TCA9555_16 Datasheet, PDF (8/46 Pages) Texas Instruments – Low-Voltage 16-Bit I2C and SMBus I/O Expander with Interrupt Output and Configuration Registers

TCA9555
SCPS200D – JULY 2009 – REVISED JULY 2016
I²C Interface Timing Requirements (continued)
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 19)
MIN
t_icf
I²C input fall time
20 × (V_CC /
5.5 V)
t_ocf
t_buf
t_sts
t_sth
t_sps
t_vd(data)
t_vd(ack)
C_b
I²C output fall time
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
Valid data time of ACK condition
I²C bus capacitive load
10-pF to 400-pF bus
SCL low to SDA output valid
ACK signal from SCL low to
SDA (out) low
20 × (V_CC /
5.5 V)
1.3
0.6
0.6
0.6
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MAX
300
UNIT
ns
300 ns
µs
µs
µs
µs
0.9 µs
0.9 µs
400 pF
7.7 Switching Characteristics
over recommended operating free-air temperature range, C_L ≤ 100 pF (unless otherwise noted) (see Figure 20 and Figure 21)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN MAX UNIT
t_iv
Interrupt valid time
t_ir
Interrupt reset delay time
t_pv
Output data valid; For V_CC = 2.3 V–5.5 V
Output data valid; For V_CC = 1.65 V–2.3 V
t_ps
Input data setup time
t_ph
Input data hold time
P port
SCL
SCL
P port
P port
INT
INT
P port
SCL
SCL
4 μs
4 μs
200 ns
300 ns
150
ns
1
μs
8
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