CY7C4205/CY7C4215

CY7C4225/CY7C4245

Document Number: 001-45652 Rev. *B

Page 3 of 25

Contents

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

Pin Definitions .................................................................. 5

Selection Guide ................................................................ 5

Architecture ...................................................................... 6

Resetting the FIFO ............................................................ 6

FIFO Operation ................................................................. 6

Programming .................................................................... 6

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

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

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

Programmable Almost Empty/Almost Full Flag ........... 7

Retransmit ......................................................................... 7

Width Expansion Configuration ...................................... 8

Depth Expansion Configuration ...................................... 8

Maximum Ratings ........................................................... 10

Operating Range ............................................................. 10

Electrical Characteristics ............................................... 10

Capacitance ..................................................................... 10

Switching Characteristics .............................................. 11

Switching Waveforms .................................................... 12

Ordering Information ...................................................... 21

256 x 18 Synchronous FIFO ..................................... 21

512 x 18 Synchronous FIFO ..................................... 21

1K x 18 Synchronous FIFO ....................................... 21

4K x 18 Synchronous FIFO ....................................... 21

Ordering Code Definitions ......................................... 21

Package Diagrams .......................................................... 22

Acronyms ........................................................................ 23

Document Conventions ................................................. 23

Units of Measure ....................................................... 23

Sales, Solutions, and Legal Information ...................... 25

Worldwide Sales and Design Support ....................... 25

Products .................................................................... 25

PSoC Solutions ......................................................... 25

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