Datasheet

22
I/OPort
Shift
Register
16Bits
Input
Filter
23
Power-On
Reset
ReadPulse
WritePulse
21
24
12
GND
V
CCP
SDA
SCL
ADDR
I CBus
Control
2
RESET
3
INT
Interrupt
Logic
LP Filter
1
V
CCI
2
P17–P10
P07–P00
TCA6416A
SCPS194A –MAY 2009–REVISED NOVEMBER 2009 www.ti.com
Voltage Translation
Table 3 shows how to set up V
CC
levels for the necessary voltage translation between the I
2
C bus and the
TCA6416A.
Table 3. Voltage Translation
V
CCI
(SDA AND SCL OF I
2
C MASTER) V
CCP
(P PORT)
(V) (V)
1.8 1.8
1.8 2.5
1.8 3.3
1.8 5
2.5 1.8
2.5 2.5
2.5 3.3
2.5 5
3.3 1.8
3.3 2.5
3.3 3.3
3.3 5
5 1.8
5 2.5
5 3.3
5 5
Figure 1. LOGIC DIAGRAM (POSITIVE LOGIC)
A. All I/Os are set to inputs at reset.
B. Pin numbers shown are for the PW package.
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