74F579 Datasheet | Fairchild Semiconductor

Description The 74F579 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 lookahead for easy cascading and a U/D input to control the direction of counting. All state changes, whether in counting or parallel loading, are initiated by the rising edge of the clock. Features s Multiplexed 3-STATE I/O ports s Built-in lookahead carry capability s Count frequency 100 MHz typical s Supply current 75 m A typical s Guaranteed 4000V minimum ESD protection Ordering Code: Order Number 74F579SC 74F579SJ 74F579PC Package Number M20B M20D N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” tot he ordering code. Logic Symbol Connection Diagram © 1999 Fairchild Semiconductor Corporation DS009568 .fairchildsemi. Unit Loading/Fan Out Pin Names I/O0- I/O7 PE U/D MR SR CEP CET CS OE CP TC Description Data Inputs or 3-STATE Outputs Parallel Enable Input (Active LOW) Up-Down Count Control Input Master Reset Input (Active LOW) Synchronous Reset Input (Active LOW) Count Enable Parallel Input (Active LOW) Count Enable Trickle Input (Active LOW) Chip Select Input Active (Active LOW) Output Enable Input (Active LOW) Clock Pulse Input (Active Rising Edge) Terminal Count Output (Active LOW) U.L. HIGH/LOW 3.5/0.333 75/15 0.25/0.333 0.25/0.333 0.25/0.333 0.25/0.333 0.25/0.333 0.25/0.333 0.25/0.333 0.25/0.333 0.25/0.333 25/12.5 Input IIH/IIL Output IOH/IOL 70 µA/- 0.2 m A - 3 m A/24 m A 5 µA/- 0.2 m A 5 µA/- 0.2 m A 5 µA/- 0.2 m A 5 µA/- 0.2 m A 5 µA/- 0.2 m A 5 µA/- 0.2 m A 5 µA/- 0.2 m A 5 µA/- 0.2 m A 5 µA/- 0.2 m A - 1 m A/5 m A Function Table MR X X X L H H H H H H SR X X X X L H H H H H CS H L L X X L PE X H H X X L...