Overview
The NE556DRG4 is a dual precision timer integrated circuit produced by Texas Instruments. It is part of the 555 timer family and provides two independent timing circuits in a single package. This device is designed to operate in both astable and monostable modes, controlled by external resistor-capacitor (RC) timing networks. The NE556DRG4 is widely used in various timing and pulse generation applications due to its versatility and reliability.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | - | 16 | V |
| Operating Free-Air Temperature | -40 | - | 85 | °C |
| Output Current | - | - | ±200 | mA |
| Trigger Voltage Level (VCC = 15V) | 4.5 | 5 | 5.6 | V |
| Threshold Voltage Level (VCC = 15V) | 8.8 | 10 | 11.2 | 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 precision timing circuits per package, similar to the NA555, NE555, SA555, or SE555 type.
- Astable or monostable operation modes.
- TTL-compatible output that can sink or source up to 200mA.
- Active pullup or pulldown capability.
- External resistor-capacitor (RC) timing control with adjustable trigger and threshold levels.
- Reset input to initiate a new timing cycle.
- Low-impedance discharge path when output is low.
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 NE556DRG4?
The NE556DRG4 is a dual precision timer integrated circuit produced by Texas Instruments, providing two independent timing circuits in a single package.
- What are the operating modes of the NE556DRG4?
The NE556DRG4 can operate in both astable and monostable modes.
- What is the maximum output current of the NE556DRG4?
The NE556DRG4 can sink or source up to 200mA.
- How is the timing controlled in the NE556DRG4?
The timing is controlled by external resistor-capacitor (RC) networks with adjustable trigger and threshold levels.
- What is the purpose of the reset input in the NE556DRG4?
The reset input is used to initiate a new timing cycle by setting the output and discharge low.
- What are some common applications of the NE556DRG4?
Common applications include precision timers, pulse-shaping circuits, missing-pulse detectors, pulse-width modulators, and industrial controls.
- What is the operating temperature range of the NE556DRG4?
The operating temperature range is from -40°C to 85°C.
- What is the supply voltage range for the NE556DRG4?
The supply voltage range is from 4.5V to 16V.
- How does the NE556DRG4 handle electrostatic discharge (ESD)?
The NE556DRG4 has ESD ratings of ±500V for the human-body model (HBM) and ±1500V for the charged device model (CDM).
- What package types are available for the NE556DRG4?
The NE556DRG4 is available in 14-pin SOIC, SSOP, PDIP, and SOP packages.
