Overview
The NE556NSR, produced by Texas Instruments, is a dual precision timer integrated circuit. It is part of the NE556 family, which includes highly stable controllers capable of producing accurate time delays or oscillations. This device is designed for general-purpose timing applications and operates in both astable and monostable modes. The NE556NSR is packaged in a 14-pin SOP (Small Outline Package) and is suitable for a wide range of timing and control applications due to its versatility and precision.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | 16 | V | |
| Operating Free-Air Temperature | 0 | 70 | °C | |
| Output Current | ±200 | mA | ||
| Threshold Voltage Level (VCC = 15V) | 8.8 | 10 | 11.2 | V |
| Trigger Voltage Level (VCC = 15V) | 4.5 | 5 | 5.6 | V |
| Low-Level Output Voltage (VCC = 15V, IOL = 10mA) | 0.1 | 0.25 | V | |
| High-Level Output Voltage (VCC = 15V, IOH = -100mA) | 12.75 | 13.3 | V | |
| Output Pulse Rise Time (CL = 15pF, TA = 25°C) | 100 | 300 | ns | |
| Output Pulse Fall Time (CL = 15pF, TA = 25°C) | 100 | 300 | ns |
Key Features
- Two independent timing circuits per package, similar to the NA555, NE555, SA555, or SE555 type.
- Operates in both astable and monostable modes with external resistor-capacitor (RC) timing control.
- TTL-compatible output can source or sink up to 200 mA.
- Adjustable duty cycle and timing from microseconds to hours.
- Low turn-off time and maximum operating frequency greater than 500 kHz.
- Temperature stability of 0.005% per °C.
- Reset input overrides all other inputs for initiating a new timing cycle.
Applications
- Precision timers for various time intervals.
- Pulse-shaping circuits.
- Missing-pulse detectors.
- Pulse-width modulators and pulse-position modulators.
- Sequential timers and pulse generators.
- Frequency dividers and application timers.
- Industrial control systems.
Q & A
- What is the NE556NSR used for?
The NE556NSR is used for general-purpose timing applications, including precision timers, pulse-shaping circuits, and industrial control systems.
- What are the operating modes of the NE556NSR?
The NE556NSR operates in both astable and monostable modes.
- What is the maximum output current of the NE556NSR?
The output can source or sink up to 200 mA.
- What is the temperature range for the NE556NSR?
The operating free-air temperature range is from 0°C to 70°C.
- How is the timing interval controlled in the NE556NSR?
The timing interval is controlled by external resistor-capacitor (RC) networks.
- Can the duty cycle be adjusted in the NE556NSR?
- What is the maximum operating frequency of the NE556NSR?
The maximum operating frequency is greater than 500 kHz.
- Is the NE556NSR TTL-compatible?
- How does the reset input function in the NE556NSR?
The reset input overrides all other inputs to initiate a new timing cycle.
- What is the package type of the NE556NSR?
The NE556NSR is packaged in a 14-pin SOP (Small Outline Package).
