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Analog Devices Inc./Maxim Integrated MAX9141EKA
- Part No.:
- MAX9141EKA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-8
- Datasheet:
-
MAX9141EKA.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:529
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Product details
Overview
The MAX9141EKA from Maxim Integrated is a single high-speed rail-to-rail input comparator with latch enable and shutdown functionality, optimized for 3V/5V systems. It delivers 40ns propagation delay, 150µA supply current per comparator, and 500µV typical offset voltage, enabling precise threshold detection in battery-powered instrumentation and portable line receivers.
For engineers reviewing the MAX9141EKA datasheet, MAX9141EKA pinout, MAX9141EKA application, or MAX9141EKA equivalent, key selection criteria include latch-controlled output capture, sub-1µA shutdown current, rail-to-rail input operation down to 2.7V, and compatibility with CMOS/TTL logic without external pullups.
Technical Context
The MAX9141EKA implements a bipolar process comparator core with internal 1.5mV hysteresis to suppress oscillation during slow input transitions, eliminating need for external feedback resistors. Its current-driven output stage delivers VOH = VCC − 0.3V and VOL = 0.3V at 4mA load, ensuring direct interface with both CMOS and TTL logic families.
Latch and shutdown functions are controlled via dedicated high-impedance digital inputs (LE and SHDN), each with VIH = VCC/2 + 0.4V and VIL = VCC/2 − 0.4V thresholds. Shutdown reduces supply current to 12µA while placing the output in high-impedance state, and latch operation supports data capture with 16ns setup/hold timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 40ns at 10mV overdrive - enables reliable sampling of >10MHz signals in timing-critical circuits |
| Supply Voltage Range | 2.7V to 5.5V - supports direct integration into 3V and 5V logic domains without level shifting |
| Input Offset Voltage | 4.5mV max over temperature - ensures stable trip-point accuracy across industrial temperature range |
| Rail-to-Rail Input Range | −0.2V to VCC + 0.2V - allows input signals beyond supply rails, critical for sensor interfacing and fault-tolerant designs |
| Output Swing | VOL = 0.3V / VOH = VCC − 0.3V at 4mA - guarantees full logic-level compatibility with 3.3V/5V CMOS and TTL loads |
| Shutdown Current | 12µA max at VCC = 3V - extends battery life in intermittent-sensing applications such as portable data loggers |
| Latch Propagation Delay | 60ns - defines minimum time between LE assertion and valid latched output for synchronous control systems |
Pinout & Package
MAX9141EKA is housed in an 8-pin SOT23 package (package code K8-5), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and standard JEDEC MO-178AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Comparator output | CMOS/TTL-compatible push-pull output; sinks 4mA / sources 4mA; swings within 300mV of either rail |
| 2 GND | Ground reference | Primary return path for supply and signal currents; must connect to low-impedance ground plane |
| 3 IN+ | Noninverting input | Rail-to-rail analog input node; accepts voltages from −0.2V to VCC + 0.2V; protected by internal diodes and 4.1kΩ series resistors |
| 4 IN− | Inverting input | Rail-to-rail analog input node; identical electrical characteristics and protection as IN+ |
| 5 VCC | Positive supply | Single 2.7V–5.5V supply input; requires local 0.1µF ceramic decoupling capacitor placed adjacent to pin |
| 6 LE | Latch enable | Digital control input; high = transparent mode, low = latch mode; VIH/VIL thresholds referenced to VCC/2 ± 0.4V |
| 7 SHDN | Shutdown control | Digital control input; high = active mode, low = shutdown mode; draws <1µA when asserted |
| 8 N.C. | No connection | Not internally bonded; must remain unconnected on PCB; no routing or copper fill allowed |
Key Features
| Feature | Design Value |
|---|---|
| Internal 1.5mV hysteresis | Eliminates external resistor network for noise immunity, enabling clean switching even with slow-moving or noisy inputs |
| Latch function with 16ns setup/hold | Supports synchronous sampling in digital control loops without external D-flip-flop or timing margin overhead |
| Shutdown mode with 12µA quiescent current | Reduces system power by >92% versus active mode, ideal for duty-cycled sensor monitoring |
| Rail-to-rail input common-mode range | Accepts inputs beyond supply rails (±0.2V), simplifying interface to transducers and op-amp outputs |
| CMOS/TTL-compatible output stage | Drives standard logic loads directly-no pull-up resistors required-reducing BOM count and board area |
Applications
| Line Receivers | Battery-Powered Systems |
|---|---|
Use Scenario: Receiving differential or single-ended signals over coaxial or twisted-pair lines in industrial communication nodes. IC Role / Device Role / Timing Role: High-speed comparator acting as zero-crossing detector and signal edge extractor with latch synchronization. Use Value: 40ns propagation delay ensures accurate recovery of >10MHz clock/data edges; rail-to-rail input handles degraded signal amplitudes near supply limits. | Use Scenario: Threshold monitoring of battery voltage, temperature, or sensor outputs in handheld medical devices and IoT sensors. IC Role / Device Role / Timing Role: Low-power comparator performing periodic wake-up and alert generation under microcontroller supervision. Use Value: 12µA shutdown current extends shelf life; 2.7V operation supports Li-ion battery discharge down to 2.8V without brownout. |
| Threshold Detectors/Discriminators | Zero-Crossing Detectors |
