ISL12020 Datasheet, PDF (4/25 Pages) Intersil Corporation – Low Power RTC with VDD Battery Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Day Light Saving

ISL12020
I²C Interface Specifications Test Conditions: V_DD=+2.7 to +5.5V, Temperature = -20°C to +70°C, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
TYP
MIN
(Note 7) MAX UNITS NOTES
V_IL
SDA and SCL input buffer LOW
voltage
-0.3
0.3 x V_DD V
V_IH
SDA and SCL Input Buffer HIGH
Voltage
0.7 x V_DD
V_DD + 0.3 V
Hysteresis
SDA and SCL Input Buffer
Hysteresis
0.05 x V_DD
V
V_OL
SDA Output Buffer LOW Voltage, V_DD = 5V, I_OL = 3mA
Sinking 3mA
0.4
V
C_PIN
f_SCL
t_IN
SDA and SCL Pin Capacitance
SCL Frequency
T_A = +25°C, f = 1MHz,
V_DD = 5V, V_IN = 0V,
V_OUT = 0V
Pulse Width Suppression Time at Any pulse narrower than the
SDA and SCL Inputs
max spec is suppressed.
10
pF
400
kHz
50
ns
t_AA
SCL Falling Edge To SDA Output SCL falling edge crossing
Data Valid
30% of V_DD, until SDA exits
the 30% to 70% of V_DD
window.
900
ns
t_BUF
Time the Bus Must be Free Before SDA crossing 70% of V_DD
1300
ns
The Start of a New Transmission during a STOP condition, to
SDA crossing 70% of V_DD
during the following START
condition.
t_LOW
Clock LOW Time
Measured at the 30% of V_DD
1300
ns
crossing.
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
600
falling edge. Both crossing
70% of V_DD.
t_HD:STA
START Condition Hold Time
From SDA falling edge
600
crossing 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
0
crossing 30% 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
600
crossing 70% of V_DD, to SDA
rising edge crossing 30% of
V_DD.
t_HD:STO
STOP Condition Hold Time
From SDA rising edge to
600
SCL falling edge. Both
crossing 70% of V_DD.
ns
ns
ns
900
ns
ns
ns
4
FN6450.0
March 29, 2007