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TCA6408 Datasheet(PDF) 17 Page - Texas Instruments

Part # TCA6408
Description  LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
PDF  31 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TCA6408 Datasheet(HTML) 17 Page - Texas Instruments

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PARAMETER MEASUREMENT INFORMATION
SDA LOADCONFIGURATION
VCCI
R =1k
L
W
C =50pF
(seeNote A)
L
DUT
SDA
TwoBytesforREADInputPortRegister
(seeFigure9)
VOLTAGEWAVEFORMS
1
2
BYTE
DESCRIPTION
I Caddress
2
Inputregisterportdata
SCL
SDA
Stop
Condition
(P)
Start
Condition
(S)
Address
Bit7
(MSB)
Address
Bit1
R/
Bit0
(LSB)
W
ACK
(A)
Data
Bit7
(MSB)
Data
Bit0
(LSB)
Stop
Condition
(P)
0.7 ´ VCCI
0.3 ´ VCCI
RepeatStart
Condition
Stop
Condition
0.7 ´ VCCI
0.3 ´ VCCI
tscl
tsch
tsp
ticf
ticf
ticr
tsth
ticr
tsds
tsdh
tocf
tvd(ack)
tvd
tvd
tsts
tsps
tbuf
TCA6408
LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
SCPS151C – FEBRUARY 2007 – REVISED JUNE 2007
A.
CL includes probe and jig capacitance. tocf is measured with CL of 10 pF or 400 pF.
B.
All inputs are supplied by generators having the following characteristics: PRR
≤ 10 MHz, Z
O = 50 Ω, tr/tf ≤ 30 ns.
C.
All parameters and waveforms are not applicable to all devices.
Figure 10. I2C Interface Load Circuit and Voltage Waveforms
17
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