TCA9546A Datasheet, PDF (8/31 Pages) Texas Instruments – Low Voltage 4-Channel I2C and SMBus Switch with Reset Function

TCA9546A
SCPS205A – APRIL 2014 – REVISED FEBRUARY 2015
8 Parameter Measurement Information
V_CC
SDn, SCn
DUT
R_L = 1 kΩ
C_L = 50 pF
(See Note A)
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I²C PORT LOAD CONFIGURATION
Stop
Condition
(P)
Start
Condition
(S)
Address
Bit 7
(MSB)
Address
Bit 6
BYTE
1
DESCRIPTION
I²C address + R/W
2
Control register data
Two Bytes for Complete
Device Programming
R/W
Address _{Bit 0}
Bit 1 _(LSB)
ACK
(A)
Data
Bit 7
(MSB)
Data
Bit 0
(LSB)
ACK
(A)
Stop
Condition
(P)
t_scl
t_sch
SCL
t_buf
SDA
t_icr
t_icf
t_icf
t_sth
Start or Repeat
Start Condition
t_icr
t_sds
t_vd(ACK)
or t_vdL
t_sts
t_sp
t_vdH
t_sdh
Repeat
Start
Condition
t_sps
Stop
Condition
0.7 × V_CC
0.3 × V_CC
0.7 × V_CC
0.3 × V_CC
VOLTAGE WAVEFORMS
A. C_L includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Z_O = 50 Ω,
t_r/t_f ≤ 30 ns.
C. The outputs are measured one at a time, with one transition per measurement.
Figure 5. I²C Interface Load Circuit, Byte Descriptions, and Voltage Waveforms
8
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