TCA9555 Datasheet, PDF (15/32 Pages) Texas Instruments – LOW VOLTAGE 16-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT AND CONFIGURATION REGISTERS

TCA9555
www.ti.com .............................................................................................................................................................. SCPS200A – JULY 2009 – REVISED JULY 2009
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
I²C bus capacitive load
ACK signal from SCL low to SDA (out) low
MIN
0
0.6
1.3
100
0
20 + 0.1C_b
20 + 0.1C_b
20 + 0.1C_b
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
SWITCHING CHARACTERISTICS
over recommended operating free-air temperature range, C_L ≤ 100 pF (unless otherwise noted) (see Figure 12 and Figure 13)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN MAX UNIT
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
P port
SCL
SCL
P port
P port
INT
INT
P port
SCL
SCL
4 µs
4 µs
200 ns
150
ns
1
µs
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): TCA9555
Submit Documentation Feedback
15