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Analog Devices Inc./Maxim Integrated MAX9648AUK+T
- Part No.:
- MAX9648AUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX9648AUK+T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,852
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Product details
Overview
MAX9648AUK+T from Maxim Integrated is a single, low-voltage, open-drain comparator in a 5-pin SOT23 package, featuring internal 2mV hysteresis for noise immunity, 60µA supply current at +5V, and operation from +1.8V to +5.5V. It supports ground-sensing inputs and delivers 120mV output saturation voltage at 4mA sink, enabling reliable threshold detection in battery-powered portable electronics.
For engineers reviewing the MAX9648AUK+T datasheet, MAX9648AUK+T pinout, MAX9648AUK+T application, or MAX9648AUK+T equivalent, key selection considerations include hysteresis-enabled noise rejection, SC70/SOT23 footprint compatibility with LMX331H drop-in replacement requirements, automotive-grade temperature range (–40°C to +125°C), and low-input-bias-current performance (<250nA) for high-impedance sensing circuits.
Technical Context
The MAX9648AUK+T implements a BiCMOS comparator core optimized for low-voltage, single-supply operation with rail-to-rail input common-mode range extending 0.1V below VSS and up to 0.7V below VDD. Its internal hysteresis is fixed at 2mV and non-adjustable, eliminating external feedback components while ensuring stable switching against slow-moving or noisy signals.
It features open-drain output architecture requiring an external pull-up resistor, supports overdrive-dependent propagation delays (tPLH = 100ns, tPHL = 50ns at 100mV overdrive, VDD = 5V), and maintains PSRR of 60–90dB across 1.8V–5.5V supply range - critical for mixed-signal environments with noisy power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V - enables direct interface with Li-ion, 3.3V, and 5V logic domains without level-shifting. |
| Input Offset Voltage | 0.4mV (typ), 9mV (max, –40°C to +125°C) - ensures accurate threshold detection in precision sensing applications. |
| Hysteresis | 2mV (internal, fixed) - prevents chatter on slow or noisy inputs without external resistors or layout complexity. |
| Propagation Delay | tPHL = 50ns, tPLH = 100ns (100mV overdrive, VDD = 5V) - supports response to fast transients in real-time monitoring systems. |
| Supply Current | 60µA per channel at VDD = +5V - extends battery life in always-on portable devices such as wearables and IoT sensors. |
| Input Common-Mode Range | –0.1V to VDD – 0.7V - allows ground-referenced input signals and simplifies sensor interfacing. |
| Output Saturation Voltage | 120mV at ISINK = 4mA - ensures strong low-state drive into typical microcontroller GPIOs or logic inputs. |
Pinout & Package
MAX9648AUK+T is housed in a 5-pin SOT23 package (2.9mm × 1.6mm × 1.1mm), compatible with standard pick-and-place equipment and offering thermal resistance ΘJA = 255.9°C/W (JEDEC 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN+ | Noninverting Input | Accepts analog signal to be compared against IN–; supports common-mode down to –0.1V (below GND). |
| 2 VSS | Negative Supply | Must be connected to system ground (0V); serves as reference for input and output stages. |
| 3 IN– | Inverting Input | Accepts reference voltage or inverted signal path; no phase reversal when overdriven. |
| 4 OUT | Open-Drain Output | Requires external pull-up resistor; sinks up to 35mA; logic-low state defined by VOL ≤ 120mV @ 4mA. |
| 5 VDD | Positive Supply | Supplies operating power; accepts +1.8V to +5.5V; bypass capacitor (0.1µF) required between VDD and VSS. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2mV hysteresis | Eliminates need for external positive feedback network, reducing BOM count and PCB area in space-constrained designs. |
| –40°C to +125°C operation | Validated for automotive under-hood and industrial edge-node deployments without derating. |
| No phase reversal on overdrive | Prevents erroneous output states when inputs exceed common-mode limits - critical for fault-detection circuits. |
| Low input bias current (≤250nA) | Minimizes loading error on high-impedance sources like thermistors or photodiodes. |
| RF immunity | Robust operation in electrically noisy environments (e.g., motor drives, wireless modules) without added filtering. |
Applications
| Battery Voltage Monitor | Overvoltage Protection Circuit |
|---|---|
|
Use Scenario: Detecting low battery condition in handheld medical devices using a resistive divider from Li-ion cell to comparator inputs. IC Role / Device Role / Timing Role: Threshold comparator with hysteresis ensures clean, bounce-free alert generation during gradual discharge. Use Value: 2mV internal hysteresis prevents false triggers caused by ripple or load-switching noise, extending usable battery runtime before shutdown. |
Use Scenario: Monitoring DC bus voltage in portable power tools to disable motor driver if input exceeds safe limit. IC Role / Device Role / Timing Role: Fast-response comparator driving enable/disable logic for gate driver ICs. Use Value: 50ns propagation delay (tPHL) at 100mV overdrive enables sub-100ns fault response, protecting MOSFETs from overvoltage stress. |
| Portable Sensor Interface | Smartphone Proximity Detection |
|
Use Scenario: Converting analog output from ambient light sensor into digital ON/OFF signal for display backlight control. IC Role / Device Role / Timing Role: Ground-sensing comparator interfacing directly with photodiode amplifier output. Use Value: Input common-mode range including ground allows direct connection to op-amp output without level-shifting, reducing component count and power loss. |
