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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/VOLT REF 8SOIC
- Series：TSM92x
- Mfr：Silicon Labs
- Package：Tube
- Type：with Voltage Reference
- Number of Elements：1
- Output Type：CMOS, Push-Pull, TTL
- Voltage - Supply, Single/Dual (±)：2.5V ~ 11V, ±1.25V ~ 5.5V
- Voltage - Input Offset (Max)：10mV @ 2.5V
- Current - Input Bias (Max)：-
- Current - Output (Typ)：40mA
- Current - Quiescent (Max)：3.2µA
- CMRR, PSRR (Typ)：80dB CMRR, 80dB PSRR
- Propagation Delay (Max)：12µs
- Hysteresis：50mV
- 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 TSM921ESA+ is a single-channel, low-voltage, micropower analog comparator manufactured by Silicon Labs. It operates from a single supply of +2.5V to +11V or dual supplies of ±1.25V to ±5.5V. The device features ultra-low quiescent current, drawing less than 4μA over temperature. It includes an internal 1.182V ±1% reference voltage and supports adjustable external hysteresis via a dedicated pin. The push-pull output stage provides TTL/CMOS compatibility with continuous source current capability up to 40mA and propagation delay of 12μs at 10mV overdrive.
Feature Summary
- Ultra-low quiescent current consumption for battery-powered applications
- Internal 1.182V precision voltage reference
- Adjustable hysteresis via dedicated input pin
- Push-pull outputs with high continuous source current
Applications
- Threshold detectors
- Window comparators
- Level translators
- Oscillator circuits
- Battery-powered systems
Procurement Notes
Verify the specific suffix 'ESA+' indicates the industrial temperature range (-40°C to +85°C) and SOIC-8 package configuration as documented in the ordering information. Confirm lead-free status and packaging type (tube vs. tape & reel) against current distributor listings. Ensure the component matches the electrical specifications for single-supply operation within the 2.5V to 11V range.
Selection Notes
Select this component when a single comparator with an integrated reference and adjustable hysteresis is required. It is suitable for designs needing high output drive capability (40mA source) while maintaining microampere-level power consumption. Consider the TSM923ESA+ if dual channels are needed, or the TSM924ESA+ for quad configurations. Ensure the application voltage stays within the specified single or dual supply limits.
Part Context
The TSM921ESA+ belongs to the TSM921-TSM924 family of analog comparators from Silicon Labs. This family is electrically and form-factor identical to the MAX921-MAX924 series. The 'TSM921' designation specifically denotes the single-channel variant within this lineup, which uniquely combines a single comparator, an internal reference, and a hysteresis control pin in one package.
Replacement Considerations
The datasheet states the TSM921-TSM924 family is electrically and form-factor identical to the Maxim Integrated MAX921-MAX924 family. These parts may serve as direct replacements. Verify pinout compatibility and electrical parameters before substitution.
FAQ
How is hysteresis configured on the TSM921?
Hysteresis is adjusted using two external resistors connected between the REF, HYST, and V- pins. Connecting the HYST pin directly to the REF pin disables hysteresis.
What is the input common-mode voltage range?
The input common-mode voltage range extends from the negative supply rail (V-) to within 1.3V of the positive supply rail (V+).
