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REMOTE 8-BIT I C AND SMBus LOW-POWER I/O EXPANDER
WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
2
SCPS139B – JANUARY 2006 – REVISED OCTOBER 2006
I
2
C Interface Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see
STANDARD MODE
I
2
C BUS
MIN
f
scl
t
sch
t
scl
t
sp
t
sds
t
sdh
t
icr
t
icf
t
ocf
t
buf
t
sts
t
sth
t
sps
t
vd(data)
t
vd(ack)
C
b
(1)
I
2
C
I
2
C
clock frequency
clock low time
0
4
4.7
50
250
0
1000
300
300
4.7
4.7
4
4
1
1
400
20 + 0.1C
b
100
0
20 + 0.1C
b (1)
(1)
FAST MODE
I
2
C BUS
MIN
0
0.6
1.3
50
MAX
400
UNIT
kHz
µs
µs
ns
ns
ns
300
300
300
ns
ns
ns
µs
µs
µs
µs
0.9
0.9
400
µs
µs
pF
MAX
100
I
2
C clock high time
I
2
C spike time
I
2
C serial data setup time
I
2
C serial data hold time
I
2
C input rise time
I
2
C
I
2
C
input fall time
bus free time between Stop and Start
I
2
C output fall time (10-pF to 400-pF bus)
I
2
C Start or repeater Start condition setup time
I
2
C Start or repeater Start condition hold time
I
2
C
Stop condition setup time
Valid data time; SCL low to SDA output valid
Valid data time of ACK condition; ACK signal from SCL low to
SDA (out) low
I
2
C bus capacitive load
C
b
= total capacitance of one bus line in pF
20 + 0.1C
b (1)
1.3
0.6
0.6
0.6
Reset Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see
STANDARD MODE
I
2
C BUS
MIN
t
W
t
REC
t
RESET
(1)
Reset pulse duration
Reset recovery time
Time to
reset
(1)
16
0
400
MAX
FAST MODE
I
2
C BUS
MIN
16
0
400
MAX
ns
ns
ns
UNIT
The PCA6107 requires a minimum of 400 ns to be reset.
Switching Characteristics
over recommended operating free-air temperature range (unless otherwise noted) (see
PARAMETER
t
iv
t
ir
t
pv
t
ps
t
ph
Interrupt valid time
Interrupt reset delay time
Output data valid
Input data setup time
Input data hold time
FROM
P port
SCL
SCL
SCL
P port
P port
TO
INT
INT
P0
P1–P7
SCL
SCL
0
200
STANDARD MODE
I
2
C BUS
MIN
MAX
4
4
250
200
0
200
FAST MODE
I
2
C BUS
MIN
MAX
4
4
250
200
µs
µs
ns
ns
ns
UNIT
13
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