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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/LATCH SOT6
- 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：SOT-23-6
- Mounting Type：Surface Mount
- Supplier Device Package：SOT-6
- Grade：-
- Qualification：-
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Overview
The MAX9109EUT+T is a single-channel, high-speed, low-power 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 the LE pin. It offers TTL-compatible outputs without external pullups, wide input common-mode range extending below ground, and internal hysteresis.
Feature Summary
- Incorporates an internal latch mechanism for storing comparison results via the LE pin
- Features built-in 2mV internal hysteresis to ensure clean output switching
- Provides TTL-compatible outputs requiring no external pullup circuitry
- Supports wide input common-mode range including voltages below ground
Applications
- Battery powered systems
- A/D converters
- Line receivers
- Threshold detectors/discriminators
- Zero-crossing detectors
Procurement Notes
Verify the specific ordering suffix '+T' indicates tape-and-reel packaging configuration. Confirm the 'E' suffix denotes the extended industrial temperature range (-40°C to +85°C). Ensure the 'U' package code corresponds to the SOT-23-6 footprint required for your PCB layout. Cross-reference the manufacturer's latest datasheet revision to confirm pinout consistency.
Selection Notes
Select this component when a single comparator channel with latching capability is required in a space-constrained design. It serves as a direct upgrade to older industry-standard comparators like the MAX909, offering higher speed and lower power consumption. Ideal for applications needing TTL logic levels directly from the output without additional pull-up resistors.
Part Context
This part belongs to the MAX9107/MAX9108/MAX9109 family of high-speed, low-power voltage comparators. While the MAX9107 provides dual channels and the MAX9108 offers quad channels, the MAX9109 specifically integrates a single channel with an internal latch feature. All variants share similar electrical characteristics regarding speed and power efficiency.
Replacement Considerations
The MAX9109 is documented as a higher-speed, lower-power, lower-cost upgrade to the MAX909. Designers replacing the MAX909 should verify that the internal latch functionality does not interfere with existing circuit timing or logic requirements.
FAQ
How does the internal latch function on the MAX9109?
The latch stores the result of a comparison. When the Latch Enable (LE) pin is low, the latch is transparent and the comparator operates normally. When LE is high, the output state is latched.
What is the purpose of the internal hysteresis?
The 2mV internal hysteresis eliminates oscillation in the linear region caused by noise or parasitic AC feedback, ensuring clean output switching even with slow-moving input signals.
