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Product Detailed Parameters
- Description：IC COMPARATOR 2 GEN PUR SOT23-8
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：General Purpose
- Number of Elements：2
- Output Type：CMOS, Push-Pull, TTL
- Voltage - Supply, Single/Dual (±)：2.7V ~ 5.5V
- Voltage - Input Offset (Max)：2mV @ 5V
- Current - Input Bias (Max)：0.32µA @ 5V
- Current - Output (Typ)：-
- Current - Quiescent (Max)：300µA
- CMRR, PSRR (Typ)：81.94dB CMRR, 81.94dB PSRR
- Propagation Delay (Max)：40ns
- Hysteresis：1.5mV
- Operating Temperature：-40°C ~ 85°C
- Package / Case：SOT-23-8
- Mounting Type：Surface Mount
- Supplier Device Package：SOT-23-8
- Grade：-
- Qualification：-
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Overview
The MAX9142EKA+T is a dual-channel, high-speed analog comparator from the MAX9140 series. It operates on a single supply voltage ranging from 2.7V to 5.5V and features rail-to-rail input capability extending beyond both power-supply rails. The device provides CMOS/TTL-compatible outputs that pull to within 300mV of either supply rail without external pullup circuitry. Key electrical specifications include a propagation delay of 40ns at 10mV overdrive, a typical supply current of 150µA per comparator, and an internal hysteresis of 1.5mV. It is housed in an 8-pin SOT-23 package.
Feature Summary
- Rail-to-rail input voltage range extends beyond both power-supply rails for flexible signal interfacing.
- CMOS and TTL logic compatible outputs eliminate the need for external pullup resistors.
- Internal fixed hysteresis prevents output oscillation caused by noise or slow-moving input signals.
- Continuous short-circuit protection allows all pins to tolerate faults to either supply rail.
Applications
- Line receivers
- Threshold detectors and discriminators
- Zero-crossing detectors
- Sampling circuits
Procurement Notes
Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the 'E' grade designation aligns with the required -40°C to +85°C operating temperature range. Ensure the 8-pin SOT-23 footprint matches the PCB land pattern requirements. Cross-reference the manufacturer part number against official Analog Devices documentation to confirm RoHS compliance status.
Selection Notes
Select this component for applications requiring low power consumption alongside moderate speed performance. The dual-channel configuration is suitable for systems needing two independent comparison functions in a compact footprint. Verify that the 1.5mV internal hysteresis meets the noise immunity requirements; additional external hysteresis may be necessary if higher noise margins are needed.
Part Context
This device belongs to the MAX9140/MAX9141/MAX9142/MAX9144 family of comparators. It serves as a lower-power, higher-speed alternative to industry-standard parts like the MAX941/942/944. While the MAX9141 adds latch and shutdown capabilities, the MAX9142 focuses on providing dual channels with standard rail-to-rail operation in the same small form factor.
Replacement Considerations
MAX9142ESA+
