MC1455D ,Timing Circuithttp://onsemi.comdelay mode, time is precisely controlled by one external resistor andcapacitor. Fo ..
MC1455D ,Timing Circuit
MC1455DR2 ,Timing CircuitOrder this document by MC1455/D* * *The MC1455 monolithic timing circuit is a highly stable control ..
MC1455DR2 ,Timing CircuitOrder this document by MC1455/D* * *The MC1455 monolithic timing circuit is a highly stable control ..
MC1455DR2 ,Timing CircuitOrder this document by MC1455/D* * *The MC1455 monolithic timing circuit is a highly stable control ..
MC1455DR2 ,Timing CircuitBlock Diagram75VCC+VCC Control0.01 μF DischargeVoltage8 MC14553Threshold5 kVS7 6 2.0 k6 OutputIDisc ..
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MC74AC253DR2 ,Dual 4 Input Multiplexer with 3 State Outputshigh impedance state with a HIGH on the respective Output Enable(OE) inputs, allowing the outputs t ..
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MC1455D
Timers
MC1455, MC1455B,
NCV1455B
Timers
The MC1455 monolithic timing circuit is a highly stable controller
capable of producing accurate time delays or oscillation. Additional
terminals are provided for triggering or resetting if desired. In the time
delay mode, time is precisely controlled by one external resistor and
capacitor. For astable operation as an oscillator, the free−running
frequency and the duty cycle are both accurately controlled with two
external resistors and one capacitor. The circuit may be triggered and
reset on falling waveforms, and the output structure can source or sink
up to 200 mA or drive MTTL circuits. Direct Replacement for NE555 Timers Timing from Microseconds through Hours Operates in Both Astable and Monostable Modes Adjustable Duty Cycle High Current Output Can Source or Sink 200 mA Output Can Drive MTTL Temperature Stability of 0.005% per °C Normally ON or Normally OFF Output
Figure 1. 22 Second Solid State Time Delay Relay Circuit10 k
0.1 �Ft = 1.1; R and C = 22 sec
Time delay (t) is variable by
changing R and C (see Figure 16).
VCC
Threshold
Control Voltage
Trigger
Gnd Reset
Discharge
Output
0.01 �F
Test circuit for measuring DC parameters (to set output and
measure parameters): When VS � 2/3 VCC, VO is low. When VS � When VO is low, Pin 7 sinks current. To test for Reset, set VO high, apply Reset voltage, and test for current flowing into Pin 7.
