MC1455B Series

Timer Circuit

Catalog

Timer Circuit

Part	Package / Case	Package / Case [y]	Package / Case [x]	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Supplier Device Package	Voltage - Supply [Min]	Voltage - Supply [Max]	Type	Current - Supply	Package / Case	Package / Case
ON Semiconductor MC1455DR2G	8-SOIC	3.9 mm	0.154 in	70 °C	0 °C	Surface Mount	8-SOIC	4.5 V	16 V	555 Type Timer/Oscillator (Single)	10 mA
ON Semiconductor MC1455DG	8-SOIC	3.9 mm	0.154 in	70 °C	0 °C	Surface Mount	8-SOIC	4.5 V	16 V	555 Type Timer/Oscillator (Single)	10 mA
ON Semiconductor MC1455BP1	8-DIP					Through Hole	8-PDIP			555 Type Timer/Oscillator (Single)	10 mA	0.3 in	7.62 mm
ON Semiconductor MC1455P1G	8-DIP			70 °C	0 °C	Through Hole	8-PDIP	4.5 V	16 V	555 Type Timer/Oscillator (Single)	10 mA	0.3 in	7.62 mm
ON Semiconductor MC1455BDR2G	8-SOIC	3.9 mm	0.154 in	85 °C	-40 °C	Surface Mount	8-SOIC	4.5 V	16 V	555 Type Timer/Oscillator (Single)	10 mA

Catalog

Timer Circuit

Key Features

• 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 TTL

• Temperature Stability of 0.005% per °C

• Normally ON or Normally OFF Output

• Pb-Free Packages are Available

Description

The MC1455 monolithic timer 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 a stable 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 TTL circuits.