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Analog Devices Inc./Maxim Integrated MAX9109EUT+T
- Part No.:
- MAX9109EUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-6
- Datasheet:
-
MAX9109EUT+T.pdf
- Description:
- IC COMPARATOR 1 W/LATCH SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,855
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Product details
Overview
MAX9109EUT+T from Maxim Integrated is a single, high-speed, low-power TTL-compatible voltage comparator with internal latch, designed for precision threshold detection in 4.5V–5.5V single-supply systems. It delivers 25ns propagation delay (10mV overdrive), 350µA supply current per comparator, and 500µV typical input offset voltage, enabling fast, stable decision-making in battery-powered infrared receivers and A/D converter front-ends.
For engineers reviewing the MAX9109EUT+T datasheet, MAX9109EUT+T pinout, MAX9109EUT+T application, or MAX9109EUT+T equivalent, key selection criteria include latch-enable timing (2ns setup/hold), SC70/SOT23-6 package compatibility, TTL output drive capability (3.2mA sink), and guaranteed -40°C to +85°C operation without external pullups or hysteresis components.
Technical Context
The MAX9109EUT+T implements a bipolar comparator core with fixed 2mV internal hysteresis to suppress oscillation during slow input transitions, eliminating need for external feedback resistors. Its latch function operates synchronously on LE high, capturing comparator state with 2ns setup and hold times relative to LE edge.
Input common-mode range spans -0.2V to VCC–1.5V, supporting ground-referenced inputs and rail-to-rail signal monitoring. Output stages are fully TTL-compatible-VOH ≥ 3.0V at 100µA source, VOL ≤ 0.6V at 3.2mA sink-enabling direct interface with 74LS/TTL logic without pullup resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 25ns at 10mV input overdrive - enables sub-40MHz sampling in zero-crossing detectors and line receivers. |
| Supply Current | 350µA per comparator at VCC = 5.5V - supports ultra-low-power operation in battery-backed systems. |
| Input Offset Voltage | 0.5–4.0mV over temperature - ensures <±2mV trip-point uncertainty in precision threshold discriminators. |
| Input Common-Mode Range | -0.2V to VCC–1.5V - allows direct sensing of signals referenced to ground or near-rail voltages. |
| Latch Enable Timing | 2ns setup/hold time - permits reliable latching with standard 5V CMOS clock edges. |
| Output Drive | TTL-compatible: VOH ≥ 3.0V (100µA), VOL ≤ 0.6V (3.2mA) - interfaces directly with legacy 74LS logic without external components. |
| Hysteresis | 2mV input-referred - prevents chatter on noisy or slowly varying inputs without external circuitry. |
Pinout & Package
MAX9109EUT+T is packaged in a 6-pin SOT23-6 (U6-1) surface-mount package with 1.27mm pitch, optimized for space-constrained PCB layouts while maintaining thermal performance up to 696mW at +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply input (4.5V–5.5V); requires local 0.1µF ceramic decoupling. |
| 2 | OUT | TTL-compatible open-collector-equivalent output; sinks up to 3.2mA, sources minimal current. |
| 3 | IN+ | Noninverting input; accepts signals from -0.2V to VCC–1.5V common-mode range. |
| 4 | IN- | Inverting input; matched to IN+ for differential or single-ended threshold comparison. |
| 5 | LE | Latch enable input; comparator output latched on rising edge when LE transitions high. |
| 6 | GND | Analog/digital ground reference; must connect to low-inductance ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 2mV hysteresis | Eliminates external feedback network, ensuring clean switching on slow-moving or noisy inputs without design overhead. |
| Latch function (LE-controlled) | Freezes comparator decision at precise system timing points, enabling synchronized sampling in data acquisition circuits. |
| TTL-compatible outputs | Direct interface with 74LS/ALS logic families; no pullup resistors required, reducing BOM count and layout area. |
| Ultra-low 350µA supply current | Extends battery life in portable IR receivers and sensor nodes where continuous monitoring is required. |
| Ground-inclusive input range | Supports direct connection of ground-referenced sensors (e.g., thermistors, photodiodes) without level-shifting circuitry. |
Applications
| Battery-Powered Infrared Data Link | A/D Converter Threshold Detection |
|---|---|
Use Scenario: Low-power IR receiver detecting modulated 38kHz carrier pulses in remote control systems. IC Role / Device Role / Timing Role: Comparator stage converting photodiode amplifier output into clean digital pulses for microcontroller decoding. Use Value: 350µA quiescent current and 25ns response enable full-system current draw under 760µA while preserving pulse fidelity. | Use Scenario: Front-end comparator generating start-of-conversion strobes for successive-approximation ADCs. IC Role / Device Role / Timing Role: Precision threshold detector triggering conversion when analog input crosses reference voltage. Use Value: 500µV offset and 2mV hysteresis ensure ±1.5mV trip-point accuracy across -40°C to +85°C, minimizing quantization error. |
| Line Receiver for Digital Signals | Zero-Crossing Detector for AC Monitoring |
Use Scenario: Receiving degraded or attenuated digital signals over long cables in industrial control networks. IC Role / Device Role / Timing Role: High-speed comparator restoring logic levels and rejecting noise-induced false transitions. Use Value: 25ns propagation delay and internal hysteresis allow reliable recovery of signals with >40MHz edge rates and >2mV noise margins. | Use Scenario: Detecting AC waveform zero crossings in power metering or motor phase-control applications. IC Role / Device Role / Timing Role: Precision comparator identifying exact polarity reversal point of transformer-coupled or resistor-divider AC inputs. Use Value: Ground-inclusive input range (-0.2V to VCC–1.5V) enables direct connection to center-tapped or biased AC sources without DC blocking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | No internal latch; 1.3µs typical propagation delay; no guaranteed hysteresis; wider supply range (2–36V). | Suitable for general-purpose, non-latched, wide-voltage comparator use but lacks timing precision and noise immunity of MAX9109EUT+T. | Select LM393DR only when latch functionality and sub-30ns speed are unnecessary and supply voltage exceeds 5.5V. |
| TLV3201DBVR | CMOS input stage; 40ns propagation delay; rail-to-rail input; no latch; 65µA supply current. | Better for ultra-low-power, high-impedance sensor interfaces but slower and incompatible with TTL logic loads without level translation. | Choose TLV3201DBVR when input bias current (<1pA) or rail-to-rail input is critical, and TTL compatibility is not required. |
Compared with LM393DR and TLV3201DBVR, the MAX9109EUT+T uniquely combines TTL output drive, internal latch, 25ns speed, and 2mV hysteresis in a 6-pin SOT23 package-making it optimal for time-critical, noise-prone, single-5V systems requiring deterministic sampling.
