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Analog Devices Inc./Maxim Integrated MAX9109EXT-T
- Part No.:
- MAX9109EXT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MAX9109EXT-T.pdf
- Description:
- IC COMPARATOR 1 W/LATCH SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,255
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Product details
Overview
The MAX9109EXT-T from Maxim Integrated is a single, high-speed, low-power TTL-compatible voltage comparator with internal latch and 25ns propagation delay at 10mV overdrive, operating from a single +5V supply (4.5V to 5.5V), featuring 500µV typical offset voltage, 2mV internal hysteresis, and SC70-6 packaging for space-constrained battery-powered detection circuits.
For engineers reviewing the MAX9109EXT-T datasheet, MAX9109EXT-T pinout, MAX9109EXT-T application, or MAX9109EXT-T equivalent, this device serves as a latch-enabled, single-channel comparator optimized for threshold detection in low-power A/D interfaces, infrared data receivers, and zero-crossing circuits where fast response, ground-sensing input range, and latch-hold functionality are required.
Technical Context
The MAX9109EXT-T implements a bipolar comparator core with fixed 2mV input-referred hysteresis to suppress oscillation during slow input transitions, eliminating external feedback components. Its latch enable (LE) input controls transparent vs. latched output behavior, with setup/hold times of 2ns each and TTL-compatible logic thresholds (VIH = 2.0V, VIL = 0.8V).
Input common-mode range spans –0.2V to (VCC – 1.5V), enabling direct ground-referenced sensing; output stages drive TTL loads without pull-ups, delivering VOH ≥ 3.0V at 100µA and VOL ≤ 0.6V at 3.2mA, with rise/fall times of 12ns/6ns into 10pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 25ns at 10mV input overdrive - enables precise timing in sampling and edge-detection circuits. |
| Supply Current per Comparator | 350µA (1.75mW at 5V) - supports ultra-low-power operation in battery systems. |
| Input Offset Voltage | 0.5–4.0mV (max) - ensures accurate threshold setting across temperature (–40°C to +85°C). |
| Input Common-Mode Range | –0.2V to VCC – 1.5V - allows direct interface with ground-referenced sensors and analog signals. |
| Hysteresis | 2mV - provides noise immunity without external resistors, stabilizing output during slow-moving inputs. |
| Latch Enable Function | LE pin controls transparent/latched mode with 2ns setup/hold - enables synchronous capture of comparison results. |
| Output Compatibility | TTL logic levels (VOH ≥ 3.0V, VOL ≤ 0.6V) - directly interfaces with standard digital logic without level-shifting. |
Pinout & Package
The MAX9109EXT-T is housed in a 6-pin SC70 package (X6S-1 outline), measuring 2.0mm × 1.25mm × 0.9mm, optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply input (4.5V to 5.5V); requires local 0.1µF ceramic decoupling. |
| 2 | IN+ | Noninverting input; accepts signals down to –0.2V for ground-referenced threshold detection. |
| 3 | IN− | Inverting input; differential pair input node with 125–350nA bias current. |
| 4 | LE | Latch enable: low = transparent, high = latches output state; TTL-compatible thresholds. |
| 5 | GND | Analog/digital ground reference; must connect to low-inductance ground plane. |
| 6 | OUT | TTL-compatible output; drives 3.2mA sink load with VOL ≤ 0.6V; no external pull-up needed. |
Key Features
| Feature | Design Value |
|---|---|
| 25ns propagation delay with 10mV overdrive | Enables sub-40MHz sampling decision timing in real-time signal conditioning paths. |
| Internal 2mV hysteresis | Eliminates need for external positive feedback resistors while ensuring clean switching on noisy inputs. |
| Latch-enable input (LE) | Allows synchronous capture of comparator result for interfacing with clocked digital systems. |
| Ground-sensing input range (–0.2V to VCC – 1.5V) | Supports direct connection to single-ended sensors and legacy analog sources without level-shifting. |
| TTL-compatible outputs | Drives standard logic families directly, reducing BOM count and layout complexity. |
Applications
| Battery-Powered Infrared Data Link | A/D Converter Input Conditioning |
|---|---|
Use Scenario: Low-power IR receiver detecting modulated photodiode signals in remote controls or sensor nodes. IC Role / Device Role / Timing Role: Threshold detector comparing amplified photodiode output against reference to decode digital '1'/'0' bits. Use Value: 350µA quiescent current and 25ns response enable >100-hour operation on coin-cell batteries while maintaining 1Mbps data integrity. | Use Scenario: Front-end signal conditioning before successive-approximation ADC sampling. IC Role / Device Role / Timing Role: Fast comparator generating precise sample-ready strobes synchronized to analog input crossing defined thresholds. Use Value: 2mV hysteresis prevents false triggering near decision boundaries, improving effective resolution and reducing digital post-processing overhead. |
| Zero-Crossing Detector | Line Receiver for Industrial Bus |
Use Scenario: AC mains monitoring for phase-controlled dimmers or motor commutation timing. IC Role / Device Role / Timing Role: Single-supply comparator detecting polarity reversal of transformer-coupled line voltage. Use Value: –0.2V to VCC – 1.5V input range allows direct sensing of bipolar AC waveforms referenced to system ground without coupling capacitors. | Use Scenario: RS-422/RS-485 receiver front-end converting differential bus signals to single-ended TTL logic. IC Role / Device Role / Timing Role: High-speed comparator translating differential line states into clean digital logic levels for microcontroller input. Use Value: 25ns propagation delay and 1ns differential skew ensure accurate recovery of high-speed serial data with minimal jitter accumulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV7215M5X/NOPB | 35ns propagation delay, rail-to-rail input, no latch, 650nA supply current | Lacks latch function; wider input range but slower response and higher power | Select when latch is unnecessary and rail-to-rail input swing is critical. |
| TLV3201DBVR | 40ns propagation delay, 40µA supply current, no latch, open-drain output | Ultra-low power but requires external pull-up; no internal hysteresis or latch | Select for micropower wake-up detection where latch and speed are secondary. |
Compared with LMV7215M5X/NOPB and TLV3201DBVR, the MAX9109EXT-T uniquely combines 25ns speed, integrated latch, TTL output drive, and 2mV hysteresis in a 6-pin SC70 package-making it optimal for time-critical, space-constrained, latched threshold detection where deterministic timing and noise immunity are essential.
