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Analog Devices Inc./Maxim Integrated MAX9141EKA+T
- Part No.:
- MAX9141EKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-8
- Datasheet:
-
MAX9141EKA+T.pdf
- Description:
- IC COMPARATOR 1 W/LATCH SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,843
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Product details
Overview
MAX9141EKA+T from Analog Devices is a single high-speed rail-to-rail input comparator with latch enable (LE) and shutdown (SHDN) functions, optimized for 3V/5V systems. It delivers 40ns propagation delay, 150μA supply current per comparator at 3V, and 500μV typical offset voltage. It operates across –40°C to +85°C and interfaces directly with CMOS/TTL logic in battery-powered threshold detection applications.
For engineers reviewing the MAX9141EKA+T datasheet, MAX9141EKA+T pinout, MAX9141EKA+T application, or MAX9141EKA+T equivalent, key selection criteria include latch-controlled sampling timing, shutdown current reduction to 12μA, rail-to-rail input range beyond supply rails, and compatibility with low-voltage portable designs requiring clean switching without external hysteresis.
Technical Context
The MAX9141EKA+T implements a bipolar-input comparator core with fixed 1.5mV internal hysteresis to suppress oscillation during slow input transitions. Its output stage drives within 300mV of VCC or GND without pull-up resistors, enabling direct CMOS/TTL interfacing.
Latch operation is controlled by the LE pin: transparent when high, latched when low (with 16ns setup/hold and 60ns latch propagation delay). Shutdown is activated via SHDN pin low, reducing ICC to ≤30μA and placing output in high-impedance state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 40ns at 10mV overdrive - enables precise timing in high-speed sampling circuits. |
| Supply Current | 150μA per comparator at 3V - supports ultra-low-power operation in battery-powered systems. |
| Input Offset Voltage | 0.5–2.0mV (typical 0.5mV at +25°C) - ensures accurate threshold detection with minimal error. |
| Rail-to-Rail Input Range | –0.2V to VCC + 0.2V - allows signal monitoring beyond supply rails, e.g., in sensor front-ends. |
| Output Swing | VOL = 0.3V / VOH = VCC – 0.3V at 4mA - guarantees robust logic-level compatibility with 3V/5V CMOS/TTL. |
| Shutdown Current | ≤30μA (12μA typical) - extends battery life during idle periods without external power gating. |
| Operating Temperature | –40°C to +85°C (E grade) - validated for industrial and automotive cabin environments. |
Pinout & Package
MAX9141EKA+T is housed in an 8-pin SOT23 package (package code K8-5), with 1.27mm pitch, 2.9mm × 1.6mm footprint, and RoHS-compliant lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | N.C. | No internal connection - must be left floating or tied to GND per layout best practice. |
| 2 | OUT | CMOS/TTL-compatible open-drain–like output - sinks or sources current to rail, no external pull-up needed. |
| 3 | GND | Analog/digital ground reference - requires low-inductance connection to PCB ground plane. |
| 4 | LE | Latch enable input - high = transparent mode, low = latched output; high-impedance CMOS input. |
| 5 | SHDN | Shutdown control - high = active, low = shutdown (ICC ≤30μA, output high-Z). |
| 6 | IN– | Inverting input - accepts rail-to-rail common-mode signals; protected against ±20mA continuous fault current. |
| 7 | IN+ | Noninverting input - identical protection and common-mode range as IN–; differential input tolerance up to ±2VF. |
| 8 | VCC | Positive supply - supports 2.7V to 5.5V operation; requires local 0.1μF ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Internal 1.5mV hysteresis | Eliminates need for external feedback resistors while ensuring noise-immune switching on slow-moving inputs. |
| Latch function (LE pin) | Enables synchronous sampling capture with 16ns setup/hold timing - critical for ADC trigger alignment. |
| Shutdown mode (SHDN pin) | Reduces quiescent current to <30μA and disables output drive - ideal for duty-cycled sensor monitoring. |
| Rail-to-rail input range | Accepts inputs from –0.2V to VCC + 0.2V - supports direct connection to transducers or op-amp outputs beyond rails. |
| CMOS/TTL-compatible output | Drives to within 0.3V of VCC/GND at 4mA - interoperable with mixed-voltage logic without level shifters. |
Applications
| Battery-Powered Threshold Detector | Line Receiver Interface |
|---|---|
|
Use Scenario: Detecting low-voltage battery depletion (e.g., 2.8V cutoff) in portable medical devices with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Comparator monitors battery voltage against precision reference; latch holds result until microcontroller reads it. Use Value: 150μA supply current and shutdown mode extend battery life; rail-to-rail input accommodates full battery discharge curve. |
Use Scenario: Converting noisy coaxial line signals (e.g., RS-422/485 stubs) into clean digital logic for FPGA input. IC Role / Device Role / Timing Role: High-speed comparator slices analog line voltage with 40ns response; hysteresis rejects EMI-induced jitter. Use Value: 1.5mV internal hysteresis and 40ns delay ensure reliable edge detection without external components. |
| Zero-Crossing Detector | 3V/5V System Level-Shifter |
|
