SE555-SP

SE555-SP www.ti.com QML CLASS V PRECISION TIMER Check for Samples: SE555-SP SGLS401 – FEBRUARY 2010 FEATURES 1 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) Rad-Tolerant: 25 kRad (Si) TID (1) (1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details. JG PACKAGE (TOP VIEW) GND TRIG OUT RESET 1 2 3 4 8 V CC 7 DISCH 6 THRES 5 CONT DESCRIPTION/ORDERING INFORMATION The SE555 is a precision timing circuit capable of producing accurate time delays or oscillation. In the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor. The threshold and trigger levels normally are two-thirds and one-third, respectively, of VCC. 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 ...