CY7C4221 / CY7C4231

Document Number: 38-06016 Rev. *H

Page 3 of 22

Contents

Pin Configuration ............................................................. 4

Pin Definitions .................................................................. 4

Architecture ...................................................................... 5

Resetting the FIFO ............................................................ 5

FIFO Operation ................................................................. 5

Programming .................................................................... 5

Programmable Flag (PAE, PAF) Operation ................ 6

Width Expansion Configuration ...................................... 7

Flag Operation .................................................................. 7

Full Flag ....................................................................... 7

Empty Flag .................................................................. 7

Maximum Ratings ............................................................. 8

Operating Range ............................................................... 8

Electrical Characteristics ................................................. 8

Capacitance ...................................................................... 8

AC Test Loads and Waveforms ....................................... 9

Switching Characteristics ................................................ 9

Switching Waveforms .................................................... 10

Typical AC and DC Characteristics .............................. 16

Ordering Information ...................................................... 17

1 K × 9 Synchronous FIFO ........................................ 17

2 K × 9 Synchronous FIFO ........................................ 17

Ordering Code Definitions ......................................... 17

Package Diagrams .......................................................... 18

Acronyms ........................................................................ 20

Document Conventions ................................................. 20

Units of Measure ....................................................... 20

Document History Page ................................................. 21

Sales, Solutions, and Legal Information ...................... 22

Worldwide Sales and Design Support ....................... 22

Products .................................................................... 22

PSoC Solutions ......................................................... 22