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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:4,131
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Product details
Overview
The MAX9109EUT-T from Maxim Integrated is a single, high-speed, low-power TTL-compatible voltage comparator with internal latch and 25ns propagation delay (10mV overdrive), operating from a single +5V supply (4.5V–5.5V) and consuming only 350µA per comparator. It features 500µV typical offset voltage, 2mV internal hysteresis, and wide input common-mode range (–0.2V to VCC–1.5V), making it suitable for precision threshold detection in battery-powered infrared data links.
For engineers reviewing the MAX9109EUT-T datasheet, MAX9109EUT-T pinout, MAX9109EUT-T application, or MAX9109EUT-T equivalent, this device is selected for fast, low-power analog-to-digital interface functions where latch-enabled sampling, ground-inclusive input range, and TTL-level output drive without pull-ups are required.
Technical Context
The MAX9109EUT-T implements a bipolar comparator core with fixed 2mV internal hysteresis to suppress oscillation during slow input transitions, eliminating external feedback resistors. Its latch enable (LE) input controls transparent vs. latched operation: LE low enables real-time comparison; LE high captures and holds the output state.
Designed for single-supply systems, it accepts inputs down to –0.2V (200mV below ground) and up to VCC–1.5V, with TTL-compatible outputs (VOH ≥ 3.0V at 100µA, VOL ≤ 0.6V at 3.2mA) and guaranteed operation from –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 25ns at 10mV input overdrive - enables sub-40MHz sampling rate in threshold detection circuits. |
| Supply Current | 350µA per comparator at VCC = +5.5V - supports ultra-low-power battery operation (e.g., <1mA total system current). |
| Input Offset Voltage | Typical 500µV (max 4mV over temp) - ensures accurate trip-point stability in precision discriminators. |
| Input Common-Mode Range | –0.2V to VCC–1.5V - allows direct sensing of signals referenced to ground or negative offsets without level-shifting. |
| Hysteresis | 2mV input-referred - provides noise immunity against EMI/RFI in noisy industrial or portable environments. |
| Latch Enable Threshold | VIL ≤ 0.8V, VIH ≥ 2.0V - compatible with standard TTL/CMOS logic control signals. |
| Output Drive | TTL-compatible: VOH ≥ 3.0V (100µA), VOL ≤ 0.6V (3.2mA) - directly interfaces with 74LS/74HC logic without external pull-ups. |
Pinout & Package
MAX9109EUT-T is packaged in a 6-pin SOT23-6 (package code U6-1), footprint-compatible with industry-standard 6-lead SOT-23 layouts and optimized for space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply input (4.5V–5.5V); requires local 0.1µF ceramic decoupling placed adjacent to pin. |
| 2 | OUT | TTL-compatible open-collector–like output; sinks up to 8mA, sources weakly via internal pull-up structure. |
| 3 | IN+ | Noninverting input; accepts voltages from –0.2V to VCC–1.5V; high-impedance (bias current <350nA). |
| 4 | IN− | Inverting input; same voltage range and impedance as IN+; differential input voltage limited to ±(VCC+0.3V). |
| 5 | LE | Latch enable: low = transparent mode, high = latched output; TTL-level compatible with 0.8V/2.0V thresholds. |
| 6 | GND | Analog/digital ground reference; must connect to low-inductance ground plane for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| 25ns propagation delay with 10mV overdrive | Enables real-time response in 40MHz-class signal monitoring without timing budget compromise. |
| Internal 2mV hysteresis | Eliminates need for external positive feedback resistors, reducing BOM count and layout sensitivity. |
| Latch-enable functionality | Allows synchronous capture of transient events (e.g., pulse edges) using external clock or control signal on LE. |
| TTL-compatible outputs | Direct interface to legacy and modern logic families without external pull-up resistors or level translators. |
| Ground-inclusive input range (–0.2V) | Supports direct connection to sensors or transducers with negative swing (e.g., photodiode amps, AC-coupled signals). |
Applications
| Battery-Powered Infrared Data Link | Threshold Detector for A/D Converter Interface |
|---|---|
|
Use Scenario: Low-current IR receiver front-end where photodiode current is converted to voltage and compared against a reference. IC Role / Device Role / Timing Role: Precision comparator latching valid "1" pulses; operates at <760µA total system current with MAX4400 amplifier. Use Value: Enables multi-year battery life in remote controls or sensor nodes while maintaining reliable digital edge detection. |
Use Scenario: Analog signal conditioning stage before successive-approximation ADC sampling. IC Role / Device Role / Timing Role: Fast, low-offset comparator generating clean digital strobes to trigger ADC conversion start. Use Value: Reduces aperture uncertainty and sampling jitter due to 25ns delay and sub-mV hysteresis. |
