PCA9539 Datasheet, PDF (15/34 Pages) NXP Semiconductors – 16-bit I2C and SMBus, low power I/O port with interrupt and reset

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PCA9539
REMOTE 16-BIT I²C AND SMBus LOW-POWER I/O EXPANDER
WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
SCPS130D – AUGUST 2005 – REVISED MARCH 2007
I²C Interface Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 11)
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
I²C clock frequency
I²C clock high time
I²C clock low time
I²C spike time
I²C serial-data setup time
I²C serial-data hold time
I²C input rise time
I²C input fall time
I²C output fall time
10-pF to 400-pF bus
I²C bus free time between Stop and Start
I²C Start or repeated Start condition setup
I²C Start or repeated Start condition hold
I²C Stop condition setup
Valid-data time
SCL low to SDA output valid
Valid-data time of ACK condition
ACK signal from SCL low to SDA (out) low
I²C bus capacitive load
MIN
0
0.6
1.3
100
0
20 + 0.1C_b(1)
20 + 0.1C_b(1)
20 + 0.1C_b(1)
1.3
0.6
0.6
0.6
50
0.1
MAX
400
50
300
300
300
0.9
400
UNIT
kHz
µs
µs
ns
ns
ns
ns
ns
ns
µs
µs
µs
µs
ns
µs
pF
(1) C_b = total capacitance of one bus line in pF
RESET Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 14)
MIN
t_W
Reset pulse duration
6
t_REC
Reset recovery time
0
t_RESET
Time to reset
400
MAX
UNIT
ns
ns
ns
Switching Characteristics
over recommended operating free-air temperature range, C_L ≤ 100 pF (unless otherwise noted) (see Figure 12 and
Figure 13)
PARAMETER
t_iv
Interrupt valid time
t_ir
Interrupt reset delay time
t_pv
Output data valid
t_ps
Input data setup time
t_ph
Input data hold time
FROM
(INPUT)
P port
SCL
SCL
P port
P port
TO
(OUTPUT)
INT
INT
P port
SCL
SCL
MIN
MAX
4
4
200
150
1
UNIT
µs
µs
ns
ns
µs
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