Availability
MAX9109EUT+T is available at Aetrix Electronics and suitable for battery-powered infrared receivers, A/D converter front-ends, and zero-crossing detectors requiring stable component supply across automotive, industrial, and medical device production cycles.
Supply support for MAX9109EUT+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 demanding industrial, automotive, and communications applications.
The MAX9107/MAX9108/MAX9109 family targets high-speed, low-power comparator applications in space- and power-constrained systems where TTL compatibility, latch control, and noise immunity are essential.
FAQ
What is the operating supply voltage range for MAX9109EUT+T?
The MAX9109EUT+T operates from a single 4.5V to 5.5V supply, with guaranteed performance across this range. It is not rated for operation below 4.5V or above 5.5V; exceeding these limits may cause functional failure or reduced reliability. The MAX9109EUT+T draws 350µA per comparator at 5.5V, making it ideal for regulated 5V systems such as USB-powered instrumentation or industrial controllers where supply stability is assured.
Does MAX9109EUT+T require external pullup resistors on its output?
No, MAX9109EUT+T does not require external pullup resistors because its output is fully TTL-compatible-capable of sourcing ≥3.0V at 100µA and sinking ≤0.6V at 3.2mA. This allows direct connection to 74LS, 74ALS, and other TTL logic families without additional components. The MAX9109EUT+T output stage is designed to meet TTL voltage thresholds across temperature and process variation, eliminating layout complexity and BOM cost associated with pullup networks.
How does the internal latch in MAX9109EUT+T function?
The internal latch in MAX9109EUT+T is controlled by the LE (Latch Enable) pin: when LE is low, the comparator output is transparent and follows input changes; when LE goes high, the current output state is captured and held until LE returns low. Setup and hold times are both 2ns, enabling synchronization with fast 5V CMOS clocks. This feature makes MAX9109EUT+T suitable for sampled-data systems like gated comparators in oscilloscopes or time-of-flight sensors where decision timing must be precisely controlled.
What is the input common-mode voltage range of MAX9109EUT+T?
The input common-mode voltage range of MAX9109EUT+T extends from -0.2V to VCC–1.5V, allowing both inputs to operate 200mV below ground and up to 1.5V below the positive rail. This ground-inclusive range supports direct interfacing with ground-referenced transducers (e.g., thermistors, photodiodes) and AC-coupled signals without level-shifting circuitry. The MAX9109EUT+T maintains specified offset and hysteresis performance across this full range, unlike many comparators that degrade near rail extremes.
Can MAX9109EUT+T replace MAX909 in existing designs?
Yes, MAX9109EUT+T is a higher-speed, lower-power, lower-cost upgrade to MAX909, with identical 8-pin SO packaging available (MAX9109ESA+) and compatible pinout for that variant-but the MAX9109EUT+T itself uses a 6-pin SOT23-6 package with different pin mapping. While electrical behavior is improved (25ns vs. 100ns delay, 350µA vs. 1.2mA supply), direct replacement requires PCB layout revision due to package and pinout differences. The MAX9109EUT+T adds latch functionality absent in MAX909, offering new timing capabilities in upgraded designs.
MAX9109EUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- with Latch
- Number of Elements:
- 1
- Output Type:
- TTL
- Voltage - Supply, Single/Dual (±):
- 4.5V ~ 5.5V
- :
- 1.6mV @ 5V
- Voltage - Input Offset (Max):
- 0.125µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 700µA
- Current - Quiescent (Max):
- 86.02dB CMRR, 86.02dB PSRR
- CMRR, PSRR (Typ):
- 25ns
- Propagation Delay (Max):
- 2mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-6
MAX9109EUT+T FAQ
1.How can I place an order for MAX9109EUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9109EUT+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 MAX9109EUT+T reliable?
The price and inventory of MAX9109EUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9109EUT+T is usually 5 days.
3.What payment methods are accepted for MAX9109EUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9109EUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9109EUT+T?
MAX9109EUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9109EUT+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 MAX9109EUT+T?
For technical support, including MAX9109EUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9109EUT+T requirements.
6.How does Aetrix verify that MAX9109EUT+T is sourced from the original manufacturer or authorized distributors?
All MAX9109EUT+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 MAX9109EUT+T meets industry standards.
7.What is the process for return or replacement of MAX9109EUT+T?
All MAX9109EUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9109EUT+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 MAX9109EUT+T part is unused and in its original packaging.
Return procedure for MAX9109EUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX9109EUT+T Tags
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