Rainbow Electronics DS1305 User Manual
Ds1305 serial alarm real-time clock, Features, Ordering information
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FEATURES
§ Real-time clock (RTC) counts seconds,
minutes, hours, date of the month, month,
day of the week, and year with leap-year
compensation valid up to 2100
§ 96-byte, battery-backed NV RAM for data
storage
§ Two time-of-day alarms, programmable on
combination of seconds, minutes, hours, and
day of the week
§ Serial interface supports Motorola SPI
™
(serial peripheral interface) serial data ports
or standard 3-wire interface
§ Burst mode for reading/writing successive
addresses in clock/RAM
§ Dual-power supply pins for primary and
backup power supplies
§ Optional trickle charge output to backup
supply
§ 2.0V to 5.5V operation
§ Optional industrial temperature range:
-
40°C to +85°C
§ Available in space-efficient, 20-pin TSSOP
package
§ Underwriters Laboratory (UL) recognized
ORDERING INFORMATION
DS1305
16-Pin DIP (300mil)
DS1305N
16-Pin DIP (Industrial)
DS1305E
20-Pin TSSOP (173mil)
DS1305EN
20-Pin TSSOP (Industrial)
PIN ASSIGNMENT
V
CC2
1
20
V
CC1
V
BAT
2
19
NC
X1
3
18
PF
NC
4
17
V
CCIF
X2
5
16
SD0
NC
6
15
SDI
INT0
7
14
SCLK
NC
8
13
NC
INT1
9
12
CE
GND
10
11
SERMODE
DS1305
20-Pin TSSOP (4.4mm)
V
CC2
1
16 V
CC1
V
BAT
2
15
PF
X1
3
14
V
CCIF
X2
4
13
SDO
NC
5
12
SDI
INT0
6
11
SCLK
INT1
7
10
CE
GND
8
9
SERMODE
DS1305 16-Pin DIP (300mil)
TYPICAL OPERATING CIRCUIT
www.maxim-ic.com
DS1305
Serial Alarm Real-Time Clock
Package dimension information can be found at:
SPI is a trademark of Motorola, Inc.