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Analog Devices Inc./Maxim Integrated MAX999EUK+T
- Part No.:
- MAX999EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX999EUK+T.pdf
- Description:
- IC COMPARATOR 1 GEN PUR SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:204
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Product details
Overview
The MAX999EUK+T from Maxim Integrated is a single ultra-high-speed comparator with internal hysteresis, optimized for +3V/+5V single-supply operation. It delivers 4.5ns propagation delay (5mV overdrive), 3.5mV input-referred hysteresis, and Beyond-the-Rails™ input range extending ±100mV beyond VCC/GND - enabling precise threshold detection in GPS receivers and high-speed sampling circuits.
For engineers reviewing the MAX999EUK+T datasheet, MAX999EUK+T pinout, MAX999EUK+T application, or MAX999EUK+T equivalent, key selection criteria include propagation delay vs. overdrive, rail-to-rail input capability, output drive strength (4mA sink/source to within 0.52V of rails), supply current (6.5mA typical at 5V), and SOT23-5 thermal performance (312.6mW at +70°C).
Technical Context
This comparator uses a current-driven output stage enabling fast slew rates and low static power after transition. Its input stage incorporates dual 200Ω resistors and front-to-back diode clamps to protect against differential overvoltage while maintaining 100mV Beyond-the-Rails common-mode range.
No shutdown or latch functionality is implemented in the MAX999EUK+T variant - unlike MAX961/MAX963/MAX997 - and it lacks complementary outputs or logic-enable inputs, confirming its role as a minimal-footprint, high-speed decision element without control logic overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 4.5ns typical at 5mV overdrive - enables sub-5ns timing decisions in high-speed data acquisition. |
| Supply Voltage Range | 2.7V to 5.5V - supports direct interface with 3.3V and 5V logic domains without level shifting. |
| Input Common-Mode Range | –0.1V to VCC + 0.1V - allows input signals to exceed supply rails by 100mV, critical for sensor interfacing. |
| Output Drive Strength | 4mA sink/source to within 0.52V of GND/VCC - eliminates need for external pull-ups in TTL/CMOS loads. |
| Supply Current | 6.5mA typical at VCC = 5V - balances speed and power for portable/battery-powered systems. |
| Input-Referred Hysteresis | 3.5mV fixed - prevents oscillation near trip points without external resistor networks. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive-adjacent embedded applications. |
Pinout & Package
MAX999EUK+T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5+2), with 1.6mm × 1.6mm footprint and 0.95mm height - optimized for space-constrained PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for all internal circuitry and output stage return path. |
| 2 | IN− | Inverting input terminal - accepts signals up to 100mV beyond GND or VCC. |
| 3 | IN+ | Noninverting input terminal - same rail-exceeding capability as IN−; differential pair input node. |
| 4 | VCC | Positive supply input - must be ≤5.5V; powers internal bias and output stage. |
| 5 | Q | TTL/CMOS-compatible open-drain–like output - sinks or sources 4mA, swings to within 0.52V of either rail. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast propagation | 4.5ns typical delay ensures timing-critical decisions in <5ns windows (e.g., clock recovery, pulse width discrimination). |
| Beyond-the-Rails input | ±100mV input range beyond supply rails enables direct connection to sensors or signals not referenced to system ground. |
| Internal hysteresis | 3.5mV fixed hysteresis eliminates need for external feedback resistors and prevents chatter near threshold crossings. |
| Rail-swing output | Output drives to within 0.52V of GND/VCC without external components - simplifies interface with 3.3V/5V logic families. |
| Low-voltage compatibility | Operates down to 2.7V supply - supports battery-powered designs with declining voltage profiles (e.g., Li-ion discharge). |
Applications
| GPS Receivers | High-Speed Sampling Circuits |
|---|---|
Use Scenario: Detecting zero-crossings and timing edges in L1-band RF baseband signals prior to ADC sampling. IC Role / Device Role / Timing Role: High-speed comparator generating clean digital timing strobes synchronized to analog signal transitions. Use Value: 4.5ns propagation delay and 3.5mV hysteresis ensure jitter-free edge detection even under low-SNR conditions. | Use Scenario: Converting analog sample-and-hold outputs into precise digital decision points for flash or pipeline ADC front-ends. IC Role / Device Role / Timing Role: Threshold comparator providing sub-5ns decision latency to maximize effective sampling rate. Use Value: Rail-to-rail input range accommodates full-scale ADC output swing; 4mA output drive directly clocks subsequent logic stages. |
| Portable/Battery-Powered Systems | Threshold Detectors/Discriminators |
Use Scenario: Monitoring battery voltage, temperature sensor outputs, or wake-up event triggers in handheld medical or IoT devices. IC Role / Device Role / Timing Role: Low-power, single-supply comparator detecting critical thresholds without external biasing. Use Value: 6.5mA supply current at 5V and 2.7V minimum operation extend battery life while maintaining nanosecond response. | Use Scenario: Identifying signal presence, amplitude thresholds, or fault conditions in industrial sensor interfaces or motor control feedback paths. IC Role / Device Role / Timing Role: Precision discriminator rejecting noise-induced false triggers via built-in hysteresis and rail-exceeding inputs. Use Value: 3.5mV hysteresis and ±100mV input range enable reliable detection of small-signal deviations in noisy environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH7220MK/NOPB | 4.5ns delay, but requires external hysteresis; no Beyond-the-Rails input (0V to VCC only); 5-pin SOT23 package. | Lacks rail-exceeding input capability - unsuitable for sensor signals referenced outside supply domain. | Select when hysteresis is programmable and input range is constrained to supply rails. |
| ADCMP600BRJZ-REEL7 | 4.5ns delay, 3.5mV hysteresis, rail-to-rail input (but not Beyond-the-Rails); 5-pin SOT23; 5.5mA supply current. | No ±100mV input extension - cannot accept signals below GND or above VCC without clamping risk. | Choose when strict rail-to-rail (not Beyond-the-Rails) operation suffices and footprint compatibility is required. |
Compared with LMH7220MK/NOPB and ADCMP600BRJZ-REEL7, the MAX999EUK+T uniquely combines guaranteed Beyond-the-Rails input range, fixed internal hysteresis, and sub-5ns delay in a 5-pin SOT23 - making it the only option among the three that supports true over-rail sensing without external components.
