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MAX9042BEUA+
Analog Devices Inc./Maxim Integrated
IC COMPARATOR 2 W/VOLT REF 8UMAX
2373 Pcs New Original In Stock
Comparator with Voltage Reference CMOS, Push-Pull, Rail-to-Rail, TTL 8-uMAX/uSOP
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5.0 / 5.0
- (421 Ratings)
MAX9042BEUA+
Product Overview
6680255
DiGi Electronics Part Number
MAX9042BEUA+-DGManufacturer
Analog Devices Inc./Maxim Integrated
MAX9042BEUA+
Description
IC COMPARATOR 2 W/VOLT REF 8UMAXInventory
2373 Pcs New Original In Stock
Comparator with Voltage Reference CMOS, Push-Pull, Rail-to-Rail, TTL 8-uMAX/uSOP
Quantity
Minimum 1
Minimum 1
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MAX9042BEUA+ Technical Specifications
Category
Linear, Comparators
Packaging
Tube
Series
-
Product Status
Active
Type
with Voltage Reference
Number of Elements
2
Output Type
CMOS, Push-Pull, Rail-to-Rail, TTL
Voltage - Supply, Single/Dual (±)
2.5V ~ 5.5V
Voltage - Input Offset (Max)
1mV @ 5V
Current - Input Bias (Max)
1pA @ 5V
Current - Output (Typ)
8mA
Current - Quiescent (Max)
130µA
CMRR, PSRR (Typ)
80dB CMRR, 80dB PSRR
Propagation Delay (Max)
450ns
Hysteresis
±3mV
Operating Temperature
-40°C ~ 85°C
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type
Surface Mount
Supplier Device Package
8-uMAX/uSOP
Base Product Number
MAX9042
Datasheet & Documents
HTML Datasheet
MAX9042BEUA+-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
-4941-MAX9042BEUA+
Standard Package
50
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
他們的產品經過長時間的使用，依然保持良好狀態，令人滿意。
Dec 02, 2025
DiGi Electronics 的物流流程很有序，並且價格公開透明，服務非常放心。
Dec 02, 2025
Ich schätze die Kosteneffizienz bei DiGi Electronics sehr. Top Qualität zu einem fairen Preis.
Dec 02, 2025
I appreciate how they handle post-purchase issues swiftly and effectively.
Dec 02, 2025
Their products are built to last, providing excellent durability over the years.
Dec 02, 2025
I appreciated the prompt shipping and the careful, secure packaging.
Dec 02, 2025
Great prices that make it easier for hobbyists to access quality electronic components.
Dec 02, 2025
The company’s pricing transparency adds confidence to our procurement decisions.
Dec 02, 2025
DiGi Electronics consistently provides prompt, well-packaged shipments, which we appreciate.
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Frequently Asked Questions (FAQ)
Can the MAX9042BEUA+ be used to replace a TL331 in a low-power battery monitoring circuit, and what are the key trade-offs in terms of quiescent current, speed, and reference integration?
Yes, the MAX9042BEUA+ can replace the TL331 in low-power battery monitoring applications, but with important trade-offs. While the TL331 has a typical quiescent current of 200µA, the MAX9042BEUA+ draws only 130µA max—making it more efficient. However, the MAX9042BEUA+ includes an integrated 1.2V voltage reference, eliminating the need for an external reference required by the TL331, which simplifies design and improves accuracy. On speed, the MAX9042BEUA+ offers a 450ns propagation delay versus the TL331’s ~1µs, enabling faster response in threshold detection. The main drawback is that the MAX9042BEUA+ is a dual comparator, so one channel may go unused, increasing cost per function slightly. For space-constrained, low-power designs where precision and integration matter, the MAX9042BEUA+ is a superior choice despite the dual-channel overhead.
What are the risks of using the MAX9042BEUA+ in a 5V industrial sensor interface with noisy power rails, and how can I mitigate potential false triggering without adding external hysteresis?
The MAX9042BEUA+ has only ±3mV of internal hysteresis, which may be insufficient in electrically noisy industrial environments, risking false output transitions from power rail noise or EMI. Since the device operates down to 2.5V, it’s suitable for 5V systems, but the low hysteresis demands careful layout and filtering. To mitigate false triggering without external hysteresis resistors, use a low-impedance ground plane, place a 100nF ceramic capacitor directly at the VCC pin, and route input signals away from digital lines. Additionally, consider adding a small RC filter (e.g., 1kΩ + 100pF) at each input to attenuate high-frequency noise. If noise persists, evaluate whether the MAX9010EUA+ (with 10mV hysteresis) might be a better fit, though it lacks an internal reference.
Is the MAX9042BEUA+ suitable for overvoltage protection in a 3.3V microcontroller system, and how does its rail-to-rail input and output behavior affect interfacing with a 3.3V TTL logic input?
Yes, the MAX9042BEUA+ is well-suited for overvoltage protection in 3.3V microcontroller systems due to its rail-to-rail input and CMOS/TTL-compatible push-pull outputs. When powered from 3.3V, its output swings within millivolts of the rails, ensuring clean logic-high (>2.4V) and logic-low (<0.4V) levels compatible with 3.3V TTL inputs. The input stage accepts signals up to the supply rail, so monitoring a 3.3V line directly is safe. However, ensure the monitored voltage never exceeds VCC + 0.3V; use a series resistor (e.g., 10kΩ) and Schottky clamp diode to VCC if sensing higher voltages. The integrated 1.2V reference allows precise threshold setting via a resistor divider, avoiding drift from external references—critical for reliable brownout or overvoltage detection.
How does the MAX9042BEUA+ compare to the LMV7219 in a space-constrained, low-voltage audio peak detector, particularly regarding propagation delay, supply range, and package size?
The MAX9042BEUA+ and LMV7219 both come in 8-uMAX packages, but the MAX9042BEUA+ has a clear advantage in low-voltage operation (2.5V min vs. LMV7219’s 2.7V), making it better suited for battery-powered audio peak detectors near end-of-life voltage. Propagation delay is comparable—450ns for the MAX9042BEUA+ vs. 400ns typical for the LMV7219—so both are fast enough for audio envelope detection. However, the MAX9042BEUA+ includes an internal voltage reference, eliminating the need for an external reference required by the LMV7219, saving board space and reducing BOM count. The LMV7219 offers slightly lower input bias current (0.1pA vs. 1pA), but this is negligible in audio applications. For compact, low-voltage designs where integration matters, the MAX9042BEUA+ is the more system-efficient choice.
Can the MAX9042BEUA+ be safely used in an automotive environment with ambient temperatures reaching 105°C, and what derating or design precautions are necessary given its specified -40°C to 85°C operating range?
No, the MAX9042BEUA+ should not be used in environments exceeding 85°C, as its specified operating temperature range is -40°C to 85°C. In automotive under-hood or near-engine applications where temperatures can reach 105°C, this device risks parametric drift, increased propagation delay, and potential latch-up. For such conditions, consider the MAX9042AEUA+ (extended temp range: -40°C to 125°C) or automotive-grade alternatives like the LM2903QVR (AEC-Q100 qualified). If you must use the MAX9042BEUA+, implement thermal management such as copper pour heatsinking, avoid placing it near high-power components, and validate performance at maximum expected ambient temperature during prototype testing. Always monitor long-term reliability, as operating near or above the rated limit accelerates aging and may violate warranty conditions.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
MAX9042BEUA+ CAD Models
Analog Devices Inc./Maxim Integrated MAX9042BEUA+ PCB symbols & footprints
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