NE555DR Precision Timer IC SOP-8

NE555DR Precision Timer IC (SOP-8) delivers accurate timing and pulse generation for countless electronic applications. Designers use it in oscillators, PWM circuits, and precise time delay designs where stable operation and compact SOP-8 packaging are essential.

Key Features:

• Precision Timing: Provides stable and repeatable time delays or oscillations.
• Wide Supply Range: Operates from +4.5 V to +16 V, making it versatile for many circuits.
• Adjustable Duty Cycle: Supports both astable and monostable operation with external resistors and capacitors.
• High Output Drive: Can source or sink up to 200 mA, ideal for driving LEDs, relays, and small loads.
• Low Power Consumption: Efficient design suits battery-powered applications.
• Compact SOP-8 Package: Saves PCB space in surface-mount designs.

Technical Specifications:

• Operating Voltage (V_CC): +4.5 V to +16 V
• Timing Interval: From microseconds to hours, depending on RC values
• Output Current: Up to 200 mA source/sink
• Frequency Range: Up to 500 kHz in astable mode
• Temperature Range: –40 °C to +105 °C
• Input Trigger Voltage: Typically 1/3 V_CC
• Threshold Voltage: Typically 2/3 V_CC

Mechanical Specifications:

• Package Type: SOP-8 surface-mount package
• Lead Finish: Tin-plated for reliable soldering
• Body Material: Epoxy resin molded housing
• Mounting: Suitable for reflow soldering on PCBs

Dimensions:

• Body Size: Approx. 4.9 mm × 3.9 mm
• Lead Pitch: 1.27 mm
• Lead Length: ~0.4 mm to 0.6 mm

Pinout and Wiring:

• Pin 1: GND – Ground reference
• Pin 2: TRIG – Trigger input, starts timing cycle
• Pin 3: OUT – Output pin, drives load
• Pin 4: RESET – Active-low reset, restarts timing
• Pin 5: CTRL – Control voltage input (modifies threshold)
• Pin 6: THRES – Threshold input, compares capacitor voltage
• Pin 7: DISCH – Discharge pin, controls timing capacitor
• Pin 8: VCC – Supply voltage
• Wiring Note: Use external resistor and capacitor at pins 6/7 to set time constant. Add bypass capacitor near VCC for noise stability.

Datasheet Reference:

• Download the official NE555 datasheet from Texas Instruments for detailed electrical characteristics, timing diagrams, and application examples.

Applications:

• Monostable Timer: Generate accurate single pulse outputs.
• Astable Oscillator: Build free-running square wave oscillators.
• Pulse Width Modulation (PWM): Control motor speed and LED brightness.
• Delay Circuits: Create startup delay or watchdog functions.
• Frequency Generator: Use in tone generators and clock signals.

Equivalent Models:

• TLC555: CMOS version with lower power consumption
• LM555: Industry-standard timer IC
• SE555: Military-grade precision timer

Package Includes:

• 1 x NE555DR Precision Timer IC (SOP-8)