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LM393PWR

Dual comparator, 2-36V, 5mV Vos, open-collector, TSSOP-8

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Manufacturer Part：

LM393PWR

Package：

TSSOP-8 / PW-8 (3.0 x 4.4 x 1.2 mm, 0.65mm pitch)

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Description

Product Overview

The LM393PWR from Texas Instruments is a dual differential comparator in a TSSOP-8 package. It features low input offset voltage (5mV max), low supply current (0.4mA typical), and wide supply voltage range (2V to 36V). The open-collector output allows wired-OR connections and interfacing with logic families.

Key Specifications

Number of Comparators 2
Supply Voltage Range 2V to 36V (single) / +/-1V to +/-18V (dual)
Input Offset Voltage 5 mV max
Input Bias Current 250 nA typical
Input Offset Current 50 nA typical
Supply Current 0.4 mA typical (both comparators)
Output Sink Current 16 mA typical
Response Time 1.3 us typical (TTL-level input step)
Common-Mode Input Range 0V to VCC-1.5V
Output Type Open-collector
Operating Temperature -40 to 125 C
Package TSSOP-8 (PW)

Features

  • Dual independent comparators
  • Wide supply voltage: 2V to 36V
  • Very low supply current: 0.4mA typical
  • Low input offset voltage: 5mV max
  • Open-collector output for wired-OR
  • Input common-mode range includes ground
  • Low output saturation voltage: 250mV @ 4mA
  • Compatible with all logic families (TTL, DTL, ECL, MOS, CMOS)

Applications

  • Voltage comparison and threshold detection
  • Zero-crossing detectors
  • Window comparators
  • Oscillators and timing circuits
  • Battery monitoring

The LM393PWR from TI is a dual differential comparator in TSSOP-8. Wide 2-36V supply with only 0.4mA quiescent current. 5mV max input offset and open-collector output for wired-OR connections. Common-mode input range includes ground. Response time of 1.3us typical. PWR suffix denotes TSSOP-8 tape-and-reel packaging. Ideal for threshold detection, zero-crossing detectors, and battery monitoring.

Each comparator consists of a differential input stage and an open-collector output stage. When the voltage at the non-inverting input (+) exceeds the voltage at the inverting input (-), the output transistor is off (open-collector, externally pulled high). When the inverting input exceeds the non-inverting input, the output transistor turns on, sinking current to ground. The open-collector configuration allows multiple outputs to be wire-ORed together and enables the output to drive loads at a different voltage than the comparator supply. The response time of 1.3us is measured for a small TTL-level input step with 5mV overdrive.

Pin Name Type Function
1 OUT A Output Comparator A output (open-collector)
2 IN- A Input Comparator A inverting input
3 IN+ A Input Comparator A non-inverting input
4 GND Power Ground (negative supply)
5 IN+ B Input Comparator B non-inverting input
6 IN- B Input Comparator B inverting input
7 OUT B Output Comparator B output (open-collector)
8 VCC Power Positive supply (2-36V)
  • Battery low-voltage detector with reference divider on inverting input
  • Window comparator using both comparators for over/undervoltage
  • Zero-crossing detector for AC line monitoring
  • Sensor threshold alarm (thermistor, photodiode)
  • Relaxation oscillator with hysteresis feedback
Manufacturer Part Number Package Notes
TI LM393DR SOIC-8 SOIC package version
TI LM2903PWR TSSOP-8 Automotive grade, wider temp range
Microchip MCP6541T-I/OT SOT-23-5 Single push-pull comparator
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