2024/4/12 18:26:12
189
FEATURES
• Two Precision Timing Circuits Per Package
• Astable or Monostable Operation
• TTL-Compatible Output Can Sink or Source to up 150 mA
• Active Pullup or Pulldown
• Designed to Be Interchangeable With Signetics NE556, SA556, and SE556
APPLICATIONS
• Precision Timers From Microseconds to Hours
• Pulse-Shaping Circuits
• Missing-Pulse Detectors
• Tone-Burst Generators
• Pulse-Width Modulators
• Pulse-Position Modulators
• Sequential Timers
• Pulse Generators
• Frequency Dividers
• Application Timers
• Industrial Controls
• Touch-Tone Encoders
DESCRIPTION/ORDERING INFORMATION
These devices provide two independent timing circuits of the NA555, NE555, SA555, or SE555 type in each package. These circuits can be operated in the astable or the monostable mode with external resistor-capacitor (RC) timing control. The basic timing provided by the RC time constant can be controlled actively by modulating the bias of the control-voltage input.
The threshold (THRES) and trigger (TRIG) levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by using the control voltage (CONT) terminal. When the trigger input falls below 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 the discharge (DISCH) terminal and ground (GND).
热门型号
热门资讯
20万现货SKU
品类不断扩充
科技智能大仓储
4小时快速交货
仅从原厂和代理商进货
每一颗料均可原厂追溯
明码标价节省时间成本
一站式采购正品元器件
工商网监