Availability
MAX999EUK+T is available at Aetrix Electronics and suitable for GPS receivers, high-speed sampling circuits, and portable/battery-powered systems requiring stable component supply across industrial temperature ranges.
Supply support for MAX999EUK+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 and mixed-signal ICs for industrial, communications, and consumer applications - emphasizing performance, integration, and reliability.
The MAX999EUK+T belongs to the MAX961–MAX964/MAX997/MAX999 family of ultra-high-speed comparators, engineered specifically for single-supply, low-voltage, high-precision threshold detection in timing-critical systems.
FAQ
What is the maximum supply voltage rating for the MAX999EUK+T?
The MAX999EUK+T has an absolute maximum supply voltage (VCC to GND) of +6V, but its operational range is specified from 2.7V to 5.5V. Operating above 5.5V risks violating electrical specifications and may cause permanent damage. The device is characterized and guaranteed across this 2.7V–5.5V window, with optimal performance at 3V and 5V nominal supplies. Always observe the 6V absolute max limit during transient conditions.
Does the MAX999EUK+T support shutdown mode?
No, the MAX999EUK+T does not include a shutdown function. Unlike the MAX961, MAX963, MAX964, or MAX997 variants - which feature a SHDN pin and reduce supply current to 270μA in shutdown - the MAX999EUK+T operates continuously at 6.5mA typical (5V). This reflects its design as a minimal-feature, high-speed comparator optimized for simplicity and speed rather than power gating.
What is the input offset voltage specification for the MAX999EUK+T?
The MAX999EUK+T has a typical input offset voltage (VOS) of ±1.5mV, with a maximum of ±4.5mV over the –40°C to +85°C temperature range. This value is measured at VCC = 5V with common-mode voltage at –0.1V or 5.1V. The low offset contributes directly to accurate threshold detection, especially when paired with its 3.5mV internal hysteresis to suppress noise-induced switching.
Can the MAX999EUK+T accept input signals below ground or above VCC?
Yes - the MAX999EUK+T supports a Beyond-the-Rails™ input common-mode range of –0.1V to VCC + 0.1V. This means either input (IN+ or IN−) can safely operate 100mV below GND or 100mV above VCC without causing false output inversion or damage, provided the other input remains within the valid range. This capability is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables.
Is the MAX999EUK+T pin-compatible with other comparators in the MAX961–MAX999 family?
No - the MAX999EUK+T is not pin-compatible with other members of the family. While it shares the 5-pin SOT23 package with no unused pins, its pinout (GND, IN−, IN+, VCC, Q) differs fundamentally from variants like the MAX961 (which includes SHDN and LE pins) or MAX997 (which adds SHDN). The MAX999EUK+T has no shutdown or latch-enable functionality, and its pin assignments are unique to this single-comparator, no-frills variant.
MAX999EUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- Beyond-the-Rails™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- CMOS, TTL
- Voltage - Supply, Single/Dual (±):
- 2.7V ~ 5.5V
- :
- 1.5mV @ 5V
- Voltage - Input Offset (Max):
- 15µA @ 5V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 7mA
- Current - Quiescent (Max):
- 80dB CMRR, 86.02dB PSRR
- CMRR, PSRR (Typ):
- 7ns
- Propagation Delay (Max):
- 3.5mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
MAX999EUK+T FAQ
1.How can I place an order for MAX999EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX999EUK+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 MAX999EUK+T reliable?
The price and inventory of MAX999EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX999EUK+T is usually 5 days.
3.What payment methods are accepted for MAX999EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX999EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX999EUK+T?
MAX999EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX999EUK+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 MAX999EUK+T?
For technical support, including MAX999EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX999EUK+T requirements.
6.How does Aetrix verify that MAX999EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX999EUK+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 MAX999EUK+T meets industry standards.
7.What is the process for return or replacement of MAX999EUK+T?
All MAX999EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX999EUK+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 MAX999EUK+T part is unused and in its original packaging.
Return procedure for MAX999EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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