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Analog Devices Inc./Maxim Integrated MAX9646EUK+T
- Part No.:
- MAX9646EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX9646EUK+T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,452
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Product details
Overview
MAX9646EUK+T from Maxim Integrated is a nanoPower single comparator with integrated 0.2V precision reference, noninverting input configuration, and push-pull output stage-designed for ultra-low-power, space-constrained portable systems operating from 1.0V to 5.5V supply. It delivers 15µs propagation delay, ±0.9mV internal hysteresis, and 700nA max supply current across -40°C to +85°C, enabling direct interface with microcontroller I/O without external pull-up resistors in battery-powered medical sensors and notebook power monitoring.
For engineers reviewing the MAX9646EUK+T datasheet, MAX9646EUK+T pinout, MAX9646EUK+T application, or MAX9646EUK+T equivalent, key selection criteria include its push-pull output eliminating external pull-ups, guaranteed 1% reference accuracy over temperature, RF-immune input architecture supporting inputs up to +5.5V independent of VCC, and validated operation down to 1.0V supply voltage in SOT23-5 packaging.
Technical Context
The MAX9646EUK+T implements a BiCMOS input stage enabling rail-to-rail input voltage range (-0.3V to +5.5V) independent of VCC, maintaining high input impedance even when powered down (VCC = 0V). Its internal 0.2V reference is trimmed to ±1% at +25°C and exhibits 6µV/°C tempco, contributing to stable trip-point accuracy across temperature.
This device uses a break-before-make output driver topology to minimize supply current spikes during transitions. The push-pull output sinks up to 1.2mA and sources up to 0.75mA while maintaining VOH ≥ VCC – 0.24V and VOL ≤ 0.5V across full supply and load ranges, ensuring robust logic-level compatibility with 1.8V/3.3V/5V microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.0V to 5.5V - enables direct use with single-cell Li-ion, coin-cell, or low-voltage MCU rails without level-shifting. |
| Max Supply Current | 700nA - supports >10-year battery life in always-on sensor wake-up circuits. |
| Reference Voltage | 0.2V ±1% (25°C), ±3.5% (-40°C to +85°C) - provides stable threshold for low-voltage brown-out detection or battery voltage monitoring. |
| Propagation Delay | 15µs (typ, 100mV overdrive) - sufficient for slow-varying signals like battery voltage or temperature thresholds. |
| Input Voltage Range | -0.3V to +5.5V independent of VCC - allows monitoring of external analog signals exceeding supply rail (e.g., 5V sensor outputs on 1.8V system). |
| Output Type | Push-pull - eliminates need for external pull-up resistor, reducing BOM count and PCB area in space-critical designs. |
| Hysteresis | ±0.9mV - suppresses noise-induced false triggering on noisy input traces without requiring external feedback components. |
Pinout & Package
The MAX9646EUK+T is packaged in a RoHS-compliant 5-pin SOT23 (U5+2) with 1.6mm × 2.9mm footprint and 1.1mm height, optimized for automated assembly and thermal performance (312mW max power dissipation at +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply input - requires 0.1µF ceramic bypass capacitor to GND for stable operation during output switching. |
| 2 | GND | Analog/digital ground reference - shared return path for supply and signal; must be low-impedance connection. |
| 3 | GND | Second ground terminal - improves thermal dissipation and reduces ground bounce in high-noise environments. |
| 4 | IN | Noninverting input - compares applied signal against internal 0.2V reference; accepts voltages beyond VCC. |
| 5 | OUT | Push-pull output - actively drives high or low; compatible with CMOS/TTL logic without external pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 700nA max ensures minimal battery drain in always-on monitoring applications such as wearable health sensors. |
| Integrated 0.2V reference | Trimmed to ±1% at +25°C and stabilized by on-chip temperature compensation (6µV/°C), enabling accurate low-threshold detection. |
| Rail-to-rail input capability | Supports input signals from -0.3V to +5.5V regardless of VCC, allowing direct interfacing with legacy 5V sensors on modern low-voltage systems. |
| RF-immune input architecture | On-chip filtering prevents false triggering from GSM/Bluetooth interference, critical for cellular-enabled portable devices. |
| Power-down high-impedance inputs | Maintains >1GΩ input impedance when VCC = 0V, enabling safe "hot-swap" of signal sources during system sleep modes. |
Applications
| Battery Voltage Monitor | Low-Power Wake-Up Sensor |
|---|---|
|
Use Scenario: Detecting when a single-cell Li-ion battery drops below 3.0V to trigger MCU sleep mode or alert. IC Role / Device Role / Timing Role: Comparator comparing battery voltage (divided) against internal 0.2V reference scaled via resistor network. Use Value: Eliminates external reference IC and pull-up resistor, reducing component count and leakage paths in battery management circuitry. |
Use Scenario: Monitoring ambient light or motion sensor output to wake an MCU from deep sleep only when threshold is exceeded. IC Role / Device Role / Timing Role: NanoPower threshold detector providing clean digital edge to MCU interrupt pin with <15µs latency. Use Value: 700nA supply current extends sensor node battery life to multi-year operation without maintenance. |
| Notebook System Power Sequencing | Portable Medical Glucose Sensor |
|
Use Scenario: Validating proper ramp-up of core voltage rails before enabling CPU clock or memory controller. IC Role / Device Role / Timing Role: Precision voltage supervisor using internal 0.2V reference and resistor divider to monitor 0.8V–1.2V rail tolerances. Use Value: Push-pull output directly drives FPGA configuration enable without level translation, simplifying power-good signaling. |
