For engineers reviewing the MAX919EUK+T datasheet, MAX919EUK+T pinout, MAX919EUK+T application, or MAX919EUK+T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to the MAX919EUK+T variant.
Technical Context
The MAX919EUK+T implements a break-before-make push-pull output stage that minimizes supply-current surges during switching-reducing supply glitches and eliminating need for large bypass capacitors. Its input stage supports common-mode voltages beyond both rails by 200mV and includes internal 4mV hysteresis to prevent oscillation with slow or noisy inputs.
Unlike MAX917/MAX918, it omits the 1.245V ±1.5% reference, enabling lower quiescent current (380nA vs. 750nA) and simplifying use where external reference or direct sensing is preferred. It shares identical SOT23-5 pinout and rail-to-rail output drive (±8mA) with MAX917 but excludes REF pin functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 380nA typical at +25°C - enables >2.5 million hours of operation on a 750mAh AA cell (1.8V cutoff) |
| Supply Voltage Range | +1.8V to +5.5V - supports direct interface with 2-cell alkaline (2.4–3.0V), Li-ion (3.0–4.2V), and regulated 3.3V/5V rails |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - allows ground-referenced or supply-referenced sensing without level-shifting |
| Output Drive Capability | ±8mA rail-to-rail CMOS push-pull - directly drives LEDs, logic inputs, or small MOSFET gates without external buffers |
| Propagation Delay | 30µs (low-to-high), 95µs (high-to-low) at VCC = 5V, CL = 15pF - balances speed and power for battery-critical wake-up circuits |
| Input Offset Voltage | 1mV typical, 5mV max - ensures reliable detection of sub-10mV signal thresholds in precision sensor interfaces |
| Input Bias Current | 0.15nA typical - preserves high-impedance source integrity (e.g., thermistors, photodiodes) without loading error |
Pinout & Package
SOT23-5 package (RoHS-compliant, moisture sensitivity level 1, 260°C reflow compatible). Small outline transistor package with gull-wing leads, 1.6mm × 2.9mm footprint, 1.1mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VEE) | Negative supply / ground reference | Connect to system ground or lowest potential; supports true ground-sensing applications |
| 2 (IN−) | Inverting input | Accepts signals from VEE − 0.2V to VCC + 0.2V; no phase reversal when overdriven |
| 3 (IN+) | Noninverting input | Same rail-to-rail common-mode range as IN−; used for threshold comparison against sensed voltage |
| 4 (VCC) | Positive supply | Supplies operating power; decoupling recommended if trace inductance >10nH or noise >10mVpp |
| 5 (OUT) | CMOS push-pull output | Sinks and sources up to ±8mA; outputs VEE or VCC depending on comparison result-no external pullup needed |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ inputs | Enables direct sensing at ground or supply rail without clamping diodes or level shifters |
| Crowbar-current-free switching | Eliminates supply current spikes during output transitions-reduces EMI and extends battery life |
| Internal 4mV hysteresis | Prevents chatter on slow-moving or noisy inputs (e.g., thermistor ramps, battery voltage decay) |
| Rail-to-rail CMOS push-pull output | Drives logic inputs, LEDs, or MOSFET gates directly-no external components required for basic interfacing |
| No internal reference | Lowers supply current by 49% vs. MAX917EUK+T and avoids reference load regulation errors in high-precision designs |
Applications
| 2-Cell Battery Monitoring | Ultra-Low-Power Threshold Detection |
|---|---|
|
Use Scenario: Monitoring voltage decay across two alkaline cells (2.4V fresh → 1.8V end-of-life) in portable medical sensors. IC Role / Device Role / Timing Role: Comparator compares battery voltage against fixed threshold to trigger low-battery alert before system brownout. Use Value: 380nA quiescent current extends usable battery life by >3× versus µA-range comparators, enabling multi-year operation. |
Use Scenario: Detecting zero-crossing of 100mVP-P AC signal in energy-harvesting IoT nodes. IC Role / Device Role / Timing Role: MAX919EUK+T configured as zero-crossing detector with IN− grounded and IN+ fed by AC source. Use Value: Beyond-the-Rails™ input accepts signal centered at ground without biasing network-reducing component count and leakage error. |
| Mobile Communications Power Sequencing | Telemetry Sensor Wake-Up Trigger |
|
Use Scenario: Enabling subsystem power rails only when main battery exceeds 2.8V in handheld radios. IC Role / Device Role / Timing Role: Acts as enable controller-OUT drives gate of high-side PMOS switch after threshold crossing. Use Value: ±8mA push-pull output directly drives 100Ω gate resistance of discrete PMOS, eliminating buffer IC and PCB area. |
