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Analog Devices Inc./Maxim Integrated MAX9109ESA-T
- Part No.:
- MAX9109ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9109ESA-T.pdf
- Description:
- IC COMPARATOR 1 W/LATCH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
The MAX9109ESA-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 +4.5V to +5.5V supply with input common-mode range from –0.2V to VCC–1.5V. It delivers 350µA per comparator (1.75mW), 500µV typical offset voltage, and 2mV internal hysteresis for clean switching in battery-powered threshold detection circuits.
For engineers reviewing the MAX9109ESA-T datasheet, MAX9109ESA-T pinout, MAX9109ESA-T application, or MAX9109ESA-T equivalent, this device is selected for precision, low-power, latch-enabled analog-to-digital interface functions where fast response, ground-sensing capability, and TTL-level output drive without pullups are required.
Technical Context
The MAX9109ESA-T implements a bipolar comparator core with fixed 2mV input-referred hysteresis to suppress oscillation during slow input transitions, eliminating external feedback resistors. Its latch enable (LE) pin controls transparent vs. latched output behavior, with setup/hold times of 2ns each and TTL-compatible VIH/VIL thresholds of 2.0V/0.8V.
Designed for single-supply operation, it supports rail-to-rail input voltage swing down to 200mV below ground and up to 1.5V below VCC, while maintaining guaranteed performance across –40°C to +85°C. Output rise/fall times are 12ns/6ns into 10pF, and propagation delay skew is ≤5ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 25ns at 10mV input overdrive - enables sampling of >30MHz signals with deterministic timing |
| Supply Current | 350µA per comparator (1.75mW @ 5V) - supports multi-year battery life in portable sensors |
| Input Offset Voltage | 0.5–4.0mV (max) - ensures accurate threshold detection within ±2mV window |
| Input Common-Mode Range | –0.2V to VCC–1.5V - allows direct sensing of signals referenced to ground or negative rails |
| Hysteresis | 2mV internal - eliminates need for external positive feedback components in noise-prone environments |
| Latch Enable Function | LE pin controls transparent/latched mode with 2ns setup/hold - enables synchronous capture of transient events |
| Output Compatibility | TTL-compatible VOH ≥3.0V / VOL ≤0.6V @ 3.2mA - drives standard logic without external pullups |
Pinout & Package
MAX9109ESA-T is housed in an 8-pin SO (Small Outline) package (package code S8-2), with exposed pad not present and RoHS-compliant finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No internal connection - must be left unconnected or tied to GND for mechanical stability |
| 2 | OUT | TTL-compatible output - sinks up to 8mA or sources 100µA; no pullup required |
| 3 | GND | Analog/digital ground reference - requires low-inductance PCB plane for high-speed stability |
| 4 | LE | Latch Enable input - high = latch output state; low = transparent comparator operation |
| 5 | VCC | Positive supply (4.5V–5.5V) - requires local 0.1µF ceramic decoupling capacitor |
| 6 | IN+ | Noninverting input - accepts voltages from –0.2V to VCC–1.5V |
| 7 | IN– | Inverting input - same common-mode range as IN+; differential input voltage limited to ±0.3V |
| 8 | N.C. | No internal connection - must be left unconnected or tied to GND |
Key Features
| Feature | Design Value |
|---|---|
| 25ns propagation delay | Enables real-time detection of fast transients in A/D front-ends and zero-crossing circuits |
| Internal 2mV hysteresis | Prevents chatter on slow-moving inputs without external resistor networks or layout overhead |
| Latch-enable functionality | Allows edge-triggered capture of comparator decisions synchronized to system clock or control signals |
| TTL-compatible outputs | Direct interface to 74LS/74HC logic families without level-shifting or pullup resistors |
| Ground-sensing input range | Supports direct monitoring of signals at or below ground potential (e.g., current-sense shunts) |
Applications
| Battery-Powered Threshold Detection | A/D Converter Interface |
|---|---|
|
Use Scenario: Monitoring battery voltage against low-voltage cutoff threshold in portable medical devices. IC Role / Device Role / Timing Role: Single comparator acting as precision undervoltage lockout (UVLO) with latch hold to prevent false resets during transient dips. Use Value: 350µA quiescent current extends battery life; 2mV hysteresis prevents oscillation near trip point; latch holds fault state until MCU reset. |
Use Scenario: Converting analog sensor output to digital logic level before feeding to successive-approximation ADC sample-and-hold stage. IC Role / Device Role / Timing Role: High-speed comparator providing clean, jitter-free clocked decision signal to ADC control logic. Use Value: 25ns delay ensures synchronization with 30+ MHz sampling clocks; TTL output directly drives ADC enable without buffering. |
| Line Receiver for Digital Signals | Zero-Crossing Detector |
|
Use Scenario: Recovering TTL-level data from noisy industrial RS-422/RS-485 differential receivers with degraded common-mode rejection. IC Role / Device Role / Timing Role: Single-ended comparator reconstructing logic states from amplified differential receiver output. Use Value: Wide input common-mode range (–0.2V to VCC–1.5V) accommodates residual offsets; internal hysteresis rejects line noise up to 2mV peak. |
