DS1391U-18 Maxim Integrated Products, DS1391U-18 Datasheet - Page 22

• 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

Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
Figure 12. SPI Multiple-Byte Burst Transfer
Figure 13. 3-Wire Single-Byte Read
Figure 14. 3-Wire Single-Byte Write
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____________________________________________________________________
WRITE
READ
SCLK
SCLK
CE
I/O
CE
I/O
SCLK
DOUT
DIN
DIN
CS
A0
A0
A1
A1
HIGH-IMPEDANCE
A2
A2
ADDRESS
ADDRESS
A3
A3
BYTE
BYTE
A4
A4
A5
A5
DATA BYTE 0
BYTE 0
DATA
A6
A6
W/R
W/R
DATA BYTE 1
D0
D0
BYTE 1
DATA
D1
D1
D2
D2
D3
D3
DATA BYTE N
BYTE N
D4
D4
DATA
D5
D5
D6
D6
D7
D7