HT1380/HT1381   Serial Timekeeper Chip

Revision # 1.30   Modifications made on May 27, 2011

• The A.C. Characteristics section was modified.
  
• The Crystal Selection section was modified.
  
• The Application Circuits section was modified.

Revision # 1.20   Modifications made on April 1, 2011

• The A.C. Characteristics section was modified.
  
• The Crystal Selection section was modified.

Revision # 1.11   Modifications made on February 23, 2009

• The Package Information section was modified.
  
• The Product Tape and Reel Specifications section was modified.

Revision # 1.10   Modifications made on July 18, 2008

• In the Features section, the operating current at 2V value was modified.
  
• The Package Information section was added.
  
• The Product Tape and Reel Specifications section was added.

Revision # 1.00   This was posted on September 18, 2000