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Product Detailed Parameters
- Description：IC COMPARATOR 1 W/VOLT REF 8SOIC
- Series：TSM97x
- Mfr：Silicon Labs
- Package：Tube
- Type：with Voltage Reference
- Number of Elements：1
- Output Type：Open-Drain
- Voltage - Supply, Single/Dual (±)：2.5V ~ 11V, ±1.25V ~ 5.5V
- Voltage - Input Offset (Max)：10mV @ 2.5V
- Current - Input Bias (Max)：0.005µA @ 2.5V
- Current - Output (Typ)：40mA
- Current - Quiescent (Max)：4µA
- CMRR, PSRR (Typ)：67dB CMRR, 67dB PSRR
- Propagation Delay (Max)：12µs
- Hysteresis：50mV
- Operating Temperature：0°C ~ 70°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 TSM971CSA+ is a single-channel, ultra-low-power analog comparator manufactured by Silicon Labs. It operates on a single supply voltage ranging from +2.5V to +11V or dual supplies of ±1.25V to ±5.5V. The device features an internal 1.182V reference with ±1% accuracy and open-drain outputs suitable for wired-OR configurations. It draws a maximum quiescent current of 4μA over the temperature range. The component exhibits a propagation delay of 12μs at 10mV overdrive and accepts input voltages down to the negative supply rail. It is housed in an 8-pin SOIC package.
Feature Summary
- Ultra-low power consumption with maximum quiescent current of 4μA
- Integrated 1.182V precision voltage reference
- Open-drain output stages enabling wired-OR logic applications
- Input common-mode voltage range extends to the negative supply rail
Applications
- Threshold detectors
- Window comparators
- Level translators
- Oscillator circuits
- Battery-powered systems
Procurement Notes
Verify that the ordering suffix CSA+ corresponds to the standard tube packaging configuration as documented in the manufacturer's ordering information. Confirm the specific temperature grade (C) matches the required operational environment of 0°C to +70°C. Ensure compatibility with the 8-pin SOIC footprint during PCB layout review.
Selection Notes
Select this component when a single comparator with an integrated reference is required for low-voltage designs. It serves as a direct electrical and form-factor replacement for the MAX971 family. Consider the open-drain output requirement for pull-up resistor implementation. Verify that the 12μs response time meets the system timing constraints.
Part Context
This part belongs to the TSM97x/98x family of micropower analog comparators produced by Silicon Laboratories. The family includes single, dual, and quad variants designed for 3V and 5V single-supply applications. These devices are characterized as electrically and physically identical to the Maxim Integrated MAX97x series, providing a second-source option for existing designs.
Replacement Considerations
The datasheet explicitly identifies the TSM971 as an alternate source for the MAX971. Designers replacing the MAX971 should verify that the pinout and electrical characteristics remain compatible with the original design specifications.
