TCA9548A_16 Datasheet, PDF (7/36 Pages) Texas Instruments – Low-Voltage 8-Channel I2C Switch with Reset

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TCA9548A
SCPS207F – MAY 2012 – REVISED NOVEMBER 2016
I²C Interface Timing Requirements (continued)
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 5)
MIN
t_vdL(Data)
t_vdH(Data)
Valid-data time (high to low)⁽²⁾
Valid-data time (low to high)⁽²⁾
SCL low to SDA output low valid
SCL low to SDA output high valid
t_vd(ack)
Valid-data time of ACK condition
ACK signal from SCL low
to SDA output low
C_b
I²C bus capacitive load
MAX
1
0.6
1
400
UNIT
μs
μs
μs
pF
6.7 Reset Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
t_W(L)
t_REC(STA)
Pulse duration, RESET low
Recovery time from RESET to start
MIN MAX UNIT
6
ns
0
ns
6.8 Switching Characteristics
over recommended operating free-air temperature range, C_L ≤ 100 pF (unless otherwise noted) (see Figure 5)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN
t_pd ⁽¹⁾ Propagation delay time
t_rst ⁽²⁾ RESET time (SDA clear)
R_ON = 20 Ω, C_L = 15 pF
R_ON = 20 Ω, C_L = 50 pF
SDA or SCL
RESET
SDn or SCn
SDA
MAX UNIT
0.3
ns
1
500 ns
(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) t_rst is the propagation delay measured from the time the RESET pin is first asserted low to the time the SDA pin is asserted high,
signaling a stop condition. It must be a minimum of t_WL.
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