DS1307 Maxim, DS1307 Datasheet - Page 3

• Manufacturer Part Number: DS1307
• Description: The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM
• Manufacturer: Maxim

AC ELECTRICAL CHARACTERISTICS
(V
SCL Clock Frequency
Bus Free Time Between a STOP and
START Condition
Hold Time (Repeated) START
Condition
LOW Period of SCL Clock
HIGH Period of SCL Clock
Setup Time for a Repeated START
Condition
Data Hold Time
Data Setup Time
Rise Time of Both SDA and SCL
Signals
Fall Time of Both SDA and SCL
Signals
Setup Time for STOP Condition
CAPACITANCE
(T
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Pin Capacitance (SDA, SCL)
Capacitance Load for Each Bus
Line
A
CC
= +25°C)
= 4.5V to 5.5V; T
PARAMETER
All voltages are referenced to ground.
Limits at -40°C are guaranteed by design and are not production tested.
I
After this period, the first clock pulse is generated.
A device must internally provide a hold time of at least 300ns for the SDA signal (referred to the V
signal) to bridge the undefined region of the falling edge of SCL.
The maximum t
C
PARAMETER
CCS
B
—total capacitance of one bus line in pF.
specified with V
A
HD:DAT
= 0°C to +70°C, T
CC
only has to be met if the device does not stretch the LOW period (t
= 5.0V and SDA, SCL = 5.0V.
SYMBOL
SYMBOL
t
t
t
t
t
HD:STA
SU:STA
HD:DAT
SU:DAT
SU:STO
t
t
f
t
C
HIGH
LOW
C
BUF
SCL
t
t
R
I/O
F
B
A
= -40°C to +85°C.)
(Note 4)
(Notes 5, 6)
(Note 7)
3 of 14
CONDITIONS
CONDITIONS
DS1307 64 x 8, Serial, I
MIN
MIN
250
4.7
4.0
4.7
4.0
4.7
4.7
0
0
TYP
TYP
LOW
) of the SCL signal.
2
C Real-Time Clock
MAX
1000
MAX
100
300
400
10
IH(MIN)
of the SCL
UNITS
UNITS
kHz
pF
pF
µs
µs
µs
µs
µs
µs
ns
ns
ns
µs