器件名称: NE555DRG3
功能描述: PRCISION TIMERS
文件大小: 713.51KB 共29页
简 介:NA555, NE555, SA555, SE555
www.ti.com SLFS022H – SEPTEMBER 1973 – REVISED JUNE 2010
PRECISION TIMERS
Check for Samples: NA555, NE555, SA555, SE555
1
FEATURES
Timing From Microseconds to Hours Astable or Monostable Operation
NA555...D OR P PACKAGE NE555...D, P, PS, OR PW PACKAGE SA555...D OR P PACKAGE SE555...D, JG, OR P PACKAGE (TOP VIEW)
Adjustable Duty Cycle TTL-Compatible Output Can Sink or Source up to 200 mA
SE555...FK PACKAGE (TOP VIEW)
GND TRIG OUT RESET
1 2 3 4
8 7 6 5
VCC DISCH THRES CONT
NC GND NC VCC NC
NC TRIG NC OUT NC
4 5 6 7 8 3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
NC DISCH NC THRES NC
NC – No internal connection
DESCRIPTION/ORDERING INFORMATION
These devices are precision timing circuits 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 r……
