DS1308 Datasheet, PDF (1/14 Pages) Dallas Semiconductor – 64 X 8 Serial Real Time Clock

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FEATURES
Real time clock counts seconds, minutes,
hours, date of the month, month, day of the
week, and year with leap year compensation
valid up to 2100
56 byte nonvolatile RAM for data storage
2-wire serial interface
Programmable squarewave output signal
Automatic power-fail detect and switch
circuitry
Consumes less than 500 nA in battery backup
mode with oscillator running
Optional industrial temperature range
-40°C to +85°C (IND) available for DS1307
and DS1308
DS1307 available in 8-pin DIP or SOIC
DS1308 available in 36-pin SMD BGA (Ball
Grid Array)
DS1308 accuracy is better than ±2
minute/month at 25°C
Recognized by Underwriters Laboratory
ORDERING INFORMATION
DS1307
8-Pin DIP
DS1307Z
8-Pin SOIC (150 mil)
DS1307N
8-Pin DIP (Industrial)
DS1307ZN
8-Pin SOIC (Industrial)
DS1308
36-Pin BGA
DS1308N
36-Pin BGA (Industrial)
DS1307/DS1308
64 X 8 Serial Real Time Clock
PIN ASSIGNMENT
X1 ^l
8 V_CC
X2 ^{2 7} SQW/OUT
VBAT 3 6 _SCL
GND ^{4 5} SDA
DS1307 8-Pin DIP (300 mil)
X1 l
8 VCC
X2 2 7 SQW/OUT
VBAT _{3 6 SCL}
GND 4 5 SDA
DS1307Z 8-Pin SOIC (150 mil)
GND
VBAT
GND
SCL
GND
AB
CD
1
GND
2
VCC
3
4
SQW/
5
OUT
6
GND
7
8
SDA
9
GND
DS1308 36-Pin SMD BGA
(Top View)
PIN DESCRIPTION DS1307/DS1308
V_CC
X1, X2
- Primary Power Supply
- 32.768 kHz Crystal Connection
V_BAT
GND
- +3V Battery Input
- Ground
SDA
- Serial Data
SCL
- Serial Clock
SQW/OUT - Square wave/Output Driver
DS1308 PIN IDENTIFIER
V_CC
- C2, C3, D2, D3
V_BAT
- A4, A5, B4, B5
SDA
- C7, C8, D7, D8
SCL
- A7, A8, B7, B8
SQW/OUT - C4, C5, D4, D5
GND
- All Remaining Balls
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