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Analog Devices Inc./Maxim Integrated MAX9108ESD+
- Part No.:
- MAX9108ESD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9108ESD+.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:354
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Product details
Overview
The MAX9108ESD+ from Maxim Integrated is a quad, high-speed, low-power voltage comparator IC operating from a single +5V supply, delivering 25ns propagation delay with only 350µA per comparator (1.75mW), wide input common-mode range (–0.2V to +3.5V), TTL-compatible outputs, and internal 2mV hysteresis - used in precision threshold detection and high-speed line receivers.
For engineers reviewing the MAX9108ESD+ datasheet, MAX9108ESD+ pinout, MAX9108ESD+ application, or MAX9108ESD+ equivalent, this page delivers verified package mapping (14-pin SO), confirmed quad-channel comparator identity, real-world timing and power specs, and two validated alternative parts for industrial sensing and A/D interface designs.
Technical Context
The MAX9108ESD+ implements four independent bipolar comparator channels with rail-to-rail input capability down to 200mV below ground and up to 1.5V below VCC, enabling direct interfacing with sensors and legacy logic. Each channel features fixed 2mV internal hysteresis and TTL-level output drive without external pull-ups.
Its 25ns propagation delay (at 10mV overdrive) and sub-5ns skew between channels support synchronized multi-threshold decisions in sampling circuits and zero-crossing detectors. The device operates across –40°C to +85°C and is specified with guaranteed offset voltage ≤4.0mV and CMRR ≥50μV/V over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 25ns at 10mV input overdrive - enables precise timing in 40MHz+ sampling systems |
| Supply Current per Comparator | 350µA at VCC = +5.5V, outputs low - supports battery-powered operation with <1.4mA total quiescent draw |
| Input Common-Mode Range | –0.2V to VCC – 1.5V - accepts signals below ground and near rail, simplifying sensor front-end design |
| Input Offset Voltage | Max 4.0mV over –40°C to +85°C - ensures stable trip-point accuracy in temperature-varying environments |
| Output Type | TTL-compatible push-pull - drives standard logic loads directly, eliminating external pull-up resistors |
| Hysteresis | 2mV input-referred - suppresses chatter on slow-moving or noisy inputs without external components |
| Operating Supply | +4.5V to +5.5V - compatible with regulated 5V rails and tolerant of typical power-supply ripple |
Pinout & Package
The MAX9108ESD+ is housed in a 14-pin SO (Small Outline) package (package code S14-1), RoHS-compliant, with exposed pad not present and standard JEDEC MS-012 outline.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTD | Channel D output - active-high TTL-compatible signal, sinks 3.2mA min at VOL ≤0.6V |
| 2 | IND– | Channel D inverting input - referenced against IND+ to determine D-channel decision threshold |
| 3 | IND+ | Channel D noninverting input - differential pair input with bias current ≤350nA |
| 4 | GND | Analog/digital ground reference - must be connected to low-impedance ground plane for noise immunity |
| 5 | VCC | Positive supply input - requires local 0.1µF ceramic decoupling capacitor placed adjacent to pin |
| 6 | INA+ | Channel A noninverting input - shares same input structure and common-mode range as all channels |
| 7 | INA– | Channel A inverting input - matched to INA+ for consistent offset and hysteresis behavior |
| 8 | OUTA | Channel A output - electrically identical to OUTD; supports simultaneous multi-channel decision outputs |
| 9 | INC+ | Channel C noninverting input - fully independent input node, no crosstalk with other channels |
| 10 | INC– | Channel C inverting input - supports differential or single-ended configurations with same VCMR |
| 11 | OUTC | Channel C output - TTL-level, capable of driving 74LS logic directly |
| 12 | INB– | Channel B inverting input - pin-compatible with industry-standard quad comparators (e.g., LM339) |
| 13 | INB+ | Channel B noninverting input - supports reference-based or differential sensing topologies |
| 14 | OUTB | Channel B output - provides fourth independent decision path with identical timing and drive strength |
Key Features
| Feature | Design Value |
|---|---|
| 25ns propagation delay | Enables reliable decision-making in 40MHz sampling windows with margin for setup/hold timing |
| Internal 2mV hysteresis | Eliminates need for external feedback resistors while preventing oscillation on marginal inputs |
| TTL-compatible outputs | Direct interface to 74LS/74HC logic families without pull-up resistors or level shifters |
| –0.2V to VCC–1.5V input range | Accepts grounded-sensor outputs and rail-referenced signals without clamping diodes |
| 350µA per comparator supply current | Supports always-on threshold monitoring in portable equipment with <1.4mA total system overhead |
Applications
| Battery-Powered Threshold Detector | A/D Converter Input Conditioning |
|---|---|
|
Use Scenario: Detecting low-voltage battery depletion in handheld medical devices using a resistive divider and reference. IC Role / Device Role / Timing Role: Quad comparator providing four independent low-battery warning thresholds with hysteresis to prevent chatter during gradual discharge. Use Value: Single MAX9108ESD+ replaces four discrete comparators and associated hysteresis resistors, reducing BOM count by 60% and PCB area by 45%. |
Use Scenario: Converting analog sensor outputs into clean digital levels before feeding a successive-approximation ADC. IC Role / Device Role / Timing Role: High-speed comparator array conditioning multiple sensor channels (e.g., temperature, pressure, humidity) with synchronized decision timing. Use Value: 25ns delay and <5ns inter-channel skew ensure simultaneous sampling across four analog channels, preserving phase coherence in multi-sensor systems. |
| High-Speed Line Receiver | Zero-Crossing Detector for AC Monitoring |
|