Use Scenario: Waking ultra-low-power microcontroller from sleep when temperature exceeds 45°C (via NTC thermistor divider). IC Role / Device Role / Timing Role: Compares thermistor divider output to stable reference; OUT asserts interrupt to MCU. Use Value: Input bias current <0.2nA prevents voltage divider error-ensuring ±0.1°C accuracy in critical thermal shutdown paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX917EUK+T | Includes 1.245V ±1.5% reference; 750nA supply current; same SOT23-5 pinout but REF replaces IN− | Used when internal reference eliminates need for external precision voltage source | Select MAX917EUK+T only if reference integration justifies 97% higher supply current and modified input routing |
| TLV3691IDBVR | 320nA supply current, 1.8V min supply, open-drain output, no internal reference; SOT23-5 pinout differs (IN−/IN+ swapped) | Requires external pullup; suited for wired-OR bus or mixed-voltage logic translation | Choose TLV3691IDBVR only if open-drain output and lower current outweigh need for board redesign due to pin swap |
Compared with MAX919EUK+T, MAX917EUK+T adds reference functionality at cost of higher current and altered input assignment, while TLV3691IDBVR offers marginally lower current but requires layout changes and external pullup-making MAX919EUK+T optimal for push-pull, reference-free, drop-in SOT23-5 designs.
Availability
MAX919EUK+T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power threshold detection, and mobile communications power sequencing requiring stable component supply across industrial temperature range (−40°C to +85°C).
Supply support for MAX919EUK+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) designs precision analog and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and portable systems.
The MAX917–MAX920 family was engineered specifically for nanopower, rail-to-rail sensing in battery-constrained environments-prioritizing sub-µA operation, Beyond-the-Rails™ input flexibility, and glitch-free switching over raw speed.
FAQ
What is the maximum supply voltage for MAX919EUK+T?
The absolute maximum supply voltage (VCC to VEE) for MAX919EUK+T is +6V. Operating voltage range is specified from +1.8V to +5.5V, with full performance guaranteed across −40°C to +85°C. Exceeding +6V risks permanent damage per Absolute Maximum Ratings.
Does MAX919EUK+T have an internal voltage reference?
No, MAX919EUK+T does not include an internal voltage reference. It is the reference-free variant of the MAX917–MAX920 family. The MAX917EUK+T and MAX918EUK+T integrate a 1.245V ±1.5% reference; MAX919EUK+T and MAX920EUK+T omit it to achieve 380nA supply current.
Can MAX919EUK+T drive an LED directly?
Yes, MAX919EUK+T can drive an LED directly using its ±8mA push-pull output. For example, with VCC = 3.3V and a 1.8V red LED, a 180Ω series resistor limits current to ~6.7mA-within safe output capability and eliminating need for external transistor driver.
What is the input common-mode voltage range of MAX919EUK+T?
The input common-mode voltage range of MAX919EUK+T is VEE − 0.2V to VCC + 0.2V. This Beyond-the-Rails™ capability allows IN+ or IN− to be biased at ground (VEE) or above VCC-enabling direct sensing of signals referenced to either rail without external level-shifting circuitry.
Is MAX919EUK+T pin-compatible with MAX917EUK+T?
No, MAX919EUK+T is not pin-compatible with MAX917EUK+T. While both use SOT23-5 packages, MAX917EUK+T assigns Pin 2 to REF (1.245V output) and Pin 1 to VEE, whereas MAX919EUK+T uses Pin 2 for IN− and Pin 1 for VEE-requiring PCB layout change to substitute.
MAX919EUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- Beyond-the-Rails™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 5.5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.001µA @ 5V
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 1.2µA
- Current - Quiescent (Max):
- 66.02dB CMRR, 80dB PSRR
- CMRR, PSRR (Typ):
- 940µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
MAX919EUK+T FAQ
1.How can I place an order for MAX919EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX919EUK+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 MAX919EUK+T reliable?
The price and inventory of MAX919EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX919EUK+T is usually 5 days.
3.What payment methods are accepted for MAX919EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX919EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX919EUK+T?
MAX919EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX919EUK+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 MAX919EUK+T?
For technical support, including MAX919EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX919EUK+T requirements.
6.How does Aetrix verify that MAX919EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX919EUK+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 MAX919EUK+T meets industry standards.
7.What is the process for return or replacement of MAX919EUK+T?
All MAX919EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX919EUK+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 MAX919EUK+T part is unused and in its original packaging.
Return procedure for MAX919EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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