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Analog Devices Inc./Maxim Integrated MAX917EUK-T
- Part No.:
- MAX917EUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX917EUK-T.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,997
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Product details
Overview
MAX917EUK-T from Maxim Integrated is a nanopower, rail-to-rail input comparator with integrated 1.245V ±1.5% reference, push-pull output, and guaranteed operation down to +1.8V supply. It draws only 750nA supply current, features Beyond-the-Rails™ input range (VEE −0.2V to VCC +0.2V), and delivers ±8mA output drive capability - making it ideal for 2-cell battery monitoring in portable medical instruments and telemetry systems.
For engineers reviewing the MAX917EUK-T datasheet, MAX917EUK-T pinout, MAX917EUK-T application, or MAX917EUK-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 this SOT23-5 comparator variant.
Technical Context
The MAX917EUK-T implements a CMOS push-pull output stage enabling rail-to-rail swing under ±8mA load, with crowbar-current-free switching that minimizes supply-current surges during transitions. Its input stage supports common-mode voltages beyond supply rails by ±200mV and includes internal 4mV hysteresis to prevent oscillation on slow or noisy inputs.
It integrates a PNP emitter-follower reference (1.245V, 95ppm/°C TC, 200kΩ output impedance) referenced to VEE, stable with any capacitive load. The device operates across −40°C to +85°C and is specified with 1.8V–5.5V supply voltage range and 1.0mV typical input offset voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 750nA at +25°C - enables multi-year battery life in 2-cell alkaline systems (e.g., >2.5 million hours at 1.8V) |
| Input Voltage Range | VEE −0.2V to VCC +0.2V - allows direct sensing at ground or supply rail without level-shifting |
| Reference Voltage | 1.245V ±1.5% - precision threshold source for battery voltage monitoring with <±18.7mV absolute error |
| Output Drive | ±8mA rail-to-rail - 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 - suitable for sub-10kHz threshold detection with predictable timing |
| Operating Voltage | 1.8V to 5.5V - compatible with single Li-ion, dual alkaline/NiMH, and 3.3V/5V system rails |
| Input Offset Voltage | 1mV (typ), 5mV (max) - ensures accurate trip-point stability even with low-signal sources like thermistors |
Pinout & Package
SOT23-5 package (U5+1 code), RoHS-compliant, 1.6mm × 2.9mm footprint, 1.1mm height - optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VEE | Negative supply reference | Ground or negative rail connection; reference point for internal 1.245V reference and comparator inputs |
| 2 - IN− (REF) | Inverting input / reference output | Dual-function pin: serves as comparator inverting input AND provides 1.245V reference voltage output |
| 3 - IN+ | Noninverting input | High-impedance (±0.15nA bias) node for sensing analog signals up to VCC +0.2V or down to VEE −0.2V |
| 4 - VCC | Positive supply | Accepts 1.8V–5.5V; powers internal reference, comparator core, and output drivers |
| 5 - OUT | CMOS push-pull output | Active-high/active-low digital output capable of sourcing/sinking ±8mA with rail-to-rail swing |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ input range | Enables direct measurement of signals at ground or supply rail without external resistive dividers or clamps |
| Integrated 1.245V ±1.5% reference | Eliminates need for external precision reference IC or resistor divider, reducing BOM count and layout area |
| Crowbar-current-free switching | Reduces supply-line transients by >90% vs. conventional comparators - cuts bypass capacitor requirements |
| Internal 4mV hysteresis | Prevents chatter on slow-moving or noisy inputs (e.g., thermistor outputs), eliminating need for external feedback |
| Ultra-low 750nA supply current | Extends 2xAA battery life to >280 days in continuous monitoring mode (1.8V, 750nA, 2400mAh cells) |
Applications
| 2-Cell Battery Monitoring | Ultra-Low-Power Telemetry |
|---|---|
Use Scenario: Monitoring voltage decay of dual alkaline or NiMH cells in remote sensor nodes. IC Role / Device Role / Timing Role: Comparator compares battery voltage against internal 1.245V reference to trigger low-battery alert. Use Value: Eliminates external reference and reduces quiescent current to 750nA - extends field deployment interval by 3× vs. µA-range comparators. |
Use Scenario: Wake-up circuit for LoRaWAN or NB-IoT end-nodes powered by coin cells. IC Role / Device Role / Timing Role: Threshold detector triggers MCU wake-up when environmental signal crosses preset level. Use Value: Push-pull output directly drives MCU interrupt pin; Beyond-the-Rails™ input accepts 0V-referenced sensor outputs without level shifters. |
| Medical Instrument Sensing | Threshold Discriminator in PDAs |
Use Scenario: Detecting ECG lead-off or temperature threshold breach in handheld diagnostic tools. IC Role / Device Role / Timing Role: High-impedance input senses microvolt-level biopotentials; internal hysteresis prevents false triggers. Use Value: Input bias current <0.15nA avoids loading sensitive electrode interfaces; 1.8V operation matches Li-ion battery discharge curve. |
