8-BIT BIDIRECTIONAL BINARY COUNTER (3-STATE)

The MC74F579 is a fully synchronous 8-stage up/down counter with multiplexed 3-state I/O ports for bus-oriented applications. It features a preset capability for programmable operation, carry look-ahead for easy cascading and a U/D input to control the direction of counting. All state changes, except for the case of asynchronous reset, are initiated by the rising edge of the clock. TC output is not recommended for use as a clock or asynchronous reset due to the possibility of decoding spikes.

• Multiplexed 3-State I/O Ports For Bus-oriented Applications

• Built-In Cascading Carry Capability

• Count Frequency 115 MHz Typ

• Supply Current 100 mA Typ

• Fully Synchronous Operation

• U/D Pin to Control Direction of Counting

• Separate Pins for Master Reset and Synchronous Reset

• Center Power Pins to Reduce Effects of Package Inductance

• See F269 for 24-Pin Separate I/O Port Version

• See F779 for 16-Pin Version

• ESD Protection > 4000 Volts