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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/LATCH 8SOIC
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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+T is a single-channel, high-speed voltage comparator designed for +5V systems. It features a 25ns propagation delay with 350µA supply current per channel. The device operates on a single 4.5V to 5.5V supply and includes internal hysteresis of 2mV. Its wide input common-mode range extends from 200mV below ground to within 1.5V of the positive rail. Outputs are TTL-compatible without external pullups. The MAX9109 specifically incorporates an internal latch controlled by a Latch Enable (LE) pin.
Feature Summary
- Internal 2mV hysteresis eliminates external resistors and ensures clean switching
- TTL-compatible outputs require no external pullup circuitry
- Wide input common-mode range includes ground potential
- Integrated output latch allows comparison result storage
Applications
- Battery powered systems
- A/D converters
- Line receivers
- Threshold detectors/discriminators
- Sampling circuits
- Zero-crossing detectors
Procurement Notes
Verify the package code S8-2 corresponds to the 8-pin SO configuration. Confirm RoHS compliance via the '+' suffix in the ordering information. Ensure the design utilizes a single 4.5V to 5.5V supply. Check that the application requires the specific latch functionality unique to the MAX9109 model.
Selection Notes
Select this component when a single comparator with latching capability is required. It serves as a lower-power upgrade to the MAX909. Consider the MAX9107 or MAX9108 if multiple channels are needed. Verify that the 25ns delay meets system timing requirements under the expected capacitive load conditions.
Part Context
Part of the MAX9107/MAX9108/MAX9109 family of low-power, high-speed comparators. These devices replace industry-standard MAX907/MAX908/MAX909 parts. The MAX9109 is the single-channel variant featuring an internal latch, distinct from the dual MAX9107 and quad MAX9108 models.
Replacement Considerations
MAX909EUA+T
FAQ
How does the internal latch function?
The latch is transparent when the LE pin is low. When LE goes high, the comparator output state is stored until LE returns low.
What is the input offset voltage specification?
The typical input offset voltage is 1.6mV at +25°C, with a maximum of 4.0mV across the operating temperature range.
