Datasheet
PCF8574_PCF8574A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 5 — 27 May 2013 16 of 33
NXP Semiconductors
PCF8574; PCF8574A
Remote 8-bit I/O expander for I
2
C-bus with interrupt
13. Static characteristics
[1] The power-on reset circuit resets the I
2
C-bus logic at V
DD
<V
POR
and sets all I/Os to logic 1 (with current source to V
DD
).
Table 9. Static characteristics
V
DD
= 2.5 V to 6 V; V
SS
=0V; T
amb
=
40
C to +85
C; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
Supply
V
DD
supply voltage 2.5 - 6.0 V
I
DD
supply current operating mode; V
DD
= 6 V; no load;
V
I
=V
DD
or V
SS
; f
SCL
= 100 kHz
- 40 100 A
I
stb
standby current standby mode; V
DD
= 6 V; no load;
V
I
=V
DD
or V
SS
-2.510 A
V
POR
power-on reset voltage V
DD
=6V; noload; V
I
=V
DD
or V
SS
[1]
-1.32.4V
Input SCL; input/output SDA
V
IL
LOW-level input voltage 0.5 - +0.3V
DD
V
V
IH
HIGH-level input voltage 0.7V
DD
-V
DD
+0.5 V
I
OL
LOW-level output current V
OL
=0.4V 3 - - mA
I
L
leakage current V
I
=V
DD
or V
SS
1-+1 A
C
i
input capacitance V
I
=V
SS
--7 pF
I/Os; P0 to P7
V
IL
LOW-level input voltage 0.5 - +0.3V
DD
V
V
IH
HIGH-level input voltage 0.7V
DD
-V
DD
+0.5 V
I
IHL(max)
maximum allowed input current
through protection diode
V
I
V
DD
or V
I
V
SS
--400 A
I
OL
LOW-level output current V
OL
=1V; V
DD
=5V 10 25 - mA
I
OH
HIGH-level output current V
OH
=V
SS
30 - 300 A
I
trt(pu)
transient boosted pull-up current HIGH during acknowledge (see
Figure 8
); V
OH
=V
SS
; V
DD
=2.5V
- 1- mA
C
i
input capacitance - - 10 pF
C
o
output capacitance - - 10 pF
Interrupt INT
(see Figure 8)
I
OL
LOW-level output current V
OL
=0.4V 1.6 - - mA
I
L
leakage current V
I
=V
DD
or V
SS
1-+1 A
Select inputs A0, A1, A2
V
IL
LOW-level input voltage 0.5 - +0.3V
DD
V
V
IH
HIGH-level input voltage 0.7V
DD
-V
DD
+0.5 V
I
LI
input leakage current pin at V
DD
or V
SS
250 - +250 nA