TCA9543A_15 Datasheet, PDF (7/32 Pages) Texas Instruments – TCA9543A Low Voltage 2-Channel I2C Bus Switch With Interrupt Logic And Reset

www.ti.com
TCA9543A
SCPS206A – MARCH 2014 – REVISED FEBRUARY 2015
7.7 Switching Characteristics
over recommended operating free-air temperature range, C_L ≤ 100 pF (unless otherwise noted) (see Figure 7)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN MAX
UNIT
t_pd ⁽¹⁾
t_iv
t_ir
Propagation delay time
Interrupt valid time⁽²⁾
Interrupt reset delay time⁽²⁾
R_ON = 20 Ω, C_L = 15 pF
R_ON = 20 Ω, C_L = 50 pF
SDA or SCL
INTn
INTn
SDn or SCn
INT
INT
0.3
ns
1
4 μs
2 μs
(1) The propagation delay is the calculated RC time constant of the typical ON-state resistance of the switch and the specified load
capacitance, when driven by an ideal voltage source (zero output impedance).
(2) Data taken using a 4.7-kΩ pullup resistor and 100-pF load (see Figure 7)
7.8 Interrupt and Reset Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 7)
t_PWRL
t_PWRH
t_WL
t_rst ⁽²⁾
t_REC
PARAMETER
Required low-level pulse duration of INTn inputs⁽¹⁾
Required high-level pulse duration of INTn inputs⁽¹⁾
Pulse duration, RESET low
RESET time (SDA clear)
Recovery time from RESET to start
MIN MAX UNIT
1
μs
0.5
μs
4
ns
500 ns
0
ns
(1) The device has interrupt input rejection circuitry for pulses less than the listed minimum.
(2) t_rst is the propagation delay measured from the time the RESET terminal is first asserted low to the time the SDA terminal is asserted
high, signaling a stop condition. It must be a minimum of t_WL.
Copyright © 2014–2015, Texas Instruments Incorporated
Product Folder Links: TCA9543A
Submit Documentation Feedback
7