TS393IDT

Micropower CMOS dual comparator, 9µA/comparator, 2.7-16V, open-drain, SO-8

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Manufacturer Part：

TS393IDT

Package：

SO-8 (5.0 x 6.2 x 1.75 mm)

Brand：

Product Categories：

Analog Linear ICs, Integrated Circuits ICs

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Description

Product Overview

The TS393IDT from STMicroelectronics is a micropower CMOS dual voltage comparator with extremely low consumption of 9 µA per comparator, 20 times less than the bipolar LM393. It operates from a single 2.7V to 16V supply or dual ±1.35V to ±8V supplies. The device is packaged in an SO-8 footprint and features an open-drain output compatible with wired-OR configurations.

Key Specifications

Number of Comparators	2 (dual)
Supply Voltage Range	2.7V to 16V (single) / ±1.35V to ±8V (dual)
Supply Current	9 µA per comparator (typical)
Input Bias Current	1 pA (typical)
Input Offset Current	1 pA (typical)
Input Common-Mode Range	Includes ground
Output Type	Open-drain
Operating Temperature	-40°C to +125°C
Package	SO-8
Packing	Tape & Reel

Features

Extremely low supply current: 9 µA per comparator (20x less than LM393)
Ultra-low input bias current: 1 pA typical (CMOS input)
Input common-mode voltage range includes ground
Open-drain output for wired-OR connections
Response time comparable to LM393
Wide single or dual supply operation
Ecopack3 (RoHS compliant)
Pin-compatible with LM393

Applications

Battery-powered threshold detection circuits
Window comparators for voltage monitoring
Level shifting and signal conditioning
IR receiver front-end signal detection
Oscillator and timing circuits
Industrial sensor signal detection

Product Introduction:TS393IDT Product Introduction

The TS393IDT is a micropower CMOS dual voltage comparator from STMicroelectronics, offering extremely low power consumption of 9 µA per comparator, which is 20 times less than the industry-standard bipolar LM393. The device maintains response times comparable to the LM393 while dramatically reducing power consumption. The CMOS input stage provides ultra-low input bias current of 1 pA typical, making it suitable for high-impedance sensor interfaces. The input common-mode voltage range includes ground, enabling single-supply operation from 2.7V to 16V. The open-drain output is compatible with wired-OR configurations and can interface with logic levels above or below the supply voltage. The TS393 is pin-compatible with the LM393, enabling direct replacement in power-sensitive applications.

Working Principle:TS393IDT Working Principle

The TS393 operates through three key subsystems:

1. Input Stage: A CMOS differential pair compares the two input voltages (IN+ and IN-). The high-impedance CMOS inputs draw only 1 pA of bias current, enabling connection to high-impedance signal sources without loading effects. The input common-mode range extends from ground to VCC-1.5V, allowing ground-referenced sensing.

2. Comparison Logic: The differential amplifier stage amplifies the voltage difference between IN+ and IN-. When IN+ exceeds IN-, the comparator output transitions. The propagation delay is comparable to the LM393 despite the dramatically lower supply current, achieved through optimized CMOS design. Internal hysteresis can be added externally via positive feedback.

3. Output Stage: An open-drain NMOS transistor provides the output. When the comparator detects IN+ IN-, the output transistor turns off, and the output floats (requires an external pull-up resistor). This open-drain configuration supports wired-OR connections and level shifting to voltages different from the comparator supply.

Pin Description:TS393IDT Pin Definition and Functions

Pin	Name	Type	Function
1	OUT1	Output	Comparator 1 output (open-drain)
2	IN1-	Input	Comparator 1 inverting input
3	IN1+	Input	Comparator 1 non-inverting input
4	GND	Power	Ground / V-
5	IN2+	Input	Comparator 2 non-inverting input
6	IN2-	Input	Comparator 2 inverting input
7	OUT2	Output	Comparator 2 output (open-drain)
8	VCC	Power	Positive supply (2.7–16V)

Application Scenarios:In which products and applications isTS393IDT used

Battery voltage monitoring: Ultra-low 9 µA current consumption enables continuous battery level detection in coin-cell devices with open-drain output for interrupt generation
Window comparator circuits: Dual comparators form upper/lower threshold detection with 1 pA input bias for high-impedance sensor interfaces
IR signal detection: CMOS inputs and fast response time for IR receiver front-end signal threshold detection in remote control applications
Level shifting: Open-drain output enables voltage translation between different logic domains (e.g., 3.3V to 5V) with single supply operation
Relaxation oscillators: Low power consumption and ground-sensing capability for battery-powered timing and clock generation circuits

Alternative Models:What chips are recommended as replacements for TS393IDT

Manufacturer	Part Number	Package	Notes
STMicroelectronics	TS393IPT	TSSOP-8	Same device, TSSOP package
STMicroelectronics	TS3702IDT	SO-8	Push-pull output version
Texas Instruments	LM393DGKR	VSSOP-8	Bipolar, higher current, pin-compatible
onsemi	NCV393DR2G	SOIC-8	Automotive dual comparator
Microchip	MCP6541-I/SN	SOIC-8	Single CMOS comparator, push-pull
NXP	NJM2903M	SOIC-8	Dual comparator, 2V to 36V supply