I wasn't sure where to put this, but since it affects so many of us I started a new thread for it.

GB

Product Change Notification Number: SC073701
Date: October 9, 2007
Title: AT89S8253 Design Revision

Product Identification:
Part Number ... Part Number ... Part Number
AT89S8253-24AC ... AT89S8253-24AI ... AT89S8253-24AU
AT89S8253-24JC ... AT89S8253-24JI ... AT89S8253-24JU
AT89S8253-24PC ... AT89S8253-24PI ... AT89S8253-24PU
AT89S8253-24PSC ... AT89S8253-24PSI ... AT89S8253-24PSU

Reason for Change: Design Processing Logistics
Manufacturing Location Quality/Reliability Material

Change Description:
The following improvements have been implemented:
1. Optimize the operation of the internal Pierce oscillator for a faster start-up time and
higher gain.
2. Decrease Icc current consumption in the Power-Down mode when the External Clock
mode is selected.
3. Improve synchronization timing of the SPI (Serial Peripheral Interface) communication
channel.

Identification Method to Distinguish Change:
The “R” character in the top line on the bottom-side marking was changed to “V”.

Qualification Data: will be available in December 2007
Samples: will be available in November 2007
Quantifiable Impact on Quality & Reliability: None
Proposed First Ship Date*: January 8, 2008