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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)
- 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 from the MAX9107/08/09 family. It operates on a single +5V supply (4.5V to 5.5V) with a propagation delay of 25ns at 10mV input overdrive and consumes only 350µA per channel. The device features TTL-compatible outputs, eliminating the need for external pullup resistors. It includes internal hysteresis for clean switching and an integrated latch controlled by a dedicated LE pin. The component is housed in an 8-pin SO package.
Feature Summary
- TTL-compatible outputs require no external pullup circuitry
- Internal hysteresis ensures clean output switching
- Integrated latch stores comparison results via LE pin
Applications
- Battery powered systems
- A/D converters
- Line receivers
- Threshold detectors/discriminators
- Sampling circuits
- Zero-crossing detectors
Procurement Notes
Verify that the ordering suffix 'T' corresponds to tape-and-reel packaging rather than tube configuration. Confirm the specific manufacturer's datasheet revision matches the required electrical characteristics. Ensure the 8-pin SO package footprint aligns with the PCB design constraints before finalizing procurement.
Selection Notes
Select this part when a single comparator with latching capability is required. It serves as a direct upgrade to older industry-standard comparators like the MAX909. Choose this model if the application demands low power consumption alongside fast response times within a standard 5V logic environment.
Part Context
This component belongs to the MAX9107/MAX9108/MAX9109 series of high-speed, low-power voltage comparators. While the MAX9107 offers dual channels and the MAX9108 provides quad channels, the MAX9109 specifically integrates a single channel with an additional latch function. All variants share identical speed and power specifications.
Replacement Considerations
MAX909EUA+T
FAQ
How does the internal hysteresis affect the input trip points?
The fixed 2mV internal hysteresis creates two distinct trip points for rising and falling inputs, preventing oscillation near the threshold without requiring external resistors.
What is the function of the LE pin on the MAX9109?
The LE (Latch Enable) pin controls the internal latch. When LE is low, the comparator operates transparently; when LE is high, the current output state is latched.
