PCA9555
REMOTE 16-BIT I2C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS
www.ti.com
SCPS131D–AUGUST 2005–REVISED OCTOBER 2006
Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
II = –18 mA
VCC
2.3 V to 5.5 V
VPOR
MIN TYP(1)
MAX UNIT
VIK
Input diode clamp voltage
Power-on reset voltage
–1.2
1.5
1.8
2.6
4.1
1.7
2.5
4
V
VPOR
VI = VCC or GND, IO = 0
1.65
V
2.3 V
IOH = –8 mA
3 V
4.75 V
VOH
P-port high-level output voltage(2)
V
2.3 V
IOH = –10 mA
3 V
4.75 V
SDA
VOL = 0.4 V
VOL = 0.5 V
VOL = 0.7 V
VOL = 0.4 V
2.3 V to 5.5 V
2.3 V to 5.5 V
2.3 V to 5.5 V
2.3 V to 5.5 V
3
8
10
3
20
24
IOL
P port(3)
mA
INT
SCL, SDA
A2–A0
P port
P port
±1
±1
II
VI = VCC or GND
2.3 V to 5.5 V
µA
IIH
IIL
VI = VCC
2.3 V to 5.5 V
2.3 V to 5.5 V
5.5 V
1
µA
µA
VI = GND
–100
200
75
100
30
VI = VCC or GND, IO = 0,
I/O = inputs, fSCL = 400 kHz, No load
Operating mode
3.6 V
µA
mA
µA
2.7 V
20
50
5.5 V
1.1
0.7
0.5
0.5
0.4
0.25
1.5
1.3
1
VI = GND, IO = 0, I/O = inputs,
fSCL = 0 kHz, No load
ICC
Low inputs
Standby mode
3.6 V
2.7 V
5.5 V
1
VI = VCC, IO = 0, I/O = inputs,
fSCL = 0 kHz, No load
High inputs
3.6 V
0.9
0.8
2.7 V
Additional current in standby
mode
One input at VCC – 0.6 V,
Other inputs at VCC or GND
∆ICC
2.3 V to 5.5 V
2.3 V to 5.5 V
1.5
mA
pF
CI
SCL
VI = VCC or GND
3
3
7
7
SDA
P port
Cio
VIO = VCC or GND
2.3 V to 5.5 V
pF
3.7
9.5
(1) All typical values are at nominal supply voltage (2.5-V, 3.3-V, or 5-V VCC) and TA = 25°C.
(2) Each I/O must be externally limited to a maximum of 25 mA, and each octal (P07–P00 and P17–P10) must be limited to a maximum
current of 100 mA, for a device total of 200 mA.
(3) The total current sourced by all I/Os must be limited to 160 mA (80 mA for P07–P00 and 80 mA for P17–P10).
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