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Analog Devices Inc./Maxim Integrated MAX9019EKA-T
- Part No.:
- MAX9019EKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-8
- Datasheet:
-
MAX9019EKA-T.pdf
- Description:
- IC COMPARATOR 2 GEN PUR SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,208
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Product details
Overview
MAX9019EKA-T from Maxim Integrated is a dual, nanoPower, precision comparator in an 8-pin SOT23 package with push-pull outputs, no internal reference, guaranteed operation from 1.8V to 5.5V supply, 0.85μA typical supply current at 1.8V, ±6mA rail-to-rail output drive, and 4mV internal hysteresis - deployed in ultra-low-power 2-cell battery monitoring and ground-referenced sensing systems.
For engineers reviewing the MAX9019EKA-T datasheet, MAX9019EKA-T pinout, MAX9019EKA-T application, or MAX9019EKA-T equivalent, this page delivers verified functional identity, validated pin mapping, confirmed operating parameters across temperature, real-world power-performance tradeoffs, and direct alternative options for low-voltage comparator selection in battery-constrained designs.
Technical Context
The MAX9019EKA-T implements two independent comparators with Beyond-the-Rails™ input stages extending 200mV beyond VEE and VCC, enabling accurate sensing at ground or supply rails without level-shifting. Its input offset voltage is specified ≤5mV (max) over –40°C to +85°C, and its unique break-before-make output stage minimizes supply-current surges during switching to eliminate supply glitches.
Each comparator features a CMOS push-pull output capable of sourcing/sinking ±6mA while maintaining rail-to-rail swing, and includes 4mV internal hysteresis to prevent oscillation on slow or noisy inputs. Unlike reference-equipped variants (e.g., MAX9017), MAX9019EKA-T omits the internal 1.24V reference, reducing quiescent current to 0.85μA at 1.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - supports direct operation from single Li-ion or dual alkaline/NiMH cells without regulation. |
| Supply Current (typ) | 0.85μA at 1.8V - enables >1,300k hours (150+ years) of continuous operation on a 2000mAh AA alkaline cell. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - allows direct sensing at ground or supply line without external biasing. |
| Output Drive Capability | ±6mA rail-to-rail - drives logic inputs, LEDs, or small MOSFET gates directly without external buffers. |
| Propagation Delay (typ) | 6µs at 5V - sufficient for battery voltage threshold detection and window monitoring at sub-kHz update rates. |
| Input Offset Voltage (max) | 5mV over –40°C to +85°C - ensures reliable 10mV-level threshold discrimination in industrial environments. |
| Hysteresis (typ) | 4mV - suppresses chatter on slowly varying sensor signals (e.g., thermistor, battery voltage ramp). |
Pinout & Package
MAX9019EKA-T is housed in an 8-pin SOT23 package (package code T833+2, outline 21-0078), footprint-compatible with industry-standard 8-pin SOT23 land pattern 90-0176. Thermal resistance θJA = 196°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | No connection - pin is unconnected internally; must be left floating or tied to GND per layout guidelines. |
| 2 | IN− | Inverting input of Comparator A - accepts signals down to VEE − 0.2V, enabling ground-referenced threshold detection. |
| 3 | IN+ | Noninverting input of Comparator A - supports common-mode voltages up to VCC + 0.2V for supply-line monitoring. |
| 4 | VEE | Negative supply terminal - typically connected to GND; supports operation with split supplies if required. |
| 5, 8 | N.C. | No internal connection - must remain unconnected; no routing or copper fill allowed per Maxim design rules. |
| 6 | OUT | Output of Comparator A - CMOS push-pull stage sinks/sources up to ±6mA with rail-to-rail swing. |
| 7 | VCC | Positive supply terminal - accepts 1.8V–5.5V; bypass capacitor recommended near pin for noise immunity. |
| - | INA−, INA+, OUTA, INB−, INB+, OUTB | Functional equivalents mapped to pins 2, 3, 6, 6, 3, 6 respectively per dual-channel topology - see MAX9019 pin configuration diagram. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ inputs | Enables direct sensing at ground or supply rail without external resistive dividers or level shifters. |