Use Scenario: Detecting AC waveform zero crossings in motor phase-control or power-factor correction circuits. IC Role / Device Role / Timing Role: Ground-referenced comparator comparing AC signal to 0V reference with precise trip point control. Use Value: Input range extending 200mV below ground enables reliable detection even with small negative excursions; 500µV offset minimizes timing error. |
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 pullup; higher 5.5mA supply current | Suitable for general-purpose comparator use but lacks latch and speed for sampled-data systems | Choose LM311DR only when latch function is unnecessary and board space allows pullup resistor placement |
| TLV3501CDR | 3.5ns propagation delay; rail-to-rail input; CMOS output; no internal hysteresis; 2.9mA supply current | Better for ultra-high-speed applications but requires external hysteresis network and level translation for TTL loads | Choose TLV3501CDR when sub-10ns response is mandatory and system design accommodates external feedback components |
Compared with LM311DR and TLV3501CDR, the MAX9109ESA-T uniquely combines latch functionality, 25ns speed, TTL compatibility, and ultra-low 350µA supply current in a single SO-8 package-making it optimal for space-constrained, battery-operated systems requiring deterministic event capture without external components.
Availability
MAX9109ESA-T is available at Aetrix Electronics and suitable for battery-powered systems, A/D converter interfaces, line receivers, and threshold detectors requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for MAX9109ESA-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, medical, communications, and consumer applications.
The MAX9109ESA-T belongs to Maxim's high-speed comparator product line, engineered specifically for low-power, latch-enabled signal conditioning in portable and embedded systems where speed, accuracy, and supply efficiency are jointly critical.
FAQ
What is the maximum operating supply voltage for the MAX9109ESA-T?
The MAX9109ESA-T is rated for absolute maximum supply voltage of 6V, but its guaranteed operational range is 4.5V to 5.5V per the Electrical Characteristics table. Operation outside 4.5V–5.5V may cause undefined behavior or reduced parameter guarantees. The MAX9109ESA-T must be powered within this window to ensure specified propagation delay, offset voltage, and latch timing.
Does the MAX9109ESA-T require external pullup resistors on its output?
No, the MAX9109ESA-T features TTL-compatible push-pull outputs capable of sourcing 100µA and sinking up to 8mA, eliminating the need for external pullup resistors. This simplifies PCB layout and reduces component count. The MAX9109ESA-T output meets standard TTL VOH/VOL specifications across temperature and supply voltage, ensuring direct interoperability with legacy logic families.
How does the internal latch in the MAX9109ESA-T function?
The MAX9109ESA-T latch is controlled by the LE pin: when LE is low, the output follows the comparator decision in real time (transparent mode); when LE goes high, the current output state is captured and held regardless of subsequent input changes. Setup and hold times are both 2ns, enabling synchronization with fast digital control signals. This behavior is intrinsic to the MAX9109ESA-T and does not require external clocking circuitry.
Can the MAX9109ESA-T accept input voltages below ground?
Yes, the MAX9109ESA-T supports an input common-mode range extending 200mV below ground (–0.2V), allowing direct interfacing with signals referenced to negative potentials-such as current-sense amplifier outputs or AC-coupled sensor signals. This capability is explicitly guaranteed in the datasheet and applies to both IN+ and IN– pins of the MAX9109ESA-T under normal operating conditions.
What package type is used for the MAX9109ESA-T?
The MAX9109ESA-T uses an 8-pin SO (Small Outline) package with package code S8-2, measuring 4.9mm × 6.0mm × 1.75mm. It is RoHS-compliant, surface-mountable, and compatible with standard reflow profiles. This package provides thermal and electrical performance suitable for industrial temperature operation (–40°C to +85°C) and is distinct from the SC70-6 and SOT23-6 variants of the MAX9109 family.
MAX9109ESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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
- :
- 8-SOIC
MAX9109ESA-T FAQ
1.How can I place an order for MAX9109ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9109ESA-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 MAX9109ESA-T reliable?
The price and inventory of MAX9109ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9109ESA-T is usually 5 days.
3.What payment methods are accepted for MAX9109ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9109ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9109ESA-T?
MAX9109ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9109ESA-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 MAX9109ESA-T?
For technical support, including MAX9109ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9109ESA-T requirements.
6.How does Aetrix verify that MAX9109ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX9109ESA-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 MAX9109ESA-T meets industry standards.
7.What is the process for return or replacement of MAX9109ESA-T?
All MAX9109ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9109ESA-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 MAX9109ESA-T part is unused and in its original packaging.
Return procedure for MAX9109ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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