DS1306+ Maxim Integrated Products, DS1306+ Datasheet - Page 6

• Manufacturer Part Number: DS1306+
• Description: IC RTC SERIAL ALARM 16-DIP
• Manufacturer: Maxim Integrated Products
• Type: Clock/Calendar/Alarmr

Specifications of DS1306+

• Memory Size: 96B
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Function: Clock/Calendar/Alarm
• Rtc Memory Size: 96 Byte
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Rtc Bus Interface: Serial (3-Wire, SPI)
• Supply Current: 1.28 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 2. RTC REGISTERS AND ADDRESS MAP
Note: Range for alarm registers does not include mask’m’ bits.
The DS1306 can be run in either 12-hour or 24-hour mode. Bit 6 of the hours register is defined as the
12- or 24-hour mode select bit. When high, the 12-hour mode is selected. In the 12-hour mode, bit 5 is the
AM/PM bit with logic-high being PM. In the 24-hour mode, bit 5 is the second 10-hour bit (20 to 23
hours).
The DS1306 contains two time-of-day alarms. Time-of-day alarm 0 can be set by writing to registers 87h
to 8Ah. Time-of-day Alarm 1 can be set by writing to registers 8Bh to 8Eh. Bit 7 of each of the time-of-
day alarm registers are mask bits (Table 2). When all of the mask bits are logic 0, a time-of-day alarm
only occurs once per week when the values stored in timekeeping registers 00h to 03h match the values
stored in the time-of-day alarm registers. An alarm is generated every day when bit 7 of the day alarm
register is set to a logic 1. An alarm is generated every hour when bit 7 of the day and hour alarm
12h–1Fh
20h–7Fh
READ
HEX ADDRESS
0Ah
0Dh
0Bh
0Ch
0Eh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Fh
10h
11h
WRITE
A0h–
92h–
8Ah
8Bh
8Ch
8Dh
8Eh
8Fh
9Fh
FFh
80h
81h
82h
83h
84h
85h
86h
87h
88h
89h
90h
91h
Bit7 Bit6
M
M
M
M
M
M
M
M
0
0
0
0
0
0
12
24
12
24
12
24
0
0
0
0
0
10-MIN ALARM 0
10-SEC ALARM 0
10 MIN ALARM 1
10 SEC ALARM 1
10-YEAR
10
10
Bit5
A
A
P
0
P
0
10 MIN
10
10 SEC
A
P
0
10-MONTH
10-DATE
TRICKLE CHARGER REGISTER
10-HR
10-HR
10-HR
96-BYTES USER RAM
CONTROL REGISTER
Bit4
STATUS REGISTER
0
0
0
6 of 22
RESERVED
—
Bit3
0
0
0
HOUR ALARM 0
HOUR ALARM 1
MIN ALARM 0
MIN ALARM 1
SEC ALARM 0
SEC ALARM 1
Bit2
MONTH
HOURS
YEAR
DATE
DAY ALARM 0
DAY ALARM 1
MIN
SEC
DAY
Bit1
Bit0
01–12 + P/A
01–12 + P/A
01–12 + P/A
RANGE
00–59
00–59
00–23
01–07
01–12
00–99
00–59
00–59
00–23
01–07
00–59
00–59
00–23
01–07
1–31
—
—
—
—
—