FM3130 Integrated RTC/Alarm with 64Kb FRAM
AC Parameters (TA = -40° C to + 85° C, VDD = 2.7V to 3.6V, CL = 100 pF unless otherwise specified)
Symbol Parameter Min Max Min Max Min Max Units Notes
fSCL
tLOW
tHIGH
tAA
SCL Clock Frequency
0
4.7
4.0
100
0
1.3
0.6
400
0
0.6
0.4
1000
kHz
µs
Clock Low Period
Clock High Period
SCL Low to SDA Data Out Valid
µs
3
0.9
0.55
µs
tBUF
Bus Free Before New Transmission
Start Condition Hold Time
Start Condition Setup for Repeated
Start
4.7
4.0
4.7
1.3
0.6
0.6
0.5
0.25
0.25
µs
µs
µs
tHD:STA
tSU:STA
tHD:DAT
tSU:DAT
tR
Data In Hold Time
0
250
0
100
0
100
ns
ns
ns
ns
µs
ns
ns
Data In Setup Time
Input Rise Time
1000
300
300
300
300
100
1
1
tF
Input Fall Time
tSU:STO
Stop Condition Setup Time
Data Output Hold (from SCL @ VIL)
Noise Suppression Time Constant
on SCL, SDA
4.0
0
0.6
0
0.25
0
tDH
tSP
50
50
50
All SCL specifications as well as start and stop conditions apply to both read and write operations.
Supervisor Timing (TA = -40° C to + 85° C, VDD = 2.7V to 3.6V)
Symbol
Parameter
Min
50
100
-
Max
Units
Notes
1,2
1,2
tVR
VDD Rise Time
VDD Fall Time
-
-
20
µs/V
µs/V
ms
tVF
tRPU
Device active after VDD>2.7V
Capacitance (TA = 25° C, f=1.0 MHz, VDD = 3.0V)
Symbol
Parameter
Input/Output Capacitance
X1, X2 Crystal pin Capacitance
Typ
-
25
Max
8
-
Units
pF
pF
Notes
1
1, 3
CIO
CXTL
Notes
1
2
3
This parameter is characterized but not tested.
Slope measured at any point on VDD waveform.
The crystal attached to the X1/X2 pins must be rated as 12.5pF.
Data Retention (TA = -40° C to + 85° C, VDD = 2.7V to 3.6V)
Parameter
Min
Units
Notes
Data Retention
10
Years
Rev. 1.0
Sept. 2006
Page 18 of 22
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