Timing Circuit
MC1455 MC1555
Specifications and Applications Information
I
4
TIMING CIRCUIT
The MC1555/MC1455 monolithic timing circui...
Description
MC1455 MC1555
Specifications and Applications Information
I
4
TIMING CIRCUIT
The MC1555/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 of operation, the 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.
q q q q q q
Direct Replacement Timing operates Adjustable
for NE555/SE555 Through
Timers Hours Modes
From Microseconds
in Both Astable and Monostable Duty Cycle
High Current Output Can Source or Sink 200 mA output Can Drive MTTL
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METAL PACKAGE CASE 601-04 1. 2. 3. 4. Ground Trigger output Reset 5. 6. 7. 8. Control Voltage Threshold Discharge Vcc
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1 (Top View)
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PI SUFFIX PLASTIC PACKAGE CASE 626-04 (MC1455P1 only)
U SUFFIX CERAMIC PACKAGE CASE 693-02
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D SUFFIX PLASTIC PACKAGE
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~ Threshold Control Voltage 5
Vcc
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