NE556-HLF-Dual precision Timer IC DIP-14

NE556-HLF-Dual precision Timer IC DIP-14 is a highly versatile and reliable integrated circuit that combines two independent NE555 timers into a single 14-pin package. This dual-timer configuration allows engineers to create complex timing circuits while saving significant PCB real estate. Furthermore, each timer operates independently, sharing only the supply voltage and ground pins, which ensures stable performance for each channel. Designers frequently utilize this IC for generating precise time delays or oscillations in both monostable and astable modes. Consequently, the NE556 remains a staple in the electronics industry for its robust drive capability and wide supply voltage range. Therefore, you should consider this dual precision timer for any project requiring synchronized or sequential timing pulses.

Key Features:

• Dual Timer Functionality: Provides two independent 555-type timers in a single DIP-14 package, reducing component count and assembly costs.
• High Output Current: Each output can source or sink up to 200 mA, allowing it to drive TTL loads, relays, or small motors directly.
• Wide Timing Range: Supports timing intervals ranging from microseconds to several hours depending on external resistor and capacitor values.
• Adjustable Duty Cycle: Offers extensive control over the output waveform, making it suitable for Pulse Width Modulation (PWM) applications.
• Temperature Stability: Features excellent stability with a temperature drift of only 0.005% per °C, ensuring consistent performance in varying environments.

Technical Specifications:

• Supply Voltage (V_CC): 4.5 V to 16 V
• Timing Error (Monostable): Typically 1%
• Maximum Operating Frequency: ≈ 500 kHz
• Trigger Voltage: 1/3 of V_CC
• Threshold Voltage: 2/3 of V_CC
• Operating Temperature: 0°C to +70°C
• Power Dissipation: 600 mW maximum

Mechanical Specifications:

• Package Type: DIP-14 (Dual In-line Package)
• Mounting Style: Through-Hole
• Lead Finish: Tin-plated for easy soldering
• Case Material: Molded Plastic (UL 94V-0 Rated)

Dimensions:

• Body Length: ≈ 19.05 mm
• Body Width: ≈ 6.35 mm
• Lead Pitch: 2.54 mm
• Row Spacing: 7.62 mm

Pinout and Wiring:

• Pin 1 & 13 (Discharge): Connects to the external capacitor to reset the timing cycle.
• Pin 2 & 12 (Threshold): Monitors the capacitor voltage to end the timing interval.
• Pin 3 & 11 (Control Voltage): Allows external control of the threshold and trigger levels.
• Pin 4 & 10 (Reset): Active-low input that resets the timer output; connect to V_CC if not used.
• Pin 5 & 9 (Output): The primary output pins capable of driving loads up to 200 mA.
• Pin 6 & 8 (Trigger): Initiates the timing cycle when the voltage drops below 1/3 V_CC.
• Pin 7 (GND): System ground connection.
• Pin 14 (V_CC): Positive supply voltage input.

Datasheet Reference:

• Download Texas Instruments NE556 Dual Precision Timer Datasheet

Commonly Used in:

• Sequential Timing Circuits: Designing systems where one event must trigger another after a specific delay.
• LED Flashers: Creating dual-rate flashing patterns or alternating light displays.
• Tone Generators: Producing audible frequencies for alarms, toys, or communication devices.

Applications:

• Pulse Width Modulation (PWM): Controlling the speed of DC motors or the brightness of LEDs efficiently.
• Missing Pulse Detection: Monitoring continuous pulse trains to detect interruptions in machinery or data lines.
• Time Delay Generation: Providing precise turn-on or turn-off delays for industrial control systems.
• Frequency Division: Reducing high-frequency signals into lower, manageable clock pulses.

Equivalent Models:

• LM556: A standard industry equivalent with identical pinout and electrical characteristics.
• SE556: The military-grade version designed for wider temperature ranges and harsher environments.
• ICM7556: A CMOS version that offers much lower power consumption and higher input impedance.

Package Includes:

• 1 x NE556-HLF-Dual precision Timer IC DIP-14