Part Number: TS391ILT

Manufacturer: STMicroelectronics

Description: IC COMPARATOR 1 GEN PUR SOT23-5

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of TS391ILT

Datasheet  TS391ILT datasheet
Category Integrated Circuits (ICs)
Family Linear – Comparators
Manufacturer STMicroelectronics
Packaging Tape & Reel (TR)
Part Status Active
Type General Purpose
Number of Elements 1
Output Type CMOS, DTL, ECL, Open-Collector, TTL
Voltage – Supply, Single/Dual (±) 2 V ~ 36 V, ±1 V ~ 18 V
Voltage – Input Offset (Max) 5mV @ 5V
Current – Input Bias (Max) 0.25μA @ 5V
Current – Output (Typ) 16mA @ 5V
Current – Quiescent (Max) 1.25mA
Propagation Delay (Max)
Operating Temperature -40°C ~ 125°C
Package / Case SC-74A, SOT-753
Mounting Type Surface Mount
Supplier Device Package SOT-23-5


The TS391ILT is a versatile and high-efficiency low-power voltage comparator that may be used in a variety of electronic applications. This detailed tutorial will go through the TS391ILT’s characteristics, specifications, and potential applications, giving you a solid grasp of this exceptional component.

Introduction to the TS391ILT

The TS391ILT is a specialized voltage comparator designed to work with a single or split power supply, making it extremely adaptable for voltage monitoring and signal processing operations. It has a number of distinguishing traits that set it different in the realm of analog electronics.


A Closer Look at the TS391ILT

The TS391ILT voltage comparator is well-known for its high performance and versatility. Let’s look at its essential characteristics to see why it’s a popular choice among engineers and designers.

● Wide Voltage Range Compatibility

The TS391ILT is designed to perform well in a variety of voltage situations. It can function over a large single source voltage range of 2 V to 36 V. Furthermore, it can work with dual power supply ranging from 1 V to 18 V. Because of its versatility, it is ideal for a wide range of applications, from low-power handheld devices to industrial systems.

● Ultra-Low Power Consumption

The TS391ILT excels at efficiency, which is critical in modern electronics. This comparator has an extremely low supply current of about 0.2 mA regardless of supply voltage. It wastes only 1 mW per comparator at 5 V supply voltage. Such low power usage transforms battery-powered devices and energy-efficient designs.

● Precision Performance

Precision is an important requirement in many electronic applications, and the TS391ILT meets this need. It has a low input bias current of 25 nA (typical), which ensures little noise in high-impedance circuits. The low input offset current of 5 nA (typical) and low input offset voltage of 2 mV for TS391A help to accurate and dependable signal processing.

● Ground-Inclusive Input Range

The TS391ILT is distinguished by its capacity to receive input common-mode voltage that includes ground. This property simplifies circuit design and increases its applicability in systems with a high proportion of ground-referenced signals. In many applications, this capability can simplify circuit design and minimize component count.

● Low Output Saturation Voltage

The TS391ILT contributes to signal integrity by having a low output saturation voltage of roughly 250 mV (typical) at an output current of 4 mA. This low saturation voltage ensures minimal signal distortion, which is especially important in high-speed applications.

● Wide Differential Input Range

The differential input voltage range of the TS391ILT is equal to the supply voltage. This means that it can handle a wide range of input voltages without clipping or distortion, making it useful for a variety of signal processing jobs.

● Compatibility with Multiple Logic Families

Compatibility is critical in the ever-changing universe of technological gadgets. This requirement is met by the TS391ILT, which provides outputs that are compatible with a variety of logic families, including TTL, DTL, ECL, and CMOS. This adaptability enables smooth integration into various electrical systems.


The TS391ILT voltage comparator is an outstanding electrical component with outstanding features and performance characteristics. Its adaptability makes it a great tool in a variety of applications, contributing to improved functionality and efficiency. Let’s take a closer look at some of the major applications where the TS391ILT excels.

  • Battery-Powered Devices: Because of its extremely low power consumption, it is perfect for portable and battery-powered devices, prolonging battery life and improving portability.
  • Voltage Monitoring: The TS391ILT is ideal for monitoring voltage levels in power supply to ensure steady and dependable operation.
  • Signal Conditioning: It excels at conditioning analog signals in a wide range of sensor applications, resulting in precise measurements.
  • Designers can employ comparator-based switching in switch-mode power supply, audio amplifiers, and other circuits that require precision switching.
  • Industrial Control: The TS391ILT can be used in industrial automation and control systems for precise process control and monitoring.

The TS391ILT is a versatile and efficient voltage comparator designed to fulfill the needs of current electronics. Its compliance with a wide voltage range, low power consumption, precision performance, and interoperability with many logic families make it a beneficial component in a wide range of applications. The TS391ILT is a dependable solution for building power-efficient devices, monitoring voltages, or processing analog signals.

Parameter Symbol Value Unit
Supply Voltage VCC ±18 (or 36 dual supply) V
Differential Input Voltage Vid ±36 V
Input Voltage Vi -0.3 to 36 V
Output Voltage (1) Vo Up to 36 V
Output Short-Circuit to VCC+ (2) Potential for Excessive Heating and Destruction
Maximum Output Current Approx. 20 mA mA
Maximum Junction Temperature Tj 150 °C
Storage Temperature Range Tstg -65 to 150 °C
Thermal Resistance Junction to Ambient (3)
– SOT23-5 250 °C/W
– DFN8 2×2 57 °C/W
Electrostatic Discharge (ESD) Ratings
– Human Body Model (HBM) (4) 1500 V
– Machine Model (MM) (5) 100 V
– Charged Device Model (CDM) (6) 1000 V
Notes and Additional Information
  • Even if VCC is lower, the output voltage can be tuned to up to 36 V.
  • Short circuits from the output to VCC+ can result in excessive heating and possible destruction. The highest output current is roughly 20 mA, regardless of VCC+ magnitude.
  • Excessive heating can be caused by short circuits. These are typical values.
  • Human body model: a 100 pF capacitor is charged to the desired voltage, then discharged via a 1.5 k resistor connected to two device pins. This is done for all connected pin pairs while the other pins are floating.
  • Machine model: a 200 pF capacitor is charged to the necessary voltage and then discharged directly between the device’s two pins with no external series resistor (internal resistor 5). This is done for all connected pin pairs while the other pins are floating.
  • Charged device model: all pins and package are charged to the desired voltage together and then discharged to ground via only one pin. This is repeated for all pins.

These specs and accompanying comments contain detailed information regarding the operational limits, ESD ratings, and precautions for safe use in electronic circuits of the TS391ILT.


The TS391ILT is a versatile and highly efficient voltage comparator that has been precisely designed to meet the ever-changing needs of modern electronics. Its outstanding characteristics, such as wide voltage range compatibility, extremely low power consumption, and pinpoint accuracy performance, make it a vital component in a wide range of applications. Whether you’re working on battery-powered devices, voltage monitoring, or intricate signal conditioning, you can count on the TS391ILT to be a reliable partner, providing unrivaled performance and efficiency.

Contact ICRFQ, a reputable provider of Chinese electronic components, for a thorough examination of the TS391ILT’s excellent qualities and to place your order. This is a once-in-a-lifetime opportunity; the TS391ILT has the ability to take your electronic creations to new heights. Contact ICRFQ immediately to take advantage of the TS391ILT’s advantages.

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