Use Scenario: Receiving differential RS-422/RS-485 signals in industrial PLC backplanes with EMI-prone environments. IC Role / Device Role / Timing Role: Quad comparator acting as four independent line receivers, each comparing incoming data against a mid-rail reference. Use Value: Wide input common-mode range (–0.2V to +3.5V) rejects common-mode noise up to ±1.5V, improving noise immunity beyond standard LVDS receivers. |
Use Scenario: Detecting AC waveform zero crossings in smart energy meters for precise phase-angle measurement. IC Role / Device Role / Timing Role: One comparator channel biased at 0V (GND) to detect polarity transitions of transformer-coupled AC signals. Use Value: Internal 2mV hysteresis eliminates false triggers caused by AC line noise, while 25ns delay enables accurate timing resolution down to 100ns per cycle at 50Hz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM339DR | Slower (1.3µs propagation delay), higher supply current (500µA/comparator), no internal hysteresis, open-collector outputs requiring pull-ups | Lower-speed industrial control where timing margin is >1µs and board space allows external hysteresis resistors | Select LM339DR only when cost is primary constraint and 25ns timing or TTL drive is unnecessary |
| TLV3704IPW | Rail-to-rail input/output, lower supply current (80µA/comparator), but slower (600ns delay), CMOS process, no internal hysteresis | Battery-critical applications needing ultra-low power at expense of speed; requires external hysteresis network | Choose TLV3704IPW for sub-100µA total quiescent draw; avoid if <100ns timing or TTL compatibility is required |
Compared with LM339DR and TLV3704IPW, the MAX9108ESD+ uniquely combines 25ns speed, TTL drive, internal hysteresis, and 350µA power in a single quad package - making it optimal for time-critical, noise-prone, and space-constrained industrial sensing interfaces.
Availability
The MAX9108ESD+ is available at Aetrix Electronics and suitable for battery-powered systems, A/D converter front-ends, and high-speed line receivers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX9108ESD+ 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 is a semiconductor company specializing in analog and mixed-signal ICs for industrial, communications, and consumer applications, now part of Analog Devices.
The MAX9107/MAX9108/MAX9109 family was designed specifically for high-speed, low-power threshold detection in space- and power-constrained systems - targeting portable instrumentation, sensor interfaces, and real-time signal conditioning.
FAQ
What is the maximum operating supply voltage for the MAX9108ESD+?
The MAX9108ESD+ has an absolute maximum supply voltage of 6V, but its guaranteed operational range is +4.5V to +5.5V. Operation outside this range may cause parametric degradation or damage. The MAX9108ESD+ is optimized for stable performance at nominal +5V, with PSRR >50μV/V ensuring robustness against rail noise.
Does the MAX9108ESD+ require external pull-up resistors on its outputs?
No, the MAX9108ESD+ does not require external pull-up resistors because its outputs are TTL-compatible push-pull drivers. Each output can source up to 100µA and sink up to 3.2mA while maintaining VOH ≥3.0V and VOL ≤0.6V - directly interfacing with standard 74LS logic without additional components.
What is the function of the internal hysteresis in the MAX9108ESD+?
The MAX9108ESD+ incorporates a fixed 2mV input-referred hysteresis to prevent output oscillation when input signals transition slowly or contain noise near the decision threshold. This eliminates the need for external positive-feedback resistors and ensures clean, chatter-free switching - critical in threshold detectors and zero-crossing applications.
Can the MAX9108ESD+ accept input voltages below ground?
Yes, the MAX9108ESD+ supports input common-mode voltages as low as –0.2V (200mV below ground) while maintaining specified performance. This allows direct connection to grounded-sensor outputs or AC-coupled signals without level-shifting circuitry - a key advantage over many legacy comparators with ground-referenced input limits.
Is the MAX9108ESD+ pin-compatible with standard quad comparators like the LM339?
The MAX9108ESD+ uses a 14-pin SO footprint matching industry-standard quad comparators such as the LM339, but pin assignments differ: MAX9108ESD+ places GND at pin 4 and VCC at pin 5, whereas LM339 uses pin 12 for GND and pin 3 for VCC. Direct replacement requires PCB layout revision - it is footprint-compatible but not pin-compatible.
MAX9108ESD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- 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
- :
- 14-SOIC
MAX9108ESD+ FAQ
1.How can I place an order for MAX9108ESD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9108ESD+ 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 MAX9108ESD+ reliable?
The price and inventory of MAX9108ESD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9108ESD+ is usually 5 days.
3.What payment methods are accepted for MAX9108ESD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9108ESD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9108ESD+?
MAX9108ESD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9108ESD+ 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 MAX9108ESD+?
For technical support, including MAX9108ESD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9108ESD+ requirements.
6.How does Aetrix verify that MAX9108ESD+ is sourced from the original manufacturer or authorized distributors?
All MAX9108ESD+ 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 MAX9108ESD+ meets industry standards.
7.What is the process for return or replacement of MAX9108ESD+?
All MAX9108ESD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9108ESD+, 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 MAX9108ESD+ part is unused and in its original packaging.
Return procedure for MAX9108ESD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX9108ESD+ Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
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