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CAT9555WI-T1

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
CAT9555
http://onsemi.com
4
Table 4. D.C. OPERATING CHARACTERISTICS (V
CC
= 2.3V to 5.5V; V
SS
= 0 V; T
A
= −40°C to +85°C, unless otherwise specified.)
Symbol
Parameter Conditions Min Typ Max Unit
SUPPLIES
V
CC
Supply voltage 2.3 − 5.5 V
I
CC
Supply current Operating mode; V
CC
= 5.5 V;
no load; f
SCL
= 100 kHz
− 135 200
mA
I
stbl
Standby current Standby mode; V
CC
= 5.5 V; no load;
V
I
= V
SS
; f
SCL
= 0 kHz; I/O = inputs
− 1.1 1.5 mA
I
stbh
Standby current Standby mode; V
CC
= 5.5 V; no load;
V
I
= V
CC
; f
SCL
= 0 kHz; I/O = inputs
− 0.75 1
mA
V
POR
Power−on reset voltage No load; V
I
= V
CC
or V
SS
− 1.5 1.65 V
SCL, SDA, INT
V
IL
(Note 2)
Low level input voltage
−0.5 − 0.3 x V
CC
V
V
IH
(Note 2) High level input voltage 0.7 x V
CC
− 5.5 V
I
OL
Low level output current V
OL
= 0.4 V 3 − − mA
I
L
Leakage current V
I
= V
CC
= V
SS
−1 − +1
mA
C
I
(Note 3) Input capacitance V
I
= V
SS
− − 6 pF
C
O
(Note 3) Output capacitance V
O
= V
SS
− − 8 pF
A0, A1, A2
V
IL
(Note 2) Low level input voltage −0.5 − 0.3 x V
CC
V
V
IH
(Note 2) High level input voltage 0.7 x V
CC
− 5.5 V
I
LI
Input leakage current −1 − 1
mA
I/Os
V
IL
Low level input voltage −0.5 − 0.3 x V
CC
V
V
IH
High level input voltage 0.7 x V
CC
− 5.5 V
I
OL
Low level output current
V
OL
= 0.5 V;
V
CC
= 2.3 V to 5.5 V (Note 4)
8 8 to 20 −
mA
V
OL
= 0.7 V;
V
CC
= 2.3 V to 5.5 V (Note 4)
10 10 to 24 −
V
OH
High level output voltage
I
OH
= −8 mA; V
CC
= 2.3 V (Note 5) 1.8 − −
V
I
OH
= −10 mA; V
CC
= 2.3 V (Note 5) 1.7 − −
I
OH
= −8 mA; V
CC
= 3.0 V (Note 5) 2.6 − −
I
OH
= −10 mA; V
CC
= 3.0 V (Note 5) 2.5 − −
I
OH
= −8 mA; V
CC
= 4.75 V (Note 5) 4.1 − −
I
OH
= −10 mA; V
CC
= 4.75 V (Note 5) 4.0 − −
I
IH
Input leakage current V
CC
= 3.6 V; V
I
= V
CC
− − 1
mA
I
IL
Input leakage current V
CC
= 5.5 V; V
I
= V
SS
− − −100
mA
C
I
(Note 3) Input capacitance − − 5 pF
C
O
(Note 3) Output capacitance − − 8 pF
2. V
IL
min and V
IH
max are reference values only and are not tested.
3. This parameter is characterized initially and after a design or process change that affects the parameter. Not 100% tested.
4. Each I/Os must be externally limited to a maximum of 25 mA and each octal (I/O
0.0
to I/O
0.7
and I/O
1.0
to I/O
1.7
) must be limited to a maximum
current of 100 mA for a device total of 200 mA.
5. The total current sourced by all I/Os must be limited to 160 mA.
CAT9555
http://onsemi.com
5
Table 5. A.C. CHARACTERISTICS (V
CC
= 2.3 V to 5.5 V, T
A
= −40°C to +85°C, unless otherwise specified) (Note 6)
Symbol
Parameter
Standard I
2
C Fast I
2
C
Units
Min Max Min Max
F
SCL
Clock Frequency 100 400 kHz
t
HD:STA
START Condition Hold Time 4 0.6
ms
t
LOW
Low Period of SCL Clock 4.7 1.3
ms
t
HIGH
High Period of SCL Clock 4 0.6
ms
t
SU:STA
START Condition Setup Time 4.7 0.6
ms
t
HD:DAT
Data In Hold Time 0 0
ms
t
SU:DAT
Data In Setup Time 250 100 ns
t
R
(Note 7) SDA and SCL Rise Time 1000 300 ns
t
F
(Note 7) SDA and SCL Fall Time 300 300 ns
t
SU:STO
STOP Condition Setup Time 4 0.6
ms
t
BUF
(Note 7) Bus Free Time Between STOP and START 4.7 1.3
ms
t
AA
SCL Low to Data Out Valid 3.5 0.9
ms
t
