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PDF DS1307 Data sheet ( Hoja de datos )
| Número de pieza | DS1307 | |
| Descripción | 64 X 8 Serial Real Time Clock | |
| Fabricantes | TGS | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DS1307 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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TIGER ELECTRONIC CO.,LTD
DS1307
64 X 8 Serial Real Time Clock
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
Available in 8-pin DIP or SOIC
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)
PIN ASSIGNMENT
X1 l
8 VCC
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)
PIN DESCRIPTION
VCC
X1, X2
- Primary Power Supply
- 32.768 kHz Crystal Connection
VBAT
GND
- +3V Battery Input
- Ground
SDA
- Serial Data
SCL - Serial Clock
SQW/OUT - Square wave/Output Driver
DESCRIPTION
The DS1307 Serial Real Time Clock is a low power, full BCD clock/calendar plus 56 bytes of
nonvolatile SRAM. Address and data are transferred serially via a 2-wire bi-directional bus. The
clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the
month date is automatically adjusted for months with less than 31 days, including corrections for leap
year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The DS1307
has a built-in power sense circuit which detects power failures and automatically switches to the battery
supply.
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081800
Free Datasheet http://www.datasheet4u.com/
1 page  
DS1307
2-WIRE SERIAL DATA BUS
The DS1307 supports a bi-directional 2-wire bus and data transmission protocol. A device that sends
data onto the bus is defined as a transmitter and a device receiving data as a receiver. The device that
controls the message is called a master. The devices that are controlled by the master are referred to as
slaves. The bus must be controlled by a master device which generates the serial clock (SCL), controls
the bus access, and generates the START and STOP conditions. The DS1307 operates as a slave on the
2-wire bus. A typical bus configuration using this 2-wire protocol is show in Figure 4.
TYPICAL 2-WIRE BUS CONFIGURATION Figure 4
Figures 5, 6, and 7 detail how data is transferred on the 2-wire bus.
Data transfer may be initiated only when the bus is not busy.
During data transfer, the data line must remain stable whenever the clock line is HIGH. Changes in
the data line while the clock line is high will be interpreted as control signals.
Accordingly, the following bus conditions have been defined:
Bus not busy: Both data and clock lines remain HIGH.
Start data transfer: A change in the state of the data line, from HIGH to LOW, while the clock is HIGH,
defines a START condition.
Stop data transfer: A change in the state of the data line, from LOW to HIGH, while the clock line is
HIGH, defines the STOP condition.
Data valid: The state of the data line represents valid data when, after a START condition, the data line
is stable for the duration of the HIGH period of the clock signal. The data on the line must be changed
during the LOW period of the clock signal. There is one clock pulse per bit of data.
Each data transfer is initiated with a START condition and terminated with a STOP condition. The
number of data bytes transferred between START and STOP conditions is not limited, and is determined
by the master device. The information is transferred byte-wise and each receiver acknowledges with a
ninth bit. Within the 2-wire bus specifications a regular mode (100 kHz clock rate) and a fast mode
(400 kHz clock rate) are defined. The DS1307 operates in the regular mode (100 kHz) only.
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Free Datasheet http://www.datasheet4u.com/
5 Page 
DS1307Z 64 X 8 SERIAL REAL TIME CLOCK
8-PIN SOIC (150-MIL) MECHANICAL DIMENSIONS
PKG
8-PIN
(150 MIL)
DIM MIN MAX
A IN. 0.188 0.196
MM 4.78 4.98
B IN. 0.150 0.158
MM 3.81 4.01
C IN. 0.048 0.062
MM 1.22 1.57
E IN. 0.004 0.010
MM 0.10 0.25
F IN. 0.053 0.069
MM 1.35 1.75
G IN.
MM
0.050 BSC
1.27 BSC
H IN. 0.230 0.244
MM 5.84 6.20
J IN. 0.007 0.011
MM 0.18 0.28
K IN. 0.012 0.020
MM 0.30 0.51
L IN. 0.016 0.050
MM 0.41 1.27
phi 0°
8°
56-G2008-001
DS1307
11 of 11
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet DS1307.PDF ] | |
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