6
FN8232.8
August 12, 2010
t
SU:STA
START Condition Set-up Time SCL rising edge to SDA falling edge.
Both crossing 70% of V
DD
.
600 ns
t
HD:STA
START Condition Hold Time From SDA falling edge crossing 30%
of V
DD
to SCL falling edge crossing
70% of V
DD
.
600 ns
t
SU:DAT
Input Data Set-up Time From SDA exiting the 30% to 70% of
V
DD
window, to SCL rising edge
crossing 30% of V
DD
.
100 ns
t
HD:DAT
Input Data Hold Time From SCL falling edge crossing 70% of
V
DD
to SDA entering the 30% to 70%
of V
DD
window.
0ns
t
SU:STO
STOP Condition Set-up Time From SCL rising edge crossing 70% of
V
DD
, to SDA rising edge crossing 30%
of V
DD
.
600 ns
t
HD:STO
STOP Condition Hold Time for
Read, or Volatile Only Write
From SDA rising edge to SCL falling
edge. Both crossing 70% of V
DD
.
600 ns
t
DH
Output Data Hold Time From SCL falling edge crossing 30% of
V
DD
, until SDA enters the 30% to 70%
of V
DD
window.
0ns
t
R
SDA and SCL Rise Time From 30% to 70% of V
DD
20 +
0.1xCb
250 ns
t
F
SDA and SCL Fall Time From 70% to 30% of V
DD
20 +
0.1xCb
250 ns
Cpin SDA, and SCL Pin Capacitance 10 pF
t
WC
Non-Volatile Write Cycle Time 12 20 ms 14
t
R
SDA and SCL Rise Time From 30% to 70% of V
DD
20 +
0.1xCb
250 ns 15
t
F
SDA and SCL Fall Time From 70% to 30% of V
DD
20 +
0.1xCb
250 ns 15
Cb Capacitive Loading of SDA or SCL Total on-chip and off-chip 10 400 pF 15
R
PU
SDA and SCL Bus Pull-up Resistor
Off-chip
Maximum is determined by t
R
and t
F
.
For Cb = 400pF, max is about
2kΩ~2.5kΩ.
For Cb = 40pF, max is about
15kΩ~20kΩ
1kΩ 15
NOTES:
7. RESET
Inactive (no reset).
8. V
IL
= V
DD
x 0.1, V
IH
= V
DD
x 0.9, f
SCL
= 400kHz.
9. V
RESET
= 2.63V (V
DD
must be greater than V
RESET
), V
BAT
= 0V.
10. Bit BSW = 0 (Standard Mode), ATR = 00h, V
BAT
≥1.8V.
11. Specified at +25°C.
12. In order to ensure proper timekeeping, the V
DD SR-
specification must be followed.
13. Parameter is not 100% tested.
14. t
WC
is the minimum cycle time to be allowed for any non-volatile Write by the user, it is the time from valid STOP condition at the end of Write
sequence of a serial interface Write operation, to the end of the self-timed internal non-volatile write cycle.
15. These are I
2
C specific parameters and are not directly tested, however they are used during device testing to validate device specification.
16. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by
characterization and are not production tested.
Serial Interface (I
2
C) Specifications (Continued)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS NOTES
ISL12027, ISL12027A
