Datasheet

LTC4315
4
4315f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
ACC(IN, Z)
Allowable Leakage Current in
the Open State
V
CC
= V
CC2
= 5V
l
±5 µA
V
READY(OL)
READY Output Low Voltage I
READY
= 3mA, V
CC
= 5V
l
0.4 V
I
READY(OH)
READY Off Leakage Current V
CC
= V
READY
= 5V
l
0.1 ±5 µA
Stuck Low Timeout Circuitry
t
TIMEOUT
Bus Stuck Low Timer SDAOUT or SCLOUT < 0.3 • V
MIN
(Note 5)
l
35 45 55 ms
V
FAULT(OL)
FAULT Output Low voltage I
FAULT
= 3mA
l
0.4 V
I
FAULT(OH)
FAULT Off Leakage Current V
CC
= V
FAULT
= 5V
l
0.1 ±5 µA
I
2
C Interface Timing
f
SCL(MAX)
I
2
C Frequency Max
l
400 kHz
t
PDHL
SCL, SDA Fall Delay V
CC
= V
CC2
= V
DD(BUS)
= 5V, C
BUS
= 100pF,
R
BUS
= 10k (Note 7)
130 250 ns
t
f
SCL, SDA Fall Times V
CC
= V
CC2
= V
DD(BUS)
= 5V, C
BUS
= 100pF,
R
BUS
= 10k (Note 7)
20 300 ns
t
IDLE
Bus Idle Time
l
55 95 175 µs
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into pins are positive and all voltages are referenced
to GND unless otherwise indicated.
Note 3: The LTC4315 can level translate bus voltages ranging from
2.25V to 5.5V. In special cases, it can also level translate down to 1.4V.
See the Applications Information section for more details.
Note 4: Test performed with SDA, SCL buffers active.
Note 5: V
MIN
= minimum of V
CC
and V
CC2
if V
CC2
> 2.25V, otherwise
V
MIN
= V
CC
.
Note 6: V
IL
is tested for the following (V
CC
, V
CC2
) combinations;
(2.9V, 5.5V), (5.5V, 2.25V), (3.3V, 3.3V) and (5V, 0V).
Note 7: Guaranteed by design and not tested.
Note 8: Measured in a special DC mode with V
SDA,SCL
= V
RTA(TH)
+ 1V.
The transient I
RTA
during rising edges, when ACC is LOW, will depend on
the bus loading condition and the slew rate of the bus. The LTC4315’s
internal slew rate control circuitry limits the maximum bus rise rate to
75V/µs by controlling the transient I
RTA
.
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= V
CC2
= 3.3V unless otherwise noted.