单精度定时器 - NE555

NE555 (正在供货)

单精度定时器

 

描述

These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or mono-stable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the a-stable 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 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 current up to 200 mA. Operation is specified for supplies of 5 V to 15 V. With a 5-V supply, output levels are compatible with TTL inputs.

特性

  • Timing From Microseconds to Hours
  • Astable or Monostable Operation
  • Adjustable Duty Cycle
  • TTL-Compatible Output Can Sink or Source
    Up to 200 mA
  • On Products Compliant to MIL-PRF-38535,
    All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include
    Testing of All Parameters.

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参数 与其它产品相比 定时器

 
Frequency (Max) (MHz)
VCC (Min) (V)
VCC (Max) (V)
Iq (Typ) (uA)
Features
Rating
Pin/Package
Operating Temperature Range (C)
NE555 LMC555 NA555 SA555 SE555 TLC555 TLC555-Q1
0.1    3    0.1    0.1    0.1    2.1    2.1   
4.5    1.5    4.5    4.5    4.5    2    2   
16    15    16    16    18    15    15   
2000    50    3000    2000    4000    250    170   
N/A    N/A    N/A    N/A    N/A    N/A    N/A   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Automotive   
8PDIP
8SO
8SOIC
8TSSOP   
8DSBGA
8PDIP
8SOIC
8VSSOP   
8PDIP
8SOIC   
8PDIP
8SOIC   
8PDIP
8SOIC   
14TSSOP
8PDIP
8SO
8SOIC   
8SOIC   
0 to 70    -40 to 125
-40 to 85   
-40 to 105    -40 to 85    -55 to 125    -40 to 125
-40 to 85
0 to 70   
-40 to 125   

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