SE555QS-13

The SE555Q is a precision timing circuit capable of producing accurate time delays or oscillations. In the time-delay or monostable mode of operation, the timing interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle can be independently controlled with two external resistors and one external capacitor. The threshold and trigger levels are normally two-thirds and one-third of VCC, respectively. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground. The output circuit is capable of sinking or sourcing up to 200mA of current. The supply voltage operating range is 5V to 15V. With a 5V supply, the output levels are compatible with TTL inputs.

Applications

• Automotive applications

Key features

• Timing range from microseconds to hours
• Astable or monostable operation
• Adjustable duty cycle
• TTL-compatible output, capable of sinking or sourcing up to 200mA
• Fully lead-free and fully RoHS compliant
• Halogen- and antimony-free, "green" device
• SE555Q for automotive applications requiring specific change control; AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities