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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：-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 TSM971ESA+T is a single ultra-low-power analog comparator in an 8-pin SOIC package. It operates on single supplies from +2.5V to +11V or dual supplies of ±1.25V to ±5.5V, drawing a maximum quiescent current of 4μA over temperature. The device features open-drain outputs with a separate GND pin for wired-OR applications and includes an internal 1.182V reference voltage accurate to ±1%. It supports adjustable external hysteresis via a dedicated HYST pin.
Feature Summary
- Ultra-low power consumption with supply current under 4μA across the full operating temperature range
- Integrated 1.182V precision voltage reference with ±1% accuracy
- Open-drain output stages allowing for wired-OR configurations and level shifting
- Adjustable hysteresis capability through an external HYST input pin
Applications
- Threshold detectors
- Window comparators
- Level translators
- Oscillator circuits
- Battery-powered systems
Procurement Notes
Verify the specific suffix 'T' indicates tape-and-reel packaging rather than tube. Confirm the 'E' designation corresponds to the extended industrial temperature range (-40°C to +85°C). Ensure compatibility with the original MAX971 specifications if used as a drop-in replacement. Check for lead-free compliance documentation.
Selection Notes
Select this component when low static current is critical for battery life. The integrated reference eliminates the need for external voltage sources. Use the separate GND pin to interface with different ground potentials. Verify that the open-drain output configuration aligns with the downstream logic requirements.
Part Context
This part belongs to the TSM97x/98x family, which serves as an alternate source for the Maxim Integrated MAX971/MAX972/MAX973 series. The family includes single, dual, and quad variants with varying reference accuracies and hysteresis options. The TSM971 specifically provides a single comparator with a high-precision reference.
Replacement Considerations
- MAX971ESA+
FAQ
How is hysteresis configured on the TSM971?
Hysteresis is adjusted by connecting external resistors between the REF, HYST, and V- pins. Connecting HYST directly to REF disables hysteresis.
What is the function of the GND pin on the TSM971?
The GND pin allows the open-drain output to sink current to ground independently of the negative supply rail (V-), facilitating wired-OR connections and level shifting.
