ICM7225

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4 1/2 Digit, LCD, High-Speed Counter Decoder Driver

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • Improved 2nd Source! (See 3rd page for "Maxim AdvantageTM").
  • High Speed Up Counter: 25MHz Typ.
  • Leading Zero Blanking
  • Can Be Cascaded for 8 or More Digits
  • STORE and RESET Inputs for Frequency Counter Applications
  • On-Board Oscillator to Provide Backplane Frequency (ICM7224)
  • Brightness Control Input (ICM7225)
  • Low Power CMOS

The Maxim ICM7224(LCD) and ICM7225(LED) are high speed 4½ digit counters, featuring segment decoders, leading zero blanking, store and reset inputs, and a carry output that allows cascading of 8 or more digits. The ICM7224 directly drives a non-multiplexed liquid crystal display(LCD). The ICM7225 has 29 constant current outputs for driving a non-multiplexed common anode LED display.

These counters operate with inputs from DC to 25MHz while using only 10μA of supply current. A Schmitt trigger on the count input ensures reliable operation in noisy environments and in applications with slowly varying inputs.

The ICM7224 and ICM7225 are available in a 44 lead plastic chip carrier package in addition to the standard 40 lead plastic DIP.

APPLICATIONS

  • Unit Counter
  • Frequency Counter
  • Tachometer
  • Hour Meter
  • Totalizer
ICM7225
4 1/2 Digit, LCD, High-Speed Counter Decoder Driver
ICM7224, ICM7225: Pin Configuration
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Data Sheet 1

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