General Purpose Timers

The ICM7555 and ICM7556 are CMOS RC timers providing significantly improved performance over the standard SE/NE 555/6 and 355 timers, while at the same time being direct replacements for those devices in most applications.

Features

• Exact Equivalent in Most Cases for SE/NE555/556 or TLC555/556

• Low Supply Current

- ICM7555 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60μA

- ICM7556 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120μA

• Extremely Low Input Currents . . . . . . . . . . . . . . . . . 20pA

• High Speed Operation . . . . . . . . . . . . . . . . . . . . . . . 1MHz

• Guaranteed Supply Voltage Range . . . . . . . . . 2V to 18V

• Temperature Stability . . . . . . . . . . . . 0.005/°C at +25°C

• Normal Reset Function - No Crowbarring of Supply During Output Transition

• Can be Used with Higher Impedance Timing Elements than Regular 555/6 for Longer RC Time Constants

• Timing from Microseconds through Hours

• Operates in Both Astable and Monostable Modes

• Adjustable Duty Cycle

• High Output Source/Sink Driver can Drive TTL/CMOS

• Outputs have Very Low Offsets, HI and LO

• Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

• Precision Timing

• Pulse Generation

• Sequential Timing

• Time Delay Generation

• Pulse Width Modulation

• Pulse Position Modulation

• Missing Pulse Detector