TCA8418 Datasheet, PDF (3/37 Pages) Texas Instruments – I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION

TCA8418
www.ti.com ......................................................................................................................................................................................... SCPS215 – SEPTEMBER 2009
TERMINAL
NO.
QFN
(RTW)
WCSP
(YFP)
1
A1
2
B1
3
C1
4
D1
5
E1
6
A2
7
C2
8
D2
9
E2
10
A3
11
B3
12
C3
13
D3
14
E3
15
A4
16
B4
17
C4
18
D4
19
E4
NAME
ROW7
ROW6
ROW5
ROW4
ROW3
ROW2
ROW1
ROW0
COL0
COL1
COL2
COL3
COL4
COL5
COL6
COL7
COL8
COL9
GND
20
A5
RESET
21
B5
22
C5
23
D5
V_CC
SDA
SCL
24
E5
INT
–
B2
CAD_INT
TERMINAL FUNCTIONS
TYPE
DESCRIPTION
I/O
GPIO or row 7 in keypad matrix
I/O
GPIO or row 6 in keypad matrix
I/O
GPIO or row 5 in keypad matrix
I/O
GPIO or row 4 in keypad matrix
I/O
GPIO or row 3 in keypad matrix
I/O
GPIO or row 2 in keypad matrix
I/O
GPIO or row 1 in keypad matrix
I/O
GPIO or row 0 in keypad matrix
I/O
GPIO or column 0 in keypad matrix
I/O
GPIO or column 1 in keypad matrix
I/O
GPIO or column 2 in keypad matrix
I/O
GPIO or column 3 in keypad matrix
I/O
GPIO or column 4 in keypad matrix
I/O
GPIO or column 5 in keypad matrix
I/O
GPIO or column 6 in keypad matrix
I/O
GPIO or column 7 in keypad matrix
I/O
GPIO or column 8 in keypad matrix
I/O
GPIO or column 9 in keypad matrix
–
Ground
I
Active-low reset input. Connect to V_CC through a pullup resistor, if no active connection
is used.
Pwr Supply voltage of 1.65 V to 3.6 V
I/O
Serial data bus. Connect to V_CC through a pullup resistor.
I
Serial clock bus. Connect to V_CC through a pullup resistor.
O
Active-low interrupt output. Open drain structure. Connect to V_CC through a pullup
resistor.
O
Active-low interrupt hardware output for 3-key simultaneous press-event. Open drain
structure. Connect to V_CC through a pullup resistor.
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