IDT1337
REA LTIME CLOCK WITH SERIAL INTERFACE
RTC
DC Electrical Characteristics
Unless stated otherwise, VCC = 1.3 V to 1.8 V, Ambient Temperature -40 to +85°C, Note 1
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
Timekeeper Current (Oscillator
Enabled)
I
Notes 5, 7, 8, 9
425
600
nA
CCTOSC
Data-Retention Current (Oscillator
Disabled)
I
Notes 5, 9
100
nA
CCTDDR
AC Electrical Characteristics
Unless stated otherwise, VCC = 1.8 V to 5.5 V, Ambient Temperature -40 to +85°C, Note 1
Parameter
Symbol
Conditions
Fast Mode
Min.
100
Typ. Max. Units
SCL Clock Frequency
f
400
100
kHz
µs
µs
µs
µs
µs
µs
ns
ns
ns
µs
pF
SCL
Standard Mode
Fast Mode
0
Bus Free Time Between a STOP and
START Condition
t
1.3
BUF
Standard Mode
Fast Mode
4.7
Hold Time (Repeated) START
Condition, Note 10
t
0.6
HD:STA
Standard Mode
Fast Mode
4.0
Low Period of SCL Clock
t
1.3
LOW
Standard Mode
Fast Mode
4.7
High Period of SCL Clock
t
0.6
HIGH
Standard Mode
Fast Mode
4.0
Setup Time for a Repeated START
Condition
t
0.6
SU:STA
HD:DAT
Standard Mode
Fast Mode
4.7
Data Hold Time, Notes 11, 12
t
0
0.9
Standard Mode
Fast Mode
0
Data Setup Time, Note 13
t
100
SU:DAT
Standard Mode
Fast Mode
250
Rise Time of Both SDA and SCL
Signals, Note 14
t
20 + 0.1C
20 + 0.1C
20 + 0.1C
20 + 0.1C
0.6
300
1000
300
R
B
B
B
B
Standard Mode
Fast Mode
Fall Time of Both SDA and SCL Signals,
Note 14
t
F
Standard Mode
Fast Mode
300
Setup Time for STOP Condition
t
SU:STO
Standard Mode
4.0
Capacitive Load for Each Bus Line,
Note 14
C
400
B
I/O Capacitance (SDA, SCL)
C
Note 15
10
pF
I/O
32.768 kHz Clock Accuracy with
External Crystal
TA=25°C
VCC=3.3 V
±10
ppm
2
IDT™ REAL-TIME CLOCK WITH I C SERIAL INTERFACE
13
IDT1337
REV H 120208
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
