DS1390 Maxim, DS1390 Datasheet - Page 26

• Manufacturer Part Number: DS1390
• Description: The low-voltage serial-peripheral interface (SPI™) DS1390/DS1391/DS1394 and the low-voltage 3-wire DS1392/DS1393 real-time clocks (RTCs) are clocks/calendars that provide hundredths of a second, seconds, minutes, hours, day, date, month, and ye
• Manufacturer: Maxim

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
26 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2009 Maxim Integrated Products
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
REVISION
NUMBER
0
1
2
3
REVISION
DATE
7/04
1/07
8/08
8/09
Initial release.
Added text to the General Description section to indicate that the bus interface is
disabled when the part switches to V
lead-free packages.
Added 0MHz (min) spec for SCLK frequency for SPI, 3-wire AC timing.
Added the “High Impedance” label for DOUT to Figure 1 and added DOUT trace to
Figure 2.
Changed all references of V
Replaced the Operation section with the Power Control section and added new Table 1.
Added the DS1394.
In the Address Map section, added the description on how to avoid misreads of the
time registers.
Added DS1390U-33/V+ to the Ordering Information table.
BAT
to V
BACKUP
DESCRIPTION
BACKUP
Maxim is a registered trademark of Maxim Integrated Products, Inc.
.
; replaced Ordering Information table with
Revision History
CHANGED
PAGES
11, 12
8, 10
3, 5
All
15
—
1
4
1