
LM393 Chip
The LM393 Chip is a dual differential comparator IC that continuously compares two input voltages and drives its output according to which side is greater, making it the heart of countless sensor boards and threshold-detection circuits. Checking the LM393 price in Bangladesh is a smart first move for anyone building sound sensors, light sensors, smoke detectors, or battery protection circuits on a tight budget. University engineering students and makers buy LM393 chips in Bangladesh to design custom sensor front-ends, zero-cross detectors, and voltage-level watchdogs for Arduino, ESP32, and robotics work. It runs from a single 2V to 36V supply (or dual supplies) and its open-collector outputs connect directly to TTL and CMOS logic with a simple pull-up resistor.
Key Features:
• Two independent precision differential comparators in one DIP-8 package
• Wide single-supply range of 2V to 36V, or dual supplies up to ±18V
• Low input offset voltage of typically 1-2mV for accurate threshold sensing
• Open-collector outputs with 20mA sink capability — TTL and CMOS compatible
• Very low supply current of roughly 0.4mA per comparator
• Common-mode input range extends down to ground (V-), ideal for single-supply designs
• Perfect for sensor threshold boards, voltage monitors, oscillators, and PWM circuits
Not sure it will work? Test your circuit free in Tekko Sim — on your phone, in Bangla or English.
| Category | Modules |
| Model no. | LM393 |
| Availability | In stock |
| In stock | 5 pcs |
| Delivery | Cash on Delivery, nationwide Bangladesh |
| Part Number | LM393 (LM393N / LM393D equivalents) |
| Function | Dual independent differential voltage comparator |
| Package | DIP-8 through-hole |
| Supply Voltage | 2V to 36V single supply, or ±1V to ±18V dual |
| Input Offset Voltage | Typically 1mV (max 5mV at 25C) |
| Input Common-Mode Range | 0V to VCC - 1.5V |
| Output Type | Open collector, requires pull-up resistor |
| Output Sink Current | Up to 20mA |
| Supply Current | Approximately 0.4mA per comparator (typical) |
| Response Time | Approximately 1.3 microseconds |
| Operating Temperature | 0C to +70C (commercial grade) |
| Applications | Sensor threshold detection, window comparators, zero-cross detection, oscillators |
| Compatible With | Arduino, ESP32, STM32, Raspberry Pi logic circuits |
