IDT1338
REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM RTC
IDT®
REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 22
IDT1338 REV S 111214
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".
Q J. Chao 12/10/12 Updated orderable parts - added “G” to 16-pin SOIC parts with SRI/SRI8. New part numbers for
16-pin SOIC will read as SRGI and SRGI8.
R J. Chao 02/07/13 1. Changed the Vih Min value to 0.8Vcc and the Vil Max value to +0.2Vcc on page 11. This is based
on new data taken on TSMC samples (old data was from Fab 4).
2. The IBATDAT current on page 12 should change from 10nA to 120nA (Typ) and from 100nA to
300nA (Max) per latest Characterization data from TSMC.
R J. Chao 03/10/14 Changed tVCCF min value from 300µs to 3ms. Added associated note.
S RDW 11/12/14 Updated device markings.
