MAXIM ICM7240IWE+

The Maxim ICM7240/50/60 are programmable timer/counters and the Maxim ICM7242 is a fixed timer/counter. They require only 120μA of supply current, while generating delays from microseconds to days. Each device combines a counter with an internal oscillator whose period is controlled by an external resistor and capacitor. The oscillator can be inhibited and an external clock applied to the TB/O terminal. The programmable counters in the ICM7240/50/60 can be programmed using thumbwheel switches, jumpers, and analog switches. The ICM7240 has an 8 bit programmable counter and can generate time delays from 1 to 255 RC time constants. The ICM7250 has a two digit programmable BCD counter and can generate time delays from 1 to 99 RC time constants. The ICM7260 is used for "real time" applications and has a modulo 60 programmable divider, producing time delays from 1 to 59 RC time constants. The ICM7242 has an 8 bit fixed counter and can generate a time delay of 1 and 128 RC time constants. These four devices are easily cascaded and can operate in either a stable or monostable configurations, using the on-chip control flip-flop with Trigger and Reset inputs.

• Low Supply Current: 120μA
• Timing from μs to Days
• Shutdown Current less than 10μA
• Programmable Fixed Count
• Cascadable for Long Range Timing
• Monostable or Astable Operation
• Low Power CMos
• Synchronous High Speed Operation
• No False Clocking
• Increased Toggle Rate
• Supply Current Guaranteed Over Temperature
• Standby Current Less Than 10μA
• Significantly Improved ESD Protection

• ON/OFF Delay Timers
• Batch Timer/Sequencers
• Cycle Timers
• Programmable Timers
• Frequency Synthesizers
• Ultra-Long Time Delay Generators