Datasheet 74HC590 - 5

link to page 5 link to page 5
NXP Semiconductors 74HC590 8-bit binary counter with output register; 3-state 6. Functional description Table 3. Function table[1] [2] Inputs Description OE CPR MRC CE CPC
H X X X X Q outputs disable L X X X X Q outputs enable X ↑ X X X counter data stored into register X ↓ X X X register stage is not changed X X L X X counter clear X X H L ↑ advance one count X X H L ↓ no count X X H H X no count [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; ↑ = LOW-to-HIGH transition; ↓ = HIGH-to-LOW transition. [2] RCO = Q0’ · Q1’ · Q2’ · Q3’ · Q4’ · Q5’ · Q6’ · Q7’ (Q0’ to Q7’ are internal outputs of the counter). 74HC590_2 © NXP B.V. 2009. All rights reserved.
Product data sheet Rev. 02 — 28 April 2009 5 of 21
Document Outline 1. General description 2. Features 3. Ordering information 4. Functional diagram 5. Pinning information 5.1 Pinning 5.2 Pin description 6. Functional description 7. Limiting values 8. Recommended operating conditions 9. Static characteristics 10. Dynamic characteristics 11. Waveforms 12. Package outline 13. Abbreviations 14. Revision history 15. Legal information 15.1 Data sheet status 15.2 Definitions 15.3 Disclaimers 15.4 Trademarks 16. Contact information 17. Contents