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Analog Devices Inc./Maxim Integrated MAX920EUK+T
- Part No.:
- MAX920EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX920EUK+T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,011
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Product details
Overview
MAX920EUK+T from Maxim Integrated is a nanopower, open-drain output comparator in SOT23-5 package, guaranteed to operate from +1.8V to +5.5V supply, with 380nA typical supply current, ±0.15nA input bias current, and input voltage range extending 200mV beyond the rails (VEE − 0.2V to VCC + 0.2V). It is designed for ultra-low-power 2-cell battery monitoring and threshold detection in portable medical instruments and telemetry systems.
For engineers reviewing the MAX920EUK+T datasheet, MAX920EUK+T pinout, MAX920EUK+T application, or MAX920EUK+T equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternatives, and supply-chain support tailored for battery-powered embedded systems requiring sub-µA quiescent operation and rail-to-rail input capability.
Technical Context
The MAX920EUK+T implements a Beyond-the-Rails™ input stage with internal 4mV hysteresis, enabling stable switching on slow-moving or noisy signals without external components. Its open-drain output supports mixed-voltage logic translation up to 6V absolute maximum on the pull-up side, while eliminating crowbar current during transitions.
This device lacks an integrated reference (unlike MAX917/MAX918), relying on external voltage sources at IN−, and features a break-before-make output architecture that limits supply-current surges-critical for minimizing power-supply glitches in sensitive analog front-ends and long-life battery applications.
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 (per Table 1) |
| Input Voltage Range | VEE − 0.2V to VCC + 0.2V - allows direct sensing at ground or supply rail without level-shifting |
| Input Offset Voltage | 1mV to 5mV - ensures accurate threshold detection down to ±1mV precision in low-voltage systems |
| Propagation Delay | 30µs (low-to-high) / 95µs (high-to-low) at VCC = 5V - balances speed and ultra-low power for wake-up or alert circuits |
| Output Leakage Current | 0.001µA to 1µA - preserves signal integrity in high-impedance pull-up networks (e.g., 100kΩ RPULLUP) |
| Operating Temperature | −40°C to +85°C - qualified for industrial and portable medical environments without derating |
| Package | SOT23-5 (U5+1 code) - 2.9mm × 1.6mm footprint ideal for space-constrained PCBs in wearables and sensors |
Pinout & Package
SOT23-5 package (RoHS-compliant, + suffix), 2.9mm × 1.6mm body, 0.95mm height, 0.95mm pitch; thermal pad not present; JEDEC MO-178AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VEE) | Negative supply terminal | Reference ground node; accepts 0V or negative bias; must be connected for proper common-mode range |
| 2 (IN−) | Inverting input | Accepts reference or feedback voltage; supports inputs down to VEE − 0.2V (e.g., ground-referenced thresholds) |
| 3 (IN+) | Noninverting input | Monitors sensed signal; full rail-to-rail common-mode range enables direct connection to battery or sensor outputs |
| 4 (VCC) | Positive supply terminal | Supplies core logic and output stage; operates from 1.8V–5.5V; no internal regulator required |
| 5 (OUT) | Open-drain output | Requires external pull-up; sinks up to 8mA; supports voltage translation (e.g., 5V VCC → 3V logic rail) |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ input | Enables direct sensing at ground or supply rail without clamping diodes or external resistors |
| 380nA supply current | Extends battery life by >10× versus µA-range comparators in always-on monitoring circuits |
| Internal 4mV hysteresis | Eliminates oscillation on slow or noisy inputs-no external RC network needed for clean switching |
| Open-drain output | Supports wired-OR logic and mixed-voltage interfaces (e.g., 5V domain driving 3V MCU inputs) |
| Crowbar-current-free switching | Reduces supply-line noise and eliminates need for large local bypass capacitors in compact layouts |
Applications
| 2-Cell Battery Monitoring | Ultra-Low-Power Telemetry |
|---|---|
Use Scenario: Monitoring voltage decay across two alkaline cells in a remote environmental sensor node. IC Role / Device Role / Timing Role: Comparator compares cell voltage against fixed threshold to trigger low-battery alert interrupt. Use Value: 380nA quiescent current extends operational lifetime beyond 2.5 years on 750mAh cells (Table 1), with no wake-up latency penalty. |
Use Scenario: Detecting threshold crossings in a battery-powered soil moisture probe transmitting data every 15 minutes. IC Role / Device Role / Timing Role: Threshold detector wakes microcontroller only when moisture level crosses preset boundary. Use Value: Open-drain output interfaces directly to MCU's GPIO with 100kΩ pull-up, minimizing standby leakage and PCB area. |
| Medical Instrument Sensing | Logic-Level Translation |
Use Scenario: Detecting zero-crossing or amplitude thresholds in a portable ECG front-end with single 3.3V supply. IC Role / Device Role / Timing Role: Nanopower comparator conditions analog biosignal before ADC sampling. Use Value: Input range extending 200mV beyond rails allows direct connection to electrode amplifier outputs near ground or rail. |
Use Scenario: Translating 5V UART signals from a legacy module to a 3.3V microcontroller in a handheld diagnostic tool. IC Role / Device Role / Timing Role: Level shifter using MAX920EUK+T's open-drain output pulled to 3.3V. Use Value: Eliminates dedicated level-shifter IC; supports bidirectional signaling when combined with passive pull-down. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV3691IDBVR | 320nA supply current, rail-to-rail input, push-pull output, no internal hysteresis | Requires external hysteresis resistor network; unsuitable for direct open-drain bus interfacing | Select when lowest possible IQ is critical and push-pull drive is acceptable |
| MAX40002ANSR | 600nA supply current, internal 5mV hysteresis, open-drain output, 1.6V min supply | Higher IQ reduces battery life by ~60% vs. MAX920EUK+T in multi-year deployments | Select when wider supply range (1.6V–5.5V) or tighter hysteresis tolerance is required |
Compared with TLV3691IDBVR and MAX40002ANSR, the MAX920EUK+T uniquely combines 380nA IQ, built-in 4mV hysteresis, and open-drain output in SOT23-5-enabling simpler, longer-life designs for battery-critical sensing without external components or layout compromises.
