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NE555P

Precision timer, 4.5-16V, 200mA output, astable/monostable, PDIP-8

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Manufacturer Part：

NE555P

Package：

PDIP-8 (9.81×6.35 mm, 2.54mm pitch, through-hole)

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Description

Product Overview

The NE555P from Texas Instruments is the industry-standard single precision timer IC. It can be configured in astable (oscillator) or monostable (one-shot) mode, generating time delays from microseconds to hours. Packaged in a PDIP-8 through-hole package, the NE555P operates from 4.5V to 16V and can source or sink up to 200 mA, making it one of the most versatile and widely used analog ICs in electronics.

Key Specifications

Supply Voltage Range 4.5V to 16V
Output Current 200 mA (source or sink)
Timing Range Microseconds to hours
Frequency (Astable) Up to 500 kHz
Initial Timing Accuracy 1% (typical)
Temperature Drift 50 ppm/°C (typical)
Trigger Voltage 1/3 VCC (typical)
Threshold Voltage 2/3 VCC (typical)
Reset Voltage 0.5V (max)
Operating Temperature 0°C to +70°C
Package PDIP-8

Features

  • Astable mode: free-running oscillator with adjustable duty cycle
  • Monostable mode: precision one-shot timer
  • High output current: 200 mA source/sink capability
  • Adjustable duty cycle from near-0% to near-100%
  • Active-low reset pin for timing interruption
  • Internal voltage divider sets 1/3 and 2/3 VCC thresholds
  • Wide supply range: 4.5V to 16V
  • Direct LED, relay, and speaker drive capability

Applications

  • Timer and delay circuits for industrial control
  • Pulse generation and clock sources
  • LED flasher and PWM dimmer circuits
  • Tone generator and alarm circuits
  • Power-up sequencing and watchdog timers

The NE555P from Texas Instruments is the iconic industry-standard precision timer IC. Configurable in astable (oscillator) or monostable (one-shot) mode, it generates accurate time delays from microseconds to hours. With 200 mA output drive capability, 4.5-16V supply range, and easy external component configuration, the NE555P remains one of the most versatile and widely used analog ICs for timing, oscillation, and pulse generation applications.

The NE555P contains two comparators, an SR flip-flop, a discharge transistor, and a resistive voltage divider (three 5kΩ resistors in series, hence the name). The voltage divider sets the upper comparator threshold at 2/3 VCC and the lower comparator trigger at 1/3 VCC. In monostable mode, a trigger pulse below 1/3 VCC sets the flip-flop, driving the output HIGH and turning off the discharge transistor. The timing capacitor charges through the external resistor until it reaches 2/3 VCC, which resets the flip-flop. In astable mode, the capacitor charges and discharges between 1/3 and 2/3 VCC continuously, producing a free-running oscillation.

Pin Name Type Function
1 GND Power Ground
2 TRIG Input Trigger (active below 1/3 VCC)
3 OUT Output Output (200 mA drive capability)
4 RESET Input Reset (active-low, overrides all other inputs)
5 CTRL I/O Control voltage (bypass with 0.01µF for noise immunity)
6 THRESH Input Threshold (active above 2/3 VCC)
7 DISCH Output Discharge (open collector, connects timing cap to GND)
8 VCC Power Supply voltage (4.5-16V)
  • Monostable timer circuits for delay and pulse-width generation
  • Astable oscillator for clock generation and PWM signals
  • LED flasher circuits with adjustable frequency and duty cycle
  • Tone and alarm generator circuits for audio alerting
  • Power-up delay and watchdog timer in embedded systems
Manufacturer Part Number Package Notes
TI NA555P PDIP-8 Higher temperature range version
TI SA555P PDIP-8 Automotive qualified version
TI LMC555CN PDIP-8 CMOS version, 1.5V-15V, low power
ON Semiconductor NE555P PDIP-8 Direct equivalent from onsemi
TI TLC555CP PDIP-8 CMOS version, 2MHz max, low power
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Contact Information

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Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Contact Information

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Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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