pca9539 datasheet

PCA9539
www.ti.com SCPS130G –AUGUST 2005–REVISED JUNE 2014
6.5 I
2
C Interface Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 13)
MIN MAX UNIT
f
scl
I
2
C clock frequency 0 400 kHz
t
sch
I
2
C clock high time 0.6 μs
t
scl
I
2
C clock low time 1.3 μs
t
sp
I
2
C spike time 50 ns
t
sds
I
2
C serial-data setup time 100 ns
t
sdh
I
2
C serial-data hold time 0 ns
t
icr
I
2
C input rise time 20 + 0.1C
b
(1)
300 ns
t
icf
I
2
C input fall time 20 + 0.1C
b
(1)
300 ns
t
ocf
I
2
C output fall time 10-pF to 400-pF bus 20 + 0.1C
b
(1)
300 ns
t
buf
I
2
C bus free time between Stop and Start 1.3 μs
t
sts
I
2
C Start or repeated Start condition setup 0.6 μs
t
sth
I
2
C Start or repeated Start condition hold 0.6 μs
t
sps
I
2
C Stop condition setup 0.6 μs
t
vd(data)
Valid-data time SCL low to SDA output valid 50 ns
t
vd(ack)
Valid-data time of ACK condition ACK signal from SCL low to SDA (out) low 0.1 0.9 μs
C
b
I
2
C bus capacitive load 400 pF
(1) C
b
= total capacitance of one bus line in pF
6.6 RESET Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 16)
MIN MAX UNIT
t
W
Reset pulse duration 6 ns
t
REC
Reset recovery time 0 ns
t
RESET
Time to reset 400 ns
6.7 Switching Characteristics
over recommended operating free-air temperature range, C
L
≤ 100 pF (unless otherwise noted) (see Figure 14 and Figure 15)
FROM TO
PARAMETER MIN MAX UNIT
(INPUT) (OUTPUT)
t
iv
Interrupt valid time P port INT 4 μs
t
ir
Interrupt reset delay time SCL INT 4 μs
t
pv
Output data valid SCL P port 200 ns
t
ps
Input data setup time P port SCL 150 ns
t
ph
Input data hold time P port SCL 1 μs
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