Use Scenario: Detecting proximity of user's ear during phone call using infrared LED/phototransistor pair. IC Role / Device Role / Timing Role: Low-power comparator sampling IR detector output with minimal quiescent current draw. Use Value: 60µA supply current at 5V enables continuous monitoring during active calls without impacting standby battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMX331HMM/NOPB | No internal hysteresis; requires external feedback resistors for noise immunity; higher supply current (130µA typ). | Suitable where adjustable hysteresis is needed or where legacy LMX331H pinout must be retained without redesign. | Select only if hysteresis must be programmable or if existing layout uses LMX331H-specific routing. |
| TLV3701IDBVR | Higher input offset (3.5mV max), no guaranteed hysteresis, but includes push-pull output (no pull-up required). | Better suited for systems needing active-high output drive without external components, but less robust against noise. | Choose when output drive strength and simplicity outweigh noise immunity requirements in low-noise environments. |
Compared with LMX331HMM/NOPB and TLV3701IDBVR, the MAX9648AUK+T uniquely combines fixed 2mV hysteresis, ultra-low supply current, and guaranteed –40°C to +125°C performance in a drop-in SOT23 package - making it optimal for cost-sensitive, noise-prone, battery-operated applications where reliability and layout simplicity are prioritized.
Availability
MAX9648AUK+T is available at Aetrix Electronics and suitable for battery-powered electronics, portable medical devices, and industrial sensor nodes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX9648AUK+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 industrial, automotive, communications, and consumer markets.
The MAX9647/MAX9648 family was developed to deliver cost-effective, low-voltage comparators with integrated hysteresis and wide temperature capability for portable and harsh-environment applications.
FAQ
What is the operating temperature range of the MAX9648AUK+T?
The MAX9648AUK+T is specified for continuous operation from –40°C to +125°C, validated across all electrical parameters per the datasheet's DC and AC characteristics tables. This range supports deployment in automotive cabin modules, industrial controllers, and outdoor portable equipment without thermal derating.
Does the MAX9648AUK+T require external hysteresis components?
No. The MAX9648AUK+T integrates a fixed 2mV hysteresis band, eliminating the need for external resistors or feedback networks. This simplifies design, reduces PCB area, and improves consistency across production units - unlike the MAX9647 or LMX331H, which lack internal hysteresis.
What is the maximum sink current capability of the MAX9648AUK+T output?
The MAX9648AUK+T output can sink up to 35mA while maintaining VOL ≤ 400mV (at TA = –40°C to +85°C, VDD = 5V). At room temperature and 4mA load, VOL is typically 120mV - sufficient to drive standard logic inputs or small LEDs directly with appropriate pull-up configuration.
Is the MAX9648AUK+T pin-compatible with the LMX331H?
Yes. The MAX9648AUK+T is explicitly described in its datasheet as a "drop-in, pin-for-pin compatible replacement" for the LMX331H in both SC70 and SOT23 packages. Pin functions, spacing, and mechanical dimensions match, enabling direct substitution without PCB modification.
What supply voltage range does the MAX9648AUK+T support?
The MAX9648AUK+T operates from +1.8V to +5.5V, covering single-cell Li-ion (3.0–4.2V), 3.3V logic, and 5V legacy systems. Performance parameters including propagation delay, offset voltage, and supply current are fully characterized across this range per the datasheet's 1.8V, 2.7V, and 5.0V test conditions.
MAX9648AUK+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:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 5.5V
- :
- 7mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 35mA
- Current - Output (Typ):
- 120µA
- Current - Quiescent (Max):
- 90dB PSRR
- CMRR, PSRR (Typ):
- 110ns
- Propagation Delay (Max):
- 2mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
MAX9648AUK+T FAQ
1.How can I place an order for MAX9648AUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9648AUK+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 MAX9648AUK+T reliable?
The price and inventory of MAX9648AUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9648AUK+T is usually 5 days.
3.What payment methods are accepted for MAX9648AUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9648AUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9648AUK+T?
MAX9648AUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9648AUK+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 MAX9648AUK+T?
For technical support, including MAX9648AUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9648AUK+T requirements.
6.How does Aetrix verify that MAX9648AUK+T is sourced from the original manufacturer or authorized distributors?
All MAX9648AUK+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 MAX9648AUK+T meets industry standards.
7.What is the process for return or replacement of MAX9648AUK+T?
All MAX9648AUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9648AUK+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 MAX9648AUK+T part is unused and in its original packaging.
Return procedure for MAX9648AUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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