Use Scenario: Identifying AC waveform zero crossings in smart energy metering for phase-aligned sampling. IC Role / Device Role / Timing Role: Compares AC signal (centered at VCC/2) to ground reference; latch captures crossing instant for timer capture. Use Value: Input common-mode range extending below GND (–0.2V) enables direct AC coupling without bias networks. |
Use Scenario: Translating 5V logic edges to 3V domain in mixed-supply microcontroller peripherals. IC Role / Device Role / Timing Role: Comparator acts as unidirectional level shifter using 5V input and 3V VCC; output swings 0.3V above/below 3V rails. Use Value: Eliminates discrete MOSFET translators; rail-to-rail input accepts full 5V swing while output meets 3V logic thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9140EUK+T | Single comparator, no LE or SHDN pins; 5-pin SOT23; same 40ns delay and 150μA ICC. | Lacks latch/shutdown - suitable only for always-on, non-synchronized detection. | Select when latch timing control or power gating is unnecessary and board space is constrained. |
| TLV3501IDBVR | 4.5ns propagation delay, 2.7–5.5V supply, no internal hysteresis, no latch/shutdown; 6-pin SOT23. | Requires external hysteresis resistors; higher speed but higher ICC (5.3mA); no power management features. | Choose for sub-5ns timing-critical applications where ultra-low delay outweighs power and integration trade-offs. |
Compared with MAX9140EUK+T, MAX9141EKA+T adds latch and shutdown for synchronized sampling and power savings; compared with TLV3501IDBVR, it trades raw speed for integrated hysteresis, lower ICC, and system-level control features - making it optimal for portable, battery-sensitive, and timing-coordinated designs.
Availability
MAX9141EKA+T is available at Aetrix Electronics and suitable for battery-powered systems, line receiver interfaces, and zero-crossing detectors requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX9141EKA+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX914x family was designed specifically for low-power, high-speed signal conditioning in portable and mixed-voltage systems - emphasizing rail-to-rail operation, integrated hysteresis, and power management features like shutdown and latch.
FAQ
What is the maximum supply voltage rating for MAX9141EKA+T?
The absolute maximum supply voltage (VCC to GND) for MAX9141EKA+T is +6V. However, its specified operating range is 2.7V to 5.5V. Exceeding 5.5V may cause permanent damage or parametric degradation, and operation above 6V violates absolute maximum ratings per the datasheet.
Does MAX9141EKA+T require external pull-up resistors on its output?
No, MAX9141EKA+T does not require external pull-up resistors. Its output stage actively drives to within 0.3V of VCC or GND at 4mA load, providing full CMOS/TTL-compatible logic levels without external components - a key design advantage over open-drain comparators.
How does the latch function operate in MAX9141EKA+T?
In MAX9141EKA+T, the latch is controlled by the LE pin: when LE is high, the comparator output is transparent (real-time); when LE is pulled low, the current output state is held. Data-to-latch setup time is 16ns, and latch pulse width must exceed 45ns for reliable capture.
What happens to the output during shutdown mode of MAX9141EKA+T?
When SHDN is driven low, MAX9141EKA+T enters shutdown mode: supply current drops to ≤30μA, and the output enters a high-impedance (three-state) condition. The output remains indeterminate unless LE is high during exit - ensuring predictable behavior upon wake-up.
Is MAX9141EKA+T compatible with inputs below ground (negative voltages)?
Yes, MAX9141EKA+T supports input voltages down to –0.2V relative to GND (per VCMR specification), and its absolute maximum rating allows –0.3V. This enables direct interface with AC-coupled or bipolar sensor signals without level-shifting circuitry.
MAX9141EKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-8
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- with Latch
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, TTL
- 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):
- 81.94dB CMRR, 81.94dB PSRR
- CMRR, PSRR (Typ):
- 40ns
- Propagation Delay (Max):
- 1.5mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-8
MAX9141EKA+T FAQ
1.How can I place an order for MAX9141EKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9141EKA+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 MAX9141EKA+T reliable?
The price and inventory of MAX9141EKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9141EKA+T is usually 5 days.
3.What payment methods are accepted for MAX9141EKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9141EKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9141EKA+T?
MAX9141EKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9141EKA+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 MAX9141EKA+T?
For technical support, including MAX9141EKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9141EKA+T requirements.
6.How does Aetrix verify that MAX9141EKA+T is sourced from the original manufacturer or authorized distributors?
All MAX9141EKA+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 MAX9141EKA+T meets industry standards.
7.What is the process for return or replacement of MAX9141EKA+T?
All MAX9141EKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9141EKA+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 MAX9141EKA+T part is unused and in its original packaging.
Return procedure for MAX9141EKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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