NE555: Low-power single CMOS timer, SO8 package, 2.7MHz, +2V to +16V
STMicroelectronics

The TS555 is a low-power single CMOS timer offering significant improvements over the traditional NE555 timer in terms of power consumption and frequency capabilities. It operates with a very low typical supply current of 110 µA at 5V, which is significantly less compared to the NE555's 3 mA, making it an ideal choice for power-sensitive applications. Additionally, it boasts a high maximum astable frequency of 2.7 MHz, far exceeding the 0.1 MHz of its NE555 counterpart.

This CMOS timer maintains accurate timing in both monostable and astable modes, providing versatility in application. The high input impedance (1012Ω) allows for the use of smaller timing capacitors, further enhancing its suitability for compact, power-efficient designs. Moreover, the TS555 features reduced supply current spikes during output transitions, enabling the use of lower decoupling capacitors than those required by the bipolar NE555.

Key Specifications and Features

  • Supply Voltage (VCC): +2 V to +16 V
  • Typical Supply Current (@5V): 110 µA
  • Maximum Astable Frequency: 2.7 MHz
  • Input Impedance: 1012 Ω
  • Output Compatibility: TTL, CMOS, and logic MOS
  • Package: SO8 (plastic micropackage)
  • Operating Temperature Range: -40°C to +125°C

NE555 Datasheet

NE555 datasheet (PDF)

NE555 Substitutes
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Applications

  • Precision timing
  • Pulse generation
  • Time delay generation
  • Sequential timing

Category

Integrated Circuits (ICs)

General information

Integrated Circuits (ICs), particularly timers, are fundamental components in electronic engineering, offering a wide range of timing functions in various applications. Timers like the TS555 are used to generate accurate time delays or oscillation, essential in creating pulses, managing sequential events, and controlling the timing of operations in circuits.

When selecting a timer IC, engineers consider factors such as power consumption, operating voltage range, frequency capabilities, and package type. The TS555 stands out for its low power consumption and high frequency operation, making it suitable for power-sensitive and high-speed applications. Its compatibility with a wide voltage range (+2V to +16V) and various logic levels (TTL, CMOS, and MOS) further enhances its versatility.

The ability to operate in both monostable and astable modes adds to the flexibility of the TS555, allowing it to be used in a broad spectrum of applications from pulse generation to time delay creation. The choice of a timer IC should also take into account the ease of integration into the circuit, considering factors like input impedance and the required decoupling capacitors.

In summary, the TS555 offers an excellent balance of low power consumption, high frequency performance, and operational versatility, making it an attractive option for engineers designing power-efficient and precise timing solutions.

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