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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/LATCH SC70-6
- 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：6-TSSOP, SC-88, SOT-363
- Mounting Type：Surface Mount
- Supplier Device Package：SC-70-6
- Grade：-
- Qualification：-
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Overview
The MAX9109EXT+T is a single-channel, high-speed, low-power voltage comparator designed for +5V systems. It features a 25ns propagation delay with 10mV input overdrive and consumes only 350µA per channel. The device operates on a single supply from 4.5V to 5.5V and includes internal hysteresis of 2mV for clean switching. Its wide common-mode input range extends from 200mV below ground to within 1.5V of the positive rail. Outputs are TTL-compatible without external pullups. A unique feature is the integrated output latch controlled by a dedicated LE pin.
Feature Summary
- Incorporates an internal latch mechanism to store comparison results via a dedicated Latch Enable (LE) pin.
- Features fixed internal hysteresis to prevent oscillation during slow-moving input signals.
- Provides TTL-compatible outputs that do not require external pullup circuitry.
- Supports a wide input common-mode range extending below ground potential.
Applications
- Battery-powered infrared data links
- Threshold detectors and discriminators
- Zero-crossing detectors
Procurement Notes
Verify the specific ordering suffix EXT+T corresponds to the SC70-6 package configuration. Confirm RoHS compliance status through official manufacturer documentation. Ensure the component matches the Analog Devices/Maxim Integrated branding. Validate the part number against current datasheet revisions to confirm availability and specifications.
Selection Notes
Select this component when a single comparator with latching capability is required in a space-constrained design. It serves as a direct upgrade to older industry-standard comparators like the MAX909. Consider the 25ns delay and 350µA power consumption for timing-critical applications. Verify that the single-supply operation aligns with the system's power architecture.
Part Context
This device belongs to the MAX9107/MAX9108/MAX9109 family of high-speed, low-power voltage comparators. While the MAX9107 offers dual channels and the MAX9108 provides quad channels, the MAX9109 is configured as a single unit. All variants share similar electrical characteristics but differ in package options and channel counts.
Replacement Considerations
The MAX9109 is documented as a higher-speed, lower-power upgrade to the MAX909. Designers replacing legacy parts should verify pin compatibility and ensure the new latch functionality does not conflict with existing logic states.
FAQ
How does the internal latch function?
The latch stores the comparison result when the Latch Enable (LE) pin is driven high. When LE is low, the device operates transparently as a standard comparator.
What is the purpose of the internal hysteresis?
The 2mV internal hysteresis prevents output oscillation caused by noise or parasitic feedback when the input signal changes slowly near the trip point.
