Overview
The SE555P, produced by Texas Instruments, is a precision timing circuit designed to generate accurate time delays or oscillations. This device is part of the 555 timer family but is specifically qualified for military and space applications, offering enhanced reliability and performance under extreme conditions. The SE555P operates within a military temperature range of -55°C to 125°C and is radiation-tolerant, making it suitable for critical and harsh environment applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 18 | V | |
| Operating Temperature Range | -55 | 125 | °C | |
| Output Current | ±200 | mA | ||
| Time Delay (Monostable) | 10.67 | 11.33 | ms (RT = 100 kΩ, CT = 0.1 μF) | |
| Capacitor Charge Time (Astable) | 11.30 | 15 | ms (RTA = RTB = 100 kΩ, CT = 0.1 μF) | |
| Capacitor Discharge Time (Astable) | 5.40 | 7.70 | ms (RTA = RTB = 100 kΩ, CT = 0.1 μF) | |
| Propagation Delay Time (Monostable) | 12 | ms (Threshold to Output) |
Key Features
- Timing from microseconds to hours
- Astable or monostable operation
- Adjustable duty cycle
- TTL-compatible output can sink or source up to 100 mA
- QML-V qualified, SMD 5962-98555
- Military temperature range (-55°C to 125°C)
- Radiation-tolerant: 25 kRad (Si) TID
Applications
The SE555P is versatile and can be used in various applications requiring precise timing, such as test equipment, sequential control circuits, and systems that need flexible waveform control. It is particularly suited for military, aerospace, and other harsh environment applications due to its radiation tolerance and wide operating temperature range.
Q & A
- What is the operating temperature range of the SE555P?
The SE555P operates within a temperature range of -55°C to 125°C. - What is the maximum supply voltage for the SE555P?
The maximum supply voltage for the SE555P is 18 V. - Is the SE555P radiation-tolerant?
Yes, the SE555P is radiation-tolerant with a typical value of 25 kRad (Si) TID. - What types of operations can the SE555P perform?
The SE555P can operate in both astable and monostable modes. - What is the maximum output current of the SE555P?
The SE555P can sink or source up to 200 mA. - Can the duty cycle of the SE555P be adjusted?
Yes, the duty cycle of the SE555P can be adjusted independently in astable mode. - What is the typical capacitor charge time for the SE555P in astable mode?
The typical capacitor charge time is around 11.30 ms to 15 ms (RTA = RTB = 100 kΩ, CT = 0.1 μF). - What is the propagation delay time for the SE555P in monostable mode?
The propagation delay time from threshold to output is approximately 12 ms. - Is the SE555P QML-V qualified?
Yes, the SE555P is QML-V qualified and meets the SMD 5962-98555 standards. - What are some common applications of the SE555P?
The SE555P is commonly used in test equipment, sequential control circuits, and other systems requiring precise timing and waveform control.