Availability
MAX920EUK+T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power telemetry, and medical instrument sensing requiring stable component supply across industrial temperature ranges and multi-year production cycles.
Supply support for MAX920EUK+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 communications markets.
The MAX917–MAX920 family was engineered specifically for nanopower, rail-to-rail input comparators in space-constrained, battery-operated systems-prioritizing sub-µA IQ, Beyond-the-Rails™ operation, and robust switching behavior over raw speed.
FAQ
What is the supply voltage range for MAX920EUK+T?
The MAX920EUK+T operates from +1.8V to +5.5V across the full −40°C to +85°C temperature range. This wide range supports direct use with single Li-ion, dual alkaline, or regulated 3.3V/5V supplies without external regulators-making it ideal for flexible power architectures in portable electronics where supply rails may vary during battery discharge.
Does MAX920EUK+T include an internal voltage reference?
No, the MAX920EUK+T does not include an internal voltage reference. Unlike the MAX917/MAX918 variants, it is optimized for ultra-low supply current (380nA) by omitting the 1.245V reference circuitry. Users must provide an external reference or threshold voltage at the IN− pin, enabling greater flexibility in precision sensing applications where reference accuracy or temperature drift requirements exceed the integrated option.
What is the function of Pin 1 (VEE) on MAX920EUK+T?
Pin 1 (VEE) is the negative supply terminal and serves as the reference ground for the comparator's internal circuitry. It must be connected to system ground or a defined negative bias; floating VEE will cause undefined operation. The input common-mode range extends to VEE − 0.2V, allowing true ground-referenced sensing-critical for battery voltage monitoring and zero-crossing detection in single-supply systems.
Can MAX920EUK+T drive an LED directly?
No, the MAX920EUK+T cannot drive an LED directly. Its open-drain output is rated for 8mA sink current under specified conditions but lacks source capability. Driving an LED requires external current-limiting and a pull-up configuration (e.g., LED anode to VCC, cathode to OUT), limiting brightness control and efficiency. For LED indication, pair MAX920EUK+T with a discrete MOSFET or dedicated LED driver IC to avoid exceeding output voltage or current ratings.
How does the internal hysteresis of MAX920EUK+T improve reliability?
The MAX920EUK+T includes 4mV of internal hysteresis, which creates distinct rising and falling trip thresholds to prevent oscillation when input signals hover near the decision point-common in slow-moving sensor outputs or noisy environments. This eliminates the need for external positive-feedback resistors, reducing BOM count, PCB area, and design validation effort while ensuring clean, glitch-free digital output transitions in battery-powered monitoring systems.
MAX920EUK+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:
- Open-Drain
- 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):
- 12µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
MAX920EUK+T FAQ
1.How can I place an order for MAX920EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX920EUK+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 MAX920EUK+T reliable?
The price and inventory of MAX920EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX920EUK+T is usually 5 days.
3.What payment methods are accepted for MAX920EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX920EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX920EUK+T?
MAX920EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX920EUK+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 MAX920EUK+T?
For technical support, including MAX920EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX920EUK+T requirements.
6.How does Aetrix verify that MAX920EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX920EUK+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 MAX920EUK+T meets industry standards.
7.What is the process for return or replacement of MAX920EUK+T?
All MAX920EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX920EUK+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 MAX920EUK+T part is unused and in its original packaging.
Return procedure for MAX920EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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