Use Scenario: Converting electrochemical sensor output (sub-100mV) into digital trigger for glucose concentration alarm. IC Role / Device Role / Timing Role: Low-noise, low-offset comparator detecting minute analog changes with built-in hysteresis to prevent chatter. Use Value: ±0.9mV hysteresis and RF filtering ensure reliable detection in EMI-rich clinical environments without external filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator-with-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9644EUK+ | Same package and reference, but open-drain output requiring external pull-up resistor. | Suitable where output must interface with higher-voltage logic (e.g., 5V MCU I/O) or wired-OR bus configurations. | Select MAX9644EUK+ only if system requires level-shiftable or shared-bus output behavior. |
| TLV3691IDBVR | 0.4V reference, 600nA typical supply current, SOT23-5, but no internal hysteresis or RF filtering. | Applicable in cost-sensitive, non-EMI-critical applications where external hysteresis can be added. | Choose TLV3691IDBVR only when reference voltage flexibility outweighs need for integrated noise immunity and hysteresis. |
Compared with MAX9644EUK+, the MAX9646EUK+T eliminates pull-up components and simplifies layout; compared with TLV3691IDBVR, it delivers guaranteed hysteresis and RF immunity essential for medical and portable consumer designs without adding external components.
Availability
MAX9646EUK+T is available at Aetrix Electronics and suitable for battery voltage monitoring, portable medical sensor interfaces, and notebook power sequencing requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX9646EUK+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, mixed-signal, and power-management ICs for demanding industrial, medical, and portable applications.
The MAX964x family targets ultra-low-power portable electronics needing integrated reference comparators in miniature packages-specifically addressing board space, battery life, and EMI resilience in cell phones, wearables, and handheld diagnostics.
FAQ
What is the maximum input voltage the MAX9646EUK+T can tolerate relative to VCC?
The MAX9646EUK+T supports an input voltage range of -0.3V to +5.5V independent of VCC, meaning inputs may exceed the supply rail by several volts-unlike conventional comparators limited by ESD diode clamps. This allows direct monitoring of 5V sensor outputs on a 1.8V-powered MAX9646EUK+T system without external level-shifting circuitry.
Does the MAX9646EUK+T require an external pull-up resistor on its output?
No, the MAX9646EUK+T features a push-pull output stage that actively drives both high and low states, eliminating the need for an external pull-up resistor. This reduces component count and PCB area-particularly valuable in space-constrained portable designs where the MAX9646EUK+T is commonly deployed.
What is the accuracy and stability of the internal 0.2V reference in the MAX9646EUK+T?
The MAX9646EUK+T's internal reference is trimmed to ±1% accuracy at +25°C and maintains ±3.5% over the full -40°C to +85°C operating range. Its 6µV/°C tempco and supply-voltage independence ensure stable trip points for precision low-voltage detection tasks such as battery end-of-life indication in the MAX9646EUK+T.
Can the MAX9646EUK+T operate from a 1.0V supply, and what is its supply current at that voltage?
Yes, the MAX9646EUK+T is fully specified down to VCC = 1.0V, with supply current of 0.4µA (typ) to 0.7µA (max) at this voltage-enabling compatibility with emerging ultra-low-voltage microcontrollers and energy-harvesting systems where the MAX9646EUK+T serves as the primary wake-up element.
How does the MAX9646EUK+T handle RF interference on its input pins?
The MAX9646EUK+T incorporates on-chip filtering specifically designed to reject RF noise, including GSM and Bluetooth frequencies, preventing false triggering caused by electromagnetic coupling into input traces-a critical feature validated in portable electronics applications where the MAX9646EUK+T is used for reliable sensor interfacing.
MAX9646EUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Push-Pull
- Voltage - Supply, Single/Dual (±):
- 1V ~ 5.5V
- :
- -
- Voltage - Input Offset (Max):
- 0.015µA
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 1.1µA
- Current - Quiescent (Max):
- 53dB PSRR
- CMRR, PSRR (Typ):
- 15µs
- Propagation Delay (Max):
- 0.9mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
MAX9646EUK+T FAQ
1.How can I place an order for MAX9646EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9646EUK+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 MAX9646EUK+T reliable?
The price and inventory of MAX9646EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9646EUK+T is usually 5 days.
3.What payment methods are accepted for MAX9646EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9646EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9646EUK+T?
MAX9646EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9646EUK+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 MAX9646EUK+T?
For technical support, including MAX9646EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9646EUK+T requirements.
6.How does Aetrix verify that MAX9646EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX9646EUK+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 MAX9646EUK+T meets industry standards.
7.What is the process for return or replacement of MAX9646EUK+T?
All MAX9646EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9646EUK+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 MAX9646EUK+T part is unused and in its original packaging.
Return procedure for MAX9646EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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