Use Scenario: Backlight dimming control based on ambient light sensor output in legacy PDA designs. IC Role / Device Role / Timing Role: Compares photodiode amplifier output to fixed 1.245V reference to generate ON/OFF backlight enable signal. Use Value: SOT23-5 footprint fits tight board areas; rail-to-rail output cleanly drives PWM controller enable input across full 1.8–3.3V supply range. |
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, no internal reference, open-drain output, 1.8–5.5V operation | Lacks integrated reference; requires external voltage divider or reference for threshold setting | Preferred when lowest possible current (<320nA) is critical and system already provides reference or uses pull-up logic |
| MAX913ESA+ | 1.2µA supply current, no reference, push-pull output, wider temp range (−40°C to +125°C) | Higher current draw; lacks internal reference but offers extended industrial temperature rating | Chosen for high-temp environments where 1.2µA is acceptable and reference is supplied externally |
Compared with TLV3691IDBVR and MAX913ESA+, the MAX917EUK-T uniquely combines ultra-low 750nA current, integrated 1.245V reference, and push-pull output in SOT23-5 - delivering lowest BOM count and smallest footprint for battery-voltage monitoring where reference accuracy and output drive matter.
Availability
MAX917EUK-T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power telemetry, and portable medical instrument applications requiring stable component supply across long production lifecycles.
Supply support for MAX917EUK-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 battery monitoring - prioritizing sub-µA current, rail-compatible inputs, and integrated reference to simplify low-voltage threshold detection.
FAQ
What is the maximum load current the MAX917EUK-T output can drive?
The MAX917EUK-T push-pull output can sink and source up to ±8mA while maintaining rail-to-rail swing - verified at VCC = 5V, ISINK/ISOURCE = 8mA, and TA = +25°C. At 1.8V supply, it delivers ≥1mA sink/source capability, sufficient for driving logic inputs, small LEDs, or MOSFET gates in portable systems.
Does the MAX917EUK-T require external hysteresis for stable operation?
No - the MAX917EUK-T includes 4mV internal hysteresis, which prevents oscillation on slow-moving or noisy inputs like thermistor outputs. This eliminates the need for external positive-feedback resistors in most battery-monitoring and threshold-detection applications.
Can the MAX917EUK-T reference be used to bias other circuits?
Yes - the MAX917EUK-T's 1.245V reference (pin 2) is buffered and stable with any capacitive load, but its 200kΩ output impedance limits sourcing/sinking to ≤10nA. For higher-current use, buffer with a low-input-leakage op amp such as the MAX406 to avoid reference voltage droop.
What is the input common-mode voltage range of the MAX917EUK-T?
The MAX917EUK-T supports an input common-mode range from VEE −0.2V to VCC +0.2V - known as Beyond-the-Rails™ operation. This allows direct sensing of signals at ground (VEE) or above VCC (e.g., 5.2V on a 5V rail), eliminating level-shifters in battery-monitoring and supply-rail supervision circuits.
Is the MAX917EUK-T pin-compatible with other devices in the MAX917–MAX920 family?
Yes - all SOT23-5 variants (MAX917EUK-T, MAX918EUK-T, MAX919EUK-T, MAX920EUK-T) share identical pinout and footprint. However, MAX917EUK-T (push-pull + reference) is not functionally interchangeable with MAX918EUK-T (open-drain + reference) or MAX919EUK-T (push-pull, no reference) without circuit modification.
MAX917EUK-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:
- Obsolete
- Type:
- with Voltage Reference
- 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):
- 1.6µA
- Current - Quiescent (Max):
- 80dB PSRR
- CMRR, PSRR (Typ):
- 95µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
MAX917EUK-T FAQ
1.How can I place an order for MAX917EUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX917EUK-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 MAX917EUK-T reliable?
The price and inventory of MAX917EUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX917EUK-T is usually 5 days.
3.What payment methods are accepted for MAX917EUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX917EUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX917EUK-T?
MAX917EUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX917EUK-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 MAX917EUK-T?
For technical support, including MAX917EUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX917EUK-T requirements.
6.How does Aetrix verify that MAX917EUK-T is sourced from the original manufacturer or authorized distributors?
All MAX917EUK-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 MAX917EUK-T meets industry standards.
7.What is the process for return or replacement of MAX917EUK-T?
All MAX917EUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX917EUK-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 MAX917EUK-T part is unused and in its original packaging.
Return procedure for MAX917EUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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