ISL12029_10 Datasheet, PDF (6/30 Pages) Intersil Corporation – Real Time Clock/Calendar with I2C Bus™ and EEPROM

ISL12029, ISL12029A
Serial Interface (I²C) Specifications - DC/AC Characteristics (Continued)
SYMBOL
PARAMETER
CONDITIONS
MIN
MAX
(Note 16) TYP (Note 16) UNITS NOTES
t_HIGH Clock HIGH Time
Measured at the 70% of V_DD
600
ns
crossing.
t_SU:STA START Condition Setup Time
SCL rising edge to SDA falling
600
edge. Both crossing 70% of V_DD.
t_HD:STA START Condition Hold Time
From SDA falling edge crossing
600
30% of V_DD to SCL falling edge
crossing 70% of V_DD.
t_SU:DAT Input Data Setup Time
From SDA exiting the 30% to
100
70% of V_DD window, to SCL rising
edge crossing 30% of V_DD
t_HD:DAT Input Data Hold Time
From SCL falling edge crossing
0
70% of V_DD to SDA entering the
30% to 70% of V_DD window.
t_SU:STO STOP Condition Setup Time
From SCL rising edge crossing
600
70% of V_DD, to SDA rising edge
crossing 30% of V_DD.
t_HD:STO STOP Condition Hold Time for
From SDA rising edge to SCL
600
Read, or Volatile Only Write
falling edge. Both crossing 70%
of V_DD.
t_DH
Output Data Hold Time
From SCL falling edge crossing
0
30% of V_DD, until SDA enters the
30% to 70% of V_DD window.
Cpin SDA, and SCL Pin Capacitance
ns
ns
ns
ns
ns
ns
ns
10
pF
t_WC Non-Volatile Write Cycle Time
t_R
SDA and SCL Rise Time
From 30% to 70% of V_DD
12
20
20 +
250
0.1 x Cb
ms
14
ns
15
t_F
SDA and SCL Fall Time
From 70% to 30% of V_DD
20 +
0.1 x Cb
250
ns
15
Cb
Capacitive Loading of SDA or SCL Total on-chip and off-chip
10
400
pF
15
Rpu SDA and SCL Bus Pull-up Resistor Maximum is determined by t_R and
1
Off-chip
t_F.
For Cb = 400pF, max is about
2kΩ~2.5kΩ.
For Cb = 40pF, max is about
15kΩ~20kΩ
kΩ
15
NOTES:
7. IRQ/F_OUT Inactive (no frequency output and no alarms).
8. V_IL = V_DD x 0.1, V_IH = V_DD x 0.9, f_SCL = 400kHz.
9. V_RESET = 2.63V (VDD must be greater than V_RESET), VBAT = 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 I²C 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.
6
FN6206.9
August 12, 2010