| Zero-Crossing Detector in Power Monitoring | Line Receiver for Industrial Serial Interface |
|
Use Scenario: AC mains voltage monitoring for energy metering or phase synchronization. IC Role / Device Role / Timing Role: Detects precise zero-crossing points of transformer-coupled line signals with ground-referenced input capability. Use Value: Achieves <1µs timing accuracy across –40°C to +85°C using internal hysteresis and rail-to-rail input range. |
Use Scenario: RS-422/RS-485 receiver front-end converting differential bus signals to single-ended TTL levels. IC Role / Device Role / Timing Role: High-speed comparator reconstructing digital data from noisy industrial communication lines. Use Value: Maintains signal integrity at >10Mbps rates with 25ns delay and robust noise rejection via 2mV hysteresis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV7215M5X | No internal latch; 45ns propagation delay; rail-to-rail input; 1.8V–5.5V supply; CMOS process. | Lacks latch function; better for low-voltage systems but slower and unsuitable for synchronous sampling. | Select when latch is unnecessary and supply voltage may drop below 4.5V. |
| TLV3501DBVR | 2.5ns propagation delay; no internal hysteresis; no latch; 2.7V–5.5V supply; requires external hysteresis network. | Higher speed but demands careful layout and external components for noise immunity; not drop-in. | Select for ultra-high-speed (>300MHz) overdrive conditions where latch and integrated hysteresis are secondary. |
Compared with LMV7215M5X and TLV3501DBVR, the MAX9109EUT-T uniquely combines latch functionality, 25ns speed, integrated 2mV hysteresis, and true ground-sensing capability in a 6-pin SOT23 - making it optimal for space-constrained, battery-operated sampling systems requiring deterministic event capture.
Availability
MAX9109EUT-T is available at Aetrix Electronics and suitable for battery-powered infrared data links, A/D converter timing interfaces, zero-crossing detectors, and industrial line receivers requiring stable component supply and long-term production continuity.
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, mixed-signal, and power-management ICs for industrial, communications, computing, and consumer applications.
The MAX9109EUT-T belongs to Maxim's high-speed comparator product line, engineered specifically for low-power, single-supply systems demanding fast, latch-enabled threshold detection with minimal external components.
FAQ
What is the operating supply voltage range for the MAX9109EUT-T?
The MAX9109EUT-T operates from a single supply of 4.5V to 5.5V, with full performance guaranteed across this range. It is not rated for operation below 4.5V or above 5.5V under normal conditions, and absolute maximum supply is 6V. The MAX9109EUT-T draws only 350µA at VCC = +5.5V, enabling efficient use in regulated 5V systems or battery-backed designs.
Does the MAX9109EUT-T require external pull-up resistors on its output?
No, the MAX9109EUT-T features TTL-compatible outputs that actively drive high (≥3.0V at 100µA) and low (≤0.6V at 3.2mA), eliminating the need for external pull-up resistors. This simplifies board layout and reduces component count, especially in dense or low-power designs. The MAX9109EUT-T output structure is optimized for direct interfacing with 74LS, 74HC, and other standard logic families.
How does the internal latch in the MAX9109EUT-T function?
The MAX9109EUT-T's latch is controlled by the LE pin: when LE is low, the device operates transparently (output follows input instantly); when LE goes high, the current comparator state is captured and held until LE returns low. Setup and hold times are both 2ns, supporting high-speed synchronous sampling. This latch functionality is exclusive to the MAX9109EUT-T within the MAX9107/08/09 family.
What is the input common-mode voltage range of the MAX9109EUT-T?
The MAX9109EUT-T accepts input voltages from –0.2V (200mV below ground) to VCC–1.5V, enabling direct interface with ground-referenced or slightly negative signals - such as those from photodiode transimpedance amplifiers or AC-coupled sensors. This eliminates level-shifting circuitry and preserves signal fidelity in precision threshold detection applications using the MAX9109EUT-T.
Is the MAX9109EUT-T pin-compatible with other comparators in the MAX9107/08/09 family?
No - the MAX9109EUT-T uses a 6-pin SOT23-6 package with dedicated LE, OUT, IN+, IN−, VCC, and GND pins, whereas the dual MAX9107 uses 8-pin SOT23/SO and the quad MAX9108 uses 14-pin TSSOP/SO. Pin counts, functions, and footprints differ across the family; the MAX9109EUT-T is not pin-compatible with MAX9107EKA+T or MAX9108EUD+, and requires its own layout.
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:
- Obsolete
- 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.
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