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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/LATCH 8SOIC
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tube
- Type：with Latch
- Number of Elements：1
- Output Type：TTL
- Voltage - Supply, Single/Dual (±)：4.5V ~ 5.5V
- Voltage - Input Offset (Max)：1.6mV @ 5V
- Current - Input Bias (Max)：0.125µA @ 5V
- Current - Output (Typ)：-
- Current - Quiescent (Max)：700µA
- CMRR, PSRR (Typ)：86.02dB CMRR, 86.02dB PSRR
- Propagation Delay (Max)：25ns
- Hysteresis：2mV
- Operating Temperature：-40°C ~ 85°C
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The MAX9109ESA+ is a single-channel, high-speed voltage comparator designed for single +5V supply systems. It features a propagation delay of 25ns with 10mV input overdrive and consumes only 350µA (1.75mW) per comparator. The device operates within a supply voltage range of 4.5V to 5.5V and includes an internal latch controlled by a Latch Enable (LE) pin. It offers TTL-compatible outputs without external pullups, wide input common-mode range extending from ground to within 1.5V of VCC, and low offset voltage.
Feature Summary
- Incorporates internal hysteresis to ensure clean output switching during slow-moving input signals.
- Features an internal latch mechanism that stores comparison results when the LE pin is asserted high.
- Provides TTL-compatible outputs that eliminate the need for external pullup circuitry.
Applications
- Battery-powered systems
- Analog-to-digital converters
- Line receivers
- Threshold detectors and discriminators
- Zero-crossing detectors
Procurement Notes
Verify the specific package code S8-2 corresponds to the 8-pin SO configuration. Confirm RoHS compliance status via the manufacturer's documentation. Ensure the ordering suffix matches the required tape-and-reel or tube packaging format. Validate that the component meets the -40°C to +85°C operating temperature range requirements for your application environment.
Selection Notes
Select this component for applications requiring fast response times with minimal power consumption on a single 5V rail. The integrated latch distinguishes it from standard comparators, allowing for data storage capabilities. Consider the 8-pin SO package constraints regarding thermal dissipation and board space compared to smaller SC70 or SOT23 options available in the same family.
Part Context
This part belongs to the MAX9107/MAX9108/MAX9109 series of high-speed, low-power voltage comparators. It serves as a successor to industry-standard parts like the MAX909, offering improved speed and lower cost. The MAX9109 specifically provides a single channel with latch functionality, contrasting with the dual MAX9107 and quad MAX9108 variants.
Replacement Considerations
The datasheet identifies the MAX909 as the industry-standard comparator upgraded by this series. Verify functional compatibility regarding latch requirements and output drive characteristics when substituting legacy components.
