Document Number: 38-06001 Rev. *K Page 20 of 22
Document History Page
Document Title: CY7C421, 512 × 9 Asynchronous FIFO
Document Number: 38-06001
Rev. ECN No.
Orig. of
Change
Submission
Date
Description of Change
** 106462 SZV 07/11/01 Change from Spec Number: 38-00079 to 38-06001
*A 122332 RBI 12/30/02 Updated Maximum Ratings:
Added Note 1 and referred the same note in “maximum ratings”.
*B 383597 PCX See ECN Added Pb-Free Logo.
Updated Ordering Information (Added the following MPNs:
CY7C419-10JXC, CY7C419-15JXC, CY7C419-15VXC, CY7C421-10JXC,
CY7C421-15AXC, CY7C421-20JXC, CY7C421-20VXC, CY7C425-10AXC,
CY7C425-10JXC, CY7C425-15JXC, CY7C425-20JXC, CY7C425-20VXC,
CY7C429-10AXC, CY7C429-15JXC, CY7C429-20JXC, CY7C433-10AXC,
CY7C433-10JXC, CY7C433-15JXC, CY7C433-20AXC, CY7C433-20JXC).
*C 2623658 VKN /
PYRS
12/17/08 Removed 26-pin CerDIP, 32-pin RLCC, 28-pin molded DIP packages related
information in all instances across the document.
Removed Military Temperature Range related Information in all instances
across the document.
Updated Ordering Information (Added MPN CY7C421-20JXI, removed MPNs
CY7C419/25/29/33).
*D 2714768 VKN /
AESA
06/04/2009 Updated Logic Block Diagram.
Updated Pin Configurations.
Updated Package Diagrams.
*E 2896039 RAME 03/19/2010 Added Contents.
Updated Ordering Information (Removed inactive parts from the data sheet).
Updated Package Diagrams.
Updated Sales, Solutions, and Legal Information (Updated links).
*F 3110157 ADMU 12/14/2010 Added Ordering Code Definitions under Ordering Information.
*G 3324980 ADMU 07/26/2011 Updated title to read as “CY7C421, 512 × 9 Asynchronous FIFO”.
Updated Features.
Updated Functional Description (Removed
CY7C420/424/425/428/429/432/433 related information).
Updated Selection Guide (Removed -10, -25, -30, -40 and -65 speed bins
related information).
Updated Electrical Characteristics (Removed -10, -25, -30, -40 and -65 speed
bins related information).
Updated Switching Characteristics (Removed -10, -25, -30, -40 and -65 speed
bins related information).
Updated Architecture (Removed CY7C420/424/425/428/429/432/433 related
information).
Updated Package Diagrams.
Added Acronyms and Units of Measure.
Updated to new template.
*H 3697624 SMCH 08/07/2012 Added Pin Definitions.
Updated Architecture (Updated Reading Data from the FIFO (Updated
description)).
*I 4082890 SMCH 07/31/2013 Updated Ordering Information (Updated part numbers).
Updated to new template.
Completing Sunset Review.
*J 4581652 SMCH 11/26/2014 Updated Functional Description:
Added “For a complete list of related documentation, click here
.” at the end.