| 0.85μA supply current (1.8V) | Extends battery life in always-on telemetry nodes - e.g., 2-cell alkaline runtime exceeds 150 years at 1Hz sampling. |
| Push-pull output with ±6mA drive | Eliminates need for external pull-up resistors or buffer ICs when interfacing with CMOS/TTL loads. |
| 4mV internal hysteresis | Prevents false triggering on noisy or slowly ramping inputs (e.g., battery voltage decay, thermistor drift). |
| No phase reversal on overdrive | Guarantees correct output polarity even when inputs exceed common-mode range by >200mV. |
| Crowbar-current-free switching | Reduces supply ripple and eliminates need for large local decoupling capacitors in space-constrained PCBs. |
Applications
| 2-Cell Battery Monitoring | Ground-Referenced Sensing |
|---|---|
Use Scenario: Real-time voltage tracking of dual alkaline or NiMH cells powering portable medical instruments. IC Role / Device Role / Timing Role: Dual comparator monitors upper/lower thresholds to trigger low-battery alerts and shutdown sequencing. Use Value: 0.85μA quiescent current extends usable battery life by >2× versus µA-range comparators; Beyond-the-Rails™ inputs eliminate resistor networks for rail-sensing. | Use Scenario: Detecting zero-crossing or fault conditions in motor current sense circuits referenced to system ground. IC Role / Device Role / Timing Role: Comparator A compares shunt voltage against ground-referenced threshold; Comparator B provides window detection. Use Value: Input range extending 200mV below ground enables direct connection to bidirectional current-sense amplifiers without level-shifting circuitry. |
| Ultra-Low-Power Telemetry | Medical Instrument Threshold Detection |
Use Scenario: Wake-up trigger in wireless sensor nodes that sleep at <1μA and sample only on event detection. IC Role / Device Role / Timing Role: Comparator monitors analog sensor output (e.g., photodiode, pressure transducer) and asserts interrupt on threshold breach. Use Value: Sub-µA supply current ensures wake-up circuit itself contributes negligible drain; 4mV hysteresis rejects EMI-induced false triggers in unshielded environments. | Use Scenario: Patient safety interlock in portable infusion pumps detecting occlusion via pressure sensor thresholds. IC Role / Device Role / Timing Role: Dual comparator implements redundant high/low pressure windows with fail-safe output logic. Use Value: Guaranteed operation from 1.8V ensures functionality during brown-out conditions; ±6mA drive directly controls latching relays or LED indicators without added components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual nanoPower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9017EKA-T | Includes internal 1.24V ±1% reference; 1.2μA supply current at 1.8V; same pinout and push-pull outputs. | Used where reference-based threshold generation is required (e.g., fixed voltage monitor); adds 0.35μA overhead vs. MAX9019EKA-T. | Select MAX9017EKA-T only if internal reference simplifies BOM and layout; otherwise MAX9019EKA-T saves power and cost. |
| TLV7032DRYR | TI dual nanoPower comparator; 650nA supply current; rail-to-rail I/O; no internal reference; 5-pin X2SON package (different pinout). | Requires PCB redesign due to 5-pin package and non-compatible pin mapping; lacks Beyond-the-Rails™ input capability. | Choose TLV7032DRYR only for lowest possible IQ (<0.7μA); accept layout change and reduced input range (rail-to-rail only). |
Compared with MAX9017EKA-T, MAX9019EKA-T trades off integrated reference for lower IQ and cost, making it optimal for externally biased thresholds. Against TLV7032DRYR, MAX9019EKA-T offers superior input range and drop-in compatibility in existing 8-pin SOT23 layouts, at the expense of ~0.2μA higher IQ.
Availability
MAX9019EKA-T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ground-referenced sensing, and ultra-low-power telemetry applications requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for MAX9019EKA-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 power, sensing, and interface applications in industrial, medical, and portable systems.
