DS1391U-18 Maxim Integrated Products, DS1391U-18 Datasheet - Page 7

• Manufacturer Part Number: DS1391U-18
• Description: Real Time Clock Low-Voltage SPI RTC with Trickle Charger
• Manufacturer: Maxim Integrated Products

Specifications of DS1391U-18

• Function: Clock, Calendar, Alarm, Trickle Charger
• Supply Voltage (max): 1.89 V
• Supply Voltage (min): 1.71 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 3. Timing Diagram—3-Wire Read Transfer
Figure 4. Timing Diagram—3-Wire Write Transfer
SCLK
SCLK
I/O
I/O
CE
CE
t
t
DC
DC
t
CC
A0
A0
t
t
CDH
CDH
t
CC
t
CL
WRITE ADDRESS BYTE
t
R
WRITE ADDRESS BYTE
t
CL
Low-Voltage SPI/3-Wire RTCs with
A1
A1
t
R
t
_____________________________________________________________________
CH
t
CH
t
t
F
F
R/W
R/W
D0
t
CDD
WRITE DATA BYTE
READ DATA BYTE
Trickle Charger
D0
D7
t
CCH
t
CWH
t
CDZ
D7
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