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Analog Devices Inc./Maxim Integrated MAX9109ESA
- Part No.:
- MAX9109ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9109ESA.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,166
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Product details
Overview
The MAX9109ESA 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 +4.5V to +5.5V supply, featuring ±500µV offset voltage, 2mV internal hysteresis, and wide input common-mode range (–0.2V to VCC–1.5V), used in battery-powered infrared data receivers and precision threshold detection circuits.
For engineers reviewing the MAX9109ESA datasheet, MAX9109ESA pinout, MAX9109ESA application, or MAX9109ESA equivalent, this page delivers verified electrical specs, SO-8 package terminal mapping, latch timing behavior, TTL output drive capability, and real-world design context for fast, low-power analog-to-digital interface applications.
Technical Context
The MAX9109ESA implements a bipolar comparator core with fixed 2mV input-referred hysteresis to suppress oscillation during slow or noisy input transitions, eliminating need for external feedback resistors. Its latch enable (LE) pin controls transparent vs. latched output mode, with setup/hold times of 2ns each and TTL-compatible VIH/VIL thresholds (2.0V/0.8V).
It operates across –40°C to +85°C with guaranteed 25ns propagation delay (tPD+/tPD−) and <5ns skew between rising/falling edges, while drawing only 350µA per comparator (1.75mW at 5V), supporting clean switching into 10pF loads with 12ns rise/6ns fall times.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 25ns at 10mV input overdrive - enables precise timing in sampling circuits and zero-crossing detection. |
| Supply Current | 350µA per comparator at VCC = +5.5V - supports ultra-low-power operation in battery systems. |
| Input Offset Voltage | ±0.5mV typical (±4.0mV max) - ensures accurate threshold discrimination without calibration. |
| Input Common-Mode Range | –0.2V to VCC–1.5V - allows ground-referenced inputs and rail-to-rail signal monitoring. |
| Hysteresis | 2mV internal - prevents chatter on slow-moving signals without external components. |
| Output Type | TTL-compatible, no pull-up required - simplifies interface to microcontrollers and logic families. |
| Latch Enable | LE pin with 2ns setup/hold - captures comparison result synchronously for digital control systems. |
Pinout & Package
The MAX9109ESA is housed in an 8-pin SO (Small Outline) package (package code S8-2), RoHS-compliant, with 1.27mm lead pitch and standard JEDEC MS-012 outline.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No internal connection - must be left unconnected or tied to GND per layout best practice. |
| 2 | OUT | TTL-compatible output - drives logic-high ≥3.0V at 100µA source, logic-low ≤0.6V at 3.2mA sink. |
| 3 | GND | Analog/digital ground reference - requires low-inductance plane for stable high-speed operation. |
| 4 | LE | Latch enable input - high (≥2.0V) latches output; low (<0.8V) enables transparent mode. |
| 5 | VCC | Positive supply input - accepts 4.5V to 5.5V; decoupling capacitor must be placed adjacent. |
| 6 | IN+ | Noninverting input - accepts common-mode voltages down to –0.2V relative to GND. |
| 7 | IN− | Inverting input - matched to IN+ for precise differential threshold setting. |
| 8 | N.C. | No internal connection - electrically isolated; avoid routing signals or power near this pin. |
Key Features
| Feature | Design Value |
|---|---|
| 25ns propagation delay | Enables sub-40MHz sampling rates in A/D front-ends and high-speed line receivers. |
| Internal 2mV hysteresis | Eliminates external resistor network, reducing BOM count and PCB area in threshold detectors. |
| Latch function (MAX9109 only) | Allows synchronous capture of analog events by digital controllers without external flip-flops. |
| TTL-compatible outputs | Direct interface to 74LS/74HC logic and MCU GPIOs without level-shifting or pull-up resistors. |
| Single 4.5V–5.5V supply | Simplifies power architecture in 5V systems, including industrial PLC I/O modules and sensor nodes. |
Applications
| Battery-Powered Infrared Data Link | Threshold Detector / Discriminator |
|---|---|
|
Use Scenario: Low-power IR receiver in remote controls or optical sensors using photodiode + transimpedance amplifier. IC Role / Device Role / Timing Role: Comparator determines logic state of amplified photodiode signal; latch holds result for MCU readout. Use Value: Total circuit current <760µA enables multi-year coin-cell operation; 25ns response captures 1Mbps IR data. |
Use Scenario: Precision voltage threshold detection in industrial sensor interfaces or power-supply monitors. IC Role / Device Role / Timing Role: Compares sensor output against reference; internal hysteresis rejects noise-induced false triggers. Use Value: ±0.5mV offset and 2mV hysteresis ensure repeatable trip points across temperature without trimming. |
| A/D Converter Front-End | Zero-Crossing Detector |
|
Use Scenario: Fast comparator stage preceding SAR or flash ADCs to generate sample clocks or window flags. IC Role / Device Role / Timing Role: Provides clean, jitter-free strobe signal synchronized to analog input crossing defined levels. Use Value: 5ns propagation delay skew and 12ns/6ns rise/fall times minimize aperture uncertainty in sampling circuits. |
