Datasheet
PCA6408A All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 1 — 27 September 2012 18 of 40
NXP Semiconductors
PCA6408A
Low-voltage, 8-bit I
2
C-bus and SMBus I/O expander
[1] For I
DD
, all typical values are at nominal supply voltage (1.8 V, 2.5 V, 3.3 V, 3.6 V or 5 V V
DD
) and T
amb
=25C. Except for I
DD
, the
typical values are at V
DD(P)
=V
DD(I2C-bus)
= 3.3 V and T
amb
=25C.
[2] The total current sourced by all I/Os must be limited to 80 mA.
[3] Each I/O must be externally limited to a maximum of 25 mA, for a device total of 200 mA.
[4] Typical value for T
amb
=25C. V
OL
= 0.4 V and V
DD
= 3.3 V. Typical value for V
DD
<2.5V, V
OL
=0.6V.
I
I
input current V
DD(P)
= 1.65 V to 5.5 V
SCL, SDA, RESET
; V
I
=V
DD(I2C-bus)
or V
SS
--1 A
ADDR; V
I
=V
DD(P)
or V
SS
--1 A
I
IH
HIGH-level input current P port; V
I
=V
DD(P)
; V
DD(P)
= 1.65 V to 5.5 V - - 1 A
I
IL
LOW-level input current P port; V
I
=V
SS
; V
DD(P)
= 1.65 V to 5.5 V - - 1 A
I
DD
supply current I
DD(I2C-bus)
+I
DD(P)
;
SDA, P port, ADDR, RESET;
V
I
on SDA and RESET =V
DD(I2C-bus)
or V
SS
;
V
I
on P port and ADDR = V
DD(P)
;
I
O
=0mA;I/O=inputs; f
SCL
= 400 kHz
V
DD(P)
= 3.6 V to 5.5 V - 10 25 A
V
DD(P)
= 2.3 V to 3.6 V - 6.5 15 A
V
DD(P)
= 1.65 V to 2.3 V - 4 9 A
I
DD(I2C-bus)
+I
DD(P)
;
SCL, SDA, P port, ADDR, RESET;
V
I
on SCL, SDA and RESET =V
DD(I2C-bus)
or V
SS
;
V
I
on P port and ADDR = V
DD(P)
;
I
O
=0mA;I/O=inputs; f
SCL
= 0 kHz
V
DD(P)
= 3.6 V to 5.5 V - 1.5 7 A
V
DD(P)
= 2.3 V to 3.6 V - 1 3.2 A
V
DD(P)
= 1.65 V to 2.3 V - 0.5 1.7 A
Active mode; I
DD(I2C-bus)
+I
DD(P)
;
P port, ADDR, RESET;
V
I
on RESET =V
DD(I2C-bus)
;
V
I
on P port and ADDR = V
DD(P)
;
I
O
=0mA;I/O=inputs;
f
SCL
= 400 kHz, continuous register read
V
DD(P)
= 3.6 V to 5.5 V - 60 125 A
V
DD(P)
= 2.3 V to 3.6 V - 40 75 A
V
DD(P)
= 1.65 V to 2.3 V - 20 45 A
I
DD
additional quiescent
supply current
SCL, SDA, RESET;
one input at V
DD(I2C-bus)
0.6 V,
other inputs at V
DD(I2C-bus)
or V
SS
;
V
DD(P)
=1.65Vto5.5V
--25A
P port, ADDR; one input at V
DD(P)
0.6 V,
other inputs at V
DD(P)
or V
SS
;
V
DD(P)
=1.65Vto5.5V
--80A
C
i
input capacitance V
I
=V
DD(I2C-bus)
or V
SS
; V
DD(P)
= 1.65 V to 5.5 V - 6 7 pF
C
io
input/output capacitance V
I/O
=V
DD(I2C-bus)
or V
SS
; V
DD(P)
=1.65Vto5.5V - 7 8 pF
V
I/O
=V
DD(P)
or V
SS
; V
DD(P)
= 1.65 V to 5.5 V - 7.5 8.5 pF
Table 15. Static characteristics …continued
T
amb
=
40
C to +85
C; V
DD(I2C-bus)
= 1.65 V to 5.5 V; unless otherwise specified.
Symbol Parameter Conditions Min Typ
[1]
Max Unit