Overview
The NE556DRE4 is a dual precision timer integrated circuit (IC) manufactured by Texas Instruments. This device provides two independent timing circuits, each similar to the single-timer NE555 or SE555, but integrated into a single package. It operates in both astable and monostable modes, offering high accuracy and versatility in timing applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 16 | V | |
| Operating Temperature (TA) | -40 | 85 | °C | |
| Output Current (IO) | ±200 | mA | ||
| Trigger Voltage Level (VTRIG) | 4.5 | 5 | 5.6 | V (at VCC = 15V) |
| Threshold Voltage Level (VT) | 8.8 | 10 | 11.2 | V (at VCC = 15V) |
| Reset Voltage Level (VRESET) | 0.3 | 0.7 | 1 | V |
| Output Pulse Rise Time (tr) | 100 | 300 | ns (CL = 15pF, TA = 25°C) | |
| Output Pulse Fall Time (tf) | 100 | 300 | ns (CL = 15pF, TA = 25°C) |
Key Features
- Two independent timing circuits per package, similar to the NE555 or SE555.
- Astable or monostable operation modes.
- TTL-compatible output can sink or source up to 200mA.
- Active pullup or pulldown capability.
- High accuracy and stability in timing intervals.
- Wide operating temperature range: -40°C to +85°C.
- External resistor-capacitor (RC) timing control with adjustable thresholds via the control voltage pin.
Applications
- Precision timers from microseconds to hours.
- Pulse-shaping circuits.
- Missing-pulse detectors.
- Pulse-width modulators.
- Pulse-position modulators.
- Sequential timers.
- Pulse generators.
- Frequency dividers.
- Application timers.
- Industrial controls.
Q & A
- What is the NE556DRE4?
The NE556DRE4 is a dual precision timer IC that combines two independent timing circuits in a single package. - What are the operating modes of the NE556DRE4?
The NE556DRE4 operates in both astable and monostable modes. - What is the output current capability of the NE556DRE4?
The output can sink or source up to 200mA. - What is the temperature range for the NE556DRE4?
The operating temperature range is -40°C to +85°C. - How is the timing interval controlled in the NE556DRE4?
The timing interval is controlled by external resistor-capacitor (RC) circuits, with adjustable thresholds via the control voltage pin. - What are some common applications of the NE556DRE4?
Common applications include precision timers, pulse-shaping circuits, missing-pulse detectors, pulse-width modulators, and industrial controls. - What is the supply voltage range for the NE556DRE4?
The supply voltage range is 4.5V to 16V. - How many pins does the NE556DRE4 have?
The NE556DRE4 has 14 pins. - What are the typical output pulse rise and fall times for the NE556DRE4?
The output pulse rise and fall times are typically 100 to 300 ns (CL = 15pF, TA = 25°C). - Can the NE556DRE4 be used in safety-critical applications?
No, it is not recommended for use in safety-critical applications without proper evaluation and validation.