Use Scenario: AC line monitoring in energy meters or motor controllers detecting sine-wave polarity reversals. IC Role / Device Role / Timing Role: Detects when AC signal crosses 0V with minimal delay and immunity to EMI-induced glitches. Use Value: Wide input common-mode range (–0.2V) supports direct ground-referenced AC coupling; latch captures zero-cross event for timer capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM311DR | No internal latch; 200ns propagation delay; open-collector output requiring pull-up; higher 5.5mA supply current. | Lacks latch and speed for synchronous sampling; suited for general-purpose comparator use with external hysteresis. | Choose LM311DR only if latch functionality is unnecessary and cost is primary constraint. |
| TLV3501CDR | 3.5ns propagation delay; rail-to-rail inputs; CMOS output; 2.7–5.5V supply; no internal latch; 5.5mA supply current. | Higher speed but lacks latch and TTL compatibility; requires level translation for legacy 5V logic interfacing. | Choose TLV3501CDR when nanosecond timing dominates and latch is handled digitally. |
Compared with LM311DR and TLV3501CDR, the MAX9109ESA uniquely combines TTL output drive, integrated latch, 25ns speed, and sub-1mA quiescent current-making it optimal for space-constrained, battery-operated systems needing deterministic edge capture without external logic.
Availability
MAX9109ESA is available at Aetrix Electronics and suitable for battery-powered systems, A/D converter front-ends, and threshold detector designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for MAX9109ESA 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, and consumer applications.
The MAX9109ESA belongs to Maxim's high-speed comparator family targeting low-power, latch-enabled analog interface solutions for portable instrumentation, sensor signal conditioning, and real-time control systems.
FAQ
What is the maximum supply voltage rating for the MAX9109ESA?
The MAX9109ESA has an absolute maximum supply voltage of 6V (VCC to GND), but its guaranteed operating range is strictly 4.5V to 5.5V. Operation outside this range may cause parametric shift or reliability degradation. The MAX9109ESA is not rated for 3.3V-only systems and requires a stable 5V rail for specified performance.
Does the MAX9109ESA require external pull-up resistors on its output?
No, the MAX9109ESA features TTL-compatible push-pull outputs that actively drive both logic-high and logic-low states, eliminating 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 - fully compliant with standard TTL logic thresholds. This simplifies board layout and reduces component count in the MAX9109ESA design.
How does the internal latch in the MAX9109ESA function during operation?
The MAX9109ESA latch is controlled by the LE pin: when LE is low (<0.8V), the device operates transparently (output follows input instantly); when LE is high (≥2.0V), the current comparator state is captured and held until LE goes low again. Setup and hold times are both 2ns, enabling reliable synchronization with system clocks. This latch behavior is exclusive to the MAX9109ESA and not present in MAX9107/MAX9108 variants.
Can the MAX9109ESA operate with input voltages below ground?
Yes, the MAX9109ESA supports input common-mode voltages down to –0.2V (200mV below GND) with full functionality, as confirmed in its Electrical Characteristics table. This allows direct interfacing to ground-referenced AC signals or biased sensor outputs without level-shifting. However, absolute minimum input voltage is –0.3V - sustained operation below –0.2V risks increased offset drift or reduced hysteresis effectiveness in the MAX9109ESA.
What is the thermal derating coefficient for the MAX9109ESA in the SO-8 package?
The MAX9109ESA in the 8-pin SO package (S8-2) has a continuous power dissipation limit of 470mW at +70°C ambient, with a thermal derating coefficient of 5.9mW/°C above +70°C. This means usable power drops linearly - e.g., at +85°C ambient, max dissipation is 470mW – (15°C × 5.9mW/°C) = 381.5mW. This value is specific to the MAX9109ESA SO-8 variant and differs from SC70 or SOT23 versions.
MAX9109ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- 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
- :
- 8-SOIC
MAX9109ESA FAQ
1.How can I place an order for MAX9109ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9109ESA 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 MAX9109ESA reliable?
The price and inventory of MAX9109ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9109ESA is usually 5 days.
3.What payment methods are accepted for MAX9109ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9109ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9109ESA?
MAX9109ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9109ESA 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 MAX9109ESA?
For technical support, including MAX9109ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9109ESA requirements.
6.How does Aetrix verify that MAX9109ESA is sourced from the original manufacturer or authorized distributors?
All MAX9109ESA 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 MAX9109ESA meets industry standards.
7.What is the process for return or replacement of MAX9109ESA?
All MAX9109ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX9109ESA, 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 MAX9109ESA part is unused and in its original packaging.
Return procedure for MAX9109ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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