Availability
MAX9109EXT-T is available at Aetrix Electronics and suitable for battery-powered systems, A/D converter interfaces, line receivers, and threshold discriminators requiring stable component supply and long-term industrial availability.
Supply support for MAX9109EXT-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, communications, and consumer applications, emphasizing performance, integration, and reliability.
The MAX9107/MAX9108/MAX9109 family delivers high-speed, low-power, latch-capable comparators targeting compact, battery-efficient detection and timing functions in portable instrumentation and sensor interfaces.
FAQ
What is the operating supply voltage range for the MAX9109EXT-T?
The MAX9109EXT-T operates from a single supply of 4.5V to 5.5V, with guaranteed performance across the full –40°C to +85°C temperature range. It draws only 350µA per comparator at 5.5V, making it ideal for +5V systems where power efficiency and stability are critical. The MAX9109EXT-T maintains TTL-compatible output levels and 25ns propagation delay within this voltage window.
Does the MAX9109EXT-T require external pull-up resistors on its output?
No, the MAX9109EXT-T features TTL-compatible push-pull outputs that actively drive both high and low states, eliminating the need for external pull-up resistors. Its VOH is ≥3.0V at 100µA source current and VOL is ≤0.6V at 3.2mA sink current, ensuring direct compatibility with standard 5V logic families. This simplifies PCB layout and reduces component count compared to open-drain comparators.
How does the internal latch in the MAX9109EXT-T function?
The MAX9109EXT-T's latch enable (LE) pin controls output behavior: when LE is low, the comparator operates transparently; when LE goes high, the current output state is captured and held until LE returns low. Setup and hold times are both 2ns, supporting synchronization with system clocks up to ~500MHz. This latch function is exclusive to the MAX9109EXT-T within the MAX9107/08/09 family and is not present in the dual or quad variants.
What is the input common-mode voltage range of the MAX9109EXT-T?
The MAX9109EXT-T accepts input voltages from –0.2V to (VCC – 1.5V), enabling true ground-referenced operation and compatibility with signals that swing below ground-such as transformer-coupled AC waveforms or photodiode preamp outputs. This wide range eliminates the need for level-shifting circuitry in many sensor interface applications and is confirmed across the full –40°C to +85°C operating temperature range.
Can the MAX9109EXT-T be used in place of the MAX909?
Yes, the MAX9109EXT-T is explicitly positioned as a higher-speed, lower-power, lower-cost upgrade to the industry-standard MAX909 comparator. It improves propagation delay (25ns vs. 50ns), reduces supply current (350µA vs. 1.2mA), adds internal hysteresis (2mV), and integrates a latch-while maintaining pin compatibility in the 8-pin SO package. However, the MAX9109EXT-T in SC70-6 (X6S-1) is not pin-compatible with the MAX909's 8-pin DIP/SO; board redesign is required for the smaller footprint.
MAX9109EXT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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
- :
- SC-70-6
MAX9109EXT-T FAQ
1.How can I place an order for MAX9109EXT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9109EXT-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 MAX9109EXT-T reliable?
The price and inventory of MAX9109EXT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9109EXT-T is usually 5 days.
3.What payment methods are accepted for MAX9109EXT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9109EXT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9109EXT-T?
MAX9109EXT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9109EXT-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 MAX9109EXT-T?
For technical support, including MAX9109EXT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9109EXT-T requirements.
6.How does Aetrix verify that MAX9109EXT-T is sourced from the original manufacturer or authorized distributors?
All MAX9109EXT-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 MAX9109EXT-T meets industry standards.
7.What is the process for return or replacement of MAX9109EXT-T?
All MAX9109EXT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9109EXT-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 MAX9109EXT-T part is unused and in its original packaging.
Return procedure for MAX9109EXT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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