IDT1338
REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM RTC
IDT®
REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 22
IDT1338 REV P 092012
Revision History
Rev. Originator Date Description of Change
A J. Sarma 01/29/08 New device. Preliminary release.
B J.Sarma 03/28/08 Added new note to Part Ordering information pertaining to RoHS compliance and Pb-free devices.
C J.Sarma 04/03/04 combined -3 and -33 parts to -31
D J.Sarma 05/19/08 The part number for 16pin RoHS complaint part has now changed from IDT1338C-31SOGI to
IDT1338C-31SRI and the IDT1338C-18SOGI changed to IDT1338C-18SRI
E J.Sarma 10/29/08
F J.Sarma 11/10/08 Updated Block Diagram; Typical Operating Characteristics charts.
G J.Sarma 11/13/08 Updated graphs in “Typical Operating Characteristics; added “Typical Operating Circuit” diagram
H J.Sarma 11/18/08 Updated graphs in “Typical Operating Characteristics; updated Block Diagram; added “Battery
Backed” to device title.
I J.Sarma 12/02/08 Updated Typical Operating Characteristics graphs; added marking diagrams.
J 11/10/09 Added “Handling, PCB Layout, and Assembly” section.
K S.S. 03/29/10 Added “Timeout” paragraph on page 8.
L L Larsen 04/13/11 Updated Supply Current speficiations
M S.S. 09/22/11 Changed “
V
CC
Fall Time; V
PF(MAX)
to V
PF(MIN)
” spec from 300 µs Min. to 1ms Min. (Table
2, “Power-Up/Down Characteristics)
N S.S. 10/17/11 Added separate item for tVCCF in “Power-up/Down Conditions” table for 1338-31; 300 µs min.
P J. Chao 09/20/12 1. Moved all from Fab4 to TSMC. QA requested change in the marking of only the 16-pin SOIC
device with internal crystal to add "A" due to the fact that TSMC uses a different crystal than Fab4.
Notification of a change in orderables was initiated with PCN A1208-06.
2. Updated 16-pin SOIC marking diagram and ordering information to include "A".