DH
Data Out Hold Time 100 50 ns
T
i
(Note 7) Noise Pulse Filtered at SCL and SDA Inputs 100 100 ns
PORT TIMING
t
PV
Output Data Valid 200 ns
t
PS
Input Data Setup Time 100 ns
t
PH
Input Data Hold Time 1
ms
INTERRUPT TIMING
t
IV
Interrupt Valid 4
ms
t
IR
Interrupt Reset 4
ms
6. Test conditions according to “AC Test Conditions” table.
7. This parameter is characterized initially and after a design or process change that affects the parameter. Not 100% tested.
Table 6. A.C. TEST CONDITIONS
Input Rise and Fall time ≤ 10 ns
CMOS Input Voltages 0.2 V
CC
to 0.8 V
CC
CMOS Input Reference Voltages 0.3 V
CC
to 0.7 V
CC
Output Reference Voltages 0.5 V
CC
Output Load: SDA, INT Current Source: I
OL
= 3 mA; C
L
= 100 pF
Output Load: I/Os Current Source: I
OL
/I
OH
= 10 mA; C
L
= 50 pF
Figure 3. I
2
C Serial Interface Timing
SCL
SDA IN
SDA OUT
t
AA
t
SU:STA
t
HD:STA
t
HD:DAT
t
F
t
LOW
t
HIGH
t
LOW
t
R
t
SU:DAT
t
DH
t
BUF
t
SU:STO
CAT9555
http://onsemi.com
6
Pin Description
SCL: Serial Clock
The serial clock input clocks all data transferred into or out
of the device. The SCL line requires a pull−up resistor if it
is driven by an open drain output.
SDA: Serial Data/Address
The bidirectional serial data/address pin is used to transfer
all data into and out of the device. The SDA pin is an open
drain output and can be wire−ORed with other open drain or
open collector outputs. A pull−up resistor must be connected
from SDA line to V
CC
. The value of the pull−up resistor, R
P
,
can be calculated based on minimum and maximum values
from Figure 4 and Figure 5 (see Note).
A0, A1, A2: Device Address Inputs
These inputs are used for extended addressing capability.
The A0, A1, A2 pins should be hardwired to V
CC
or V
SS
.
When hardwired, up to eight CAT9555s may be addressed
on a single bus system. The levels on these inputs are
compared with corresponding bits, A2, A1, A0, from the
slave address byte.
I/O
0.0
to I/O
0.7
, I/O
1.0
to I/O
1.7
: Input / Output Ports
Any of these pins may be configured as input or output.
The simplified schematic of I/O
0
to I/O
7
is shown in
Figure 6. When an I/O is configured as an input, the Q1 and
Q2 output transistors are off creating a high impedance input
with a weak pull−up resistor (typical 100 kW). If the I/O pin
is configured as an output, the push−pull output stage is
enabled. Care should be taken if an external voltage is
applied to an I/O pin configured as an output due to the low
impedance paths that exist between the pin and either V
CC
or V
SS
.
Figure 4. Minimum R
P
as a Function of
Supply Voltage
Figure 5. Maximum R
P
Value vs.
Bus Capacitance
V
CC
(V) C
BUS
(pF)
4.84.44.03.63.22.82.42.0
0
0.5
1.0
1.5
2.0
2.5
400350300200150100500
0
1
2
3
4
6
7
8
R
Pmin
(KW)
R
Pmax
(KW)
5.2 5.6
I
OL
= 3 mA @ V
OLmax
250
5
Fast Mode I
2
C Bus /
tr max − 300 ns
NOTE: According to the Fast Mode I
2
C bus specification, for bus capacitance up to 200 pF, the pull up device can be a resistor. For bus
loads between 200 pF and 400 pF, the pull−up device can be a current source (Imax = 3 mA) or a switched resistor circuit.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

CAT9555WI-T1

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