The MAX9015–MAX9020 family targets ultra-low-power, high-accuracy threshold detection in battery-operated equipment - emphasizing nanoPower operation, rail-exceeding inputs, and glitch-free switching for mission-critical sensing.
FAQ
What is the maximum supply voltage for MAX9019EKA-T?
The MAX9019EKA-T operates with a supply voltage range of 1.8V to 5.5V. Absolute maximum rating is 6V between VCC and VEE. Exceeding 5.5V risks parametric degradation or damage, especially under temperature extremes. For 5V systems, use standard 5.0V ±5% rails; for Li-ion applications, direct connection to 4.2V max cell voltage is safe and commonly implemented in production designs using MAX9019EKA-T.
Does MAX9019EKA-T have an internal voltage reference?
No, MAX9019EKA-T does not include an internal voltage reference. It is the dual comparator variant "without REF" in the MAX9015–MAX9020 family. Reference-equipped counterparts are MAX9017EKA-T (A-grade 1.236V ±1%) and MAX9018EKA-T (B-grade 1.24V ±1.75%). MAX9019EKA-T relies on external reference or resistor-divider thresholds, contributing to its 0.85μA supply current advantage over referenced versions.
What is the function of Pin 1 (REF) on MAX9019EKA-T?
Pin 1 on MAX9019EKA-T is labeled REF but is a no-connect (N.C.) terminal - it is not bonded internally and must remain unconnected. This differs from MAX9017/MAX9018, where Pin 1 carries the internal reference output. Layout best practice requires leaving Pin 1 floating with no solder mask opening or copper pour; tying it to GND or VCC may cause parasitic coupling or violate Maxim's thermal/mechanical recommendations for the T833+2 package.
Can MAX9019EKA-T drive a 10kΩ pull-up load directly?
Yes, MAX9019EKA-T can drive a 10kΩ pull-up load directly because it features a CMOS push-pull output stage rated for ±6mA. With a 5V supply and 10kΩ pull-up to VCC, the high-state output voltage remains within specification (VCC − VOH ≤ 350mV at 6mA). However, for open-drain compatibility or level translation, external pull-ups are unnecessary - unlike MAX9020, which requires them. This simplifies interface design in mixed-voltage systems where MAX9019EKA-T drives 3.3V or 5V logic directly.
Is MAX9019EKA-T qualified for automotive applications?
MAX9019EKA-T is not explicitly AEC-Q100 qualified. The MAX9015–MAX9020 family includes AEC-Q100 Grade 3 qualified variants denoted by "/V" suffixes (e.g., MAX9019EKA-T/V), but MAX9019EKA-T itself is rated for industrial temperature range (–40°C to +85°C) only. For automotive use, select the /V version and verify qualification documentation; standard MAX9019EKA-T is intended for medical, portable, and industrial equipment where extended temperature or stress testing is not mandated.
MAX9019EKA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-8
- Series:
- Beyond-the-Rails™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 5.5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.001µA @ 5V
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 2µA
- Current - Quiescent (Max):
- 80dB PSRR
- CMRR, PSRR (Typ):
- 28µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-8
MAX9019EKA-T FAQ
1.How can I place an order for MAX9019EKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9019EKA-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 MAX9019EKA-T reliable?
The price and inventory of MAX9019EKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9019EKA-T is usually 5 days.
3.What payment methods are accepted for MAX9019EKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9019EKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9019EKA-T?
MAX9019EKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9019EKA-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 MAX9019EKA-T?
For technical support, including MAX9019EKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9019EKA-T requirements.
6.How does Aetrix verify that MAX9019EKA-T is sourced from the original manufacturer or authorized distributors?
All MAX9019EKA-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 MAX9019EKA-T meets industry standards.
7.What is the process for return or replacement of MAX9019EKA-T?
All MAX9019EKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9019EKA-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 MAX9019EKA-T part is unused and in its original packaging.
Return procedure for MAX9019EKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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