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TCA6408 数据表(PDF) 19 Page - Texas Instruments

部件名 TCA6408
功能描述  LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
PDF  31 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

TCA6408 数据表(HTML) 19 Page - Texas Instruments

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P0
A
SCL
P3
Unstable
Data
LastStableBit
SDA
WRITEMODE(R/
=0)
W
P0
A
SCL
P3
READMODE(R/
=1)
W
DUT
P PORTLOADCONFIGURATION
Pn
500 W
500 W
2
V
´ CCP
0.7
V
´ CCP
0.3
V
´ CCI
0.7
V
´ CCI
0.3 ´ VCCI
0.5 ´ VCCP
C =50pF
(seeNote A)
L
Slave
ACK
t
(seeNoteB)
pv
Pn
Pn
tps
tph
TCA6408
LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER
WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS
SCPS151C – FEBRUARY 2007 – REVISED JUNE 2007
PARAMETER MEASUREMENT INFORMATION (continued)
A.
CL includes probe and jig capacitance.
B.
tpv is measured from 0.7 × VCC on SCL to 50% I/O (Pn) output.
C.
All inputs are supplied by generators having the following characteristics: PRR
≤ 10 MHz, Z
O = 50 Ω, tr/tf ≤ 30 ns.
D.
The outputs are measured one at a time, with one transition per measurement.
E.
All parameters and waveforms are not applicable to all devices.
Figure 12. P Port Load Circuit and Timing Waveforms
19
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