DS1678 Maxim, DS1678 Datasheet - Page 3

• Manufacturer Part Number: DS1678
• Description: The DS1678 real-time clock (RTC) event recorder records the time and date of a nonperiodic, asynchronous event each time the active-low INT pin is activated
• Manufacturer: Maxim

AC ELECTRICAL CHARACTERISTICS
(V
AC ELECTRICAL CHARACTERISTICS
(V
WARNING: Under no circumstances are negative undershoots of any amplitude allowed
when the device is in write protect.
Input Capacitance
Minimum Signal Width
Minimum Event Rate
SCL Clock Frequency
Bus Free Time Between a STOP and
START Condition
Hold Time (Repeated) START
Condition (Note 3)
LOW Period of SCL
HIGH Period of SCL
Setup Time for a Repeated START
Data Hold Time (Note 4)
Data Setup Time (Note 5)
Rise Time of Both SDA and SCL
Signals (Note 6)
Fall Time of Both SDA and SCL
Signals (Note 6)
Setup Time for STOP
Capacitive Load for Each Bus Line
(Note 6)
Input Capacitance (SCL, SDA)
CC
CC
= 2.6V to 5.5V or V
= 4.5V to 5.5V, T
PARAMETER SYMBOL
PARAMETER SYMBOL
A
= -40C to +85C.) (Note 1)
BAT
= 2.6V to 3.5V, T
t
t
t
t
t
t
t
HD:DAT
GLITCH
HD:STA
SU:DAT
SU:STA
SU:STO
EVENT
t
t
f
t
HIGH
LOW
C
BUF
C
SCL
C
t
t
R
F
B
I
I
A
= -40°C to +85°C.) (Note 1)
3 of 25
INT
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
CONDITIONS
CONDITIONS
20 + 0.1C
20 + 0.1C
20 + 0.1C
20 + 0.1C
0.122
0.854
MIN
MIN
100
100
250
1.3
4.7
0.6
4.0
1.3
4.7
0.6
4.0
0.6
4.7
0.6
4.0
0
0
TYP
TYP
B
B
B
B
10
5
MAX
0.245
MAX
1000
1.22
400
100
300
300
300
400
0.9
UNITS
UNITS
kHz
ms
ms
pF
pF
pF
s
s
s
s
s
s
ns
ns
ns
s