DS1390U-3 Maxim Integrated Products, DS1390U-3 Datasheet - Page 5

• Manufacturer Part Number: DS1390U-3
• Description: Real Time Clock Low-Voltage SPI RTC with Trickle Charger
• Manufacturer: Maxim Integrated Products

Specifications of DS1390U-3

• Function: Clock, Calendar, Alarm, Trickle Charger
• Supply Voltage (max): 3.3 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial
• Package / Case: uSOP
• Time Format: HH:MM:SS:hh

Figure 2a. Timing Diagram—SPI Write Transfer (Mode 3)
Figure 2b. Timing Diagram—SPI Write Transfer (Mode 0)
CPHA = 1
CPHA = 0
SCLK
DOUT
SCLK
DOUT
NOTE: SCLK CAN BE EITHER POLARITY SHOWN FOR CPOL = 1.
DIN
DIN
NOTE: SCLK CAN BE EITHER POLARITY SHOWN FOR CPOL = 0.
CS
CS
t
DC
t
CC
t
CC
t
DC
W/R
W/R
t
CDH
t
CDH
t
t
CL
R
t
R
t
CL
Low-Voltage SPI/3-Wire RTCs with
WRITE ADDRESS BYTE
WRITE ADDRESS BYTE
_____________________________________________________________________
A6
A6
t
t
CH
CH
t
t
F
F
HIGH IMPEDANCE
HIGH IMPEDANCE
A0
A0
Trickle Charger
D7
D7
READ DATA BYTE
READ DATA BYTE
t
CCH
D0
D0
t
CWH
t
CWH
t
CCH
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