Datasheet

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C INTERFACE TIMING REQUIREMENTS
RESET TIMING REQUIREMENTS
SWITCHING CHARACTERISTICS
TCA9539
www.ti.com
........................................................................................................................................... SCPS202A AUGUST 2009 REVISED SEPTEMBER 2009
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 11 )
MIN MAX UNIT
f
scl
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C clock frequency 0 400 kHz
t
sch
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C clock high time 0.6 µ s
t
scl
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C clock low time 1.3 µ s
t
sp
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C spike time 50 ns
t
sds
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C serial-data setup time 100 ns
t
sdh
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C serial-data hold time 0 ns
t
icr
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C input rise time 20 + 0.1C
b
(1)
300 ns
t
icf
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C input fall time 20 + 0.1C
b
(1)
300 ns
t
ocf
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C output fall time 10-pF to 400-pF bus 20 + 0.1C
b
(1)
300 ns
t
buf
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C bus free time between Stop and Start 1.3 µ s
t
sts
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C Start or repeated Start condition setup 0.6 µ s
t
sth
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C Start or repeated Start condition hold 0.6 µ s
t
sps
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C Stop condition setup 0.6 µ s
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 µ s
C
b
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C bus capacitive load 400 pF
(1) C
b
= total capacitance of one bus line in pF
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 14 )
MIN MAX UNIT
t
W
Reset pulse duration 6 ns
t
REC
Reset recovery time 0 ns
t
RESET
Time to reset 400 ns
over recommended operating free-air temperature range, C
L
100 pF (unless otherwise noted) (see Figure 12 and Figure 13 )
FROM TO
PARAMETER MIN MAX UNIT
(INPUT) (OUTPUT)
t
iv
Interrupt valid time P port INT 4 µ s
t
ir
Interrupt reset delay time SCL INT 4 µ s
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 µ s
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