Use Scenario: Precision voltage-level detection in programmable logic controllers and analog front-end protection circuits. IC Role / Device Role / Timing Role: Comparator with fixed internal hysteresis serving as overvoltage/undervoltage lockout trigger. Use Value: 4.5mV max offset and 1.5mV hysteresis ensure repeatable trip points across −40°C to +85°C; latch holds alarm state until cleared. | Use Scenario: AC line synchronization in switched-mode power supplies and motor phase commutation timing. IC Role / Device Role / Timing Role: Rail-to-rail comparator detecting sine-wave zero crossings with minimal phase error. Use Value: Input common-mode range extending below GND allows direct AC coupling; 40ns delay minimizes timing jitter in 50/60Hz and higher-frequency systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-power comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV7215M5X | 35ns propagation delay, 120µA supply current, no latch or shutdown; 5-pin SOT23 only | Lacks digital control features; suitable only for always-on, space-constrained threshold detection | Select when latch/shutdown are unnecessary and board area is premium; verify input range compatibility (0V to VCC only) |
| TLV3501CDBVR | 4.5ns propagation delay, 5.2mA supply current, rail-to-rail input, no latch/shutdown; 5-pin SOT23 | Higher speed but 35× higher power; no digital control; not drop-in due to different pinout and supply sensitivity | Choose only for ultra-fast response where power budget permits; requires redesign for biasing and layout |
Compared with LMV7215M5X and TLV3501CDBVR, the MAX9141EKA uniquely integrates latch and shutdown in an 8-pin SOT23 while maintaining 40ns speed and 150µA active current-enabling synchronized, low-power sensing without external logic or power gating circuitry.
Availability
MAX9141EKA is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial line receivers, and precision threshold detectors requiring stable component supply and long-term lifecycle support.
Supply support for MAX9141EKA 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) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, communications, and consumer applications.
The MAX9140/MAX9141 family was designed specifically for low-power, high-speed comparator applications in portable and 3V/5V systems, emphasizing rail-to-rail operation, integrated hysteresis, and digital control features.
FAQ
What is the maximum operating supply voltage for the MAX9141EKA?
The MAX9141EKA has an absolute maximum supply voltage rating of +6V, but its specified operating range is 2.7V to 5.5V. Operation above 5.5V risks permanent damage, while operation below 2.7V may cause unreliable latch or shutdown behavior. The MAX9141EKA achieves optimal propagation delay and offset performance between 3.0V and 5.0V.
Does the MAX9141EKA require external pull-up resistors on its output?
No, the MAX9141EKA does not require external pull-up resistors. Its CMOS/TTL-compatible push-pull output stage actively drives high to VCC − 0.3V and low to 0.3V at 4mA load, ensuring full logic-level compliance with both 3.3V and 5V systems without additional components. This eliminates BOM cost and board space associated with discrete pull-ups.
How does the internal hysteresis of the MAX9141EKA improve system reliability?
The MAX9141EKA incorporates a fixed 1.5mV input-referred hysteresis that creates distinct upper and lower trip points, preventing output oscillation during slow or noisy input transitions. This eliminates the need for external positive feedback networks and ensures deterministic switching in applications like zero-crossing detection and threshold monitoring where input slew rates are low or EMI is present.
Can the MAX9141EKA operate with input voltages below ground or above VCC?
Yes, the MAX9141EKA supports a rail-to-rail input common-mode range from −0.2V to VCC + 0.2V, allowing inputs to extend 200mV beyond either supply rail without damage or false output inversion. This capability is enabled by internal protection diodes and series resistors, making the MAX9141EKA suitable for interfacing with op-amps, transducers, and legacy analog signals that exceed supply boundaries.
What happens to the output of the MAX9141EKA during shutdown mode?
When the SHDN pin is driven low, the MAX9141EKA enters shutdown mode: supply current drops to ≤12µA, and the output enters a high-impedance (three-state) condition. The output remains floating-neither driven high nor low-so external pull-up/down resistors or system-level handling is required to define its state during shutdown. The MAX9141EKA resumes normal operation within 1µs after SHDN is returned high.
MAX9141EKA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-8
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Push-Pull, CMOS, TTL, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 2mV @ 5V
- Voltage - Input Offset (Max):
- 0.32µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 320µA
- Current - Quiescent (Max):
- 38.06dB CMRR, 82dB PSRR
- CMRR, PSRR (Typ):
- 40ns (Typ)
- Propagation Delay (Max):
- 1.5mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-8
MAX9141EKA FAQ
1.How can I place an order for MAX9141EKA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9141EKA 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 MAX9141EKA reliable?
The price and inventory of MAX9141EKA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9141EKA is usually 5 days.
3.What payment methods are accepted for MAX9141EKA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9141EKA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9141EKA?
MAX9141EKA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9141EKA 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 MAX9141EKA?
For technical support, including MAX9141EKA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9141EKA requirements.
6.How does Aetrix verify that MAX9141EKA is sourced from the original manufacturer or authorized distributors?
All MAX9141EKA 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 MAX9141EKA meets industry standards.
7.What is the process for return or replacement of MAX9141EKA?
All MAX9141EKA units undergo pre-shipment inspection (PSI). If there is an issue with MAX9141EKA, 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 MAX9141EKA part is unused and in its original packaging.
Return procedure for MAX9141EKA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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