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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/VOLT REF 8SOIC
- Series：TSM92x
- Mfr：Silicon Labs
- Package：Tape & Reel (TR)
- 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+T is a single-channel, ultra-low-power 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 an internal 1.182V ±1% reference voltage and adjustable hysteresis via a dedicated pin. It delivers push-pull TTL/CMOS-compatible outputs with a continuous source current capability of 40mA and crowbar-current-free switching. Quiescent current is typically under 4μA over temperature. Propagation delay is 12μs at 10mV overdrive. It is housed in an 8-pin SOIC package.
Feature Summary
- Ultra-low quiescent current consumption suitable for battery-powered systems
- Integrated 1.182V precision voltage reference with adjustable hysteresis control
- Push-pull output stage capable of sourcing up to 40mA continuously
- Wide common-mode input voltage range extending to the negative supply rail
Applications
- Threshold detectors
- Window comparators
- Level translators
- Oscillator circuits
- Battery-powered systems
Procurement Notes
Verify the specific suffix 'T' indicates tape and reel packaging containing 2500 units per carrier. Confirm the 'ESA' designation corresponds to the extended industrial temperature range of -40°C to +85°C. Ensure compatibility with the 8-pin SOIC footprint. Check for lead-free compliance status as specified in the ordering information section of the datasheet.
Selection Notes
Select this component when a single comparator with an integrated reference and hysteresis is required. It is appropriate for low-voltage single-supply applications ranging from 2.5V to 11V. Consider this part for designs needing high output drive current without external transistors. Verify that the 12μs propagation delay meets the timing requirements of the target application.
Part Context
This part belongs to the TSM921-TSM924 family of micropower comparators. It is electrically and form-factor identical to the MAX921-MAX924 series. The family includes single, dual, and quad variants. The TSM921 specifically provides one comparator channel with an internal reference and hysteresis pin, distinguishing it from the TSM922 which lacks these features.
Replacement Considerations
The datasheet states electrical and form-factor identity with the MAX921-MAX924 family. Verify pinout and parameter equivalence before substitution.
FAQ
How is external hysteresis configured on the TSM921?
External hysteresis is added using two resistors connected to the HYST pin. Connecting the HYST pin directly to the REF pin disables external hysteresis.
What is the input common-mode voltage range?
The input voltage range extends from the negative supply rail (V-) to within 1.3V of the positive supply rail (V+).
